Zencal

Zencal is a web-based booking system, founded in Poland, that positions itself around selling services end-to-end rather than just scheduling meetings: bookings, payments, invoices, reminders, and analytics live in one tool. Payment collection is built in with 0% commission and supports Stripe and PayPal alongside European processors PayU, Przelewy24, and tPay, with automatic invoice generation on paid plans.

It syncs with Google, Outlook, and iCloud calendars and auto-creates meeting links via Google Meet, Zoom, Microsoft Teams, Webex, or Skype. Teams get round-robin routing and a shared team page, plus modules for group events, sellable service bundles, a lightweight client CRM, and revenue analytics. Developers can build on its API and webhooks, with Zapier, Make, and HubSpot integrations available.

There is no free plan — pricing is per user starting with a Light tier, behind a 14-day full-access trial with no credit card required. Zencal fits coaches, consultants, agencies, and service businesses — especially in Poland and Europe — that want commission-free payments and invoicing handled in the same place as their scheduling.