Cal ID is a fully open-source scheduling tool for solos and teams, with unlimited meetings, comprehensive integrations, real human support – and amazing features shipping at lightspeed.
Cal ID has made appointment scheduling much easier for my workflow. The platform is simple, clean, and quick to set up. I especially like the custom scheduling options and the automatic reminders through email and WhatsApp, which help ensure clients don’t miss their appointments.
What needs improvement
event pricing would be a nice feature (1)custom branding (1)
Many scheduling tools lock important features behind paid plans. Cal ID offers many advanced capabilities even in its free version, including multiple event types, integrations, and automation.
Most competitors:
Limit free plans
Charge for integrations or workflows
Cal ID focuses on providing a full - feature experience without forcing upgrades early.
Cal ID has quickly become my primary scheduling hub for sales calls, demos, and coaching sessions. It solves the classic “back-and-forth on WhatsApp/Email” problem by giving me clean booking links, multi-calendar sync, workflows, and automated reminders in one place.
What needs improvement
UI/UX Still Has Room to Improve
While the interface is generally clean, some parts of the UI can feel a bit cluttered or not as polished as older competitors. Other reviewers also mention that the UI could be refined further to match the smoothness of tools like Calendly.
For very non-technical users, the first-time setup of advanced features (workflows, routing, team events) can feel slightly overwhelming.
Cal ID has completely streamlined the way I manage and share my availability. The custom schedules are incredibly flexible, and the minimalist design makes everything feel smooth and clutter-free. Setting up meetings is effortless, and the built-in workflow automation saves a lot of back-and-forth. It’s one of those tools that quietly becomes essential to your daily workflow.
vs Alternatives
I chose Cal ID because it offers the right balance of simplicity and powerful scheduling features. The interface is clean, fast, and easy to use, and the custom schedules give me much more control than most alternatives.
Ratings
Ease of use
Reliability
Value for money
Customization
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Launch websites with enterprise needs at startup speeds.
@dmitry_bergelson Hey Dmitry, I took your advice quite seriously. The launch is going good, plus we're getting a good response on the features we discussed.
Thanks for supporting!
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Unlimited meetings without throttling emails or API usage? Clarify what “unlimited” really covers.
Yep, truly unlimited - no caps on meetings, events, or API calls. You can schedule as much as you need without hitting any throttling.
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Nice standalone booking tool from the looks. What is the primary niche or approach? Online inbound leadgen focused sales teams, coaching and consulting?
@dgtldan Thanks, Daniel! So the nature of Cal ID is very flexible. It could be used by anyone who wants to make their booking flow smooth, look professional, and save time. But yes, for coaches and consultants, the payment collection feature is really useful.
People who monetize their calls can easily collect payments right on their booking page itself.
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Impressive!
Any plans for branding kits, fonts, color tokens, and saved themes across teams?
Thank you @prince_tari, really glad you asked that!
Yes, multiple saved themes and team-wide branding presets are definitely on our roadmap. Right now, you could customize the booking page's header, logo, and colors.
A little off topic, but – Is there a specific workflow or setup you’d want to save and reuse across team members? That would help us shape it better!
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Truly amazing tool Rishab and his team has created there. I was actually waiting for something to come along! I love that it is fully open source and the team is truly delivering in light speed. Keep it up!!! Would love to see more from you guys.
@klemens_dreesbach Thank you so much! We’ve put our heart into building Cal ID to be open, fast, and truly meaningful for everyone who uses it. Your words really mean a lot to the entire team.
Extrovert
Cal ID
@dmitry_bergelson Thanks a lot! 🙏 We’re really hoping Cal ID makes scheduling with multiple participants a breeze 😎 Your support means a lot!
Cal ID
@dmitry_bergelson
Hey Dmitry, I took your advice quite seriously. The launch is going good, plus we're getting a good response on the features we discussed.
Thanks for supporting!
Unlimited meetings without throttling emails or API usage? Clarify what “unlimited” really covers.
Cal ID
Yep, truly unlimited - no caps on meetings, events, or API calls. You can schedule as much as you need without hitting any throttling.
Nice standalone booking tool from the looks. What is the primary niche or approach? Online inbound leadgen focused sales teams, coaching and consulting?
Cal ID
@dgtldan Thanks, Daniel!
So the nature of Cal ID is very flexible.
It could be used by anyone who wants to make their booking flow smooth, look professional, and save time. But yes, for coaches and consultants, the payment collection feature is really useful.
People who monetize their calls can easily collect payments right on their booking page itself.
Impressive!
Any plans for branding kits, fonts, color tokens, and saved themes across teams?
Cal ID
Thank you @prince_tari, really glad you asked that!
Yes, multiple saved themes and team-wide branding presets are definitely on our roadmap.
Right now, you could customize the booking page's header, logo, and colors.
A little off topic, but – Is there a specific workflow or setup you’d want to save and reuse across team members? That would help us shape it better!
Truly amazing tool Rishab and his team has created there. I was actually waiting for something to come along! I love that it is fully open source and the team is truly delivering in light speed. Keep it up!!! Would love to see more from you guys.
Cal ID
@klemens_dreesbach Thank you so much! We’ve put our heart into building Cal ID to be open, fast, and truly meaningful for everyone who uses it. Your words really mean a lot to the entire team.
Flookup Data Wrangler
Congratulations on the launch.
I believe the fact that it is fully open source will bring you much success amongst solo founders like me.
Cal ID
@getflookup We believe open source is the right way to build. It keeps us accountable, transparent, and closer to the people we're building for.
And since you're a solo founder, what would be the one thing you'd like to see in the roadmap? We're always listening 👀
@rishabh_pandram Congrats on the launch! Excited to see what you're building :)
Cal ID
@ishwari_wani Thanks a lot, Ishwari! Really appreciate the support