WHEN
Self-hosted scheduling with public booking pages and availability rules.
Productivity / Replacement guide
Vibe-coded alternatives to Calendly.
Calendly serves people working on appointment scheduling and public booking pages. These independent projects explore parts of that workflow with documented AI assistance. They are candidates to evaluate, not guaranteed drop-in replacements.
Before you switch. Scheduling reliability depends on time zones, calendar conflicts, availability rules and cancellation flows. Test daylight-saving transitions and duplicate bookings before sharing a new booking link.
Sources checked 29 October 2026. AI contribution evidence is separate from software quality. Read our method
Sources checked 29 October 2026. AI contribution evidence is separate from software quality. Read our method
The Calendly workflow, in its own documentation.
Reviewed 2026-10-29. These facts describe the original tool; evaluate each alternative against your specific requirements.
One documented option
Sources, not sponsored rankings.Compare the tradeoffs.
Capability statements come from project documentation. We have not functionally tested these third-party apps.
| Project | Documented scope | Cost / license | Platform | Self-hosting | AI provenance |
|---|---|---|---|---|---|
| WHENreleased · Repository | free MIT | web | Documented | Maker claim |
Which workflow can you switch?
WHEN
Switchable workflow: Replace a solo Calendly-style booking page with your own event types, availability rules and calendar-connected scheduling. Source
Requires your own Supabase configuration; calendar sync and email require Google OAuth and Resend credentials. Feature claims have not been runtime-tested. Project source
Compare Calendly vs WHENUse the step-by-step switching checklist
Questions worth asking.
Can I replace Calendly with one of these today?
Match your actual workflow against the documented scope and limitations above. Scheduling reliability depends on time zones, calendar conflicts, availability rules and cancellation flows. Test daylight-saving transitions and duplicate bookings before sharing a new booking link. None of these listings is a promise of feature parity.
What does “vibe-coded” mean on this page?
Each app links to attributable evidence of AI-assisted development. A verified contribution badge means a public commit credits an AI coauthor; a maker claim means the owner states AI was used. Neither establishes that every line was AI-generated or reviewed.
Are these options free and open source?
WHEN are documented as free to use. Check the license linked for each project. Running infrastructure can still incur costs. Open source alone is not evidence of AI authorship.
What should I test before migrating?
For Calendly, focus on booking pages, calendar conflicts, time zones. Keep originals, try disposable copies and inspect round-trip exports. Missing comparison facts are unknown.