Cal.com vs OnceHub Comparison 2026
Cal.com's free plan covers one user with no cap on event types, calendars or bookings, plus Stripe and PayPal built in. OnceHub's free Basic plan holds a single user to one calendar and one booking link, though it throws in a page designer, approvals and an MCP server for AI booking. The feature nothing else here has is OnceHub's dedicated phone number, attached to a booking from the Schedule plan at $10 a seat a month. Pay for OnceHub only if that phone number or its routing between team members is the actual job.
At a glance
- OnceHub starts cheaper, at $10.
- Both have a genuinely free tier.
Side by side
Cal.com | OnceHub | |
|---|---|---|
| Starting price (they differ) | From $12 | From $10 |
| Pricing model | Free plan, paid tiers | Free plan, paid tiers |
| Free tier | Yes | Yes |
| Billing | Monthly or annual | Monthly or annual |
| Free trial | 14 days | 14 days |
| API |
Cal.com
Open-source scheduling you can host yourself
Cal.com does what Calendly does and publishes its source, which matters to anybody who wants booking on their own domain and their own database. The individual plan is free with no meeting cap. Self-hosting is real rather than theatre, though it is a weekend rather than an afternoon.
Our note
Taking payment for calls is free here and is a paid feature almost everywhere else. That single difference is the reason most people switch.
Only on this side
- Covers project management
OnceHub
Scheduling with a phone number attached
OnceHub does the booking page and the routing every scheduler does, then hands the booking a dedicated phone number, so a call that was always going to happen on the phone gets booked and dialled from one record. Free covers one link and one calendar. Past that it is priced per seat, and the routing tier costs about twice the basic one.
Why people weigh these two
- OnceHub instead of Cal.com
- OnceHub adds a phone number to the booking flow, with a free tier and paid from $10 against Cal.com's $12.
- Cal.com instead of OnceHub
- Cal.com is open source and can be hosted yourself, from $12 with a free tier.
Which one should you pick
Take Cal.com for plain scheduling, because the free plan already does it without a cap. One user gets unlimited event types, calendars and bookings, plus Stripe and PayPal payments, all for nothing. Self-hosting is available too if booking on your own domain matters more than the phone integration OnceHub offers.
Take OnceHub if meetings still start on the phone, or a small team needs enquiries routed to the right person automatically. Schedule at $10 a seat a month is the plan that removes the one-link, one-calendar cap and adds a dedicated phone number, Stripe payments and CRM connections; Route at $19 layers on screening and distribution across a team. Without that phone or routing need, Cal.com and Calendly both do plain scheduling for less.
Common questions
- Which free plan holds more?
- Cal.com's. It covers one user with no cap on event types, calendars or bookings. OnceHub's free Basic plan limits a user to one calendar and one booking link, so a second link needs the paid Schedule plan at $10 a seat a month.
- What does OnceHub have that Cal.com does not?
- A dedicated phone number attached to a booking, from the Schedule plan onward, so a call that was always going to happen on the phone gets booked and dialled from one record. Cal.com's listing does not mention a phone feature at all.
- Is OnceHub worth paying for over Cal.com's free plan?
- Only if the phone number or the routing between team members is actually needed. For plain scheduling, one link and one calendar reading availability, Cal.com already does that for nothing, while OnceHub's free plan caps at a single booking link.
- Can I take payment for a booking on either free plan?
- Cal.com's free plan includes Stripe and PayPal already. OnceHub's free Basic plan does not mention payments; Stripe arrives with the paid Schedule plan at $10 a seat a month.
Ratings are the average of reviews readers left. The facts are stated by each tool’s own listing and are not verified by CloutStack. How we make money.