The short answer
Evaluate Acuity when a booking is part of a paid service with intake and repeat appointments. Compare hosted Cal.com for your current scheduling and integration requirements. Treat Cal.diy as a separate self-hosting decision that needs technical ownership. If meeting coordination and team routing are already working in Calendly, first establish which specific limitation a move would solve.
Research-based decision guide. Vendor documentation checked September 10, 2026. This is not a hands-on product test. Read our disclosure.
First, define what a booking means
A calendar link can represent a sales conversation, a paid consultation, or a recurring service appointment. These share a time slot but have different operating requirements. The useful comparison starts before someone clicks “book” and continues after the meeting ends.
For a sales meeting, the difficult part may be routing the visitor to the right person. For a service appointment, it may be collecting intake information, handling a deposit, and managing a cancellation. For a technical team, the priority may be control over the software’s deployment.
Write down your current failure in one sentence. Examples include “clients cannot buy a package and book their sessions” or “we cannot distribute enquiries the way our team works.” That sentence becomes your trial’s pass condition.
A shortlist organized by the job
| Booking workflow | Candidate to evaluate | What to verify first |
|---|---|---|
| Client appointments with intake and repeat visits | Acuity Scheduling | Packages, payment handling, staff calendars, and required plan |
| Hosted scheduling with specific integration needs | Cal.com | Current hosted plan and the exact integration behavior |
| Self-managed scheduling with technical ownership | Cal.diy | Feature availability, maintenance, hosting, and security responsibilities |
| Meetings distributed across a sales team | Calendly as a baseline | Routing, reassignment, CRM handoff, and calendar conflicts |
This table is a research shortlist, not a ranking from hands-on testing. A candidate that looks suitable still needs to pass your own workflow rehearsal.
Acuity for a service appointment workflow
Acuity’s feature page describes intake forms, client profiles, appointment types, classes, packages, and payment-related features. Those are useful things to investigate if booking is the front door to a paid service.
Build one representative appointment and follow it all the way through. Have a colleague complete the intake form, book, reschedule, and cancel. Inspect what the client receives and what appears in your records. Then test the exceptional case: a deposit, package redemption, or staff absence.
Check plan restrictions and payment processor requirements before deciding. “Accepts payments” does not tell you how a refund works, whether a processor is available in your country, or which costs apply. Our Calendly vs Acuity comparison explores the workflow distinction in more detail.
Cal.com and Cal.diy are separate choices
Cal.com’s April 2026 announcement distinguishes its private production code from Cal.diy, the open-source, self-hostable community version. The announcement also says that commercial and enterprise features were removed from Cal.diy.
That distinction matters if you are reading an older “open-source Calendly alternative” list. Do not assume a self-hosted installation includes the same team features as a current hosted subscription.
For hosted Cal.com, evaluate the actual plan you would use. For Cal.diy, name the person who will handle updates, uptime, backups, email delivery, and incidents. Self-hosting can change where responsibility sits; it does not remove operational work. A solo consultant without technical support should include that work in the decision rather than treating hosting as free software.
Keep Calendly as the control in your trial
Calendly’s scheduling overview describes connected calendars, event types, routing, and team scheduling capabilities. Use your current setup as a baseline and compare only the workflows you need to improve.
If the problem is an overly long booking form or confusing availability, changing the tool may simply reproduce it. Try shortening the form, changing buffers, or clarifying appointment types first. A migration should earn its disruption.
A booking test you can repeat
Use a real calendar connected to a test event, without publishing the link to customers yet.
- Create two event types with different durations and buffers.
- Add a calendar conflict and confirm the time disappears from availability.
- Book from a different time zone and inspect every confirmation.
- Reschedule and cancel; check both calendars and reminder behavior.
- Test the information passed to your CRM or client record.
- If payments matter, use the processor’s supported test mode and inspect cancellation handling.
- Export the booking information and document how you would leave the tool.
When you switch, inventory every old booking link: email signatures, website buttons, automated messages, and proposals. Keep the previous service available long enough to manage existing appointments. A polished new page does not help if half your clients still reach an abandoned calendar.
Sources & verification
These primary sources support product descriptions. Plan details can change; check the vendor’s current terms before buying.
- Calendly scheduling capabilities ↗Checked September 10, 2026
- Acuity Scheduling features ↗Checked September 10, 2026
- Cal.com announces Cal.diy and the production code change ↗Checked September 10, 2026
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