2 open source alternatives to Calendly
Appointment scheduling and meeting links. Here are the open source projects real teams use instead — ranked by fit, with honest pros and cons for each.
What people don't love about Calendly
- Free tier is limited to one event type.
- Pricing grows with team size.
- No self-hosted option.
Current Calendly pricing (for reference): Free tier; Standard from $10/seat/month.
Quick comparison
| Alternative | Best for | License | Self-host | Hosted cloud? |
|---|---|---|---|---|
|
Cal.com Open source Calendly alternative — self-host or cloud. |
Feature-rich Calendly replacement with self-host option. | AGPL-3.0 | ★★★☆☆ | Yes |
|
Rallly Open source Doodle-style meeting poll. |
When you just need to find a meeting time with a group. | AGPL-3.0 | ★☆☆☆☆ | Yes |
1. Cal.com — Feature-rich Calendly replacement with self-host option.
Open source Calendly alternative — self-host or cloud.
Strengths
- Feature-rich — routing, round-robin, teams.
- Rapidly developed open source community.
- Integrations with Zoom, Google Cal, Outlook.
Weaknesses
- Self-hosting has many env vars and OAuth apps.
- Upgrade path breaks occasionally.
- Some team features gated on cloud.
2. Rallly — When you just need to find a meeting time with a group.
Open source Doodle-style meeting poll.
Strengths
- Focused scope — just find a meeting time.
- Clean UI and fast.
- Simple docker deploy.
Weaknesses
- Not a full booking product.
- No recurring event support.
- Limited integrations.
Not what you're looking for?
Browse other tools in Scheduling & Calendars, or check out open source projects by category on the full category index.
Recommended reading
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Will the open source project you depend on still exist in three years?
Bus factor, maintainer burnout, funding models, and the signals that separate OSS projects that survive from those that quietly decay.
From SaaS to self-hosted: a 30-day migration playbook
A week-by-week plan to move one service off SaaS and onto your own server without breaking your team's workflow.