What is Kalendar.work?

Kalendar is a free, open-source scheduling tool that replaces paid services like Calendly and Cal.com. It lets you create booking links, manage availability, and accept meetings without per-seat pricing, artificial limits, or hidden costs. Custom branding, unlimited event types, and two-way calendar sync are all included at no charge. Built on Founding.dev, Kalendar is designed to be owned and extended, not rented month-to-month.

Who it's for

• Freelancers and solopreneurs who need professional scheduling without monthly subscription fees eating into their margins
• Small to mid-size teams that want unlimited event types and custom branding without per-user pricing or feature gates
• Developers and tech-savvy users who prefer open-source tools they can self-host, customize, and integrate into their own workflows

Key features

Custom Branding

Apply your own brand colors, logo, and identity to your booking page. No need to pay extra for a professional look — it's included free, unlike competitors that charge $15/month or more for the same capability.

Unlimited Event Types

Create as many meeting types as you need: 15-minute quick calls, one-hour consultations, full-day workshops, or anything in between. There are no limits on the number of event types, so your scheduling can grow with your business.

Two-Way Calendar Sync

Connect Google Calendar or Outlook, and Kalendar automatically creates events when someone books. Busy time blocks are respected, so double-booking is avoided without manual effort.

Custom Email Notifications

Send branded confirmation emails, reminders, and follow-ups that match your voice. You control the content and timing, giving attendees a polished experience without paying for a premium add-on.

What stands out

"Stop paying thousands for SaaS you could own."

Kalendar flips the typical SaaS model on its head. Instead of renting scheduling features at $15–30 per month per user, you get the same capabilities free forever. The open-source foundation means you can self-host, modify the code, and avoid vendor lock-in entirely. For teams that want control over their tools rather than being tied to a subscription, this is a fundamentally different approach.

Worth checking out if…

You're tired of paying monthly for scheduling software that limits event types, branding, or integrations unless you upgrade. Kalendar is especially relevant if you value open-source ownership, want to avoid per-seat pricing, or need a tool that can be adapted to your specific workflows over time. It's also a strong fit if you're exploring the Founding.dev philosophy of building and owning your own software stack instead of renting it.