Best Email Software

Email, is defined as the transmission of electronic mail/messages from one internet user to another. Email was one of the first uses of the internet and is still the most popular use; a large percentage of the total traffic over the internet is email. Email can be exchanged between lists of people as well as one individual. Features include address books, mailing lists, file sharing, folders, and more. Some email systems are confined to a single (internal) computer system/network but others have gateways to other (external) computer systems.

To qualify for inclusion in the Email category, a product must:

  • Have an inbox where messages can be received, searched, sorted, and managed
  • Host filters for the inbox
  • Allow the transmission of both text and attachments
  • Archive messages
  • Have address book or contact list features
  • Alert user of delivered messages

Email Software Grid® Overview

The best Email Software products are determined by customer satisfaction (based on user reviews) and market presence (based on products’ scale, focus, and influence) and placed into four categories on the Grid®:
G2 Crowd Grid® for Email
High Performers
Market Presence
Compare Email Software
    Results: 46

    Star Rating

    Email reviews by real, verified users. Find unbiased ratings on user satisfaction, features, and price based on the most reviews available anywhere.

    Get custom email ( and more. 30GB of inbox storage Compatible with Microsoft Outlook and other email clients Ad-free, 24/7 support and more

    Microsoft Outlook 2010, the premium business and personal e-mail management tool and calendar software to help you stay in touch.

    Multiple Domains Zoho Mail offers extensive domain management options for businesses. You can register a new domain, manage multiple domains and easily enable mail hosting for an already owned domain. Extensive Control Panel The powerful admin control panel with its simple & robust interface gives administrators a complete control on the functions of Zoho Mail like email restriction policies, domain management, group management and more. Unlimited Aliases & Groups Enterprise admins can create multiple aliases for corporate users which lets them change the 'From' address in emails to blend with the message & recipient. Organize email accounts into groups to easily exchange and share messages among users. Email Policies Block emails based on IP Address, domain and subject content for the whole organization, control incoming/outgoing mails for corporate users, manage spam blacklists/white lists. Be in complete control as an Administrator. Easy Migration Migration to Zoho hosted mail is a breeze. You can have our ever-ready support experts walk you through the process or download the self-migration tool. MS Exchange PST based transitions are especially a zap! Powerful Search & Filters Instantly snatch evasive messages based on your criteria & view results in separate tabs. Make specific emails stand out in the crowd. Filter emails, tag them with labels & flags and directly move them to specific folders. Folders & Labels Organize your emails in the familiar tried and tested folder structure and also tag them with labels customized for your business. Set your own label colors and never miss out on messages that scream "Attention!". Instant Chat This built-in instant chat allows your corporate community to quickly come together to discuss important topics and make decisions faster. Best of all, it runs entirely on your browser as a non-distracting sleek bar at the bottom. Calendar, Tasks & Notes Your corporate users can keep track of important tasks, share calendars, take notes, et al making collaboration smooth & effective. Your users are desktop savvy? No worries. Syncing is seamless with popular desktop clients. Multiple Email Accounts Why not have you access all your other favorite email accounts from one place? You can configure other POP accounts in Zoho Mail, each of them displayed as an exclusive module with a single click. Isn't that actually cool?

    Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

    Yahoo! Mail is a web and cloud-based messaging solution that allows you to stay connected to your email with one-tap access to your inbox, multiple Yahoo account support, and instant email alerts from any device.

    End-to-End encrypted email service

    Mail makes it easy to manage all your email from a single, ad-free inbox. It features powerful search capabilities. Supports Gmail, MS Exchange, and others.

    Hiver helps you manage customer support and sales right from your Gmail. With Hiver, teams can collaborate on Shared email accounts like support@ or sales@ without having to leave their Gmail accounts. Hiver works like a full-fledged help desk, built right into Gmail. It gives you everything you need to do outstanding customer support, without any of the complexities and feature overload that come with other help desk products. Hiver is used by thousands of companies globally and is one of the most loved products built for Gmail and G Suite.

    Microsoft Exchange Online provides hosted email, calendar and contacts on your PC, phone and web browser.

    A mobile device management and collaboration suite that gives your employees safe access to enterprise email, calendar, contacts, and intranet.

    Zimbra is the leading provider of open source email collaboration software in the world. Zimbra provides governments, service providers, educational institutions and small/midsize enterprises with a low cost and customizable platform to securely exchange xemail, message, calendar, contact, file and task information from desktops, laptops and mobile devices.

    Shift makes it fast, easy and beautiful to navigate between multiple Gmail, Calendar, Drive, and App accounts, with just one click. With support for Gmail, Google Inbox, Outlook and Office 365, for all platforms (Windows, Mac, and Linux included), productivity is at your finger tips. You can stay up-to-date on everything with custom desktop notifications, and leverage the power of Google Services, cross-account Unified Search, Boomerang, Grammarly all in one place. Shift is here to help you get sh*t done!

    Mimecast Email Continuity delivers always-on, seamless email availability through automatic service failover and failback in near real-time during an email outage.

    Amazon WorkMail is a secure, managed business email and calendar service with support for existing desktop and mobile email clients it gives users the ability to seamlessly access email, contacts, and calendars using Microsoft Outlook, web browser, or native iOS and Android email applications.

    * Mashable: The 12 best apps of 2017 * Product Hunt: Mobile App of the Year * Macrumors: Best iOS apps of 2017 * TechCrunch: “A high-end Gmail replacement” * Fast Company: “This email app uses AI to keep your inbox under control” * Lifehacker: “The magic really comes from the app’s built-in digital assistant” * VICE: “Astro separates itself in one, major way: artificial intelligence” WHY ASTRO • Modern, intelligent features: Snooze, Unsubscribe, Send Later, Email Open Tracking, Priority Inbox, Unified Inbox, Calendar, and more, for Gmail and Office 365 email accounts • Astrobot: AI-powered email assistant that highlights important messages and questions, unsubscribes you from emails, and responds to hundreds of commands to help you stay on top of your inbox and calendar • Priority Inbox: Know which emails are most important with a focused inbox, powered by AI • Calendar: View and manage your calendar directly from the Astro app, including an agenda view with Snoozed emails, scheduled emails, and reminders • Slack Integration: Easily work across Slack and email. In Slack, read and respond to emails. In Astro, search for Slack messages and share emails to Slack channels • Astrobot Voice & Amazon Alexa Skill: Read, manage, and reply to emails hands-free by talking to Astrobot, directly from the Astro app or from your Amazon Echo AI-POWERED EMAIL ASSISTANT • Ask Astrobot: Responds to hundreds of natural language commands to manage, clean up, and search your inbox, add events to your calendar, set reminders, and learn how to use Astro • Insights: Unsubscribe and archive suggestions for messages that can skip your inbox • Reminders: Automated reminders to follow up on important emails, questions, tracked emails, time-specific requests and @mentions from other Astro users • VIPs: AI-powered contact list management, so you always know when a priority email arrives • Voice Commands: Manage your inbox by talking to Astrobot directly from the app • Daily & Weekly Update Emails: Insights that help you clean up your inbox and make it easier to know what to follow up on SMARTER INBOX MANAGEMENT • Priority & Other Inbox: Astro sorts your emails using artificial intelligence • Smart Notifications: Eliminate distractions by getting notified only when an email is important • Snooze: Swipe to read or respond to an email at a specific time or when you get back to your Mac • Email Open & Reply Tracking: Get notified when a recipient opens an email or get a reminder if you haven’t heard back on time • Send Later: Schedule your emails to be sent at exactly the right time CALENDAR • Unified Inbox & Calendar: Streamline your workflow and save time by viewing and managing your Gmail and Office 365 email accounts and calendars all in one place • Calendar Assistant: Add simple events using natural language • Complete View of Today’s To-Dos: Calendar includes events not only from Gmail and/or Office 365 accounts, but also Snoozed or scheduled emails and reminders, so you get a complete view of your day • Customizable Calendar Views: Choose which calendars and email accounts to display ADDITIONAL FEATURES • Customizable swipes • Fast search • Folders and Favorites • Email aliases • Signatures • Attachments - Dropbox, Box, Google Drive, Quip, iCloud • Rich text and emojis • iOS 11 support • Support for Gmail and Office 365

    Domino has always been and will continue to be the essential application platform that businesses use to solve complex problems, and get work done quickly and anywhere by anyone. Advantages to highlight: 1. Rapid application development—we were there at the beginning of “low-code app dev” space to enable tech savvy business users and IT to get work done faster. 2. Enterprise grade platform—secure and scalable for building workflow and collaboration-centric business processes using the world’s first NoSQL document database. 3. Lowest Total Cost of Ownership—proven low administrative overhead and easy integration with enterprise ecosystems such as Microsoft. More product details: Reduce costs, raise productivity Use less power, memory, storage, network bandwidth and fewer servers. Reduce administration with automated installations, policies and monitoring that free staff to focus on higher value tasks. Boost performance, availability Achieve and maintain high performance and availability with advanced clustering, replication, server fault recovery and automated diagnostic tools. Help drive business results Enable a range of workflow-driven and people-oriented applications that help business operations deliver improved outcomes. Protect business assets Control access, protect information and help ensure document authenticity. Simplify administration Ease administration with the included Database Management Tool, NetWare Directory Services Monitor for UNIX, Quality of Service probe, Simplified Notes ID management through SAML and Single Sign-On. Improve security Secure your system with included Secure Hash Algorithm 2 (SHA) support for encryption and Transport Layer Security (TLS) delivered by IBM and OAuth credential store to support embedded experiences. Product features: • Built for business-focused, collaborative applications • Advanced administration, management, monitoring and tuning • Compression and single-copy attachment • Flexible access and deployment, including mobile • Critical security standards • Integration with existing IBM and third-party applications

    Mailbird is an email management app that integrates with a lot of popular Task-, Calendar-, Messaging- and Video Calling Apps. It unifies all your online communications in one intuitive and beautiful desktop app. Multiple Account management is a breeze using Mailbird.

    Hosted Email Filters, Protection and Archiving

    SaneBox is like a super-smart assistant who’s been with you for years and knows what’s important to you. It moves unimportant emails from the inbox into a new folder and summarizes them in a digest, where you can quickly bulk-process them. An average SaneBox customer saves 12+ hours/month. Additional features: SaneBlackHole - Instantly unsubscribe from annoying marketers, mailing lists and newsletters SaneReminders - Get a reminder if someone doesn’t respond to you SaneSnooze - Snooze non-urgent emails SaneAttachments - Automatically upload attachments to Dropbox, Evernote, Box, etc. ...and more features to enhance your existing email setup With glowing reviews from TechCrunch, Forbes, The New York Times and emailers everywhere, you can rest assured that you will fall in love with email again. And it’s risk free—cancel and your email returns to the way it was.

    Discover how IBM Verse offers business email with analytics and collaboration to help you have a more productive workday Get more done Stop managing your email and start managing your work. IBM Verse brings forward the messages, meetings and actions you need to focus on. Right now. Cut through the clutter See your calendar at all times and access key contacts in a click. See if a colleague has something for you—or needs something from you. Review an attachment and reply. All without leaving your email. Collaborate from your inbox Post content to social networks and send instant messages. Set up or join online meetings and share files on the cloud. Take actions on content and conversations—all from the IBM Verse interface. Stay connected on the move Pick up where you left off from your desktop on your iOS or Android mobile device with the IBM Verse app. Display meetings, events and email without launching the app with the widget. Buy what you need now, add as you grow Buy IBM Verse stand-alone or as part of IBM Connections™ Cloud to expand flexibly and affordably. Integration and extensibility features help you make IBM Verse work with your existing IT investments.

    Makes email easy for you with great features, tools & over 200 domains - entirely for free!

    Take back control of your email with this easy-to-deploy mail server in a box.

    EMAIL GATEWAY is an mail Server Protection for Small Business and Enterprise that quarantine, spam detection and managed content filtering For Cleaner Email.

    Axigen Mail Server, Calendaring & Collaboration - All-in-one email, calendaring and collaboration platform, based on an innovative, proprietary technology, providing unmatched manageability for system administrators. Integrating all modules in a robust messaging solution, Axigen is developed for demanding users, from small businesses to large service providers. Axigen Business Messaging is a complete messaging solution providing full benefits of email communication & collaboration, integrated in a smart and secure solution based on a powerful mail server for business. Axigen platform is compatible with Microsoft Windows Server as well as with many Linux flavors, FreeBSD, or Solaris. The Axigen mail server works smoothly with most used email clients like Microsoft Outlook, Thunderbird or eM Client. The Axigen product portfolio for service providers serves as a viable all-in-one alternative to the high-end email and collaboration solutions available on the market. Our goal is to empower service providers — leveraging Axigen’s flexibility — to bring to market services tailored to SMEs. Main Features: • Groupware & Collaboration Features: Calendars, Tasks, Notes, Outlook Connector • The Axigen platform is compatible with Microsoft Windows Server as well as with many Linux flavors, FreeBSD, or Solaris. • The Axigen mail server works smoothly with most used email clients like Microsoft Outlook, Thunderbird or eM Client. • Automatic Migration Tool – fully automatic migration without even the need of the legacy accounts passwords. • Multiple, customizable branding & advertising options – WebMail Interface easily brandable & localized in over 29 languages, with several skins to be used at the end-user's choice. • Synchronizing emails, contacts, calendars or tasks by using Axigen's built-in Microsoft® Exchange ActiveSync® support for mobile devices. Available also through CardDav and CalDav implementation. • Integrated WebMail and WebAdmin client. • Integration with an external LDAP-based server (either OpenLDAP or Active Directory. • WebMail, POP3 and IMAP Proxy services available. • Email Security integration for Cyren, Kaspersky and Bitdefender. Virtually any AS/AV application integration capacity. • Extensive WebMail accounts and domain settings: Mailbox quota, attachment size limit, mail size limit, session idle & activity timeout, maximum number of messages sent per hour by one account, HTML filtering level for HTML email messages • 60-day, Full Feature Trial to download and use it on your own infrastructure. • Highly configurable platform – can also be integrated with third party billing / provisioning systems via API.

    CloudMailin drastically improves the way you receive email in your web app. You receive your email via a web hook (HTTP POST) and your website is free to do what it does best. Saving you time and money and allowing your email needs to scale as your site does.

    Gaggle Mail is the absolute simplest way to setup and maintain an email group. Gaggle Mail gives you your own permanent address that everyone in your group can use to contact everyone else in the group. Simple.

    Hiri is an email client for Managers on Windows, Mac and Linux.

    IceWarp is a provider of comprehensive messaging solutions for every business class, size and niche.

    iPost is the enterprise email marketing platform for marketers that want to be able to use all of their data, without add-ons or additional implementation. Unlike marketing clouds that are Jacks of all trades, masters of none, iPost delivers a powerful, easy-to-use email platform that simply integrates with other best-in-class marketing tools, empowering marketers and driving immediate ROI.

    Since 1998, the MDaemon Messaging Server has been trusted by customers in over 90 countries around the world to meet the needs of their small- to medium-sized businesses. MDaemon is a reliable and secure mail server that does not require expensive administration or impose high per-user costs. It simplifies messaging and collaboration with an intuitive, user-friendly design offering Mobile Device Management, Business Instant Messaging, Document Sharing and other enterprise-class features that can be managed with minimal training and support.

    OpenSMPTD is an implementation solution for SMTP protocol that allows you to exchange emails with other system speaking SMTP protocol.

    Prolateral's outbound email service gives you a secure and trusted means of sending and relaying your emails regardless of where you are or which ISP you are using.

    Tiliq is a modern, more affordable email service for your domains that is bringing email into the 21st century. Email has been stuck in the stone ages. Out of all of the web technologies in the world, email is the only one that has not had any updates for decades. With Tiliq, you get the lowest price in the industry, the latest and best technologies to make your email come to life, and the best support available anywhere in the market.

    Atmail provides user-friendly, white labelled, cloud-hosted email with 99.99% uptime and your choice of US or (GDPR compliant) EU data centres. If you want to stay in-house, we offer on-premises webmail and/or mail server options. Our customer satisfaction rating is 99% and you can rely on our professional services team for a smooth transition and ongoing support.

    AuthSMTP is the outgoing SMTP email service for your e-commerce website, mailing list or email application on most current computers and mobile devices.

    eM Client is a fully-featured email client with a modern and easy-to-use interface. eM Client also offers calendar, tasks, contacts and chat.

    Exchange EDB file data get stores in Exchange Server with extension Priv1 .EDB. It is used almost in every big enterprise and equally responsible for managing system database files.

    Jagware OST to PST Wizard is a conversion tool that helps to open and view data within an inaccessible OST file by saving it into PST format and import the converted PST file in any MS Outlook version.

    AI for email: an email solution using AI to automatically prioritize email, improve focus, and is personalized per user. is a privacy-focused email and communication service based out of Curaçao, one of the most secure privacy-oriented jurisdictions in the world. It offers complete email identity protection incorporating virtual email addresses, end-to-end encryption (supporting both GPG and S/MIME), intelligent domain management, and secure 1:1 audio and video chat into a sleek, easy-to-use webmail interface. All email is encrypted both in transit and at rest by default, using the best industry standard security protocols. is compatible with all existing software or webmail services without requiring any changes, special applications or plug-ins.

    OST to PST Wizard is a conversion tool that convert OST to PST without any loss of data.

    Web-browser, advanced e-mail, newsgroup and feed client, IRC chat, and HTML editing made simple all your Internet needs in one application.

    Servermx is a reliable and secure email hosting for companies, organizations, and individuals featuring WebMail, POP3, IMAP4 and SMTP @ We give Contacts, Calendars and Tasks via CalDAV and CardDAV support @ Our interface allows multiple domain names under the same account with no limitations @ We provide an easy-to-use Control Panel dedicated for each email-user @ Our multi-layered anti-spam system efficiently detects unsolicited emails and gives the ability to block emails at MTA level @ Dropbox connector for uploading automatically incoming attachments into your dropbox @ We have redundant servers in datacenter situated in different geographic locations.

    SmarterMail is a scalable business email server for small businesses.

    Softknoll OST to PST Converter supports for converting Exchange OST files into PST

    Thunderbird Import Wizard software provides two options to view/add MBOX file to Thunderbird. You can select any of the required option accordingly.

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