# Peer Richelsen

> Peer Richelsen is co-founder of Cal.com. Cal.com API v2 + MCP on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/peer-richelsen/
- Markdown: https://www.anchorterminal.com/people/peer-richelsen/index.md (~1,050 tokens)
- Slim: https://www.anchorterminal.com/people/peer-richelsen/index.min.md (~830 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/people/peer-richelsen/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Co-founder, Cal.com.

Peer Richelsen co-founded Cal.com, which began as the open-source side project Calendso. His 2023 Series A memo set the company's goal of connecting a billion people by 2031 through calendar scheduling.

- X: https://x.com/peer_rich
- GitHub: https://github.com/PeerRich

## What Peer builds

- [Cal.com API v2 + MCP](https://www.anchorterminal.com/tools/cal-com.md), graded C, 57.2/100, in Calendars & scheduling. Scheduling API behind Cal.com's booking pages. Co-founder, Cal.com, researched 2026-10-28.

## Backed by

- [OSS Capital](https://www.anchorterminal.com/investors/oss-capital/)
- [Remote First Capital](https://www.anchorterminal.com/investors/remote-first-capital/)
- [Tribe Capital](https://www.anchorterminal.com/investors/tribe-capital/)
- [On Deck](https://www.anchorterminal.com/investors/on-deck/)
- [Naval Ravikant](https://www.anchorterminal.com/investors/naval-ravikant/)
- [James Beshara](https://www.anchorterminal.com/investors/james-beshara/)
- [Liu Jiang](https://www.anchorterminal.com/investors/liu-jiang/)
- [Chad Hurley](https://www.anchorterminal.com/investors/chad-hurley/)
- [Tod Sacerdoti](https://www.anchorterminal.com/investors/tod-sacerdoti/)
- [Balaji S. Srinivasan](https://www.anchorterminal.com/investors/balaji-s-srinivasan/)
- [Neha Narkhede](https://www.anchorterminal.com/investors/neha-narkhede/)
- [Eliot Horowitz](https://www.anchorterminal.com/investors/eliot-horowitz/)
- [Job van der Voort](https://www.anchorterminal.com/investors/job-van-der-voort/)
- [Harini Janakiraman](https://www.anchorterminal.com/investors/harini-janakiraman/)
- [Glenn Solomon](https://www.anchorterminal.com/investors/glenn-solomon/)
- [Alex Bouaziz](https://www.anchorterminal.com/investors/alex-bouaziz/)
- [Guillermo Rauch](https://www.anchorterminal.com/investors/guillermo-rauch/)
- [Cassidy Williams](https://www.anchorterminal.com/investors/cassidy-williams/)
- [Paul Copplestone](https://www.anchorterminal.com/investors/paul-copplestone/)

## Questions

### Who is Peer Richelsen?

Peer Richelsen co-founded Cal.com, which began as the open-source side project Calendso. His 2023 Series A memo set the company's goal of connecting a billion people by 2031 through calendar scheduling.

### What does Cal.com make?

Anchor Terminal lists Cal.com API v2 + MCP from Cal.com. Scheduling API behind Cal.com's booking pages.

### Who has invested in Cal.com?

The sources our research read name OSS Capital, Remote First Capital, Tribe Capital, On Deck, Naval Ravikant, James Beshara, Liu Jiang, Chad Hurley, Tod Sacerdoti, Balaji S. Srinivasan, Neha Narkhede, Eliot Horowitz, Job van der Voort, Harini Janakiraman, Glenn Solomon, Alex Bouaziz, Guillermo Rauch, Cassidy Williams and Paul Copplestone.

### How are Peer's tools graded?

Cal.com API v2 + MCP is graded C, 57.2 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://cal.com/about
- https://cal.com/scheduling/customer-support
- https://github.com/PeerRich
- https://cal.com/blog/series-a-memo
- https://github.com/calcom

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.

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