OpenSwap
Specimen · calcom/cal.diy
OPEN SOURCE

Cal.diy (formerly Cal.com)

Replaces Calendly

License stamp
Open source. MIT (OSI-approved, whole repository)
GitHub says
MIT
Self-host difficulty
●●●○○ 3 distinct container images in its compose file. Provisional, see how we score.
Activity
★ 49,873 stars · last push 2026-11-03 · checked 2026-11-10
Repository
github.com/calcom/cal.diy
GitHub description
"Scheduling infrastructure for absolutely everyone."

Repository moved from calcom/cal.com to calcom/cal.diy; confirmed active on the new name (last push 2026-11-03)

Self-host vs Calendly

Example values: replace every number with your own. SaaS price prefilled from Calendly pricing, checked 2026-11-10; the other numbers are examples.

Self-hosting saves about $780 a year for 20 seats: SaaS $2,400 vs self-host $1,620 (server $144, backups $36, admin time $1,440). Break-even at about 14 seats at these numbers.

Admin hours start from our guess for difficulty 3 and are yours to edit. Calendly price: $10 per user per month (Standard plan, billed annually). Standard $10/seat/mo billed yearly; Teams $16/seat/mo billed yearly; Enterprise from $15,000/yr. Source: vendor pricing page, checked 2026-11-10.