Calendly or Cal.com: which booking tool should you choose, and what about clients who call?

As of 1 October 2026, Calendly’s pricing page presents a Free plan “for personal use”: a single event type, one connected calendar, customisation of availability and of the booking page, and the browser extensions. Unlimited event types, connecting several calendars, automated reminders and taking payment via Stripe or PayPal start with the Standard plan. The free plan therefore suits anyone who offers a single appointment format, for example an initial thirty-minute conversation.

Cal.com draws the line elsewhere: its free plan is limited to one user, but that user gets unlimited event types and calendars, email and SMS notifications, payment collection via Stripe and PayPal, and one-click import of Calendly events. A freelancer who sells several services will find more room there without paying; as soon as several people need to share availability, a team plan is required.

Other free options exist. With a personal Google account, Google Calendar lets you create a single booking page through its appointment schedules. zcal promotes a “Free Forever” plan with unlimited invite links and calendar sync. TidyCal offers a free plan as well as a lifetime licence listed at $29 as of 1 October 2026, sold on AppSumo.

At Calendly, the French-language pricing page shows its prices in dollars, per licence per month: Standard at $10 billed annually or $12 billed monthly, Teams at $16 annually or $20 monthly. The page also provides a euro price list with the same amounts (€10 and €12 for Standard, €16 and €20 for Teams). Enterprise starts at $15,000 a year, from 50 licences, and is only available in dollars. A licence is only needed for those who connect a calendar and receive appointments; your clients do not need one. No mention of whether tax is included accompanies these prices.

At Cal.com, the pricing page shows prices in dollars, per user per month, billed annually: Teams at $12, Organizations at $28, each with a 14-day free trial; Enterprise is priced on request and billed annually. The page gives no monthly price without an annual commitment and does not state whether tax is included. Teams notably adds shared availability, distribution of bookings among colleagues, routing forms and removal of Cal.com branding.

For a single person who wants several appointment types, Cal.com stays free where Calendly requires the Standard plan. For a team, the comparison is case by case: number of people, need for monthly or annual billing, team features you will actually use. Check the amounts on the day you subscribe, as they may change.

On 14 April 2026, Cal.com announced on its blog that it was moving to closed source, citing security concerns over AI tools capable of searching public code for vulnerabilities. The GitHub repository calcom/cal.com now redirects to calcom/cal.diy: Cal.diy is a community edition under the MIT licence, to be installed on your own servers. It keeps the scheduling engine and the app library, but not teams, organisations, workflows, routing forms or SSO. Its README states that it is “strictly recommended for personal, non-production use” and points commercial users to hosted Cal.com or to on-premise enterprise access through the sales team.

On hosting, each vendor states its own choices. Calendly says it stores user and invitee data in data centres located in the United States, run by Google Cloud and AWS, and relies on the standard contractual clauses in its data processing agreement for data coming from the European Economic Area. Cal.com’s privacy policy, in force since 20 August 2026, specifies that the company is American, that data is processed in the United States, and that EU data residency can be requested by email. Its pricing page mentions a choice of US or EU hosting for the Organizations and Enterprise plans only, but Cal.com has announced the closure of Cal.eu, its Europe-hosted platform, on 1 November 2026, unless an extension is provided for in Enterprise customers’ contracts.

On compliance, Cal.com’s dedicated page claims ISO 27001 certification, a SOC 2 Type II audit renewed every year and GDPR compliance; the audit reports can be viewed in its trust centre after accepting a non-disclosure agreement. Calendly cites its hosting providers’ standards, including ISO 27001 and SOC 2. If hosting in Europe is a requirement for you, put the question to the vendor in writing before you commit.

A booking link only serves the clients who open it. Someone who dials your number while you are busy usually reaches voicemail, and the Calendly or Cal.com page makes no difference to that. For this client to get a slot too, someone, or something, has to answer and enter the appointment in the same calendar as the online page.

That is the role of an AI voice agent, provided it is connected to the calendar. Alyas connects to Cal.com and to Google Calendar; it does not connect to Calendly. With Cal.com, the agent offers the slots from your calendar over the phone and books the appointment into it. If you stay on Calendly, Google Calendar could act as a bridge: Calendly checks for conflicts in the connected calendars you ask it to check, and Alyas enters its appointments in a Google Calendar once that calendar is connected to Alyas. An appointment booked by Alyas in a Google Calendar that Calendly checks for conflicts should therefore no longer be offered as free on your Calendly page; test this setup before relying on it.

Cal.com, for its part, offers Cal.ai: calls made by an AI agent and triggered by its workflows, for example after a form, after a no-show or before a meeting, billed at $0.29 per minute according to its page as of 1 October 2026, with credits included in the Teams and Organizations plans. Alyas, on the other hand, is designed to answer incoming calls, 24 hours a day: it announces that it is an AI and that the call is recorded, provides information based on your website, a text or a PDF, takes down contact details, transfers to your number if the caller asks, and sends you the transcript and summary, which are hosted in the EU. It does not send text messages and does not take payments.