Cal.com
Cal.com is the open-source Calendly alternative that gives you full control over your scheduling infrastructure. With a self-hosting option, a workflow automation engine, and deep integrations with every video conferencing tool, Cal.com is used by over 3 million people for booking meetings. Built transparently in public with 30,000+ GitHub stars.
- Location
- San Francisco, USA
- Raised
- $25M
- Stage
- Series A
- Founded
- 2021
- Category
- SaaS
- Funding
- VC-backed
- Team
- 50–100
Funding figures as of Jul 2025 · not independently verified
Founders of Cal.com
- Peer Richelsen
- Bailey Pumfleet
Investors backing Cal.com
- Tiger Global
- Uncork Capital
- Altimeter Capital
Frequently asked questions
What does Cal.com do?
Cal.com is the open-source Calendly alternative that gives you full control over your scheduling infrastructure. With a self-hosting option, a workflow automation engine, and deep integrations with every video conferencing tool, Cal.com is used by over 3 million people for booking meetings. Built transparently in public with 30,000+ GitHub stars.
Where is Cal.com based?
Cal.com is based in San Francisco, USA.
When was Cal.com founded?
Cal.com was founded in 2021.
How much has Cal.com raised?
Cal.com has raised $25M in their Series A round as of Jul 2025.
Who founded Cal.com?
Cal.com was founded by Peer Richelsen, Bailey Pumfleet.
Who has invested in Cal.com?
Cal.com is backed by Tiger Global, Uncork Capital, Altimeter Capital.
How Cal.com would pitch themselves
○ Auto-generated01Target customer
Everyone — the core audience Cal.com's product is built around.
02Problem they solve
Cal.com is the open-source Calendly alternative that gives you full control over your scheduling infrastructure. With a self-hosting option, a workflow automation engine, and deep integrations with every video conferenc… 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 for everyone. Backed by Tiger Global + Uncork Capital, $25M raised — the company has resources + validation to compound this thesis. Founded by Peer Richelsen + 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.