SavvyCal

Cal.com

Cal.com is an open-source scheduling infrastructure designed for individuals and teams. It provides a robust and customizable solution for managing schedules, appointments, and meetings. With its open-source nature, Cal.com offers flexibility and scalability, making it an ideal choice for businesses and organizations of all sizes.

Cronofy

Cronofy provides calendar and scheduling infrastructure that other SaaS applications embed to control availability, coordinate meetings and capture what happens in them. Its APIs offer two-way calendar synchronization across Google, Microsoft, Apple and on-premise Exchange calendars with real-time push notifications when events change. Beyond sync, Cronofy's modular endpoints handle booking, rescheduling, timezone management and conferencing provisioning, while a separate Meeting Capture capability records and transcribes calls across Teams, Google Meet and Zoom with AI-generated summaries. The platform targets SaaS companies in HR tech, healthcare, CRM and EdTech that need to embed scheduling rather than build calendar infrastructure themselves.

Acuity Scheduling

Acuity Scheduling, now a Squarespace company, is an online appointment booking and business management platform used by service-based businesses to let clients self-book appointments, pay online, and receive automated reminders. It offers a branded booking page, calendar sync, intake forms, and class scheduling for industries such as beauty, wellness, fitness, education, and business services.

Doodle

Doodle is a scheduling tool that removes the back-and-forth of finding a meeting time by letting organizers create group polls, sign-up sheets, and 1:1 booking pages that invitees fill in with their availability. It connects to existing calendars so proposed times automatically avoid conflicts, and supports Zoom, Teams, and Webex integration for turning a scheduled slot straight into a video call. Paid tiers add unlimited polls and booking pages, custom branding, Stripe payment collection on bookings, and team-level features like an admin console, activity reports, and workload-aware smart scheduling that protects focus time. The Enterprise tier adds SSO, MFA, and a dedicated success manager for larger organizations, and Doodle holds 4.8/5 ratings on both G2 and Capterra.

Calendly

Calendly is a scheduling tool that helps manage meetings and appointments. It allows users to share their availability with others, eliminating the need for back-and-forth emails or phone calls to schedule a meeting.

Vimcal

Vimcal is a calendar app designed for speed, aimed at busy professionals who manage a high volume of meetings. It unifies Google Calendar and Outlook accounts into one view, offers cross-timezone availability visualization, and includes a dedicated "Vimcal EA" variant built for executive assistants scheduling on behalf of others.