Alternatives

Alternatives to Shortwave

5 Email Clients & Email AI rivals, ranked by the same evidence-graded leaderboard — Shortwave itself ranks #5 with a PA Score of 22/100. Every “beats Shortwave on” below comes from a judged head-to-head round with cited evidence — see the methodology.

#1
AgentMail
AgentMail
PA Score 46/100vs Shortwave →
coverage
31.5/100
Beats Shortwave on: Drive the product through a documented public API · Connect an agent via an official MCP server
#2
Zero
Zero Email Inc. (Mail-0 open-source project)
PA Score 28/100vs Shortwave →
coverage
23.2/100
Beats Shortwave on: Connect an agent via an official MCP server · Drive the product through a documented public API
#3
Missive
Missive (Conference Badge Inc.)
PA Score 24/100vs Shortwave →
coverage
26.2/100
Beats Shortwave on: Connect an agent via an official MCP server · Drive the product through a documented public API
#4
Superhuman Mail
Superhuman (formerly Grammarly)
PA Score 24/100vs Shortwave →
coverage
29.8/100
Beats Shortwave on: Connect an agent via an official MCP server · AI drafts replies in my own voice and tone — ready to review and send, not generic boilerplate
#6
Fastmail
Fastmail Pty Ltd
PA Score 14/100vs Shortwave →
coverage
17.8/100
Beats Shortwave on: Drive the product through a documented public API · 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

Full leaderboard: Email Clients & Email AI arena →