Can I open-source OnceHub?
KINDA · partial or early alternativesKinda. Cal.com cover the core of OnceHub, but they're early or partial — expect gaps like routing depth, calendar integrations, CRM workflows, and dependable scheduling and multiple calendar providers.
People still pay for OnceHub because people pay because one double booking or missed invite can cost more than years of subscription fees. The recurring cost buys OAuth refresh, webhooks, timezone databases, race conditions, reminders, deliverability, privacy, and uptime, not just the visible interface.
xrouting depth, calendar integrations, CRM workflows, and dependable scheduling
xmultiple calendar providers
xteam routing and round-robin
xpayments
xtimezone edge-case maturity
These projects already replace it, free.
CCal.comOpen scheduling infrastructure with booking pages, round-robin, routing forms, and app integrationsopen source↗What each one is, in full: Cal.com
no votes, no pay-to-list · just what's real
OnceHub pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| basic | $0/user | $0/user | 1 user; 1 calendar; 1 booking link; 6 weeks of analytics/activity history. |
| schedule | $12/user | $10/user | Unlimited booking links, calendars, and meetings; 1 phone number. |
| route | $23/user | $19/user | Unlimited routing forms and responses; 2 phone numbers. |
| engage | $47/user | $39/user | Unlimited chatbots and conversations; 3 phone numbers. |
| enterprise | custom | — | Designed for 30+ users; Security & Compliance add-on included. |
free tier1 user; 1 calendar; 1 booking link; 6 weeks of analytics/activity history.
billingmonthly + annual (about -17%); Enterprise custom
hidden costsSecurity & Compliance costs $6/user/month monthly or $5/user/month annually outside Enterprise; extra phone numbers cost $4/month; SMS uses separately purchased credits.
verified 2026-08-14 · source ↗
Can I open-source OnceHub?
Kinda. Cal.com covers the core of OnceHub, but there are real gaps: routing depth, calendar integrations, CRM workflows, and dependable scheduling, multiple calendar providers. Read the honest list above before committing.
How much does OnceHub cost?
OnceHub costs about $12/month (Schedule, checked 2026-07-31), which is $144 per year.
What do I lose by replacing OnceHub?
Honestly: routing depth, calendar integrations, CRM workflows, and dependable scheduling; multiple calendar providers; team routing and round-robin; payments; timezone edge-case maturity. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to OnceHub?
Yes: Cal.com (Open scheduling infrastructure with booking pages, round-robin, routing forms, and app integrations)