Can I open-source Superhuman?
YES · mature open-source replacementYes. Listmonk (22k stars), Mailspring (18k stars), Stalwart (8k stars) are mature open-source replacements for Superhuman — self-host in one command and stop paying $40/mo.
People still pay for Superhuman because an email client can be rebuilt; operating a trusted mail service with excellent deliverability cannot. The recurring cost buys IMAP quirks, OAuth, MIME, threading, search, attachments, offline sync, notifications, secure storage, and provider changes, not just the visible interface.
xGmail and Outlook integration depth, AI, coaching, team features, and exceptional polish
xmail hosting and deliverability
xpush on every platform
xadvanced team collaboration
xprovider-specific AI and search
These projects already replace it, free.
MMailspringKeyboard-first desktop mail with a local index; the speed is real even when the workflow extras are paid.open source↗TThunderbirdKeyboard-driven local mail and search with no subscription; the interface will not flatter your venture round.open source↗LListmonkHigh-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backendopen source↗What each one is, in full: Listmonk
all 4 open-source alternatives to Superhuman →· no votes, no pay-to-list · just what's real
Superhuman pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| starter | $30/user | $25/user | 1 paid person may connect multiple email accounts they own; each teammate requires a separate seat. |
| business | $40/user | $33/user | 1 paid seat per teammate; shared team features and admin controls. |
| enterprise | custom | — | Custom seats, controls and pricing; numeric limits not public. |
free tierno free tier; current official pricing help did not publish a numeric trial allowance
billingmonthly + annual; annual prepaid and auto-renewing; added annual seats are prorated
hidden costsEach person requires a paid seat, although one person may connect multiple email accounts they own. Annual plans are paid upfront and added seats are prorated for the remainder of the term.
verified 2026-08-11 · source ↗
Is Superhuman free?
No free plan, just a 30-day trial (a referral is usually required). Paid is Business at $40/mo (checked 2026-08-07).
Can I open-source Superhuman?
Yes. Mailspring replaces Superhuman today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Superhuman cost?
Superhuman costs about $40/month (Business, checked 2026-08-07), which is $480 per year. That's what you save by replacing it with open source.
What do I lose by replacing Superhuman?
Honestly: Gmail and Outlook integration depth, AI, coaching, team features, and exceptional polish; mail hosting and deliverability; push on every platform; advanced team collaboration; provider-specific AI and search. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Superhuman?
Yes: Mailspring (Keyboard-first desktop mail with a local index; the speed is real even when the workflow extras are paid.) Thunderbird (Keyboard-driven local mail and search with no subscription; the interface will not flatter your venture round.) Listmonk (High-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backend) All 4 curated open-source alternatives are at caniopensourceit.online/superhuman/alternatives.