head to head
Calendly vs Rallly
Rallly is the open source alternative to Calendly — scheduling and meeting booking. Here is the honest comparison.
Yes — Rallly is a viable free replacement for Calendly. Rallly is open source under AGPL-3.0, written in TypeScript, with 5,261 GitHub stars, 556 forks and 2 open issues; it was last pushed 9 hours ago. Calendly costs from $10, while self-hosting Rallly carries no licence fee — the trade is your operational time instead of a subscription. 1 other open source Calendly alternative is tracked here, led by Cal.com at 48,529 stars. Rallly ranks #2 of 2 tracked open source Calendly alternatives by stars. The tracked set, by adoption: Cal.com (48,529 stars). Replacement criteria on this page: 4 reasons to move to Rallly and 3 reasons to stay on Calendly.
choose Rallly if
- Your Calendly bill is growing with seats or usage
- You need your data in a format and server you control
- Your compliance posture requires auditing the code that touches sensitive data
- You have (or can rent) a server and basic Docker comfort
stick with Calendly if
- You need the polished onboarding and support SLAs of a commercial vendor
- Your team has zero capacity to operate software, even self-hosted-simple
- You depend on a Calendly integration ecosystem that the OSS alternatives have not replicated
Side by side
| Rallly (open source) | Calendly | |
|---|---|---|
| Price | Free (self-hosted) | Free / $10-15/seat/month |
| License | AGPL-3.0 | Proprietary |
| Source code | Public, auditable | Closed |
| Self-hosting | Yes — lukevella/rallly | Cloud only |
| Data ownership | Your server, your format | Vendor's cloud |
| Community | ★ 5.3K · ⑂ 556 | — |
| Built with | TypeScript | — |
Why people look for a Calendly alternative
About Rallly
Rallly is an open source scheduling and collaboration tool built to help groups find the best date and time to meet. Instead of exchanging messages about availability, a person creates a poll with several candidate dates and times, shares the link, and participants vote on the options that work for them. It lives in the Business Software category, specifically Scheduling and Event Management, and positions itself as an open alternative to Calendly. The project is written in TypeScript and released under the AGPL 3.0 license, with the source hosted publicly and the hosted service available at rallly.co.
read the full Rallly overview →
Other open source alternatives to Calendly
last updated nightly · ranking method: github stars, live-tracked
Frequently asked questions
Is Rallly a good replacement for Calendly?
Rallly is an open source alternative to Calendly (Scheduling and meeting booking). It is written in TypeScript and licensed under AGPL-3.0, with 5,261 GitHub stars.
Is Rallly free compared to Calendly?
Yes. Rallly is open source — there is no licence fee, and you can self-host it. Calendly is typically a paid subscription, so the trade-off is licence cost against the operational work of running it yourself.
How do I migrate from Calendly to Rallly?
Migration effort depends on the data formats involved. Check Rallly's documentation for import options, and compare the feature table above to confirm the capabilities you depend on are covered before switching.