Apps similar to zcal include Thunderbird Appointment, which is free and open source. Other options are Cal.com, Notion Calendar, Doodle and Calendly. There's no shortage of Appointment Schedulers like zcal, with more than 50 alternatives for the web, Android, iPhone, self-hosting and Mac.
Designed for busy professionals who need fast, flexible scheduling. Aivee Booking uses AI and Smart Prompt Scheduling to instantly find the ideal time for your 1-on-1 meetings — all from a single, one-off link.
Singapore
Whether you're on a call, chatting, texting, or emailing back and forth, sometimes it's easier to jump on a web conference or schedule a call. With i.help, skip all the steps and say, "go to i.help/yourname.".
Swiss scheduling and event-registration tool for clubs, teams, municipalities and private groups. Create date polls or custom sign-ups, collect choices and quantities, invite participants without accounts, export results, send calendar files and use optional Pro teamwork.
Switzerland
Simplisik Booking is an appointment scheduling platform designed for small businesses, consultants, therapists, sales teams, and service professionals who want to eliminate scheduling back-and-forth without the complexity of enterprise solutions.
United States
Cal24h is a Swiss-hosted online appointment scheduling software for independents, practices, and teams.
Switzerland
Timetics is an AI-powered scheduling tool for online and offline meetings and events. Get personalized meeting recommendations, seat arrangements, event management, and more.
Hibox Scheduler is a completely free, cloud-based alternative to Calendly, Acuity Scheduling and other booking apps. No user or feature limitations. We host for you so no need to implement any code.
Spain
EU
Cale is an API-first appointment scheduling system that integrates easily with your application, providing businesses with a reliable way to manage reservations. It supports multi-tenancy, allowing you to handle multiple clients or environments (such as testing and production)...
Zencal is like Calendly, but free and with better teamwork. It allows you to add multiple teams and sync everyone’s calendars. It's easy to sell meetings as a subscription and multiple meetings in a batch.
PolandEU
