Alternatives to Opt-Inbox
Compare Opt-Inbox alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Opt-Inbox in 2026. Compare features, ratings, user reviews, pricing, and more from Opt-Inbox competitors and alternatives in order to make an informed decision for your business.
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1
InboxAlly
InboxAlly
We engage with your emails to teach inbox providers not to send your emails to spam. Our clients have seen their open rates more than DOUBLE within 1-2 weeks! Highly engaged recipients not only open emails, but scroll down as they read. So long as the content is longer than the page, this should be done for nearly all opened emails. When a recipient goes out of their way to take an email out of spam, they are telling the inbox provider, hey, you made a mistake. Moving an email from the promotions folder to the primary inbox tells inbox providers that you disagree with their sorting criteria and it and similar emails should go to the primary inbox. Demonstrates that recipient is interested in the content of your email. We have a set of random generic replies we use for this. Marking an email as important can essentially be interpreted by the inbox provider as "This email is extremely valuable, never send it to spam." -
2
Paubox
Paubox
Healthcare's simple, easy, and scalable way to email secure, HIPAA compliant patient information. Keeping patient data secure and remaining HIPAA compliant is a top concern for healthcare organizations, especially when it comes to email. Paubox Email Suite provides guaranteed encryption so you can rest assured your patient data is protected. Our HIPAA compliant email service removes the hassle of portals and passcodes by sending encrypted emails that can be read right in your recipient’s inbox. Healthcare email encryption is easy with our patented tools which integrate easily into your existing email system with no training necessary for employees. Paubox HIPAA compliant email service is designed to empower IT and simplify the process for end-users, making the frustrations and vulnerability of emailing PHI a thing of the past.Starting Price: $29/month -
3
Graphus
Kaseya
90% of cyberattacks that end in a data breach start with a phishing email. Graphus is a cost-effective automated phishing defense solution for companies of all sizes that protects your customers from today’s biggest cyber threats. Using patented AI algorithm to detect and quarantine suspicious emails fast, Graphus is a powerful boost for your clients’ security (and your MRR). Powerful automated phishing protection for Office 365 and G Suite. Graphus’ unique, innovative AI learns and evolves with each company’s communication patterns to provide three layers of protection against malicious attacks and strengthen your clients’ security posture -- giving you and your clients peace of mind. TrustGraph® automatically detects and quarantines dangerous emails that get through email platform security or an existing Secure Email Gateway (SEG). EmployeeShield® adds an interactive warning banner to questionable messages, prompting recipients to quarantine or mark them as safe with one click. -
4
Bulletproof Inbox
Bulletproof Inbox
The current state of email leaves your inbox wide open to anyone who has your address, inundating you with messages without your consent. The traditional method of achieving inbox zero falls short in the face of email's widespread exploitation. Manual solutions demand an unnecessary amount of time and can negatively impact your peace of mind. Enter Bulletproof Inbox, an email workflow tool that plugs in seamlessly to your Gmail or Outlook email address. Minimize distractions and create a focused email environment by eliminating unwanted email permanently. Reclaim your focus on the things that truly matter.Starting Price: $10 per month -
5
Right Inbox
Ramp Ventures
Have clients in different timezones? Feel inspired at night but only want your email to land the next morning? Our schedule emails to send later feature solves this issue. With Right Inbox, you can write emails at a time that works for you, then have them sent at a time that works for your recipients. You can schedule emails using your recipient’s time zone to ensure they arrive at just the right time. Write follow-ups beforehand and schedule to send them if recipients don’t reply to your first email. When they do, follow-ups are automatically cancelled. Right Inbox’s email sequences feature ensures you never miss a follow-up again. Automate your outreach with email sequences in Gmail. We often have to wear different hats when dealing with email. There is no email signature that fits all. With Signatures, you can create multiple signatures in Gmail and apply the perfect one for every situation with one click. Switch between signatures without leaving your editor in Gmail.Starting Price: $5.95/month/user -
6
OpenText Core Email Encryption
OpenText
OpenText Core Email Encryption protects sensitive information by automatically encrypting emails based on customizable DLP policies and content filters. It secures outbound communication without interrupting user workflows, ensuring compliance for regulated industries such as healthcare, finance, and government. The platform evaluates email subjects, bodies, and attachments in real time to determine whether to encrypt, quarantine, or block messages. Its Best Method of Delivery engine selects the most secure transmission option—S/MIME, TLS, or a secure messaging portal—to guarantee protected delivery to any recipient. Users can communicate securely across devices, while administrators gain full visibility through graphical reporting and compliance dashboards. By reducing human error and automating enforcement, the solution strengthens security posture and supports safe collaboration inside and outside the organization. -
7
PerfectMail Antispam
PerfectMail
PerfectMail delivers better than 99% filter accuracy with false positives (wanted e-mail blocked as spam) at less than 0.1%. PerfectMail automatically learns about your users and their regular e-mail peers and never blocks their e-mail. The only time PerfectMail might have an issue is with a questionable e-mail from new senders. This takes the risk out of antispam filtering. Most spam filters work like this: receive e-mail, queue, filter, deliver or send a non-delivery reply. The problem with this model is that mail is delayed and senders/recipients may never realize that wanted messages were blocked. PerfectMail works in real-time meaning that it filters messages as they are received - without queuing. This means that PerfectMail tells the sender if their message is being blocked. - PerfectMail's antispam engine is programmed C - the fastest programming language in the world.Starting Price: $499 one-time payment -
8
Prebox
Prebox.ai
Prebox.ai is a simple, powerful tool that helps you make sense of your inbox in minutes. Instead of scrolling through dozens or even hundreds of emails, Prebox.ai delivers a clean, easy to read snapshot that summarizes the key points from all your new messages. You’ll see exactly what matters without opening each email. From within the snapshot, you can also take action by deleting emails directly from your inbox with a single click. This makes it easy to clear clutter while keeping only what’s important.Starting Price: $7/month -
9
Delivery Trust
Identillect Technologies
Senders maintain complete control - restrict recipients’ privileges to print, forward or download content, and retract at any time. Identillect evolves with regulatory changes, continuously researching so you don’t have to. Simple for both senders and receivers. No registration or subscription required for recipients. Leverage Identillect’s patented vCard technology to further streamline your secure communications directly from Outlook. Set the level of security desired, enforce enterprise policies across the entire network limiting recipient permissions. This add-in includes access to all Delivery Trust® – Web Only features and capabilities. The DELIVERY TRUST® O365 Add-in makes securing your communications and responses simple while on the go. The intuitive interface means no learning curve with non-invasive implementation company-wide. This add-in includes access to all DELIVERY TRUST® – Web Only features and capabilities.Starting Price: $5.95 per month -
10
ForwardMX
ForwardMX
ForwardMX makes it easy to collect all of your email in a central inbox, such as your existing Gmail account. Collect all of the emails for your different domains in a central inbox. We can send a copy of each message to up to 10 different recipients. Get all of the email sent to any un-allocated address on your domain. No matter what you're working on, or how many of you there are, ForwardMX makes email forwarding for your domain names easy. Create team member accounts to manage your ForwardMX service. No limits to the number of email forwarders that you add for each domain. Add and manage your domains with our simple web based interface, or use our API to integrate ForwardMX with your own application.Starting Price: $9 per year -
11
MailCleaner
MailCleaner
MailCleaner is a business anti spam gateway installed between your mail infrastructure and the Internet. It offers professional protection against viruses and eliminates up to 99% of spam. While email is necessary for any corporate operations, it can also expose your company to a myriad of risks. This is because it offers virus, spyware, ransomware, cryptolocker, trojan and other harmful programs easy access to your business computers for phishing or extortion attack. This is where MailCleaner can help by stopping malware before it even reaches your employees’ inboxes. Its spam filter server ensures that more than 99% of unwanted messages are blocked, analyzing each message, so you only receive those that are important. If a harmful file is detected, MailCleaner will automatically send it to a quarantined zone where it cannot cause any more damage in the future. We are proud to offer a number of packages suitable for small companies as well as large corporations.Starting Price: $1 per month -
12
SmarterQueue
SmarterQueue
Spark conversations that fuel growth. Effortlessly. Reclaim your time and regain your freedom while posting more consistently and driving revenue. SmarterQueue takes the headache out of content scheduling. Each Category has its own separate Queue and Posting Plan, so you don't need to worry about timings. It's all automated. Set your posts to recycle and they'll rejoin your Queue to be published again as many times as you like – increasing your reach each cycle. Quickly solve customer service issues, reply to queries and make your users happy by replying to incoming Facebook messages and Twitter DMs, all from one unified Inbox. Remove the guesswork – discover high quality content that's proven to get engagement and add it straight to your Queue. SmarterQueue makes it easy for you to join the dots between social activity and business results, so you can make data-driven decisions, just like that.Starting Price: $19.99 per month -
13
Sentrya
Sentrya
Sentrya is an email management platform designed to enhance privacy and security by eliminating spam, scams, and phishing emails from your Gmail inbox. It enables users to create personalized whitelists of trusted senders, ensuring only desired communications reach their inboxes. Beyond email filtering, Sentrya assists in identifying and removing personal information from over 900 global data brokers, reducing the risk of data breaches and unauthorized data sales. It also provides tools to locate and delete old or unused online accounts, further minimizing users' digital footprints. With features like viewing all messages in a single interface, creating custom folders for better organization, and permanently deleting unnecessary emails to free up storage space, Sentrya offers a comprehensive solution for managing personal data and maintaining a clutter-free inbox. Starting Price: $8 per month -
14
Neo
Neo
A professional-looking business email that lets your customers and partners know you mean business. A custom domain that matches your business name helps build credibility with your customers. Powerful features that help streamline productivity and strengthen customer relationships. Get notified the moment your recipient opens your email. Quickly respond to your most commonly received inquiries. Schedule your emails to be sent when they're most likely to be read. Get nudged to circle back and keep your conversation going. Prioritize your most important emails first and check the others later. Prevent specific email senders or entire domains from landing in your Inbox. Keep your emails under lock-and-key with spam checks and 2-factor authentication. Fix your typo before it lands in your customer’s Inbox. Create your branded, mobile-optimized website, no design or code experience is required.Starting Price: $1.99 per month -
15
GFI Archiver
GFI Software
GFI Archiver makes it easy to secure, store and retrieve your electronic communications. The solution lets you archive and manage your email, calendar and file history in one place and provides easy access when it’s needed. Meet compliance requirements, reduce server space, improve email performance, lower costs and more. Messages, attachments and files are automatically indexed before they’re archived, enabling faster search and retrieval. Quickly retrieve email history and files, using either desktop or mobile. Archives electronic communications separately from applications to save server space and improve performance. Uses single-instance storage (SIS) to store one copy of a multi-recipient email, instead of multiple copies of the same email. Compresses (and decompresses) email attachments to optimize use of your storage resources. Use message auditing to validate that stored emails and files are genuine.Starting Price: $29 per year -
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Mailchimp Transactional Email (Mandrill)
Mailchimp
Transactional emails: Reach inboxes when it matters most. Deliver fast, personalized transactional emails using API or SMTP. Get the benefits of our experience sending billions of emails globally. Send personalized transactional emails that reach inboxes, not spam folders. Customize your analytics with pre-built dashboards, export API, and more. Read documentation guides, or contact our award-winning Support team for help. Use custom tagging, whitelabeling, conditional content, and more. Globally distributed infrastructure: Featuring automatic SPAM loop registration and pre-warmed dedicated IPs. Get analytics in multiple ways, plus custom tags, A/B test capabilities, and comparative reports. Utilize white-labelled click tracking, custom reverse DNS, rules engine, custom return path, and sub-accounts. That’s the average time to delivery for top 3 ISPs, sent from our MTAs to the recipient’s email server. -
17
FollowUpThen
FollowUpThen
FollowUpThen is a simple, flexible email address that can be used with any email system on any device. Explore below how this simple email address can boost your productivity. Experiment above as you go! How many times have you looked at the same message sitting in your inbox that you kept there just so you don't forget? Forward it to FollowUpThen instead – it will arrive back the moment you need it. Out of sight, out of mind. Inbox zero might actually be closer than you think. Become your own personal assistant and make your future-self look good. Schedule exactly the right information to appear at exactly the right time – contact info, links, boarding passes, etc. Use our tasks feature to ensure something gets done along with SMS alerts if it's really important. Emailing a forgetful recipient? Use our response detection feature to make sure your email doesn't get lost. Think of it as response insurance.Starting Price: $5 per month -
18
Keluro
Keluro
Save time spent on cc’d and forwarded emails by introducing shared channels. Onboarding new team members become a breeze with a shared archive. Never again lose information in the inboxes of employees that left your organization. Store messages from business partners outside your organization in a knowledge platform. Keluro increases team collaboration by making relevant email conversations accessible to coworkers in shared channels. Our smart algorithm suggests appropriate channels to share your emails, both sent and received, with one click. You decide what remains in your private mailbox. Keluro's adaptive organization, archiving and visualization of emails ensures you stay on top of the most relevant information, all in one place. Effortlessly find information and emails related to a project or department in dedicated channels, even if you were not among the recipients. Easily retrieve archived emails and don't lose time reconstructing missing information.Starting Price: $6 per month -
19
Alias Email
Alias Email
Alias Email is a privacy-focused email forwarding service. Create email aliases in one click - unique and anonymous email addresses that forward to your real inbox. Use them for newsletters, signing up on websites, or managing different roles in your work. Stay organized and secure without revealing your personal email! Alias Email is perfect for: - Privacy: keep your personal email invisible from third parties and data brokers; - Spam control: use a unique alias for every service. If spam arrives, you can disable this alias; - Inbox organization: route messages by alias, making it easy to filter and manage communication; - Easy to use: no complex setup, no apps to install - aliases that work anywhere, instantly. Alias Email doesn’t store your messages and never sells your data. Our mission is clear: to give you back control of your email identity in a world that increasingly profits from it.Starting Price: $4.99/user/month -
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Spike
Spike
Spike brings your entire workspace into your Inbox: email, chat, calendar, calls, team collaboration, tasks — to one powerful Inbox. Everything you need to get your work done is in a single feed, so you can finally give the app-switching a rest. Spike’s conversational email fuses traditional email with instant messaging — eliminating cluttered email threads. With real-time conversations and live collaboration, have better interactions and a more human communication experience. Spike is available on iOS, Android, Mac, Windows & Web.Starting Price: Free -
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ActiveInbox
ActiveInbox
Stop emails sinking into the inbox swamp by turning them into tasks with due dates and adding them to projects. Don't 'send and pray' emails you spent precious time writing. Deliver at the time they'll be read and let ActiveInbox track them to completion. Achieve inbox zero, then glide through your day, by having just one place to focus on emails and tasks, and breaking your Today list into digestible chunks. With ActiveInbox there's no need to adopt yet another new system; no call to copy, paste and switch between software. It's right with you where you spend the lion's share of your day wrangling tasks: in Gmail. Ever been writing an email, and worried that you’ve forgotten something? Not with ActiveInbox. With the existing tasks and conversations for each contact available at-a-glance you’ll be right on track. Release your mind from niggling anxiety, by letting ActiveInbox track emails until recipients respond.Starting Price: $4.16 per month -
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Yandex Message Queue
Yandex
Use standard or FIFO (first in, first out) queues depending on the number of RPS (requests per second). Use familiar tools for interacting with Amazon SQS, the HTTP API, CLI, and libraries for various programming languages. Message Queue uses fast NVMe-enabled solid-state drives to store messages. Messages are stored as multiple copies in geographically distributed availability zones. This ensures reliable storage and low latency with write confirmations. Message Queue is integrated with cloud functions, a trigger invokes a function that handles messages from a queue. Create a queue and view the number of messages and call duration in statistics. Consumers read messages from a standard queue in random order. Standard queues guarantee that each message is delivered at least once. In rare cases, a message can be received from a standard queue twice. Use standard queues when you need maximum throughput.Starting Price: $0.012240 per GB -
23
Email Monster
Email Monster
Email Monster consolidates emails from multiple senders or aliases into a single digest, delivered weekly or monthly, effectively reducing inbox clutter. This feature is part of a broader service offering unlimited temporary email addresses that forward to your real email, enhancing privacy and allowing you to control who can contact you without exposing your primary email address. These temporary addresses can be easily created or deactivated, providing a flexible solution to manage spam and keep your inbox organized.Starting Price: $0 -
24
Boomerang
Baydin
Schedule an email to be sent later. Easy email reminders. Boomerang for Gmail lets you take control of when you send and receive email messages. With Boomerang, you can write an email now and schedule it to be sent automatically at the perfect time. Just write the messages as you normally would, then click the Send Later button. Use our handy calendar picker or our text box that understands language like "next Monday" to tell Boomerang when to send your message. We'll take it from there. Want a cleaner inbox, but don't want to lose track of important messages? Use Boomerang to take messages out of your inbox until you actually need them. Just click the Boomerang button when you have an email open, and choose when you need it again. Boomerang will archive your message. At the time you choose, we'll bring it back to your inbox, marked unread, starred or even at the top of your message list. -
25
SkimAI
SkimAI
Transform your inbox into a hub of efficiency. Streamline your communication to focus on what matters most. SkimAI is an AI assistant that transforms emails into actionable insights. It integrates seamlessly with Gmail and highlights unread emails, generates concise summaries of incoming messages, and drafts replies for your quick review and dispatch. Introducing intelligent email management. With AI-driven scheduling and custom workflows, SkimAI is more than a tool, it’s your productivity partner, evolving with your needs. Transform your emails into clear actionable insights. Embrace an inbox where efficiency thrives, decisions are swift, and clarity is paramount. Gain valuable time as communication is curated and prepared, even when you're away from your inbox. -
26
SpamCheetah
Gayatri Hitech
SpamCheetah is a very affordable and effective way to combat spam, malware and viruses at mail server level. It operates as an SMTP proxy and stops all kind of phishing and business email compromise at SMTP level. It uses a combination of network level techniques like greylisting, greytrapping, blacklisting, URL scanning, malware API checks and a lot more. It comes with standard email gateway features like sender and recipient based blocking, attachment size blocking, MIME type filtering and pattern based blocking alongside quarantine reports and mail metadata reports and much more. We offer trial for 30 days along with two editions, one for single mail server and one for multiple mail servers. We also offer ISO download, VMWare appliance and raw VM download options.Starting Price: $1/month/user -
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Libraesva LetsDMARC
Libraesva
Libraesva DMARC Protection is an email authentication and domain protection solution designed to prevent spoofing, phishing, and unauthorized use of corporate email domains. It simplifies the deployment and management of DMARC, SPF, and DKIM by providing a guided setup and centralized control that does not require deep DNS expertise. Through its intuitive dashboard, organizations gain real-time visibility into who is sending emails on behalf of their domain, including authentication success rates, failures, and traffic sources. It aggregates and analyzes detailed RUA reports from ISPs, enabling administrators to identify legitimate senders, detect misconfigurations, and block malicious activity. LetsDMARC also allows organizations to gradually enforce stricter DMARC policies, moving from monitoring mode to quarantine or reject actions to stop fraudulent messages. -
28
Folderly
Folderly
AI-based email deliverability platform for monitoring, spam testing, and maintaining your email deliverability by solving any spam issues. Our goal is to help marketers accelerate their sales by assisting them in sending emails that drive revenue. Over 51% of all business emails worldwide never reach the inbox. Losing your emails to spam folders ultimately leads to budgeting issues and missed sales opportunities. Folderly makes sure that you're never in that 51%. Avoid blacklists, bypass spam filters, and see your messages delivered to your email recipients’ inboxes. We designed Foldely from the ground up to help companies receive returns on their marketing dollars. Whether you're looking to increase the email deliverability of your emails across multiple email addresses, or want to prevent any spam-related problems before they occur - Folderly is a great starting point to make sure your messages are reaching your recipients' inboxes.Starting Price: $160 per month -
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WinDeveloper Message Recall
WinDeveloper Software
WinDeveloper Message Recall supports Exchange 2007 and 2010. Earlier Exchange versions are not supported. Windows Small Business Server SBS packages that include the above Exchange versions are also supported. WinDeveloper Message Recall is a 64-bit application and supports all x64 Windows Server platforms including Windows 2003, Windows 2008 and Windows 2008 R2. In organizations running MS Exchange 2007/2010 on a single server, simply install WinDeveloper Message Recall directly on the Exchange server machine. WinDeveloper Message Recall adds many critical features that are not available out of the box. Amongst others, it provides a predictable recalling process. Users can rely on the fact that if they immediately realize an error was committed they will be able to successfully recall the email without the recipients ever knowing. This is true whether the email was addressed to local or foreign recipients.Starting Price: $290 one-time payment -
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SimplyFile
TechHit
implyFile includes an advanced artificial intelligence algorithm, which quickly learns about your filing habits and then starts to predict where you will want to move every message. After a brief training period, filing a message to the right folder becomes literally one click. Stop wasting time on drag and drop, SimplyFile instead. Even if you manage your Inbox, sent messages tend to pile up in the Sent Items folder. It does not have to be this way. SimplyFile can prompt to file sent messages as you are sending them, so you keep them as neatly organized as your incoming email.An overflowing and ever-growing Inbox is a constant source of low-level stress. Get back your sanity and sense of control with SimplyFile's filing, cleanup and task tracking features. Let your tidy Inbox give you a smile, not stress. Get started in 10 minutes and feel in control of your mailbox as never before. Simple installer can be used by individual users without admin permissions.Starting Price: $2.99 per user per month -
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SEDNA
SEDNA Systems
Cut down email volume by up to 95% and get one source of truth for all conversations, data, and documentation through shared team inboxes. Unlike siloed email accounts, SEDNA gives team members controlled transparency of all correspondence, attachments, and actions taken within a project or message thread—along with quick composition and sharing capabilities—for more efficient communication and effortless collaboration. Each email within a team inbox has its own activity panel to host internal conversations, contextual data, and time-stamped activity that enables team members to work with—and around—one message in place of forwards, reply-alls, and cc’s that bloat email volume. The Activity Panel lets you see automatically generated or manually applied message details like category tags, job references, and people involved, as well as who viewed the message, who replied, and how so. And collaboration is easy with the ability to tag others and add comments for real-time discussion. -
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Azure Queue Storage
Microsoft
Use Azure Queue Storage to build flexible applications and separate functions for better durability across large workloads. When you design applications for scale, application components can be decoupled, so that they can scale independently. Queue storage gives you asynchronous message queueing for communication between application components, whether they are running in the cloud, on the desktop, on-premises, or on mobile devices. Use Queue Storage to rightsize your service deployment. Applications absorb unexpected traffic bursts, which prevents servers from being overwhelmed by a sudden flood of requests. Monitor queue length to add elasticity to your application, and deploy or hibernate additional worker nodes based on customer demand. -
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Arnica EmailServer
Arnica Software
Arnica EmailServer is an enterprise-strength tool for automating both mass-emailing and single email processing tasks. Arnica EmailServer also provides functionality for performing either scheduled or on-demand download of incoming emails for multiple accounts and storing them in easy-to-access database tables through specially created database APIs. All email queue, mass-mail and incoming email management is done through a web browser interface. Arnica EmailServer allows you to avoid direct interfacing with low-level SMTP subsystems by providing a high-level easy-to-use application programming interface. You may publish emails into an outgoing queue (or mark them to be sent immediately) using web requests with posted XML provided by Arnica EmailServer, which includes email content together with sender/recipient information as well as other data required for sending an email. -
34
Clyton
Gammadyne Corporation
Clyton is an email client with advanced security and spam filtering features. The spam filter is highly configurable and supports DNS blacklist checking (DNSBL). Expect 85% of spam to be eliminated with the default configuration. Email that is suspicious but not obviously spam is quarantined for 24 hours and then retested, providing the blacklist enough time to react to new spam sources. The built-in address book supports personalized mass-mailings. Received email cannot run scripts, download multimedia, or use embedded objects without your approval. Other features include encrypted storage, whitelisting, powerful HTML editor, attachment viewer, message drag and drop, custom message templates, SSL encryption, USB flash drive installation, and much more.Starting Price: $29 -
35
Rebump
Rebump
Rebump sends friendly follow-up messages to your email recipients for you. These automated emails are customized to appear as if you sent the email yourself. You can track and analyze all of your follow-up emails with your Rebump account. Simply install the Rebump extension to your browser. Then, add Rebump to an email before you send it. Now sit back and relax. Rebump will monitor the email thread. If no response it will automatically send followup emails. Rebump will continue sending custom followup emails at set intervals and will stop once the recipient responds. Rebump makes the most of every email you send. If your recipient doesn't respond, you've missed an opportunity. Don't let another one pass by. You can easily monitor the progress of each email and see who has still not replied. Simply click on the Rebump checkbox on emails that you'd like us to send follow-up emails for you.Starting Price: $5 per user per month -
36
Smart Inbox AI
Smart Inbox AI
Smart Inbox is an email management solution is built to help individuals and businesses streamline their email workflows by organizing, prioritizing, and automating responses with the power of AI. The solution offers intelligent email organization, automatically categorizing incoming emails based on content, sender, or urgency, ensuring you never lose track of important messages. AI-powered prioritization highlights the most critical emails, enabling you to focus on what matters most. With customizable rules and filters, you can tailor the system to your unique needs. Automation is at the heart of this solution, enabling you to set up auto-responses for routine inquiries. his drastically reduces response times and enhances your communication quality. Additional features include seamless integration with popular email clients, real-time notifications, collaboration tools for team inboxes, and insightful analytics to track and optimize your email management. Whether you’re a buStarting Price: $10/email account/month -
37
ScaledMail
ScaledMail
ScaledMail is a specialized email infrastructure platform designed to support large-scale cold email outreach campaigns while maintaining high deliverability and sender reputation. It provides businesses with preconfigured email infrastructure that allows them to send large volumes of outbound emails without needing to manually set up domains, mailboxes, or technical authentication systems. Instead of building and maintaining dozens of individual email accounts, users receive ready-to-use inbox environments distributed across multiple domains, which helps distribute sending volume and reduce the risk of emails being flagged as spam. It automates complex technical requirements such as DNS configuration and email authentication protocols, including SPF, DKIM, and DMARC, ensuring messages are properly verified and more likely to reach recipients’ primary inboxes. -
38
Mailbutler
Mailbutler
The email extension that does it all. Write your emails faster and easier. Turn often-sent messages into easy-to-use templates, so you can spend less time composing, more time on meaningful conversations. Never miss opportunities because of forgotten emails again. Mailbutler keeps you in the loop so you can always stay on track. Get notified when it's time to follow up on an important email. Organized ideas = Organized mind. Add reminders and notes to your emails, share with your team and sync them with your favourite productivity app - all without leaving your inbox. Know exactly if and when your emails and links are being opened and clicked - take action at the right time, to the right person. Schedule your emails for any desired time and optimize touch points based on you and your contacts' availability. Leave a lasting impression, drive conversions and promote your brand easily with Mailbutler's professional signature templates.Starting Price: $30 per user per month -
39
‘nflow
'nuffsaid
Get your actual work done. A smart space for your work apps. ‘nflow helps you take back control and saves you 2 hours per day. The typical knowledge worker now spends 4.1 hours/day on email. And if you’re a Slack user, figure 70 messages per day. And that’s not counting the rest. ‘nuffsaid integrates your email, chat, Salesforce, LinkedIn, SMS and more into a single customizable view. Your AI assistant automatically prioritizes your email, chats, meetings and tasks, and eliminates tedious activities like data entry. Stop switching between your task list, email, and calendar. With ‘nuffsaid you can drag and drop messages and tasks into your calendar, then back to your inbox. The days of a separate task list are gone. Easily convert messages and meetings into tasks, assign them, and get auto-alerts when tasks are overdue. Can't remember where a conversation happened? Quickly find messages, attachments, tasks, and appointments across all your tools in a single search engine. -
40
Despite the rise in text messaging, instant messaging, and social networking, email continues to be the predominant business collaboration tool. The unsecured nature of email, however, exposes sensitive information to malicious attacks. The Cisco Secure Email Encryption Service (formerly Cisco Registered Envelope Service) provides enhanced security and reliable controls for traditional email tools. It is fully integrated into most common email technologies and into a user's daily email routine. Encryption is triggered by policy or by data loss prevention tools. Cisco Secure Email creates an encryption key then wraps the email in an HTML envelope and delivers it to the recipient. When Envelope Storage is enabled, the key and message are stored temporarily in the Secure Email Encryption Service. The recipient clicks on the link to open the message on any device. Secure Email Encryption Service is based on technology that uses the most reliable email encryption algorithms available.
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41
myMail
My.com
An expert way to manage all email accounts. Your email provider doesn’t support push notifications? With myMail it does. Hate it when an email wakes you at night or distracts you from your barbecue? Choose when you want to receive push notifications. myMail brings profile pictures of your contacts to your message list. Take a look at your inbox to instantly know who’s writing you. myMail displays icons from popular services so that you can recognize the sender in a blink. Your friends don’t use an avatar? We’ll do it for them! For a contact that has no avatar, myMail displays the first letter of the contact’s name. myMail does exactly what it’s meant to do – help you manage your emails – and it does this incredibly well. Traffic compression brings your messages into your mailbox quickly. So you can use your data plan for other things, like watching that cool video. Brings your email in superfast even if the number of messages and contacts you have grows to an amazing size. -
42
Flow-e
Flow-e
Flow-e is a visualization layer on top of your Outlook inbox. It provides an elegant Kanban-like workflow that's combined with the ideas behind Inbox Zero and GTD. Flow-e eliminates the need of external task management tools and transforms your inbox into a central To Do app. Thousands of our users describe Flow-e as: Genius, Game-changer, Fabulous, and much more. Flow-e is just a visualization layer on top of your original inbox, you will never lose your data. We visualize your inbox in real-time without storing email messages on our servers. Designed for managers, Flow-e takes you to Inbox Zero and beyond by turning your Outlook mailbox into a visual taskboard. Personal tasks and emails are now managed from your mailbox in a visual workflow, customized for your process. Your daily schedule is visualized in a timeline. Setting up meetings and reminders without leaving your mailbox is a click away.Starting Price: $5.00/month/user -
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Sendmail
Proofpoint
The sendmail Sentrion platform is specifically designed for large, complex environments, but we make a subset of that solution available as an open-source offering. Sentrion is not for everyone, but if you are using open source email for a large complex environment and need an enterprise platform that will enable your messaging roadmap for years to come (virtualization, consolidation, cloud migration, etc.). The Domain Keys Identified Mail (DKIM) Internet standard enables email senders to digitally sign their messages so that receivers can verify that those messages have not been forged. The DKIM sender authentication scheme allows the recipient of a message to confirm a message originated with the sender’s domain and that the message content has not been altered. A cryptography-based solution, DKIM provides businesses an industry-standard method for mitigating email fraud and protecting an organization’s brand and reputation at a relatively low implementation cost. -
44
Coresender
Coresender
We get your emails delivered in seconds. Your customers never have to wait for the emails they are expecting or need immediately, like password resets, order confirmations etc. We do all the hard work to place your emails straight in your recipient’s inbox, so you can focus on delighting even more customers and growing your business. Transactional emails, such as password resets, email confirmation links, order receipts must be delivered immediately. We ensure that they are always our top priority. That’s why we’ve separated our sending infrastructure, to ensure this priority. When you use a transactional sending account, you know your most important emails will never be affected even by the biggest of your email marketing campaigns. Your sender reputation is critical for email delivery and should always be your concern. We work with you every step of the way to improve your sender reputation score and keep it at a high level. -
45
Inbox Zero
Inbox Zero
Inbox Zero has undergone a thorough security process with Google to ensure the protection of your emails. You can even self-host Inbox Zero on your own infrastructure. Don't search for the unsubscribe button. Unsubscribe with a single click or auto-archive emails instead. See who's sending you the most marketing and newsletter emails to prioritize who to unsubscribe from. View analytic charts to see how often you get emails from certain senders to take action. Understanding your inbox is the first step to dealing with it, understand what is filling up your inbox. Then figure out an action plan to deal with it. Our AI agent will reply, forward, or archive emails based on the rules you provide it. Let our AI plan what to do for you, accept or reject in a click. Turn on full automation once you're confident the AI can work on its own.Starting Price: $10 per month -
46
MailClark
MailClark
MailClark is an external communications bot solution that centralizes all correspondences into Slack or MS Teams for easier communication. With MailClark, users can allow the bot to host the help desk of their customer support team, create a team inbox for their sales or marketing team, and more. MailClark also features a shared inbox that stores mentions, internal-only comments, collision detection, and more. Be faster and better in your customers, suppliers, colleagues replies as well as in engaging conversation with your team. Get "Too Fast Too Furious" in your workspace. Collectively manage your external messages from customers or any external contacts, directly in your collaborative tool (Slack or Microsoft Teams). Never miss any external messages, email, Facebook or Twitter messages. MailClark reminds you to take care of each of your customers or external contacts.Starting Price: $9.00/month -
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SMTP Provider
SMTP Provider
Experience the next level Email Marketing at an affordable price. Use a dedicated IP address to increase your sender reputation and avoid blacklisting of your IP due to someone else’s actions. Show that it’s really your own company and domain sending the message, and minimize the amount of messages that are marked spam by using the special cryptographic signatures SPF and DKIM. Our SMTP servers send your emails using secure SSL connection. Moreover, it's lightning fast. For each mailing list, you can discover the amount of messages sent out, the number of conversions made and links clicked, and many other details. Our SMTP service generates sending reports and delivery error reports. All reports can be downloaded to your computer. Your mailings won’t be sent to any addresses on the list of recipients who have unsubscribed, even if they are on a mailing list. Make sure that your emails are delivered to the inbox and not the spam folder. -
48
Hornetsecurity Spam Filtering and Malware Protection
Hornetsecurity
Hornetsecurity’s Email Spam Filter and Malware Protection Service offers the highest detection rates on the market, with 99.9% guaranteed spam detection and 99.99% virus detection. Our Spam Filtering Service effectively protects mail servers against DDoS attacks and phishing emails. Our multi-layered spam filtering service blocks the majority of spam emails as they arrive—keeping the quarantine clear and easy to manage. With proven features and thorough spam filtering mechanisms, your inbox remains free of annoying spam emails. The abbreviation DDoS stands for Distributed Denial Of Service. A DDoS attack is a type of DoS attack in which multiple hijacked systems are used to overload system resources or network bandwidths. This makes websites and online services unreachable. For companies, this often means large financial losses due to delivery bottlenecks, for example, and major damage to their image from the perspective of customers. -
49
Cofense Vision
Cofense
With Cofense Vision, you can search and quarantine emails within minutes or set a policy to auto-quarantine with no intervention across your entire organization. It can be easily deployed based on your environment and regulatory requirements. Automatically remove malicious emails before users see them. Vision finds the slightest changes, increasing visibility tenfold. Vision identifies on average 90 malicious email campaigns per month, each targeting multiple individuals throughout the organization, oftentimes before they're even reported. And all of these threats were missed by existing technologies. Rapidly detect and automatically eliminate phishing attacks in minutes, not days or weeks. Leverage global crowd-sourced phishing intelligence from 32 million people reporting suspected phish. Seamlessly automate the removal of phish from your enterprise environment. Get personalized security reports, actionable intelligence, and direct access to phishing experts. -
50
Extra Thursday
Extra Thursday
Extra Thursday is an AI-powered inbox assistant that connects to your Gmail and Google Calendar (via OAuth) to transform email management into a fast, context-aware, streamlined workflow. It treats your inbox like a database: it can scan thousands of emails in seconds, extract key insights or open loops, surface important threads, and highlight action items, so you don’t have to manually sort, search, or triage messages. Extra Thursday also drafts professional replies (from polite follow-ups to technical responses), auto-generates follow-up emails, and lets you review/edit before sending, dramatically reducing the time you spend writing and replying. With deep-context AI reading and understanding entire conversations, the platform helps manage email overload and makes your inbox actionable, rather than overwhelming. Privacy-wise, emails and calendar data are only fetched on demand per session; Extra Thursday does not store your full inbox or use your content to train its models.
