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Alternatives

Alternatives to Fastmail

5 Email Clients & Email AI rivals, ranked by the same evidence-graded leaderboard — Fastmail itself ranks #6 with a PA Score of 14/100. Every “beats Fastmail on” below comes from a judged head-to-head round with cited evidence — see the methodology.

  1. #1AgentMail logo
    AgentMail

    AgentMail

    PA Score 46/100vs Fastmail →
    coverage
    31.5/100

    Beats Fastmail on: Connect an agent via an official MCP server · Point an agent at llms.txt or agent-oriented docs

  2. #2Zero logo
    Zero

    Zero Email Inc. (Mail-0 open-source project)

    PA Score 28/100vs Fastmail →
    coverage
    23.2/100

    Beats Fastmail on: Connect an agent via an official MCP server · Delegate tasks to a built-in AI assistant inside the product

  3. #3Missive logo
    Missive

    Missive (Conference Badge Inc.)

    PA Score 24/100vs Fastmail →
    coverage
    26.2/100

    Beats Fastmail on: Connect an agent via an official MCP server · My team works shared inboxes together — shared accounts or team channels where everyone sees the same conversation state

  4. #4Superhuman Mail logo
    Superhuman Mail

    Superhuman (formerly Grammarly)

    PA Score 24/100vs Fastmail →
    coverage
    29.8/100

    Beats Fastmail on: AI drafts replies in my own voice and tone — ready to review and send, not generic boilerplate · Connect an agent via an official MCP server

  5. #5Shortwave logo
    Shortwave

    Shortwave (ex-Google Inbox team)

    PA Score 22/100vs Fastmail →
    coverage
    24.7/100

    Beats Fastmail on: Plug MCP servers into this product so it can use their tools · Delegate tasks to a built-in AI assistant inside the product

Full leaderboard: Email Clients & Email AI arena →