Kit (ConvertKit) is one of the better-known subscription tools in its space — and at $39/mo (Creator, up to 1,000 subs; $33/mo annual — scales to $199/mo at 25k subs), one of the recurring line items people most often look to replace. If you're searching for a Kit (ConvertKit) alternative you pay for once and own forever, Postbird is the OneTimeSuite answer: $59, one time.
Why people go looking for an alternative
Kit (ConvertKit) runs $39/mo (Creator, up to 1,000 subs; $33/mo annual — scales to $199/mo at 25k subs), and like most SaaS the bill never stops — cancel and you typically lose access to your own history. That's roughly $1,404 over three years. Postbird flips that model: Lists, segments, a drag-block builder, throttled sending & open/click tracking — no per-contact pricing.
What Postbird covers
- 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.
- Throttled sending, any SMTP — Default 30 msgs/min (configurable) over pooled nodemailer. Pause or cancel mid-send; the queue lives in SQLite, so a restart resumes where it left off.
The honest trade-off
Kit (ConvertKit) will keep shipping features, integrations and managed infrastructure that a pay-once tool won't chase — if that ecosystem is genuinely load-bearing for your workflow, staying is a fair call. For the core job, the math favors owning the tool: $59 once against $39/mo (Creator, up to 1,000 subs; $33/mo annual — scales to $199/mo at 25k subs) forever. 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.
Also worth reading
Postbird's main head-to-head is with Mailchimp — see the detailed comparison or the product page for the full feature list, FAQ and demo video.
Try Postbird — $59, once
Lists, segments, a drag-block builder, throttled sending & open/click tracking — no per-contact pricing.