Top 20 Alternatives to Microsoft Outlook Calendar in Calendar, Notebook & Scheduling Software

Free, cloud‑based calendar with seamless integration across Google Workspace, intelligent event suggestions, and robust sharing controls.

Native macOS/iOS calendar that syncs via iCloud, supports natural language entry, and integrates with Siri and Apple Maps.

Premium calendar app for macOS/iOS offering beautiful UI, natural language parsing, weather forecasts, and task integration with Reminders and Todoist.

Part of Zoho Suite, this web calendar provides group calendars, resource booking, and integration with Zoho Mail and CRM.

Built‑in Teams calendar focused on meeting scheduling, channel integration, and collaboration within the Microsoft 365 ecosystem.

All‑in‑one workspace with flexible calendar views, kanban boards, and rich note‑taking, allowing teams to create custom scheduling workflows.

Kanban‑style project board that includes calendar power‑ups, due‑date tracking, and integration with Google Calendar and Outlook.

Project management platform with timeline, calendar view, and workload balancing; integrates with Outlook, Google Calendar, and Slack.

Unified work OS offering multiple view types (list, board, calendar, Gantt) and native time‑blocking for personal scheduling.

Task manager with powerful recurring date parsing and a built‑in calendar view; syncs with Google Calendar, Outlook, and Apple Calendar.

Simple to‑do list and calendar hybrid that combines tasks, events, and reminders with voice entry and cross‑device sync.

Scheduling automation tool that lets others book time on your calendar, eliminating back‑and‑forth emails; integrates with major calendars.

Family‑focused calendar and planner with shared lists, meal planning, and a shared journal, syncable across iOS, Android, and web.

Open‑source calendar extension for Mozilla Thunderbird, supporting iCal, task lists, and email integration.

Shared calendar app designed for groups, with built‑in chat, note attachments, and color‑coded calendars.

Formerly a smart calendar with AI routing and analytics; its core features live within Slack’s native calendar now.

A visual planner that overlays a calendar on a drag‑and‑drop board, helping designers schedule project milestones.

Team‑oriented calendar without user accounts – uses shared links and color‑coded sub‑calendars for resource planning.

Productivity suite that includes personal calendar analytics, meeting health scores, and suggestions for focused time.

Browser‑based email and calendar aggregator that lets you manage multiple accounts (Gmail, Outlook, iCloud) from a single interface.