Can I open-source Zencal?
KINDA · partial or early alternativesKinda. Cal.com cover the core of Zencal, but they're early or partial — expect gaps like calendar connections, payments, reminders, team access, and hosted reliability and multiple calendar providers.
People still pay for Zencal because people pay because one double booking or missed invite can cost more than years of subscription fees. The recurring cost buys OAuth refresh, webhooks, timezone databases, race conditions, reminders, deliverability, privacy, and uptime, not just the visible interface.
xcalendar connections, payments, reminders, team access, and hosted reliability
xmultiple calendar providers
xteam routing and round-robin
xpayments
xtimezone edge-case maturity
These projects already replace it, free.
CCal.comOpen scheduling infrastructure with booking pages, round-robin, routing forms, and app integrationsopen source↗What each one is, in full: Cal.com
no votes, no pay-to-list · just what's real
Zencal pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| light | $10/user | $8.33/user | Maximum 1 user; unlimited meetings, topics, and calendars. |
| pro | $28/user | $23.33/user | Unlimited meetings, topics, and calendars; 1 user included. |
| team | $349 | $290.83 | Up to 20 users; unlimited meetings, topics, and calendars. |
| enterprise | custom | — | 20+ users; custom limits and onboarding. |
free tierno free tier
billingmonthly + annual (2 months free); 14-day trial; Enterprise custom
hidden costsOptional modules are separately priced: Events +$10/month, Bundles +$10, Analytics +$10, Clients +$10, Client Portal +$28, Conversions +$8; SMS costs $0.08 each outside Enterprise; displayed prices are gross.
verified 2026-08-14 · source ↗
Can I open-source Zencal?
Kinda. Cal.com covers the core of Zencal, but there are real gaps: calendar connections, payments, reminders, team access, and hosted reliability, multiple calendar providers. Read the honest list above before committing.
How much does Zencal cost?
Zencal costs about $28/month (Pro, checked 2026-08-14), which is $336 per year.
What do I lose by replacing Zencal?
Honestly: calendar connections, payments, reminders, team access, and hosted reliability; multiple calendar providers; team routing and round-robin; payments; timezone edge-case maturity. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Zencal?
Yes: Cal.com (Open scheduling infrastructure with booking pages, round-robin, routing forms, and app integrations)