The self-hosted Calendly alternative
Slotly: Self-hosted appointment booking that refuses a second booking for a slot already taken, even when two people try at the same moment. Own it once, run it on your own server, and stop paying Calendly every month.
Stop renting Calendly.
Slotly4 months of Calendly costs what Slotly costs once.
Buy onceHow we counted: Per-seat pricing - calculator assumes 3 staff seats x $10 = $30/mo (Standard billed yearly); monthly the same seats are $36. Re-read 2026-09-26 in both billing states: Standard is not one price both ways, as the 2026-09-03 row said - it is $12 monthly and $10 yearly (the page's 'Save 17%'). The free tier cannot model a multi-service business, and round-robin needs Teams at $16/seat/mo yearly ($20 monthly) - Slotly ships round-robin in the one-time price.
Calendly charges per seat, and every person who connects a calendar and hosts meetings needs one of their own.
“Seats are required for users to connect calendars and host Calendly meetings - meeting invitees do not require a seat.”, their own page, read 2026-09-26
Calendly can write up the meeting for you, turning a finished call into a recap and a drafted follow-up.
“Automate meeting recaps and pre-drafted follow-up emails”, their own page
If you need calendars to sync automatically with Google, Outlook, or Office 365, stay with Calendly — Slotly only knows about bookings made inside itself and does not sync external calendars.
What Slotly deliberately doesn't do is on its product page.
Why owning beats renting Calendly.
No monthly, per-seat or per-location fees. The license is perpetual.
It never lives in Calendly's cloud.
Records and users are limited by your hosting, not by a pricing tier.
Self-hosted software can't be sunset or repriced out from under you.
The fair trade-offs: you host it, back it up and apply updates yourself. See the product page for its limits, and the full Slotly vs renting comparison.
Questions about moving off Calendly.
Does it take payment online?
What do automatic reminders need?
Can I run group classes?
MySQL or SQLite?
Related on this site
Sources
- Calendly: price checked 2026-09-26, source“Billed monthly Billed yearly Save up to 20% Free Always free ... One event type One calendar connection ... Standard ... $10 /seat/mo ... Save 17% ... Teams ... $16 /seat/mo ... Save 20% ... [Billed monthly] Standard ... $12 /seat/mo ... Teams ... $20 /seat/mo ... Enterprise Starts at $15k /yr…”
Competitor prices change, so always confirm on the linked page. We only print figures we could verify on the date shown. This vendor is tracked in the Price Observatory: every figure verbatim, dated, re-checked quarterly.