Cal.com
Calendar booking — like Calendly, but open source, self-hostable, and built for developers. Embeds into your product, fully customizable.
- Location
- Berlin, Germany
- Raised
- $32M
- Stage
- Series A
- Founded
- 2021
- Category
- Open Source
- Funding
- VC-backed
- Team
- 11-50
Funding figures as of Jul 2025 · not independently verified
Founders of Cal.com
- Bailey Pumfleet
- Peer Richelsen
Investors backing Cal.com
- OSS Capital
- Sequoia
- Peter Thiel
Frequently asked questions
What does Cal.com do?
Calendar booking — like Calendly, but open source, self-hostable, and built for developers. Embeds into your product, fully customizable.
Where is Cal.com based?
Cal.com is based in Berlin, Germany.
When was Cal.com founded?
Cal.com was founded in 2021.
How much has Cal.com raised?
Cal.com has raised $32M in their Series A round as of Jul 2025.
Who founded Cal.com?
Cal.com was founded by Bailey Pumfleet, Peer Richelsen.
Who has invested in Cal.com?
Cal.com is backed by OSS Capital, Sequoia, Peter Thiel.
How Cal.com would pitch themselves
○ Auto-generated01Target customer
Developers + open-source communities + enterprises wanting an OSS-first tool in this category, with optional commercial support.
02Problem they solve
Calendar booking — like Calendly, but open source, self-hostable, and built for developers. Embeds into your product, fully customizable. The category has historically been served by tools that miss the modern workflow this product is built around.
03Key differentiator
Cal.com differentiates on open-source scheduling infrastructure. Backed by OSS Capital + Sequoia, $32M raised — the company has resources + validation to compound this thesis. Founded by Bailey Pumfleet + team.
04Go-to-market strategy
Series-A scaling stage — building outbound sales motion, hiring first AEs, layering on customer success. Mix of PLG (where the product allows) + direct sales for higher-ACV deals.