No. 10 of 27 ·AI Calendar Assistants

Atomic

Name: Atomic
Price: 15 USD

Self-hosted · paid plans from $15/mo

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Freedom report

One barScore 5.3

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely0 of 6 device platforms
DocumentedPlans, terms and facts published

Atomic is ranked #10 of 27 in AI calendar assistants on Freedom251. It runs on Self-hosted. Paid plans start at $15/mo.

Atomic plans and pricing

All plans

Customized Atomic for your team on your cloud $15/mo $15 / month support afterwards; 1 year support included Same features as cloud hosted version github.com · 4 Oct 2026

Compared on AI calendar assistants

Automatic scheduling: Yes
Task management: Yes
Multiple calendars: Yes
Planning input: natural language

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The record

Purpose: Atomic describes itself as an open-source, priority-driven AI scheduler for solving time and scheduling problems.
Calendar assistant: The project says users can chat with their calendar using ChatGPT to teach, find, block, create, schedule, and update events.
Semantic search: Semantic search matches phrases to trained past events and can reuse attributes such as duration, color, time preferences, priority, and tags.
Automated tagging: An AI classification model can apply tags, each with its own settings for matching events.
Flexible meetings: Atomic supports recurring one-to-one and ad hoc team meetings that account for attendees’ calendars and time preferences, including non-Atomic users.
Autopilot: The AI planner can run automatically before the workday and apply features learned from trained event templates.
Time blocking: Users can set priority-based calendar blocks for tasks with daily or weekly deadlines and choose soft or hard deadlines.
Training requirement: Semantic event templates require training Atomic on existing events first.
Self-hosting: Atomic offers a self-hosted Docker Compose setup and describes self-hosting as privacy-enabled by default and customizable.
Calendar integration: The README’s meeting-assist diagram shows Google Calendar receiving an optimally selected meeting slot and event.
Planned integrations: The README lists Microsoft Outlook Calendar integration, SSO for teams, and ChatGPT integration for a Premium version in its roadmap.
Cloud support: The cloud-hosted version is described as prioritized and including full customer support and bug fixes.
Maker: The repository’s support section says the maker is spending 100% of their work time on the project and is setting up GitHub Sponsors.
Price from: $15/mo

Where it ranks on Freedom251

Best AI Calendar Assistants in 2026#10 of 27
Best AI Computer Use Agents in 2026#14 of 24

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Sources

github.com/sam-morin/atomic-ai-calendar· checked 4 Oct 2026