Top 10 Best Online Calendar Software of 2026

Google Calendar is a leading free online calendar service that enables users to create, edit, share, and manage events, appointments, and schedules across web, mobile, and desktop. It offers seamless integration with Gmail for automatic event detection, Google Meet for video calls, and other Google Workspace tools for enhanced productivity. With features like color-coded calendars, recurring events, reminders, and real-time collaboration, it's designed for individuals and teams handling complex scheduling needs.

Microsoft Outlook Calendar, accessible via outlook.office.com, is a robust web-based calendaring tool that enables users to schedule events, manage appointments, and coordinate meetings with ease. It excels in integration with the broader Microsoft 365 ecosystem, including Outlook email, Teams, and OneDrive, facilitating seamless collaboration for teams. Advanced features like recurring events, time suggestions, focus time blocking, and AI-powered Copilot assistance make it a powerhouse for professional scheduling.

Calendly is a leading online scheduling platform that enables users to create customizable booking links for meetings and appointments, automatically checking availability across integrated calendars to prevent double-bookings. It supports individual, team, and enterprise scheduling with features like routing forms, workflows, and one-on-one or group events. The tool integrates seamlessly with popular calendars (Google, Outlook), video tools (Zoom, Teams), and CRMs, streamlining coordination without endless email threads.

Fantastical is a premium calendar app available on Mac, iOS, Windows, and web, renowned for its natural language processing that allows users to create events by typing phrases like 'Dinner with Sarah next Friday at 7pm.' It integrates deeply with services like iCloud, Google Calendar, Exchange, and more, offering features such as calendar sets, weather forecasts, task management, and shareable scheduling links called Openings. The app emphasizes a clean, intuitive interface with smooth animations and powerful customization options for efficient time management.

Apple Calendar on iCloud.com is a web-based calendar app that enables users to create, edit, and manage events, appointments, and schedules with seamless synchronization across Apple devices. It supports calendar sharing, invitations, reminders, and location integration, making it a reliable tool for personal and family scheduling. The interface emphasizes simplicity and integrates with other Apple services like Contacts and Mail for enhanced usability.

Acuity Scheduling is a comprehensive online appointment scheduling platform designed for service-based businesses to automate bookings, manage calendars, and handle client interactions. It offers customizable booking pages, intake forms, automated reminders, and support for individual, group, or class sessions with integrated payments and video conferencing. Acquired by Squarespace, it excels in creating branded experiences while syncing seamlessly with tools like Google Calendar, Zoom, and Stripe.

Doodle is a specialized online scheduling tool designed to simplify group coordination by letting users create polls for meetings, events, or appointments where participants vote on their availability. It integrates with major calendars like Google Calendar, Outlook, and Apple Calendar to pull real-time availability and suggest optimal times, eliminating endless email threads. While not a full-featured calendar app, it excels at one-off or recurring group scheduling with features like booking pages and automated reminders.

Zoho Calendar is a web-based scheduling tool that enables users to create, manage, and share events with features like multiple calendar views, recurring appointments, reminders, and task integration. It excels in team collaboration through shared calendars, permission controls, and seamless syncing with other Zoho apps such as Mail, CRM, and Bookings. Designed for personal and business use, it offers mobile apps and public booking pages for effortless appointment scheduling.

Teamup is a flexible online calendar platform that enables easy sharing of schedules via secure links, without requiring users to create accounts. It supports multiple sub-calendars for organizing events by category, group, or purpose, with customizable views and permissions. Ideal for teams, clubs, or any group needing collaborative scheduling, it integrates with iCal and offers mobile access.

Proton Calendar is a privacy-centric online calendar app from Proton that emphasizes end-to-end encryption for events, schedules, and shared calendars to protect user data from unauthorized access. It offers standard features like recurring events, reminders, time zone support, and secure sharing across web, iOS, and Android platforms. Seamlessly integrated with Proton Mail and other Proton services, it provides a clean, ad-free experience focused on security rather than extensive ecosystem integrations.