Heptabase

Free tier

Master 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

Facts verified against heptabase.com on Oct 5, 2026

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Heptabase is a freemium knowledge management platform built around a visual, whiteboard-first architecture. It features a block-based editor with bi-directional linking, multi-model AI agent support (GPT, Claude, and Gemini), and a CLI agent interface compatible with Claude Code and Codex. The platform exposes an API and integrates with external tools including Readwise, Zotero, PDF annotation pipelines, YouTube transcript ingestion, and a Web Clipper. AI credits are consumed per model interaction; credit allocations vary by tier (100/mo on Pro, 1,800/mo on Premium, 8,100/mo on Premium+). GitHub activity sits at 154 stars.

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