
CEO of Cal.com Bailey Pumfleet: building an open source rocketship ("Stripe for Time") | ODF alum
About this episode
Cal.com CEO Bailey Pumfleet turned a side project into one of the most ambitious infrastructure companies ever.
His mission: powering a billion connections by 2031
Rather than just another Calendly alternative, they're building the "Stripe for Time" - scheduling infrastructure that powers everything from doctor's appointments to refugee services.
We get into:
[3:56] How startups get open source wrong
[10:46] Launching the v0 of Cal (called Calendso)
[24:32] Why open source is crucial for infrastructure companies
[36:30] The journey from MVP to enterprise-grade platform
[39:29] Building trust through radical transparency
[46:46] How their "longevity guarantee" wins enterprise deals
[47:15] Running a fully remote global team
[53:00] Handling compliance and security at scale
This is a must-watch for anyone building infrastructure, open source, or startups in general..
Enjoy!
Links mentioned:
ODF: explore starting a startup in SF and figure out co-founders, customers, and more at https://joinodf.com
StampList: browse breakout companies with a track record of sponsoring visas for exceptional talent at https://landing.club/stamplist
https://cal.com
https://x.com/BaileyPumfleet
https://x.com/peer_rich (Bailey's co-founder)
https://x.com/julianweisser
The Deep End is available on YouTube and other podcasting platforms:
https://www.youtube.com/watch?v=V2Pripb427E
Apple: https://podcasts.apple.com/us/podcast/the-deep-end-by-odf/id1568752165
Spotify: https://open.spotify.com/show/4TWOlf80GM1Pml8fGUO8KK
Get every episode summarized
Each time The Deep End by ODF publishes, we email you a written briefing from the transcript — the topics, who appeared, and any specific claims, with the ad reads skipped.
Email me new episodesFree for 3 shows. No card needed.
Hosts & guests
No transcript yet
This episode has not been transcribed. Request it and it moves to the front of the queue.
More episodes
More from The Deep End by ODF

Eoghan McCabe: moving to America to build Intercom into a unicorn + the benefits...
The Deep End by ODF

Deep Dive: Find the right co-founder and idea with Mo El Mahallawy, CTO and co-f...
The Deep End by ODF

Deep Dive: Shutting down a startup, doing right by your team, and founder identi...
The Deep End by ODF

Control Your Financial Destiny: Runway, Metrics, and more with Puzzle's CEO Sash...
The Deep End by ODF