
Calendly
Acuity Scheduling
TidyCal
zcal
SavvyCal
SetMore
SimplyBook.me
Cal.com (formerly Calendso) is the open source Calendly alternative.

Retell AI
Bland AI
Smith.ai
Bolna
Deepgram
Voiceflow
Goodcall
Voice AI Infrastructure for the Internet

Which is more popular?
Based on our record, Cal.com should be more popular than Vapi. It has been mentioned 60 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | cal.com | vapi.ai |
| Pricing | — | |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of Vapi yet.
Walkthroughs and reviews on video.
What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages
More videos
Exploring Vapi A Quick Review - Discuss what is needed to compare to Air.Ai
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Cal.com and Vapi. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


The honest read: if you're leaving Acuity because your business outgrew simple scheduling — you need deposits, add-ons, multiple staff and locations, and ideally a booking site you own — Opencals is built for exactly...
I tried using https://cal.com for a bit but ended up just switching over to https://zcal.co and it has been great so far. All these other scheduling tools end up trying to do too much and always seem to end up a bit...
Developers shouldn’t have to guess what happens to their conversations once they hit the platform. With Vapi and Retell, “ownership” often comes with strings attached. SigmaMind AI takes the opposite stance: your data...
Iâd recommend Vapi if you are planning to create advanced AI meeting agents. It is great for creating custom flows and integrates easily with all of your databases, CRMs, and knowledge bases.
Vapi is a San Francisco-based AI Voice Agent Development Agency founded 2023. This company is well-known for its developer-first platform that supports businesses to deploy their own AI voice agents. Vapi is one of...
Recommendations tracked on public social media and blogs since March 2021.


Then for the component library, I was really into coss ui. I stumbled upon it randomly one day and loved it so much. My Nathan's AI project already had a UI heavily inspired by cal.com: send button, message suggestions... So when I saw... - Source: dev.to / 8 months ago
I keep coming back to what would have happened if I didn't have a strong technical understanding of how calendar technology works — the difference between local and cloud calendars, what an ICS feed is, why enterprise auth blocks... - Source: dev.to / 8 months ago
Plausible brought open source to web analytics. Cal.com did it for scheduling. Formbricks did it for surveys. PostHog did it for product analytics. Quackback does it for feedback collection. - Source: dev.to / 8 months ago
The Vapi platform helps developers build and deploy voice agents and AI products in Python, React, and TypeScript. It provides two ways to make intelligent voice apps. It's assistant's option allows you to create simple conversational... - Source: dev.to / 8 months ago
It can make/take phone calls[0], but they need to be prompted on the nature of the call, the data they need, and how to collect it. They can also output the results of the call via API. An AI agent from Masterworks recently called me... - Source: Hacker News / 9 months ago
### Resources **VAPI Documentation:** [vapi.ai/docs](https://vapi.ai/docs) – Voice agent API, webhook integration, real-time call transcription, intent detection endpoints, assistant configuration, function calling. **Twilio Voice... - Source: dev.to / 10 months ago
When comparing Cal.com and Vapi, you can also consider the following products.

Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Compare Calendly to Cal.com or Vapi:

API that enables developers to build human-like voice agents
Compare Retell AI to Cal.com or Vapi:

Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Compare Acuity Scheduling to Cal.com or Vapi:


Optimize your schedule with custom booking pages and calendar integrations
Compare TidyCal to Cal.com or Vapi:

Smith.a is one of the best virtual receptionist and chat services that offer phone calls, answer chats and take messages for you and your staff.
Compare Smith.ai to Cal.com or Vapi: