Dainvo vs Open Sunsama

Dainvo is a local-first planning workspace for calendars, tasks, projects, meetings, notes, and focused work. Its calendar offers day, week, month, year, and list views, plus weather and time zones. Calendar connections include Google, Outlook, Apple, CalDAV, and Dainvo calendars; task connections include Todoist, Microsoft To Do, Google Tasks, TickTick, monday.com, and Obsidian. Users can schedule tasks, group them into Buckets, and plan work sessions for Projects. Projects can contain ordered tasks, a deadline, one level of subprojects, notes, file links, and multiple calendar blocks. Meeting links support Google Meet, Zoom, Webex, and Microsoft Teams. Connected calendar events and tasks sync with their providers, while Project Notes and local file links stay on the user’s computer. The encrypted local SQLite store uses a key protected by operating-system secure storage. Dainvo has a Free plan and Pro plans at $5 a month or $48 a year. Its Android, iPhone, and iPad apps are listed as Early Access.

Open Sunsama is a task manager and daily planner built around a board of days and calendar time blocking. Move tasks from a backlog to a daily board; unfinished work rolls over to tomorrow. Focus mode times a task and tracks actual time against its estimate. It syncs Google Calendar, Outlook, and iCloud, with support for multiple accounts. Time blocks stay in Open Sunsama rather than being copied to Google or Outlook calendars. Its hosted MCP server connects to Claude, ChatGPT, Cursor, and other MCP clients through OAuth and provides 24 tools. The REST API covers tasks, subtasks, and time blocks, with selectable API-key scopes. Users can also self-host the web app, API, MCP server, and PostgreSQL database using Docker Compose. The free plan costs nothing for personal use. The non-commercial license limits production use by companies, and there is no one-click export button. Desktop apps are available for Mac, Windows, and Linux; phones use the mobile web app, as no native phone app is available yet.