Alternatives

Alternatives to Missive

5 Email Clients & Email AI rivals, ranked by the same evidence-graded leaderboard — Missive itself ranks #3 with a PA Score of 24/100. Every “beats Missive on” below comes from a judged head-to-head round with cited evidence — see the methodology.

#1
AgentMail
AgentMail
PA Score 46/100vs Missive →
coverage
31.5/100
Beats Missive on: Point an agent at llms.txt or agent-oriented docs · Download a machine-readable API spec (OpenAPI or equivalent)
#2
Zero
Zero Email Inc. (Mail-0 open-source project)
PA Score 28/100vs Missive →
coverage
23.2/100
Beats Missive on: Self-host the core product · Read the product's source under an open license
#4
Superhuman Mail
Superhuman (formerly Grammarly)
PA Score 24/100vs Missive →
coverage
29.8/100
Beats Missive on: AI drafts replies in my own voice and tone — ready to review and send, not generic boilerplate · Split my inbox into focused streams — important, team, newsletters, calendar invites — so triage happens in priority order, not arrival order
#5
Shortwave
Shortwave (ex-Google Inbox team)
PA Score 22/100vs Missive →
coverage
24.7/100
Beats Missive on: Split my inbox into focused streams — important, team, newsletters, calendar invites — so triage happens in priority order, not arrival order · Schedule an email to send later and undo a send within a grace window
#6
Fastmail
Fastmail Pty Ltd
PA Score 14/100vs Missive →
coverage
17.8/100
Beats Missive on: My mail stays reachable over open protocols and standard formats — IMAP/JMAP/SMTP access and standards-based export — so no client can lock me in · Schedule an email to send later and undo a send within a grace window

Full leaderboard: Email Clients & Email AI arena →