Maintain full control over scheduling data and avoid vendor lock-in
Kalendar.work is open source and self-hostable, letting users own their scheduling infrastructure, customize the tool as needed, and avoid dependency on third-party SaaS providers
Kalendar.work
Kalendar.work
A free fully featured Calendly alternative
Overview
What it is
Kalendar is a free, fully customizable Calendly replacement for teams that want control, not lock-in. Create booking links, manage availability, add your own branding, and run unlimited event types without per-seat pricing or artificial limits. Kalendar is built on Founding.dev and can be adapted to your workflows as your needs grow. It’s designed to be owned, extended, and used long-term not rented.
Intent
I need it when
Automate calendar management and meeting coordination across multiple calendar systems
Kalendar.work syncs bidirectionally with Google Calendar and Outlook, automatically creating events from bookings, respecting busy times, and enabling attendees to reschedule or cancel with automatic notifications and calendar updates
Customize booking experience with branded communications and flexible scheduling rules
Kalendar.work provides custom branding on booking pages, branded confirmation emails and reminders, flexible availability by day, buffer times, minimum notice periods, and booking windows—all included free
Replace expensive scheduling software like Calendly while maintaining professional features
Kalendar.work offers unlimited event types, custom branding, two-way calendar sync, and branded email notifications—features competitors charge $15–30/month for—completely free and forever, eliminating recurring scheduling software costs
Set up a professional booking page quickly without technical complexity
Kalendar.work enables setup in 2 minutes via Google or Outlook sign-in, with no credit card required, allowing users to define availability, customize meeting types, and share a personalized booking link immediately
Drop
Not a fit when
- User requires advanced team collaboration features or multi-user account management beyond individual scheduling
- User needs enterprise-grade SLA, dedicated support, or compliance certifications (SOC 2, HIPAA)
- User operates in a regulated industry requiring vendor lock-in guarantees and formal service agreements
- User prefers a fully managed SaaS solution without self-hosting or technical setup responsibilities
- User requires integrations with niche CRM or business tools beyond Google Calendar and Outlook
Commercials
Pricing
USD0 / free View pricing