Postbird and Mailchimp solve the same problem from opposite directions: one is source-available software you can own outright for $59, the other is a subscription at $20+/mo (grows with your list) run entirely on someone else's servers.
Head to head
| Postbird | Mailchimp | |
|---|---|---|
| Price | $59 once | ~$20/mo @ 1k contacts, $100+/mo @ 10k |
| Contact limits | None | Priced per contact |
| SMTP | Any provider — BYO (SES, Postmark, Mailgun...) | Theirs only |
| Your data | Your SQLite file | Their cloud |
| Compliance | Hard send-block until compliant | Soft warnings |
| RFC 8058 one-click unsubscribe | Yes, every campaign | Yes |
| Runs as a desktop app | Yes | No |
| Source code | MIT, on GitHub | Closed |
What Postbird does well
- Lists & subscribers — CSV import with dedupe and invalid-email reporting, public signup endpoint per list, CSV export, full status tracking (pending → subscribed → unsubscribed/bounced/complained).
- Double opt-in by default — Signup → signed confirmation link; only confirmed subscribers get campaigns. Consent timestamp + IP stored for GDPR.
- Segments — Saved AND/OR filters — domain, name, custom fields, signup date, opened/clicked recent campaigns — with a live count while you edit.
- Drag-block builder — Heading, rich text, image, bulletproof button, columns, footer. Compiles to table-based inline-styled HTML — no flexbox, no grid, no Outlook surprises.
What Mailchimp still does better
There's a real reason Mailchimp costs what it does: a bigger team, broader integrations and dedicated support behind it. If that ecosystem is genuinely what you need, it's worth paying for.
Which one should you pick
If your workflow depends on Mailchimp's specific integrations or you'd rather not run anything yourself, stay put — that's a legitimate call. If you're comfortable owning the tool and want to stop paying $20+/mo (grows with your list) for a job your own hardware can do, Postbird pays for itself and then some: at 1,000 contacts, Mailchimp Standard costs more than Postbird every three months, forever. Break-even is ~2 months — and the bigger your list gets, the more you save.
Try Postbird — $59, once
Lists, segments, a drag-block builder, throttled sending & open/click tracking — no per-contact pricing.