Alternatives to Thunderbird
Compare Thunderbird alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Thunderbird in 2024. Compare features, ratings, user reviews, pricing, and more from Thunderbird competitors and alternatives in order to make an informed decision for your business.
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1
Shift
Shift Technologies Inc.
Your power browser. Shift is the first browser to merge all your web apps into one powerful window. Streamline everything you do online when you install Shift and access thousands of apps without leaving your browser. Connect all of your Gmail, Outlook, and Office 365 accounts and manage everything from one centralized window. Build out your Shift browser with apps that integrate seamlessly so you have ultra-fast access to all the tools you use to stream, shop, work, browse, and stay connected. Shift brings it all together. We don’t use the internet for a simple search anymore. Every day, we juggle apps, hundreds of tabs, and multiple accounts—but while big browsers make that feel messy, Shift makes it simple. Tired of logging in and out? Stay logged into multiple accounts within the same app so you can toggle between profiles easily. Create multiple browser workspaces that keep different kinds of tabs, bookmarks, apps, and inboxes separate. -
2
Bordio
Bordio
Bordio is a comprehensive project management software that integrates team management software, task management tools, and a project planning calendar all in one platform. It brings together everything teams need to get their work done, from setting up projects with a project planner and organizing tasks on a kanban board, to collaborating with team members using a task board. The platform provides a clear view of what needs to be done each day with its online calendar, making overwhelming to-do lists a thing of the past. With features for scheduling tasks on specific days and keeping track of progress with color-coded statuses, Bordio keeps teams focused and acts as an effective project tracker and task tracker. You can invite guests like clients or freelancers into projects at no extra cost and work together seamlessly. The inclusion of a team task planner and team tracker ensures that every member’s efforts are synchronized and visible. -
3
ONLYOFFICE
Ascensio System SIA
ONLYOFFICE Docs is a secure online office suite that comes with a vast range of professional features. Co-edit documents, sheets, presentations, fillable forms and PDF files in real-time using an AI assistant and collaborative tools: two co-editing modes (real-time and paragraph-locking), commenting, built-in chat, tracking changes, version history, document comparison, audio and video calls. It can be integrated with existing platforms, both locally and in the cloud. ONLYOFFICE DocSpace is a web-based platform for document collaboration in customizable rooms. DocSpace allows you to create collaboration rooms and custom rooms where you can assign various access permissions, enhancing the interaction with your team and external users, both locally and in the cloud. ONLYOFFICE Workspace comprises ONLYOFFICE Docs and comprehensive productivity tools: Mail, CRM, document and project management, calendar, etc., allowing you to control all business processes in one place. -
4
eM Client
eM Client
Boost your email and skyrocket your productivity with the best email client for Windows and macOS. eM Client is a fully-featured email client with a clean and easy-to-use interface. It also offers features for calendars, tasks, contacts, notes, and chat. eM Client's compatibility is unmatched. You can connect to any email service – it will work. This email client works seamlessly with Google Workspace, Office 365, Outlook, Exchange and virtually all conceivable email technologies. Integrates with Online meeting tools such as Zoom, MS Teams, Google Meet and more. eM Client enhances email communication for professionals and home users alike. It is the only email app on the market with the full support of server-side rules and search, instant message translation, "Snooze email" and “Watch for reply” features + easy to use email encryption (PGP and S/MIME). It also works perfectly with Gmail, including support for tags and signature synchronization.Starting Price: $59.95 one-time fee -
5
Noodle
Vialect
Noodle is the all-in-one enterprise platform that removes the stress of working across emails, file servers, task managers, spreadsheets, chats, meetings, etc. Teams that use their Noodle communicate better and are more productive. Your people will see where everything is, understand what everyone is working on, all while improving the company culture. Features Cloud or On-Premise Options Fully Customizable Design Build Sites in Minutes Regularly Updated With New Features Flexible Password Controls Drag and Drop Features/Post Track Views of Content Unlimited Colors/Skins Create Polls/Surveys Sync with Active Directory 11 Supported Languages Built In Block Text Editor Follow Co-Worker’s Statuses Create Custom Workflows Embed Video and Photos Easily Archive Content Video Conferencing Build E-Forms and Reports Merge Multiple Calendars Optimized For Speed All Applications Included View Personal User Statistics Personal Digital Workspace EtcStarting Price: $200 per month -
6
Claws Mail
The Claws Mail Team
Claws Mail is an email client (and news reader), based on GTK+, featuring quick response, graceful, and sophisticated interface, easy configuration, intuitive operation, abundant features, extensibility and robustness and stability. The appearance and interface are designed to be familiar to new users coming from other popular email clients, as well as experienced users. Almost all commands are accessible with the keyboard. The messages are managed in the standard MH format, which features fast access and data security. You'll be able to import your emails from almost any other email client, and export them just as easily. Lots of extra functionality, like an RSS aggregator, calendar, or laptop LED handling, are provided by extra plugins. Claws Mail is distributed under the GPL. -
7
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 -
8
Edison Mail
Edison Software
We spend most of our time in mail, often reading about innovation and productivity. Somewhere along the way, mail got lost. So, we set out to build the best mail experience in the world for mobile. Get organized with categories. The app's assistant will automatically categorize messages for you to make it easier to find. Like peanut butter and jelly, some things go together. Get alerts for flight status changes including delays, cancellations and gate changes. Monitor the price protection window on recent purchases and get notified if the price drops. Get the forecast for my upcoming trips in the assistant to help me pack. Get notified when packages are out for delivery, and view details right in the assistant. Newsletters and mailing lists you don't read and may want to unsubscribe from. Surface directions to the airport for your next flight or your hotel for quick one tap access. -
9
Microsoft Outlook
Microsoft
Connect. Organize. Get things done. Email, calendar, contacts all in one place. Work efficiently with email, calendar, contacts, tasks, and more—together in one place. Office integration lets you share attachments right from OneDrive, access contacts, and view LinkedIn profiles. Book conference rooms and track RSVPs for meetings right from your calendar. Make plans and coordinate schedules by sharing calendars and seeing when your coworkers are available. Get peace of mind with enterprise-grade security trusted by many of the world’s largest organizations. Outlook works around the clock to protect your confidential information, without getting in your way. Outlook anticipates your needs. Travel and bill payments are automatically added to your calendar, and intelligent reminders help keep you on track. Search helps you find information quickly. -
10
Mailbird
Mailbird
Mailbird is an award-winning desktop email management client for Windows 7, 8 and 10. The email client works seamlessly with any IMAP, POP3 or Exchange email provider, and is ideal for G-Suite (now Google Workspace) and Outlook users, with Mailbird for Mac coming up next. Mailbird users can manage all their email accounts from a single pane of glass, keeping personal and business emails separate, while managing them both from a unified interface. Mailbird distinctively enhances the end user experience through integrations with popular social media apps, as well as business productivity and team collaboration apps, such as Asana for task management, Google calendar, Dropbox for file sync and share, WhatsApp and Slack for instant messaging and Google Hangouts for video calling amongst others.Starting Price: $3.25/month -
11
Mailspring
Foundry 376
Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows. Multiple accounts (IMAP & Office 365), touch and gesture support, advanced shortcuts, lightning-fast search, undo send, unified inbox, read receipts, link tracking, and more, mac, windows, and linux support, themes and layouts (including dark mode), localized into 9 languages. Mailspring indexes your mail so you can use advanced, Gmail-style search queries and search message contents across all your connected accounts. Never lose an email again. Understand your audience. Send timely follow-up. Turn clicks and opens into actionable insights. Mailspring Pro is your unstoppable email sidekick for sales and business. Mailspring Pro removes the limits in the free version, so you can snooze messages, schedule reminders, and send later an unlimited number of times and conquer your inbox. Understanding your contacts and customers is the key to connecting with them.Starting Price: $8 per month -
12
Airmail
Airmail
Airmail 3 — This fully accessible mail client was designed specifically for iOS, macOS and watchOS. Email workflow is optimized with extensive customizations, custom actions and deep integration with a wide range of apps and services. Airmail is designed from the ground up to be a powerful mail client which allows you to customize it to meet your needs. Integrate your favorite apps, and create custom actions to make your life easier. Whether you're using your Mac, iPad, iPhone or even your Apple Watch, Airmail can be wherever you need. Add as many email accounts of any type your like to Airmail. (Gmail, GSuite, iCloud Mail, Exchange, Office 365, Microsoft Outlook, IMAP and POP3). See all of the email in all of your inboxes at once with the unified inbox feature. You can even exclude accounts from this view if you want to. When you just want to see the important emails, the smart inbox is here for you.Starting Price: $2.99 per month -
13
Hexamail Flow
Hexamail
Hexamail Flow is a full email client, with calendaring, tasks and contacts. It operates with Office 365, Gmail, including modern authentication methods (OAUTH) works with Exchange on premises and all IMAP and POP3 servers. The GDPR data protection module offers email and office document redaction features including full PST file import, eml and msg file import, office document import and printing output or PDF generation of redacted content.Starting Price: Free -
14
Hiri
Hiri
An incredibly easy way to manage your inbox. Built for the Microsoft email ecosystem. We also support: outlook.com, hotmail.com, live.com and msn.com. Email doesn’t have to be ugly. A cluttered inbox is like a cluttered desk - it makes it difficult to get in the right headspace. We’ve used the UX principle of progressive disclosure throughout Hiri so you only see what you need when you need it. Good design is at the heart of what we do. For example, regardless of what resolution or what size monitor you use the center pane in Hiri will always remain the same width. This is because the optimum readable length of a sentence is about 96 characters. Any longer and it can be difficult to find the beginning of the next sentence. Any shorter and your eyes need to work harder, causing fatigue.Starting Price: $39 per year -
15
Postbox
Postbox
All your email accounts in one place, innovative features, easy organization, fast search, and a beautiful UI. Fast, sleek and powerful, Postbox is guaranteed to give you email superpowers. Let our email organizational features declutter your inbox and your mind. Pixel-perfect, intuitive interfaces that act like real Mac and Windows apps, not webpage experiments. Build your own theme using our powerful Theme Editor, or add a professionally-designed Theme Pack that you can customize any way you like.Starting Price: $49 per user lifetime license -
16
Roundcube
Roundcube
Browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an email client, including MIME support, address book, folder manipulation, message searching and spell checking. Drag-&-drop message management. Full featured address book with groups and LDAP connectors. Canned response templates. Responsive skin (multi-device support).There are thousands of services that make use of Roundcube to provide webmail to millions of users. We love to see our application in so many hands and believe it is essential for society at large to have Open Source software available for a crucial task such as communication. Below is a list of services that not only use, but actively contribute to Roundcube and where usage of those services helps to improve and further develop Roundcube webmail. These are the services that make it possible for us to continue improving our software and to make it freely available for everybody. -
17
Superhuman
Superhuman
We rebuilt the inbox from the ground up to make you brilliant at what you do. We specifically designed it for those of you who want the best. Superhuman is gorgeous. Blazingly fast. And comes with advanced features that make you feel superhuman. A.I. Triage. Undo Send. Insights from social networks. Follow-up Reminders, Scheduled Messages, and Read Statuses. To name but a few. Superhuman is so fast, delightful, and intelligent — you'll feel like you have superpowers. We set out to design the most beautiful email experience ever made. We repeatedly pored over every pixel. We meticulously crafted every interaction. Everything, from the iconography to the typography, has been relentlessly refined. On average, we all spend 3 hours a day in email. When you use something for that long, it should be subtle, delightful, and gorgeous.Starting Price: $30 per user per month -
18
Sylpheed
Sylpheed
Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client. Sylpheed provides intuitive user-interface. Sylpheed is also designed for keyboard-oriented operation, so Sylpheed can be widely used from beginners to power users. Sylpheed runs on many systems such as Windows, Linux, BSD, Mac OS X and other Unix-like systems. Sylpheed uses GTK+ GUI toolkit. The newest version of Sylpheed works with GTK+ 2.4 or later (2.6 or later is recommended). Sylpheed is a free software distributed under the GNU GPL (the library part is GNU LGPL). You can freely use, modify and redistribute it under the license. Sylpheed adopts 3-paned display similar to the popular e-mail clients for Windows such as Outlook Express and Becky. So it is easier to use it on the first time. The user-interface is constantly improved, and Sylpheed achieves attentive, comfortable operationality. -
19
Spark Mail
Readdle
Love your email again. The best personal email client. Revolutionary email for teams. Intelligent email prioritization, noise reduction, and the most advanced email tools at your disposal. Reach Inbox Zero for the first time. Spark intelligently prioritizes your email. It bubbles important messages from real people to the top. Pin and reply to those, and batch archive the rest. Spark reduces the noise by only notifying you about emails from people that you know. Reclaim your space for creativity and get peace of mind. We do our best work as part of a team. Spark allows you to create, discuss, and share email with your colleagues. Take your team collaboration to the next level. Collaborate with your teammates using real-time editor to compose professional emails. Invite teammates to discuss specific email and threads. Ask questions, get answers, and keep everyone in the loop. Save time when you regularly send similar email messages to people.Starting Price: $6.39 per user, per month -
20
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 -
21
Vivaldi Mail
Vivaldi Technologies
A powerful email client built right into your browser. Vivaldi Mail makes it easy to manage emails from multiple accounts, mailing lists and feeds in a unified inbox. A database of all your messages, labels, filters, searches is maintained by Vivaldi and the bedrock of our powerful email client. Mail from all of your accounts is indexed, so it’s searchable offline. Having a mail client built into your browser just makes sense. Compose messages in new tabs, keep multiple messages open and manage them with ease using Vivaldi’s extensive tab features. There are two counters next to folders in Vivaldi Mail. Brand new mails that have never been seen before are called Unseen. Emails that you have seen but not dealt with are Unread. Use customizable Keyboard Shortcuts to work through email faster. Use the Back/Forward buttons to jump in through “history” and views while you work.Starting Price: Free -
22
SeaMonkey
SeaMonkey
The SeaMonkey project is a community effort to develop the SeaMonkey Internet Application Suite (see below). Such a software suite was previously made popular by Netscape and Mozilla, and the SeaMonkey project continues to develop and deliver high-quality updates to this concept. Containing an Internet browser, email & newsgroup client with an included web feed reader, HTML editor, IRC chat and web development tools, SeaMonkey is sure to appeal to advanced users, web developers and corporate users. Under the hood, SeaMonkey uses much of the same Mozilla Firefox source code which powers such products as Thunderbird. Legal backing is provided by the SeaMonkey Association (SeaMonkey e.V.). The Internet browser at the core of the SeaMonkey Internet Application Suite uses the same rendering engine and application platform as Mozilla Firefox, with popular features like tabbed browsing, feed detection, popup blocking, smart location bar, find as you type and a lot of other functionality. -
23
BlackBerry Hub+
BlackBerry
Up your game with BlackBerry apps on your Android phone. Give your phone a productivity boost from BlackBerry®. Whether it’s integrating all your messages and social notifications into one place or giving you a really smart Calendar, BlackBerry makes sure doing stuff on your Android™ phone is effortless. Keep organized with BlackBerry® Hub+ Inbox. Inbox consolidates all your email, calendar events and social notifications from apps like Facebook, WeChat, Twitter, LinkedIn and WhatsApp in one unified app. You can also sync your BlackBerry Hub+ Inbox with Wear OS by Google devices to receive notifications and respond directly from your watch. BlackBerry® Hub+ Calendar allows you to schedule appointments and create events with ease. Use the Agenda, Day, Week, or Month view to quickly glance at your events and respond to meeting invitations directly from the BlackBerry Hub+ Inbox. You can also call into meetings directly from your event reminder with just one tap. -
24
Fastmail
Fastmail
Email you can feel good about. features you’ll love. You get 100% of our efforts and expert support when you need it. Email holds the details of your life. Here, your story is protected, not monetized. Thoughtful and speedy email, calendars, and contacts; all ad-free. Built with you in mind, you’ll love our intelligent features. Internet companies use your data as a way to get rich. But it doesn’t have to be this way. Take back your privacy and get a better email experience. With your email on your side, you spend more time doing what you love. Use Fastmail in your web browser, on mobile devices, and on desktop apps (Outlook, Thunderbird, Mac Mail). Breeze through your day with email, calendars, and contacts all in one app. Seamlessly import your data. Keep your life organized with a full-featured inbox. Bring all your calendars together. Share with your favorite people. Use your custom domain, and own your email address forever.Starting Price: $3 per user per month -
25
Canary Mail
Canary Mail
Email, meet AI. Canary can write your emails, prioritize what needs attention, silence spam & much more. Say hello to your Inbox Copilot!Starting Price: $20/month -
26
Google Workspace
Google
G Suite just got better — introducing Google Workspace (formerly G Suite). Everything you need to get anything done, now in one place. An integrated workspace that’s simple to use, Google Workspace lets you spend less time managing your work and more time actually doing it. Address what’s important and let Google handle the rest with best-in-class AI and search technology that helps you work smarter. Work from anywhere, on any device – even offline – with tools to help you integrate, customize, and extend Google Workspace to meet your team’s unique needs. Similar to G Suite, all Google Workspace plans provide a custom email for your business and includes collaboration tools like Gmail, Calendar, Meet, Chat, Drive, Docs, Sheets, Slides, Forms, Sites, and more. We have a variety of plans that are designed to meet your unique business needs. Discover which plan best fits your business needs on our plans and pricing page.Starting Price: $6 per user per month -
27
Developermail
Developermail
You should be in full control over your mailbox. Developermail provides mailboxes that can be configured as if they were self-hosted. Including things like forwards, aliases, catchalls and sieve filters. So start thinking about optimizing your mailbox and forget about time consuming server adminstration. Every mailbox comes with calendars, an address book and reminders. Developermail integrates perfectly into your daily developer life. All configuration is done in YAML files which are stored in your private git repository on our servers. Simply "git clone" and "git push" to update configration settings. We value security and privacy like you do. Developermail uses battle tested encryption technologies in order to keep your data safe. We will never sell your private data nor share it with third-parties for marketing purposes. -
28
Microsoft Exchange
Microsoft
Work smarter with business-class email and calendaring. Exchange helps you collaborate on your critical documents and gives you a focused inbox that prioritizes important messages and adapts to your work style, so you can get more done–faster. Get access to a more personalized inbox with helpful features and a smarter, more organized way to view and interact with email. Search enhancements give you faster and more complete results. With Add-ins, get powerful customization and extensibility, which connect you to modern services and internal line-of-business applications. Organize your time with a calendaring system that goes beyond basic scheduling of appointments and commitments. Automatically capture events from email such as flights and hotel reservations, and get suggestions about where to meet based on your location. Microsoft Exchange Online offers a hosted email service for business. Exchange Online helps protect your information with advanced capabilities. -
29
grommunio
grommunio
grommunio efficiently summarizes all requirements of modern, digital communication and collaboration. This includes the device and operating system independent management of sensitive data such as e-mail, contacts, calendar, chat, video conference, file sharing and much more – in real time. With open source technology based on Linux, grommunio is scalable and meets the highest security requirements. Thanks to its advanced architecture, grommunio can be integrated into existing systems without great effort. Increase your efficiency by managing emails, contacts, calendars, tasks and much more with just one platform. With integrated enterprise-grade Active Sync, your data is available on all devices in real time. Invite directly from your calendar to online conferences with grommunio Meet, share files of all kinds in grommunio files and talk to your employees at the same time via grommunio chat.Starting Price: €1.99 per mailbox per month -
30
Eventable
Eventable
Customers are inundated with marketing messages from multiple channels. The demand for messaging that’s timely, helpful and personalized is growing. Across the board, traditional mediums like email and digital ads are becoming less effective. As time on mobile devices increases, customers’ time with media has become increasingly fragmented. Use Eventable to stay top-of-mind. Ensure high attendance to your next event, whether it’s a conference, webinar, or game day. Our customizable “Add to Calendar” buttons can be easily embedded in all your marketing channels. These enable anyone to add your events to calendar, on any device. Segment your audience by location, behavior, or interests to send ongoing, relevant events directly to their calendars. Customize your reminders and the exact time they pop up on your customers’ devices. Monitor activity inside your customers’ calendars. Our industry-leading SmartEventsTM Analytics tracks impressions, link clicks, location, etc. -
31
OneCal
OneCal
OneCal is a productivity tool that helps professionals synchronize their meetings across multiple calendars in real time. Upon synchronizing your calendars, you'll never have to deal with meeting conflicts again. 🚀 Main Features: 🕙 Real-Time Updates: Your calendars are automatically updated in real-time as the original events change or new events are added. 🔄 Multi-Way Syncs: Choose from one-way or multi-way syncs between 2 or more calendars. Set up once and forget. ⚙️ Fully Configurable: You have all the necessary tools to easily configure exactly what you want to sync over. No more, no less. 🔑 Privacy Focused: We only store the data we absolutely need to perform the sync. No data about your events is stored in our systems. 🎳 Team Plans: We offer team plans for your whole organization to start using OneCal and sync their calendars. 🌠 Simple Interface: No need for extensive doc pages. Everything is clearly explained and defaults are provided out of the box.Starting Price: $3.70/user/month -
32
Agendex
Agendex
Marketing events, training, webinars, whatever it is, easily manage your event calendars in Outlook and then publish them for everyone to see! Bring people, rooms, and resources together with our user-friendly, powerful free/busy search, it even works across multiple Exchange/M365 systems! Stop the email back-and-forth when trying to book meetings with external recipients; just send them your MyAvailability link and let them book what’s convenient for them! Smart, secure calendar sharing and booking for your entire organization. Agendex allows you to share events publicly so that anyone can view them and click to join them on the spot. You can provide a calendar link in emails or on your website, or even embed calendars on your website. Managed directly from Outlook, your everyday tool! These calendars can provide information about marketing events, webinars, training sessions, etc. Visitors can view information about any event and even register if you provide a registration link.Starting Price: $99 per month -
33
Shortwave
Shortwave
Email connected the world, but it lost its magic along the way. We believe it deserves better, and we're on a mission to bring email up to speed (literally) with modern messaging apps. Email should prioritize people, not advertising. Getting through your inbox shouldn't require busywork, and sending an email should be as fast as typing a text message. That's why we're building Shortwave: to recapture the magic of email with a beautifully designed product that works for everyone. Create channels to keep your team on-topic and make past conversations searchable. Instant delivery, typing indicators, and emoji reactions make conversations with other Shortwave users come to life. Use @-mentions to push notify the right people when you need them to join in. Shortwave connects to your existing Gmail account. Sign in today to get your inbox organized in minutes. You'll have the option to invite your teammates later. -
34
Pingly
Pingly
Pingly is a beautiful, modern email service built for today's internet. Enjoy email again with a modern and easy to use interface. Pingly isn’t just an email client, it’s also a full-featured email provider that hosts email on your domain. hat with your team using Channels. Pingly integrates email and team chat into a single interface. Save time and stay focused without having to switch between different apps. Pingly is your communication hub Message or talk seamlessly with anyone over Email, Text & Voice from a single unified platform. Pingly brings email and team chat into one place so you can stay focused and get work done. Whether for your business or side-project, Pingly is built for organizations of all sizes ranging from solo entrepreneurs to large teams. At its core, Pingly is a modern, full-featured email service built for today's internet. Setup email on your domain with Pingly in minutes and have your team collaborating together in no time.Starting Price: $5 per user per month -
35
Proton Calendar
Proton AG
Your calendar is a record of your life. Proton Calendar helps keep it private. Proton Calendar automatically secures all your events with end-to-end encryption. Events received from people who use other calendars are secured with zero-knowledge encryption. In both cases, event details, including the title, description, location, and people invited, are encrypted so not even we can see them. Proton Calendar makes staying on top of your schedule simple while keeping your information secure. Proton Calendar was built by the team behind Proton Mail, the world’s largest encrypted email service. Over 50 million people and some of the world’s largest organizations have signed up with Proton. Proton Calendar comes with a Proton Mail email address that you can use to securely send event invites. You can also add events to Proton Calendar directly from your Proton Mail inbox.Starting Price: Free -
36
Kolab Now
Apheleia IT AG
Secure and private email, calendars and more. 100% Free & Open Source Software (FOSS). Open standards and formats used for all storage and communication. No vendor lock-in. All data stored under Swiss jurisdiction. User data never transmitted to any third party without explicit consent. GDPR, HIPPA and PCI compliant. Built secure from the ground up. Supports perfect forward secrecy (PFS). End-to-end encryption available. No back doors. Our documentation contains answers to most frequently asked questions and much more. Are you looking for an instant answer to your question or a quick solution for your problem, our Knowledgebase is where you will likely find it. If you can’t find the answer in our documentation, you can always contact support.Starting Price: $9.90 per month -
37
EssentialPIM
Astonsoft Ltd.
EssentialPIM is the award-winning email client and complete information management solution. It handles all your email messages, appointments, contacts, tasks, notes and password entries with easy-to-use, intuitive tools.Starting Price: $39.95 -
38
Kin Calendar
Kin Calendar
Kin.today provides you with the perfect seamless calendar experience you’ve always needed: the Kin calendar core hosted on an incredible infrastructure. You don’t need to worry about anything, we’ve got you covered. Just relax, check your Kin and focus on living your life. We could have continued a long beta or raised money without any business plan, but it didn’t feel right: at some point it would have meant compromises that we didn’t want to make. February and March are on us so that you can try Kin.today and enjoy it as much as you want (though we still have a huge waitlist, we’ll release more invites every week). Then we’ll move on to the paid subscription model. Other types of subscriptions are available (free for contributors, sponsored features), feel free to drop us an email for more details.Starting Price: €2 per month -
39
Aqua Mail
MobiSystems
The most customizable email client for Android. Over 300 settings for full customization. Sync your Exchange contacts and calendar. Format emails with our rich text editor. Rest your eyes with our dark theme. -
40
GroupWise
OpenText
GroupWise gives users a dynamic, flexible interface that’s intuitive and easily configured to conform to the organization’s requirements. GroupWise runs on cutting-edge data center technology providing modern email, calendaring, and contact management functionality. Create, view, and manage your tasks, appointments, and reminders via the GroupWise task management system. GroupWise provides convenient and centralized access to your contacts, groups, organizations and resources. Secure messaging gateway provides zero-hour antivirus and anti-spam protection on-premises or in the cloud. Bad things happen, but your email and collaboration data can still be safe and sound. Protect against data loss with enterprise-grade archiving. GroupWise provides robust messaging, calendaring, task management, and contact management with a web-based, on-the-go administrative dashboard. -
41
Proton Mail
Proton AG
Proton Mail is incorporated in Switzerland and all our servers are located in Switzerland. This means all user data is protected by strict Swiss privacy laws. All emails are secured automatically with end-to-end encryption. This means even we cannot decrypt and read your emails. As a result, your encrypted emails cannot be shared with third parties. No personal information is required to create your secure email account. By default, we do not keep any IP logs which can be linked to your anonymous email account. Your privacy comes first. We believe email privacy should be available to all. That's why our code is open source and basic Proton Mail accounts are always free. You can support the project by donating or upgrading to a paid account. Proton Mail can be used on any device without software install. Proton Mail Business allows you to keep your business email address. Send and receive encrypted emails both inside and outside of your organisation.Starting Price: $6.25 per user per month -
42
Amazon WorkMail
Amazon
Amazon WorkMail is a secure, managed business email and calendar service with support for existing desktop and mobile email client applications. Amazon WorkMail gives users the ability to seamlessly access their email, contacts, and calendars using the client application of their choice, including Microsoft Outlook, native iOS and Android email applications, any client application supporting the IMAP protocol, or directly through a web browser. You can integrate Amazon WorkMail with your existing corporate directory, use email journaling to meet compliance requirements, and control both the keys that encrypt your data and the location in which your data is stored. You can also set up interoperability with Microsoft Exchange Server, and programmatically manage users, groups, and resources using the Amazon WorkMail SDK. Amazon WorkMail features simple, low, monthly per-user pricing and costs $4 per user per month which includes 50GB of storage per user.Starting Price: $4 per user month -
43
Zimbra
Synacor
Zimbra 9 : Extensibility for Collaboration Superheroes! Users move seamlessly between desktop, mobile and tablet browsers with a consistent email and collaboration experience. Designed for extensibility and features best- in-class, out-of-the-box integrations with Slack, Dropbox and Zoom, with many more underway. Zimlet framework and APIs let you customize Zimbra to meet your specific requirements. Zimbra’s dependable server infrastructure for the security, privacy and data sovereignty Zimbra customers expect. Expect an easy upgrade process moving to Zimbra 9 — with no data migration. Zimbra 9's modern, responsive UI is built on Zimbra's dependable server infrastructure for the security, privacy and data sovereignty you expect from Zimbra. Unlike competitors with closed platforms, Zimbra 9 is flexible and extensible. Break free from Microsoft and Google and integrate with the 3rd party collaboration services you use today—Slack, Zoom, Dropbox and more.Starting Price: Varies -
44
Gmail
Google
Get more done with Gmail. Now more secure, smarter and easier to use—helping you save time and do more with your inbox. See what’s new at a glance, and decide what you want to read and respond to. Get nudges that remind you to follow up and respond to messages, so that nothing slips through the cracks. View attachments, RSVP to events, snooze messages and more without opening any emails. Gmail blocks 99.9% of dangerous emails before they reach you. If we think something seems phish-y, you’ll get a warning.Starting Price: $0 -
45
BlueMail
Blix
BlueMail by Blix a free, beautifully designed, universal email app, capable of managing an unlimited number of mail accounts from various providers, allowing for smart push notifications and group emailing while enabling personalization across multiple email accounts. The BlueMail app connects directly to your mail server and is the perfect replacement for your stock email app. With a wide range of visual and technical customizations, swipe actions and menus, action bars and buttons, colors and themes – BlueMail delivers powerful capabilities for your Team. Whether you go Pink or Blue. Go BlueMail. Available on Windows, Mac, Linux, Android, iOS, and Amazon. With the people-centric mailbox, you can focus your attention on emails from only people at the flip of a switch by using People Mode. BlueMail’s navigation picker helps you access any account: IMAP, Exchange or POP3 in a breeze. Each account can be identified by a service provider avatar.Starting Price: $5.99 per user per month -
46
AddEvent
AddEvent
You have events and calendars that you want to share with your customers – that’s why you’re here. Easily create those events right in the dashboard or import them from external calendars. As you add events, you’ll be able to see them clearly laid out in the dashboard calendar. When you’re ready, go ahead and share your events with your users one by one, or share an entire calendar of events all at once! Embed a beautiful "Add to calendar" button or calendar on your website, copy and paste "Add to Calendar" links into your emails (zero coding knowledge required) or share a custom event landing page with your users. The comprehensive calendar solution you never knew you needed. CalendarX is an embeddable calendar, a subscription calendar, and a data collection service all rolled into one.Starting Price: $19 per month -
47
Calendar
Calendar
With Calendar Contacts, you can easily manage and track connections as well as send meeting invites, introduces associates, and find a time on your calendar to spend with friends. Whether it's lunch meeting with a colleague, a catch-up over coffee with a friend, or an upcoming conference call with a client, you can use Calendar Contacts to spend event creation. Inviting guests only takes seconds now that your contacts are integrated with your calendar. Calendar will continue to evolve as your needs and behaviors change to provide a suite of tools. As your organization grows, it becomes harder to manage processes. When it comes to your scheduling, we'd wager it hasn't been updated in years. Calendar intelligently categorizes project meetings to figure out the relationships between your plans and the people in your meetings.Starting Price: $6 per user per month -
48
Google Calendar
Google
Make the most of every day. The new Google Calendar app helps you spend less time managing your schedule and more time enjoying it. A Schedule with a View. Schedule View brings your schedule to life and makes it easy to see what's ahead with images and maps. Everything you need. Various views of your day, week and month, invitations, web calendar and much more. Backup everything. Your events are always saved on the Web. If you lose your phone, you don't lose your address book. Different ways to view your calendar - Quickly switch between month, week, and day views. Events from Gmail - Flight, hotel, concert, restaurant reservations, and more are added to your calendar automatically. Tasks - Create, manage, and view your tasks alongside your events in Calendar. Video conferencing - Easily add video conferencing to calendar events. Quick event creation - Smart suggestions for event titles, places, and people save you time when creating events.Starting Price: $0 -
49
Keep&Share
Keep&Share
The easiest and most customizable online calendar that you can access anywhere, anytime. Our shareable group calendars make office communication simple & secure. Plus it's easy to share with anyone! With Keep&Share calendars you can add images, colors, event tags, notes, reminders, notifications, attach files, to do lists, links, and more. You can share anything in your account with anyone on any device, whether they’re part of your team or not. This makes it easy to coordinate with clients, contractors, and anyone else you need for your business. Use custom colors and event tags to group events by team member, location, job, and more. Office managers can even use event tags to filter calendars for only the events that you, your field crews, or office staff want to see. Never miss another deadline — set up automatic email and text reminders for any event or task or your calendar. You can send reminders to yourself any anyone on your team.Starting Price: $9 per month -
50
Front
Front
Front is a customer communication hub that surrounds every high-stakes conversation with team collaboration capabilities and contextual data to ensure responses are always fast, accurate, and deeply personalized. Front’s modern interface is inspired by email clients, which team members love because it’s familiar and easy to use. Behind the scenes, powerful automation capabilities eliminate manual workflows across systems, and detailed analytics make it easy to improve team performance and the health of customer relationships. Learn more at front.comStarting Price: $19.00/month/user