Calendly is not available as a self-hosted solution but there are plenty of alternatives for power users and business that want to host a solution on-premise. The best open source Self-Hosted alternative is Cal.com. It's not free, so if you're looking for a free alternative, you could try Cal.com or Easy!Appointments. If that doesn't suit you, our users have ranked more than 100 alternatives to Calendly and 11 are open source and available as a self-hosted solution so hopefully you can find a suitable replacement. Other interesting open source Self-Hosted alternatives to Calendly are Meetsy, hash-calendar, Nextcloud Polls and Ink-In-Time.
Open-source scheduling tool offering self-hosted or hosted deployment, complete white-label branding, API-driven customization, data ownership, online booking management, flexible embedding, privacy, and integration for business meetings, seminars, and more.
United States
Easy!Appointments is a highly customizable web application that allows your customers to book appointments with you via the web. Moreover, it provides the ability to sync your data with Google Calendar so you can use them with other services.
Greece
EU
Tymeslot is a source-available, privacy-first meeting-scheduling platform built with Elixir and Phoenix LiveView. Self-host it on your own infrastructure or let us run it for you — either way, your data stays yours.
EstoniaEU
lightweight, client-only calendar web application. All data persists in the URL hash for instant sharing, No backend required. Optional AES-GCM password protection keeps shared links locked without a server.
Sri Lanka
A polls app, similar to doodle/dudle with the possibility to restrict access (members, certain groups/users, hidden and public).
GermanyEU
Appointment scheduling/booking application that aims to be super-simple, and open source!
Croodle is a web application to schedule a date or to do a poll on a general topics. All data like title and description, number and labels of options and available answers and names of users are encrypted/decrypted in the browser using 256 bits AES.
Creavi is a free, open-source WordPress plugin for scheduling appointments through a customizable booking calendar, with Google and Outlook sync, reminders, custom forms, timezone support, and secure video meetings.
DenmarkEU
Open-source, AI-native scheduling platform merges all calendars into a conflict-free system with a single link, team round-robin, routing forms, group polls, reminders across channels, Stripe integration, and self-hostable Docker deployment for private control.
United States
Calendo is a free scheduling app. Share a booking link and people pick a time that fits your availability. It syncs with Google Calendar and Outlook to avoid double-bookings, and creates Zoom, Google Meet or Microsoft Teams links automatically.
