Cal ID
Cal ID is a cloud-based scheduling platform designed to streamline appointment booking and manage calendars for professionals and teams. The tool offers unlimited scheduling links, full customization of booking pages, and deep integrations with major apps like Google Calendar, Outlook, Zoom, Slack, and payment systems. It allows hosts to create multiple event types with different durations and rules, set up round-robin or collective scheduling for team availability, and automate reminders and follow-ups to reduce no-shows. The software supports multi-calendar sync so users can manage work, personal, and shared calendars in one place, and provides analytics on bookings, attendance, and conversion trends. Cal ID positions itself as a no-cost alternative with a free-forever plan offering key functionalities and an open source foundation that allows self-hosting or contributions.
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Zoom Scheduler
Zoom Scheduler is an online appointment scheduling platform that helps individuals and businesses automate meeting bookings, manage calendar availability, and coordinate appointments. The software enables users to create customizable booking pages where clients, colleagues, and prospects can select available meeting times without exchanging scheduling emails. It supports one-on-one appointments, group sessions, round-robin team scheduling, collective meetings, and scheduling polls. Zoom Scheduler integrates with Google Calendar, Microsoft 365, and Zoom Calendar to synchronize availability and prevent scheduling conflicts. Its automation capabilities include email and SMS reminders, meeting confirmations, rescheduling, cancellation management, and automatic video meeting link generation. Additional features include branded booking pages, lead qualification forms, Salesforce integration, appointment analytics, and payment collection through Stripe.
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CalendarHero
Skip the “when are you free?” dance with a scheduling platform that helps you save time and customize your meeting workflow. Set up is easy — CalendarHero (formerly Zoom.ai) syncs with your Google or Microsoft calendars automatically, so you can book meetings right away. CalendarHero gives you flexible meeting scheduling methods: Share your scheduling link in an email, request a group meeting in Zoom.ai, embed Zoom.ai on your website, create a meeting directory page, or add CalendarHero directly to your inbox or chat platform including Gmail, Microsoft Teams, and Slack. For 1:1 meetings, your invitees can pick a time to meet from your real-time availability. And for group meetings, CalendarHero intelligently finds the best time to meet based on everyone’s mutual availability. CalendarHero supports 1:1, group, internal/external, collective, round-robin, and on-behalf availability.
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Cartoply
Cartoply is a Calendly-style scheduling platform with one key difference: location-based routing. When a guest books, Cartoply can automatically match them to the right team member based on service territory — a capability Calendly doesn't offer. Hosts create event types, define availability, and share a public booking link; guests pick an open slot in seconds. Organizations get round-robin and territory-based assignment, reusable member groups for more complex routing, buffers, daily booking limits, custom intake questions, and pre-qualification rules to keep calendars under control. Native Google/Outlook sync and Zapier integration keep everything connected, and teams can collect payment upfront via Stripe or PayPal with automatic refunds on cancellation.
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