Alternatives to TestSubject
Compare TestSubject alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to TestSubject in 2026. Compare features, ratings, user reviews, pricing, and more from TestSubject competitors and alternatives in order to make an informed decision for your business.
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1
Mizy
Mizy
Improve your open rates by testing your subject lines before hitting send. This AI-powered tool grades your subject lines based on data from over 1 million campaigns. After talking to hundreds of marketers, we know that creating content is the most time-consuming marketing activity. And when your subscribers don’t open your emails your time and energy go to waste. That’s unacceptable! To combat this, we developed Mizy: an Artificial Intelligence that tests your subject lines and gives you tips based on real campaigns. Our AI, Mizy is continuously analyzing thousands of email campaigns. Unlike other subject line Testers, she doesn’t decide your scores based on benchmarks, fake “best” practices or old case studies. She actually gives you feedback based on the actual result of real campaigns. -
2
Inbox Pirates
Crewcharge Technologies
Inbox Pirates is an email preview, email testing & subject line testing software tool that powers email marketing and sales outreach teams to get a great boost in email opens. It previews your email on popular email clients like Gmail, Yahoo, and Outlook, and on several devices and screen sizes. Inbox Pirates allows you to preview, test, and analyze emails using the chrome extension and integrates with popular mailing tools like Hubspot, Apollo.io, Brevo, Mailchimp, and Gmail. It allows you to fix broken HTML emails. With NLP and AI - Inbox Pirates creates an email checklist with your email's reading time, character count, word count, spelling mistakes, and checks for accessibility issues to grade your emails and generate an email score. You can also preview your emails on notification bars, inbox views (when stacked up with other emails), and when it's open on various smartphone devices like iPhones and Google Pixels.Starting Price: $0 -
3
Litmus
Litmus Software
Build, edit, and instantly preview your emails across 90+ clients. Plus, utilize integrations with popular email platforms to speed production and reduce errors. Catch broken links, images, and tracking, as well as test campaign load time, scan your subject line for improvements, and more with a simple, automated check. Quickly identify potential issues preventing your email from being delivered, and use actionable in-product advice to fix them.Starting Price: $99 per month -
4
SubjectLine
SubjectLine
SubjectLine.com is a division of Worldata. Contact us today to receive more information about how we can help you and your company with your marketing strategies! SubjectLine.com has become the industry’s leading email marketing resource. The site includes major marketing related news items, best practices and a free subject line rating tool that allows marketers to test any subject line for possible deliverability and marketability issues. The tool scans for over 800 unique rules that could impact a marketer’s email open rates and deliverability. Results provide marketing-related suggestions that are based on 6 billion+ email messages checked, improving marketers overall campaigns. These results enable marketers to acquire new customers utilizing the best permission email data available, improve email customer data hygiene and depth and provide strategic consulting services for both retention and acquisition email efforts. -
5
LeadSparrow
LeadSparrow
LeadSparrow's drag & drop email designer enables you to build beautiful mobile-friendly emails in seconds. You do not need to start from scratch. Our email designer comes with pre-designed email templates to get you started quickly. Put your email in context. Personalize your email for higher conversion rate. With powerful merge tags, personalization is simply inserting the right tag at the right place in your email. Got more than one brilliant idea for your next marketing email. Run A/B Test to find out the winning formula. A/B Test your subject line, sender name or call-to-action for higher engagements. Say goodbye to "check your spam folder" reminders. With innovative Smart Spam Checker, your emails always hit the inbox. Make sure to run everything through spam checker for confirmed inbox delivery.Starting Price: $29 per month -
6
Mocke
Mocke
Mocke (Mock Email Campaign) is an AI-powered tool for testing cold email strategies without sending real campaigns. Users upload a CSV file to launch a mock campaign in just one click and receive simulated outcomes, including reply rate, unsubscribe actions, report-spam flags, internal forwards, reminders, and ignores, in as little as one minute. This allows rapid AB testing of copy, subject lines, CTAs, and messaging, and uncovers hidden lead behaviors without launching real campaigns, saving over 99% of the time traditionally needed for testing while offering deep analytics and insights.Starting Price: $79 per month -
7
Send Check It
Send Check It
How can you stand out in the inbox? Get more opens? Compare it to 100,000+ other emails sent by marketers like you. You may be able to improve with some tweaks. A measure of how easy-breezy it is to read your subject line. Don't shy away from using well known industry specific terms, just don't make it complicated. Reading Grade Level is a mixture of word choice, complexity and length. Writing at a lower level tends to generate more opens. How many words in your subject is less important than the right words. Keep it specific. Focus on what your reader will get out of opening this email. Just don't make it too short (hurts opens) and if you go long, try and put multiple CTAs or value propositions into the subject. Putting a fake RE: or FWD: at the beginning of your subject may temporarily boost open rates, but is not recommended unless you're actually responding to an email. Many email clients and anti-spam systems have begun flagging these as suspicious. -
8
UniSender
UniSender
Stay in touch with your clients and increase sales with our email marketing tools. Upload a CSV/XLS or paste from anywhere — anything works! Use the creative email builder or responsive templates. Add images, text, and other design elements. Come up with a catchy subject line, add your contacts, and click send. Sit back, and watch your metrics grow! Avoid repetitive tasks and increase sales. Set up automation to run emails 24/7. Get new subscribers with Facebook Ads and funnel them straight into your UniSender account. If you need an attractive HTML template for an email, you have your pick. All of our templates are fully responsive and look amazing on all devices. Build an email yourself in our demo email builder. No coding/design experience needed. New to email marketing? UniSender will analyze your emails and suggest improvements so you can avoid common mistakes and spam filters. Achieve more by going Pro with our Standard Plan.Starting Price: $10.00/month -
9
Sender Score
Sender Score
Your Sender Score is like a credit score to gauge your credit worthiness but for email: It measures the health of your email program. Sender Score is a number between 0 and 100 identifying the quality of your sender reputation and details how mailbox providers view your IP address. Mailbox providers take a lot of metrics into consideration to determine your sender reputation including spam complaints, how many unknown users you email, if you’re on any industry blacklists, and more. If your Sender Score is below 70, you need to repair your sender reputation. Download the Fundamentals of Email Marketing to understand the criteria mailbox providers use to determine which senders reach the inbox and how to improve your performance. Continue following industry best practices and optimizing your email program. Download the Secrets of Best in Class Senders to learn how to build and run an effective email program. -
10
Debug Mail
DebugMail.io
How Debug Mail work The service provides command-line access to the virtual SMTP-server. The sender and receiver addresses can be anything, since no real mailings are sent. The technology used by application developers does not matter, the service will work with PHP, Python, Ruby, Node.js, .NET and many other programming languages and frameworks. Sharing options Sharing is the main feature of Debug Mail. To see what the service and other mailings will look like, just connect the right users to the project in the service, and they will see the same thing as the developer who is testing the mailing. What you can do in Debug Mail - Send emails to non-existent test addresses instead of real ones. - Set up email distribution lists with colleagues using team access. - Work together with other developers on the service.Starting Price: $2 per user per month -
11
Automizy
Automizy
Automizy is an Email Marketing Automation software. We offer AI-powered Subject Line Tester, AB testing, Resend, and Email Automation. Features made to increase your email open rate by 34%. Automizy provides you with tools to make your emails stand out in a crowded inbox. You can also, send campaigns, build automation, create forms, manage contacts, measure and optimize results. Write up to 4 different subject lines for your automated emails. Our multi-armed bandit algorithm optimizes and sends the variations with the highest open rates.Starting Price: $9.00/month -
12
Email on Acid
Sinch
Our three-step workflow fits into your existing production process, making it easy to save time, drive value, and connect with more subscribers. Deliver error-free emails with the push of a button—no HTML experience required! From UTM validation, and accessibility checks that ensure ADA compliance, to validating and replacing the first frame of animated GIF’s for Outlook, we offer customizable click-to-fix tools that fit your team’s specific requirements. Subscribers can’t engage with your campaigns if they don’t receive them. Improve your email deliverability—and land in more inboxes—with blocklist domain and spam tests. Check your email against 23 of the most popular spam filters and test your IP address against the most popular blocklist services. Resolve any deliverability issues before you click “send.” Every inbox displays emails differently. With previews on over 90+ clients and devices, we help you make certain your message displays as intended—in every inbox.Starting Price: $86 per month -
13
Email Shield
Fraud.net
Email Shield is a cloud-based email security add-in, which helps businesses across various industry verticals such as banking, fintech, eCommerce, government, mobile, travel, gaming, telecommunications and more, prevent email-based fraud attempts and receive fraud risk scores and alerts. It tracks and verifies trusted contacts, letting users expose risky emails and ensuring safety of financial transactions. Email Shield allows accounts payable (AP) agents to scan emails, AP senders, and attachments and approve, escalate, or reject payment and account change requests. The system accesses and modifies personal details in the active message including the subject, body, recipients, sender, and attachment information to ensure protection from invoice, vendor, and wire fraud. -
14
ISnotSPAM
ISnotSPAM
Sending newsletters and email marketing is not easy. You need to work on the design, the graphics and the content. Being busy with all that work, you might forget to check if your content is set to trigger some spam filter which will send your hard work straight to the subscribers' spam folder. IsNotSpam online spam checker was created to help you test email and newsletter content, and alert if it is likely to trigger spam filters. 99.99% of email accounts use spam filters these days. Spam filters recognize spam messages by analyzing message content for spam characteristics. Sometimes these filters fail and mark legitimate emails as spam. Such emails are sent to the Spam folders and are not seen by the recipient. This filter failure is called a "false positive" as it marked a legitimate non-spam message as spam. Newsletter senders and email marketers need to check that their emails do not have spam characteristics in order to lower the risk of their newsletters being marked as spam. -
15
Unibox
eightloops GmbH
Unibox is a people-centric email client that organizes your messages by sender. The contact list on the left is sorted by the date of the last email and each person is displayed only once. Selecting a contact displays all messages that you exchanged with that person, similar to chat applications or smartphone SMS apps. Seeing all emails you exchanged with a person in one list lets you concentrate on the actual communication with that person, which feels much more natural. If you need to look at a specific conversation, possibly with multiple participants, Unibox lets you easily drill down into a thread view by clicking the button next to the subject. Unlike other email clients Unibox displays attachments not only as part of the message but provides you with two additional views containing all files that you exchanged with another person. -
16
Mail250
Mail250
Mail250 offers simple tools to help you reach the most active email addresses so that your sender reputation remains intact and more engagement happens on your emails. The real happiness is not when we send, but it is when someone replies to our emails. Keeping this to the core, Mail250 offers content analyzer tools to help you craft the best email subject lines and content to drive better engagement rates. Mail250 uses its homegrown i-MTA engine to keep itself updated with recent changes to global anti-spam and email delivery policies. Just keep sending without worrying about speed and email throttling issues – Smart delivery default activated. Numbers are good, but converting those to actionable is what matters. Mail250 share simple metrics and insights which can help troubleshoot what went wrong with your email campaigns. We’re profitable, privately owned, and there in the industry for a long. Long? Yes, you heard correctly!Starting Price: $20 per month -
17
Emelia
Emelia
Your cold emailing is better than ever! With an intuitive platform, detailed analytics and exclusive features. Writing an effective cold email is a crucial step in email prospecting. Also known as cold mailing, it's a prospecting technique that fits into a company's business strategy and aims to generate new leads. Writing a cold email is a unique exercise. You can't write to 10,000 people in the same way. You're likely to fail. This is where personalization comes in. The more personalized your email, the less your recipients will feel spammed. Your name and email address should be professional and consistent with your brand or company. Recipients are more likely to open an email from a credible source. Your email's subject line should be attention-grabbing and encourage recipients to open it. It should be short, clear, and give an overview of the email's content. Consider using relevant keywords and personalizing the subject line for each recipient.Starting Price: $20 per month -
18
TaskRobin
TaskRobin
Save emails to Notion with one click. Turn emails into Notion tasks to stay organized and keep track of your work. - Forward your email to our robot inbox after signing up. Give it a minute and our robot will automatically add your email to your Notion database with all your attachments and meta data - All your attachments can be saved directly to Notion. Available for download. - Choose and link a custom robot inbox to each Notion page to save emails to different databases. - BCC TaskRobin to save an outgoing email. Set up forwarding rules to auto save emails from a particular sender or with certain keywords in the subject line. - Create a filter view in Notion according to email meta data that are saved to respective columns. Managing your tasks has never been easier! - Include a line of #hashtags when you forward your emails to TaskRobin to tag and organize them in Notion. Then you can easily filter and prioritize your emails. - Paste your browser tab URL when forwardingStarting Price: $3.99/month/user -
19
Maileroo
Maileroo
At Maileroo, we provide a powerful platform for both SMTP relay and email marketing. We ensure fast, reliable email sending with real-time tracking of deliveries, clicks, opens, and bounce rates. With our free Email Verification API, dedicated IPs, and DNS Records for sender authentication, we help reduce bounced emails and improve deliverability. Our email marketing platform makes it easy to create and manage campaigns. You can personalize emails, use our drag-and-drop email templates, form builders, and flexible Contacts API. We provide real-time statistics and in-depth analytics to help you optimize your campaigns and boost engagement. We also offer seamless DNS setup, automation tools, multi-sender identities, and efficient contact management. Whether you're a small business or growing enterprise, Maileroo offers budget-friendly pricing and everything you need to scale your email marketing, making it a smart choice for businesses of all sizes.Starting Price: $10 per month (25,000 emails) -
20
HTML Email Check
HTML Email Check
HTML Email Check includes all the tools developers need to create, check and validate their HTML emails with, including instant validation results, an integrated HTML editor, layout viewer, and email sending. Validation of the HTML markup, structure, and client-specific tags. Validation of CSS formatting, inline CSS, and client-specific styling. Validation of font types, web fonts, and client-specific styling. Checking of image sources, dimensions, and attributes. Checking for working URL's, special links, and attributes. Layout and HTML structure testing on non client-specific devices. Send up to 10 test emails at a time directly to your inbox. Covering important aspects your email should include before sending. Every day is different and sometimes you need to react quickly to a certain situation or last-minute changes.Starting Price: $14.95 per month -
21
PilotMail
Netling Digital
Code awesome HTML emails and test them easily on real email clients before sending with PilotMail. PilotMail comes with a split-screen layout viewer and code editor that's designed specifically for building HTML email. Code Editor lets you code email template's HTML-Part, Text-Part and even CSS all at one place. Layout Viewer helps you in live email visualization for desktop, tablet, and mobile devices. For the best HTML e-mail delivery results, CSS should be inline. PilotMail can do it automatically every time you send a test email. That's not all. PilotMail has many other handy settings to pre-process your code and make it ready for use in production. Setup up to 10 email addresses for a test, where, each email address can represent an email client. PilotMail will send HTML email to all email addresses at once for you to find issues on live email clients.Starting Price: $3 per month -
22
Zonmaster
Zonmaster
Zonmaster helps Amazon sellers monitor, manage and automate emails, product reviews, orders and feedback. Create professional email templates with buttons, gifs and emojis. A/B test subject lines and analyze open rates. Send or exclude emails based on triggers like refunds, shipping, delivery, and feedback. Instant notification when reviews are posted. Monitor all product reviews and listings and get notified when reviews, hijacks, buy box loss, and listing changes occur.Starting Price: $6.99 per month -
23
Topalt Mail Merge
Topalt.com
There's no longer a need to hire an expensive email marketing firm to get your message across because now you will have the capability of quickly sending mass emails while retaining the individuality of each message. Your clients want to feel special, but by sending a mass email with everyone's address listed on the line can cause potential sales to plummet thanks to a receiver feeling lost in the mix. Our Outlook personalized send button will eliminate these reactions, letting your customer know the message is specifically targeted for them and that you value their attention. You work hard to produce meaningful messages that you know they want to read, so make sure that first message impression is the one that counts. The specialized Outlook plugin button acts immediately to display only the individual receiver's name when they get their mail. As an additional bonus, you as the sender can demark the receiver's name in the body of the email itself.Starting Price: $19.95 per license -
24
Everest
Validity
An email success platform like no other. Created by the most respected pioneers of email optimization and deliverability, Everest is the absolute pinnacle of email marketing–the only solution in the world that gives you full control of all critical stages of email marketing: pre-send prep and creation, in-flight optimization, and post-send monitoring. If you’re serious about reaching the top, Everest was made for you. Everest is the only email platform in the market that gives you actionable insight and intel about what’s happening with your campaigns, at all times. Ensuring your campaign is in the best shape possible is crucial to its chances of success. Enhance your campaign performance in real-time, while it’s live. Really. Improve future campaigns by building and maintaining your sender reputation. -
25
Warm Up Your Email
Warm Up Your Email
Email clients like Gmail and Outlook have intelligent algorithms that know your email-sending history. If you blast emails with a new account or ever make a mistake, their algorithms put you in spam jail. Your only chance to leave spam jail is if somehow their algorithms learn that you're not spamming anymore. Warm Up Your Email receives your email and interacts positively to help you improve your sender reputation. Configure the daily send volume, as well as the subject and the body of your email, to start sending emails at your desired volume with your desired content. Your campaign will begin, and you’ll start seeing numbers in your dashboard showing how many were sent, opened, and replied to. Start analyzing the behavior of accounts hitting the spam folder with a 10-day spam pattern report that shows how using Warm Up Your Email affects your email deliverability and if you’re getting back to the inbox over time.Starting Price: $29 per month -
26
Yandex Mail
Yandex
Protects against spam and fraud. Log into the app with your PIN and fingerprint. Put messages on a timer so you can write them in advance and send them when it's time. Yandex Mail can look like your standard email client, or any other way you want. Join multiple Yandex inboxes under one Yandex Mail account. Incoming mail is checked for viruses, and suspicious messages are sorted into the Spam folder. Add your mobile phone number and never worry about getting locked out. If you prefer to go through your mail in the evening, turn on the dark theme. It lowers screen contrast and is more comfortable on the eyes. You can also change sounds in the settings. Choose the one you like. Finally, you can swipe the screen to delete or archive your email. Customize it to your liking. If a sender attaches a picture, you see its thumbnail next to the subject of the message in the Inbox. -
27
Imitate Email
Imitate Email
Imitate Email is an end-to-end email testing platform for developers and QA teams to ensure their email flows happen at the right time and look great. Where we differ is with our embeddable web widget and SSO feature. A single line of JavaScript adds the Imitate Email widget to your application so that: - developers can test email flows inside the software they're building - testers, or clients, can see emails inside the software they're testing without needing an Imitate Email account On top of this, we provide all the features you would expect: - a web app for viewing emails - tools for checking responsiveness, link checking, spam scoring and deliverability - a fake SMTP server alongside dedicated test email address - IMAP/POP3 access for use with your favorite email client or programmatically - integration testing support with IMAP/POP3 and WebSockets - and more! Free forever for solo developers with 15 emails a day and access to all featuresStarting Price: $7/month -
28
Inbox Monster
Inbox Monster
Inbox Monster helps email teams send epic messages to every inbox. With creative rendering and deliverability tools, you can find your email rawwwr. Expert Services: Truth: You need an expert by your side. Sending email is a lot. And the rules are constantly changing. That’s why having proactive support to help you make it to the inbox is just worth it. For your sanity and bottom line. Creative Suite: Creative testing, with a glow up. We’re doing email testing a little different. There’s a new way to test out your email creative. Get previews of your emails, plus killer diagnostics to help you get closer to perfect. So you can send with confidence. Not sweaty palms. Deliverability Suite: Don’t be a spammer. Like ever. Deliver more from your email program. More emails in the inbox. More revenue from your program. More kudos from your boss. Get the new way to dig into all aspects of your email deliverability. SMS Suite: Reach the phone obsessed. (So, everyone.) Flawless -
29
Testi@
Testi@
Looking for an alternative to preview your emails? Then check our great affordable tools. You can compare features, prices, email clients on: Comparison of Email testing tools page. T@ has no API for users so infrastructure is not so much overloaded. Prices on T@ are fantastic if you can pay 20$ for "browser Testing" then why for email previews you can't pay the same prices?. Our servers has almost 1,5TB of RAM that use enterprise SSD, connected by 10G network. Mobile devices are working in "spare" models when few crash another is replacing them. Using Testi@ is like renting an expensive supercar for a few dollars, it takes almost 3 years to develop and invest a lot of money to give you affordable email screenshot tools.Starting Price: £16 per month -
30
PutsMail
Litmus
Test your HTML emails before sending them! Once you’ve run a few tests with Litmus PutsMail, check out Litmus' full email testing suite to ensure an on-brand, error-free subscriber experience. Litmus helps you get more out of your emails with the power to test and preview in 90+ email clients—including Dark Mode—in one spot. In seconds. Litmus provides the leading email optimization and collaboration solution for marketers. From Pre-send campaign development and testing to Post-send insights for future content optimization, Litmus improves marketing performance and strategy, delivering increased subscriber engagement. -
31
Yet Another Mail Merge (YAMM)
Awesome Gapps
Send mass emails with Gmail. Reach the primary inbox, not promotion tab or spam. Track results in real-time directly from Google Sheets. Don’t waste time sending individual email messages. Create and send mail merge campaigns directly from Gmail with Yet Another Mail Merge (YAMM). Create your Google Sheets with your mailing list. You can even automatically import contacts from Google Contacts. Choose an email template, create a draft, write your content and subject line, add personalization, and save it. Return to Google Sheets, open Yet Another Mail Merge, and send. You'll be able to track email open rates, clicks, replies, and bounces to know what to send next. Easily send personalized email campaigns from Gmail. Create a message in Gmail (you can use saved Gmail templates). Send and track it from a Google Sheet. Personalize subject lines, email body, links, images and attachments to make your emails as convincing as possible.Starting Price: $20 per year -
32
mailnest
MailNest
The world's easiest email testing tool. Save time, effort and money while concentrating on your application's core features. Capture all your test emails in one place. No more accidental sending of test emails to real customers. Add all your team members to collaborate easily. Check the spam score to ensure mails reach customer inbox for sure. Setup a virtual smtp server in 2 minutes. Test multiple scenarios without creating multiple email ids or clearing database. View source code of emails to check everything is perfect. Switch on error mode to emulate error scenarios. Preview all emails in a single place. Check for multiple device compatibility with a single click. Include email testing in your automation. No need for creating multiple email ids for various scenarios.Starting Price: $35 per month -
33
Mailtrap
Railsware
Mailtrap is an email delivery platform for developers and product teams, providing a flexible RESTful API and SMTP service to send emails at scale. The platform is built with a focus on high inboxing rates, fast delivery, and 24/7 technical support from deliverability experts. Mailtrap ensures 99.99% uptime with dedicated IPs, auto warm-up, and sender reputation protection. Developers can integrate quickly using SDKs for major languages (Python, Ruby, PHP, etc.) and manage high-volume sending with a customizable API. The platform provides industry-best analytics with helicopter-view dashboards to monitor key metrics and 30-day logs for easy debugging. Trusted by over 150,000 monthly active users including Yelp, PayPal, Atlassian, and Adobe.Starting Price: $15/month -
34
Sendster
Teknikforce
Elevate your email game with Sendster, a revolutionary Newsletter & Email Marketing Software. Install it on your own hosting, effortlessly import your lists and leads, and watch your email costs plummet – saving you thousands every month! Seamlessly integrate it with Amazon SES or any other preferred email sender. Sendster is not just an email marketing tool; it's a comprehensive solution. Enjoy features such as autoresponders, email campaigns, an AI writer, lead forms, a WYSIWYG email designer, a plethora of email and form templates, and more. Features of Sendster: Draft Perfect Emails With In-Built Al Writer Create Beautiful and high-impact Email Designs with WYSIWYG Designer Includes Dozens of Readymade Templates for Emails & Forms In-built Email Verification Powerful Autoresponder Email Segmentation Advanced delivery features - SMTP Round Robin, Subject & Content Spinning, URL Spinning & More. Integrations - Webhooks, Zapier & PabblyStarting Price: $67/user/year -
35
Blocks
Blocks
Blocks is an AI-powered drag-n-drop email builder. It’s a perfect choice if you want to: 1. Speed up email production 2. Craft emails without other professionals’ assistance 3. Find a cheaper alternative for email production Here’s why you’ll love Blocks: 1. Template gallery with 65+ free email templates (and growing!) No need to make emails from zero: just edit our top-notch templates to meet your business goals. 2. Compatible with every ESP that supports HTML. Seamless integrations with the most popular ESPs are soon to be added! 3. Responsive emails that look perfect on any device: desktop, mobile, or tablet, your emails are safe. 4. No coding skills needed. However, if you're a pro in coding, you can switch to the code mode: no strict coding rules. 5. AI image generation and AI writing assistant. Generate visuals, subject lines crafted with your email in mind, proofread email copy, and much more. Give Blocks a try today for free!Starting Price: $20 per month -
36
Pacomail
Leikir Web
Pacomail is a test mail server solution that allows testing email without sending them to the real users of your application. Code, preview, test, and collaborate using a development tool designed for email.Starting Price: €15/month -
37
ProDMARC
PROGIST
Attackers use spoofed emails to phish your customer’s & employee’s credentials. Hackers send forged invoices through mails to your partners & suppliers. Attackers send malicious mails containing malware like Ransomware. Attackers sell illegal goods like weapons or drugs using mail by spoofing trusted brands. DMARC is an email validation protocol built on 2 globally accepted authentication protocols namely SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail). SPF is an email authentication protocol that allows the receiving mail server to check if the sender mail server is authorized to send emails on behalf of the organization. DKIM is a public and private cryptography based authentication protocol designed to ensure that messages aren’t altered in transit between the sender & receiver mail server.Starting Price: $100 per year -
38
DRS EML to PDF Converter
DRS Softech
DRS EML to PDF Converter works perfectly to perform hassle-free EML to PDF Conversion. The EML file types are the files that store content like subject, sender, recipient, etc., of an individual email. An EML file is compatible with multiple email providers, but they are not widely supported. So, it is convenient to convert EML files into a more versatile file format. DRS EML to PDF Migrator will help you to do so. As you know that an EML file stores a single email message, it becomes hectic to save all mailbox emails as EML files. However, a PDF file can contain an entire mailbox. So, it is ideal to convert EML to PDF files. Unlike EML files, you can open a PDF file on almost all devices. Only a few emails applications support EML files. So, it becomes difficult to open or edit them. Thus, if you want to open .eml file online you need to change the file format. An EML file is susceptible to file corruption which causes data loss.Starting Price: $34 -
39
Zyntra
Zyntra
Zyntra is a disposable email platform for QA teams and test automation workflows. It helps you capture, assert, and validate email content as part of your end-to-end tests — without manual setup or flaky workarounds. Use it to: • Generate unlimited private inboxes automatically, with one line of code • Trigger real emails (OTP, password resets, invites) and read them via API or Web viewer • Prevent test emails from leaking to real users — all inboxes are private by default • Run isolated tests in CI/CD with no collisions or cleanup • Validate your entire email-based flow, just like in production (real SMTP) Zyntra works with any testing framework or language and includes an official Node.js SDK for fast integration. Ephemeral inboxes are retained for 24 hours; persistent ones for at least 7 days. Built by QA, for QA — Zyntra helps you stop babysitting test environments and focus on verifying what matters.Starting Price: $9/10000 emails/month -
40
SMTP Debug Tool
SMTP Debug Tool
Ensure flawless email communication with the SMTP Debug Tool, a completely free and secure way to diagnose SMTP connection issues. This tool connects to your SMTP server, initiates a test session, and provides a detailed log of the interaction between servers. Whether you're using popular email services like SendGrid, Google SMTP, Elastic Email, UniOne or Mailgun, this tool simplifies troubleshooting and helps resolve sending errors. With end-to-end encryption, your information remains private and secure. The tool doesn’t store any session logs or credentials, and you can further enhance security by changing your password after testing or using the optional “SMTP Blackhole” feature.Starting Price: $0 -
41
Pinpointe
Pinpointe On-Demand
Pinpointe On-Demand is an award-winning, cloud-based email marketing platform that helps high volume email senders track and stay in touch with customers through permission-based email. Purpose-built for mid-sized enterprises, high volume senders, and agencies, Pinpointe provides the largest library of mobile-friendly, pre-tested, ready-to-use HTML email templates that enables users to create engaging email campaigns. Core features include real-time site analytics and heat maps, social sharing buttons, smart segments, and powerful autoresponders.Starting Price: $42.00/month -
42
MyEcho
Lightstone Consumer
Powerful, easy-to-use survey software for the collection of the customer, employee and partner feedback and other online surveys and forms. From simple once-off surveys to tailored experience management solutions, MyEcho scales with your goals & objectives. Each respondent receives an email containing a unique link to an online survey. Customize the email message, and subject line and add your own logo. Each respondent receives an SMS containing a unique link to an online survey. Customize the message to your liking. A short survey link that can be opened and completed unlimited times. This link can either be copied and sent via your own email client, published on your website, a blog or anywhere else. Share a weblink to popular social media channels such as Facebook, Twitter and WhatsApp. QR code works the same as the web survey. Print the barcode on pamphlets, posters and more. Your respondents can access the survey by scanning the QR code with their mobile phones.Starting Price: $29 per month -
43
EmailPreviewServices
EmailPreviewServices
We are EmailPreviewServices company owned by Easy Tech Solution LLC. We offer a service with quality tools that allow us to preview email designs before they land in the recipient's inbox. Our tools also test emails for Spam and monitor Inbox status. Please note: we ONLY provide testing for real devices and email preview software. We do not use any simulators or emulators. Our all-around service offers something for everybody, so whether you are an entrepreneur, small business owner or a multi-national company - we have all the necessary tools and features for building a strong email campaign, ensuring that your emails work and convert traffic for you. Our main goal is to provide our customers with an actionable platform, by which they could quickly fix general content-viewing and email deliverability issues.Starting Price: $25 per month -
44
Minty Email Tester
MintyEmailTester.com
Minty Email Tester sends HTML email code to users' inboxes to check for rendering issues across different email providers like Gmail, Outlook, and Yahoo. Key Features: • Send test emails to multiple providers simultaneously • Save up to 10 email addresses to avoid retyping recipient lists • HTML validation checks for missing or malformed alt attributes on images • Table role validation and malformed HTML detection • Automatic CSS inlining for better email client compatibility Pricing: Free tier (5 emails/month) and Pro subscription ($9/month) for unlimited testing and advanced features.Starting Price: $9/month -
45
Link Sonar
Link Sonar
Link Sonar is AI-powered link building software built for SEO agencies, in-house SEO teams, and freelance link builders who need to scale outreach without scaling headcount. The platform consolidates the entire link building workflow into a single dashboard: boolean search-powered prospect discovery, automated contact enrichment, AI-generated personalized outreach emails, multi-step follow-up sequences, real-time backlink monitoring with instant alerts, A/B testing for subject lines and copy, and white-label client reporting. Link Sonar replaces the patchwork of spreadsheets and disconnected tools that slow most link building campaigns down. It is a modern alternative to legacy platforms like Pitchbox and BuzzStream, delivering agency-grade capabilities starting at $49/month. Start a free 14-day trial today.Starting Price: $49/month -
46
just words
just words
Maximize learning with real-time copy optimization, versioning, and no-code experimentation. Optimize every product copy with email subject and preheaders. Improve open rates with hyper-personalized subjects, save costs with mobile-friendly concise snippets, grab attention on the lock screen with sleek push alerts, and rank high in search results with the most up-to-date keywords. Generate, and edit copy variants and start testing with 1 click, with no code re-deployments. Integrate copies with AB personalized frameworks, adapt copies to users in real-time, get an objective score on generated copies, and fine-tune future iterations with experiment insights. Your brand identity protection is key for us. We warm up our algorithm with your brand and tone as a one-time setup. Further, you always have the option of reviewing every single piece of content that is shown to the user, before it is picked up for optimization. -
47
Subject7
Subject7
Subject7 enables “true” codeless automation, empowering anyone to become an automation expert. Our unified platform accelerates test authoring, reduces test maintenance, and scales in the cloud or on-prem with enterprise-grade security. Subject7 unifies testing delivering functional, regression, end-to-end, API, database, load, security, and accessibility testing in a single solution. We integrate easily into your DevOps and Agile tooling ecosystem with native plugins and open APIs. Subject7 has attained SOC2 Type II certification; our customers include highly secure enterprises and major government agencies. -
48
Ciphermail Appliance
in-put
Email encryption with CipherMail Most emails are sent in plain text. This means that anyone who has access to the data stream can read the content of the emails. This is unacceptable for most companies, institutions and organizations and may also violate applicable law. E-mail encryption ensures security and trust in communication. CipherMail is a central mail transfer agent (MTA) that works on the “store and forward” principle. Incoming e-mails, regardless of whether they are from internal or external sources, are only saved until they have been encrypted / decrypted and can be forwarded to the recipient. This happens without changing the email client and is possible in combination with any SMTP server! E-mail encryption can be done using S / MIME, PGP or in a PDF file - in principle or triggered by a trigger in the subject line. CipherMail also includes a Data Leak Prevention (DLP) module.Starting Price: $670 one-time payment -
49
MailSlurp
MailSlurp
Create unlimited private email addresses on demand in code, tests, or online. Send and receive emails and attachments and process emails with HTTP Webhooks, Zapier integrations, and team dashboards. Test user authentication, forgotten password, email verification and more for your application using real email addresses. Use REST API, developer SDKs, and Zapier integrations to receive emails in code, test user sign up flows, and save new contacts and attachments to Google Drive and more. Generate inboxes with custom domains or randomly assigned email addresses. View emails and attachments in code, tests, or using team web apps. Process text messages for real phone numbers using webhooks and REST APIs. Send and receive emails in code or tests using webhooks or waitFor function. Search and match emails. End-to-end test applications using real email addresses.Starting Price: $22.80 per month -
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Mailosaur
Mailosaur
Mailosaur lets QA and Development teams capture, test and analyze email and SMS messages using their existing test framework or language. Catch bugs before your customers do! Pinpoint defects in critical workflows, such as account activation and password resets before they get released. Mailosaur is a key addition to any reliable suite of test tools or frameworks, giving you full confidence in the most critical workflows of your application. Use a new email address for every test run, project, team member, or idea you have! Integrate the results into your existing test framework. Create phone numbers that let you perform end-to-end tests of critical workflows, such as security verification checks. Build out real-world test scenarios that perform common user actions such as following links in emails, replying to messages and triggering web beacons. Prevent internal environments from sending externally, and never email a real customer by mistake!Starting Price: $9 per month