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Fastmail alternatives

Top Email Clients & Providers like Fastmail

The most popular alternative to Fastmail is Proton Mail, which has a free version. Other great alternatives to Fastmail are Tuta, HEY, Gmail, and Zoho Mail.

Most alternatives to Fastmail are in the Email Clients & Providers category, compared here by price, platform and features.

Fastmail alternatives
AllFreeOpen source
9 apps

All Fastmail alternatives

  1. Proton Mail

    4.8(48.7K) · App Store

    Proton Mail is an end-to-end encrypted email service based in Switzerland. Messages between Proton users are encrypted automatically, emails to others can be password-protected, and stored mail uses zero-access encryption so Proton cannot read it. Its apps are open source, paid plans add custom domains and more addresses, and it is part of a suite with Proton Calendar, Drive, VPN and Pass.

    9 Proton Mail alternatives

    Pros

    • End-to-end and zero-access encryption protect stored mail
    • Based in Switzerland, with open source apps
    • Part of a suite with Proton Calendar, Drive, VPN and Pass

    Cons

    • Free plan is tight on storage and addresses
    • Using IMAP clients requires Proton Mail Bridge and a paid plan
    Cost / License
    FreemiumOpen source
    Categories
    Email Clients & Providers
    Platforms
    WebWindowsMacLinuxiPhoneAndroid
    Features
    Custom email domainEmail aliasesEnd-to-end encryptionSend laterTracker blockingTwo-factor authentication
    Visit websiteMore about Proton Mail

  2. Tuta

    4.7(3.7K) · App Store

    Tuta, formerly Tutanota, is an open-source encrypted email and calendar service based in Germany. It encrypts mailbox contents end to end, including subject lines and contacts, and uses post-quantum cryptography for new accounts. Because it relies on its own encryption, it works through Tuta's apps rather than IMAP clients. A free plan exists, and paid plans add custom domains and more aliases.

    7 Tuta alternatives

    Pros

    • Encrypts subjects and contacts, not just message bodies
    • Post-quantum cryptography for new accounts
    • Open source apps and a free plan, with servers in Germany

    Cons

    • No IMAP support, so you must use Tuta’s own apps
    • Free plan is limited in storage and features
    • Fewer integrations and features than mainstream providers
    Cost / License
    FreemiumOpen source
    Categories
    Email Clients & Providers
    Platforms
    WebWindowsMacLinuxiPhoneAndroid
    Features
    Calendar viewCustom email domainEmail aliasesEnd-to-end encryptionGDPR compliant
    Visit websiteMore about Tuta

  3. HEY

    4.6(4.3K) · App Store

    HEY is a paid email service from 37signals, the makers of Basecamp, that rethinks how mail is triaged. First-time senders must be approved in the Screener, newsletters go to The Feed, receipts to the Paper Trail, and spy pixels are blocked automatically. It includes a calendar and supports custom domains for businesses, but works only with HEY addresses rather than existing Gmail or IMAP accounts.

    9 HEY alternatives

    Pros

    • Screener lets you approve first-time senders before they reach you
    • Spy pixels in emails are blocked automatically
    • The Feed and Paper Trail set newsletters and receipts aside

    Cons

    • Works only with HEY addresses, not existing Gmail or IMAP accounts
    • Opinionated workflow that doesn’t suit everyone
    • No free plan beyond the trial
    Cost / License
    Free trialProprietary
    Categories
    Email Clients & Providers
    Platforms
    WebWindowsMacLinuxiPhoneAndroid
    Features
    Ad-freeCalendar viewCustom email domainTracker blocking
    Visit websiteMore about HEY

  4. Gmail

    4.7(2.4M) · App Store

    Gmail is Google's email service, used through the web and mobile apps or any IMAP client. It offers automatic spam filtering, labels and inbox categories, fast search, scheduled sending and close links with Calendar, Drive and Meet. Personal accounts are free and share storage with Drive and Photos, while Google Workspace adds custom domains and admin tools; Gemini can draft and summarize emails.

    12 Gmail alternatives

    Pros

    • Excellent spam filtering and fast search
    • Tight links with Google Calendar, Drive and Meet
    • Free personal accounts on web, mobile and any IMAP client

    Cons

    • Free storage is shared with Drive and Photos and fills up quickly
    • Google’s data practices raise privacy concerns
    • Custom domains require a paid Google Workspace plan
    Cost / License
    FreemiumProprietary
    Categories
    Email Clients & Providers
    Platforms
    WebiPhoneAndroid
    Features
    AI assistantCustom email domainOffline modeSend laterTwo-factor authentication
    Visit websiteMore about Gmail

  5. Zoho Mail

    4.6(8K) · App Store

    Zoho Mail is an ad-free business email service from Zoho that hosts mailboxes on your own domain, with calendar, contacts, tasks and notes included. Admins get a control panel for users, security policies and retention, and the service integrates with Zoho's office, CRM and collaboration apps through Zoho Workplace. A free plan is available for small teams, with paid plans adding more storage and features.

    8 Zoho Mail alternatives

    Pros

    • Ad-free business email on your own domain, with a free plan
    • Admin console for users, security policies and retention
    • Integrates with Zoho’s office, CRM and collaboration apps

    Cons

    • Free plan lacks IMAP and POP access for desktop clients
    • Interface feels less polished than Gmail or Outlook
    Cost / License
    FreemiumProprietary
    Categories
    Email Clients & Providers
    Platforms
    WebiPhoneAndroid
    Features
    Ad-freeCalendar viewCustom email domainIntegrationsTwo-factor authentication
    Visit websiteMore about Zoho Mail

  6. Microsoft Outlook

    4.8(9.3M) · App Store

    Microsoft Outlook is an email and calendar app available on Windows, Mac, mobile and the web, used with Outlook.com, Exchange and Microsoft 365 accounts as well as Gmail and other IMAP services. It combines mail with calendars, contacts and tasks, supports shared mailboxes and scheduled sending, and integrates with Teams for meetings. Copilot can draft replies and summarize threads on eligible plans.

    12 Microsoft Outlook alternatives

    Pros

    • Email, calendar, contacts and tasks in one app
    • Shared mailboxes and Teams integration for businesses
    • Available on Windows, Mac, mobile and the web

    Cons

    • The move from classic to new Outlook on Windows has been disruptive
    • Free Outlook.com accounts show ads
    • Copilot features require an eligible paid plan
    Cost / License
    FreemiumProprietary
    Categories
    Email Clients & ProvidersScheduling & Calendars
    Platforms
    WebWindowsMaciPhoneAndroid
    Features
    AI assistantCalendar viewIntegrationsOffline modeSend laterShared inbox
    Visit websiteMore about Microsoft Outlook

  7. Superhuman

    4.6(3.7K) · App Store

    Superhuman is a premium email client for Gmail and Microsoft accounts, designed around keyboard shortcuts and speed. It offers split inboxes, reminders, scheduled sending, read statuses, snippets and AI features that draft replies and summarize threads. It targets professionals and executives who handle large volumes of email, and is sold as a subscription with no free plan.

    8 Superhuman alternatives

    Pros

    • Keyboard shortcuts make triaging email very fast
    • Split inboxes, reminders and snippets for heavy email users
    • AI drafts replies and summarizes long threads

    Cons

    • Expensive subscription with no free plan
    • Only works with Gmail and Microsoft accounts
    • Read statuses rely on tracking pixels, a privacy concern
    Cost / License
    PaidProprietary
    Categories
    Email Clients & Providers
    Platforms
    WebWindowsMaciPhoneAndroid
    Features
    AI assistantEmail trackingSend laterTemplates
    Visit websiteMore about Superhuman

  8. Spark

    4.6(82.7K) · App Store

    Spark is an email client from Readdle that works with Gmail, Outlook, iCloud and other IMAP accounts on Mac, Windows, iPhone and Android. Its smart inbox separates personal mail, notifications and newsletters, and it supports send later, snoozing, a gatekeeper for new senders and AI writing help. Teams can share email threads, comment on them privately and draft replies together.

    11 Spark alternatives

    Pros

    • Smart inbox separates personal mail, notifications and newsletters
    • Shared threads and private comments for team email
    • Gatekeeper screens new senders before they reach the inbox

    Cons

    • Sync relies on Readdle’s servers, which raises privacy questions
    • AI and team features require a paid plan
    Cost / License
    FreemiumProprietary
    Categories
    Email Clients & Providers
    Platforms
    WindowsMaciPhoneAndroid
    Features
    AI assistantSend laterTeam collaborationUnified inbox
    Visit websiteMore about Spark

  9. Thunderbird

    Thunderbird is a free and open-source email client for Windows, macOS and Linux, with an Android app based on K-9 Mail. It manages multiple accounts in a unified inbox and includes a calendar, address book, chat and built-in OpenPGP encryption. Add-ons and themes customize it extensively, and it is developed by MZLA Technologies, a Mozilla Foundation subsidiary funded by user donations.

    9 Thunderbird alternatives

    Pros

    • Free and open source, funded by donations rather than ads
    • Built-in OpenPGP encryption, calendar and address book
    • Highly customizable with add-ons and themes

    Cons

    • Interface feels busier than minimalist modern clients
    • Getting the most out of it takes some setup and add-ons
    Cost / License
    FreeOpen source
    Categories
    Email Clients & Providers
    Platforms
    WindowsMacLinuxAndroid
    Features
    Ad-freeCalendar viewEnd-to-end encryptionOffline modePlugins & extensionsUnified inbox
    Visit websiteMore about Thunderbird

Fastmail vs its alternatives at a glance

Pricing, platforms and the key features of Fastmail, compared with its most popular alternatives.

Fastmail vs its alternatives at a glance
AppPricingPlatformsAd-freeCalendar viewCustom email domainEmail aliasesSend later
FastmailFree trialWeb, iPhone, Android
Proton MailFreemiumOpen sourceWeb, Windows, Mac, Linux, iPhone, Android
TutaFreemiumOpen sourceWeb, Windows, Mac, Linux, iPhone, Android
HEYFree trialWeb, Windows, Mac, Linux, iPhone, Android
GmailFreemiumWeb, iPhone, Android
Zoho MailFreemiumWeb, iPhone, Android

Fastmail alternatives: frequently asked questions

What is the best alternative to Fastmail?

The most popular alternative to Fastmail is Proton Mail: Encrypted email from Switzerland with a free plan. Other great alternatives are Tuta, HEY, Gmail, and Zoho Mail.

Is there a free alternative to Fastmail?

Yes, 7 alternatives are free or have a free plan, including Proton Mail, Tuta, Gmail, and Zoho Mail.

Is there an open source alternative to Fastmail?

Yes, 3 open source alternatives are listed, including Proton Mail, Tuta, and Thunderbird.

Is Fastmail free?

Fastmail is a paid app that offers a free trial.

Compare Fastmail with its alternatives

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