Can I open-source Mimestream?
KINDA · partial or early alternativesKinda. Stalwart and Listmonk cover the core of Mimestream, but they're early or partial — expect gaps like deep Gmail API use, native macOS polish, sync reliability, and support and mail hosting and deliverability.
People still pay for Mimestream 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.
xdeep Gmail API use, native macOS polish, sync reliability, and support
xmail hosting and deliverability
xpush on every platform
xadvanced team collaboration
xprovider-specific AI and search
These projects already replace it, free.
LListmonkHigh-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backendopen source↗SStalwartModern all-in-one mail server in Rust with JMAP, IMAP, and SMTP plus built-in spam filtering.open source↗What each one is, in full: Listmonk · Stalwart
no votes, no pay-to-list · just what's real
Mimestream pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| individual | $4.99 | $4.17 | All supported Google accounts; up to 5 devices; sharing with immediate family in the same household. |
| group | $4.99/user | $4.17/user | 1 seat per user; self-service purchase for up to 50 seats; contact sales above 50 seats. |
free tierno free tier; 14-day fully functional trial, no credit card
billingmonthly + annual; auto-renews; no one-time or lifetime purchase
hidden costsSales tax or VAT may apply; promotional prices apply only for the stated promotional term. Group plans with 10+ seats may temporarily exceed the purchased seat count for 30 days, after which enough seats must be bought; monthly payments are non-refundable.
verified 2026-08-12 · source ↗
Can I open-source Mimestream?
Kinda. Listmonk covers the core of Mimestream, but there are real gaps: deep Gmail API use, native macOS polish, sync reliability, and support, mail hosting and deliverability. Read the honest list above before committing.
How much does Mimestream cost?
Mimestream costs about $4.99/month (Individual, checked 2026-07-31), which is $59.88 per year.
What do I lose by replacing Mimestream?
Honestly: deep Gmail API use, native macOS polish, sync reliability, and support; 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 Mimestream?
Yes: Listmonk (High-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backend) Stalwart (Modern all-in-one mail server in Rust with JMAP, IMAP, and SMTP plus built-in spam filtering.)