Scheduling and meetings
Zencal alternatives
2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.
The projects
clientpadClientPad is open-source WhatsApp-first CRM infrastructure for service businesses... gives developers the SDK, API, CLI, dashboard, and WhatsApp automation layer to build lead capture, bookings, payments, follow-ups, and client workflows into any app.Open on GitHub ↗chedula_backendAI-Powered Booking Backend Django REST API backend for an AI-driven scheduling and contract automation app. Manages calendar events, customer data, services, and AI integration.Open on GitHub ↗
What you give up either way
- Hosted reliability, uptime SLA and managed infra
- Built-in EU data-centers / GDPR-hosting guarantees
- Polished dashboard/analytics and conversion insights
- Enterprise features (dedicated infra, SLA, account manager)
- Native integrations and tested calendar edge-case handling
An open-source project doing the core job proves a replacement is possible. It does not prove it matches Zencal, and it does not prove anyone has run it for a month. How we decide.