Heptabase
Free tierMaster anything you learn. Do your best research with AI.
Free tier available·All audiences·Powered by Google (Gemini), OpenAI (GPT), Anthropic (Claude)·API available
Key strengths
Visual whiteboard-based knowledge organizationAI Tutor with structured personalized learning sessionsBi-directional links and block-based editorMulti-model AI agent support (GPT, Claude, Gemini)PDF annotation and YouTube transcript integrationCLI agent compatible with Claude Code and Codex
Free tier + paid plans · from $8.99 USD/mo
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- API: A public API is available for programmatic access to notes and workspace data.
- AI Agents: Multi-model support across OpenAI (GPT), Anthropic (Claude), and Google (Gemini). The Gemini agent is available on the Pro tier; GPT and Claude agents unlock at Premium.
- CLI Compatibility: The agent layer is compatible with Claude Code and Codex for terminal-driven workflows.
- Editor Architecture: Block-based editor with bi-directional linking across notes and whiteboards.
- Integrations: Readwise, Zotero, PDF annotation, YouTube transcript ingestion, Web Clipper.
- AI Credits: Consumed per AI interaction. Allocations: 100/mo (Pro), 1,800/mo (Premium), 8,100/mo (Premium+). Premium+ users receive a 33% AI credit discount.
- Pricing: Three yearly-or-monthly tiers — Pro ($8.99/mo), Premium ($17.99/mo), Premium+ ($53.99/mo). Yearly billing saves 25%. 7-day free trial available.