Alternatives to Heptabase

AI-native knowledge base software that connects your docs to ChatGPT, Claude, and Copilot through an MCP Server.

Ask questions across all your PDF files and get answers with cited sources.

Open-source, local-first AI workbench for the full scientific research lifecycle, with bundled scientific database tools and your choice of model provider.

Email-based AI reading companion that summarizes articles, YouTube videos, and PDFs — no signup required.

IKI AI is an LLM-powered knowledge workspace that captures your reads, summarizes them, and writes grounded in your own library.

AI search engine that answers with cited sources across ChatGPT, Gemini, and Claude.

Saner is an AI personal assistant for ADHD that turns emails, notes, and to-dos into one searchable inbox.

Paxton AI is a legal AI assistant for litigation teams — tied to a matter record, research, and drafting across all 50 states.

Mindsera is an AI journal that detects your emotions, spots recurring thought patterns, and coaches you with 50+ mental models.

Perplexity is a cited AI answer engine that puts a verifiable source link on every answer it gives.

Turn open-access research papers into audio podcasts and ask them questions by chat.

Otio is a persistent AI research workspace that keeps every PDF, article, video and transcript you upload in one searchable library, with page-level citations

Chinese-language search engine that returns cited, synthesized answers instead of link lists.

Open-source, markdown-first note-taking with backlinks, end-to-end encryption, and built-in AI

Kortex is an AI writing workspace and second brain for minimalist writers and note-takers — now rebranding to Eden.

AI mind map generator turns prompts, PDFs, videos, audio, and webpages into editable mind maps.

AI research assistant that searches 200M+ peer-reviewed papers and auto-cites in 2,600+ styles

Free Stanford research prototype that turns a topic into a cited, Wikipedia-style report through simulated expert–learner AI dialogue.

Source-grounded AI research notebook that turns your documents into cited answers and podcast-style Audio Overviews.

Knowing® is a v0.2 preview tree outliner that runs AI actions on individual outline nodes instead of inside a chat thread.

Private video journaling app that turns spoken entries into a searchable, AI-remembered archive.

Vetis turns text, voice, and photo fragments into an AI-organized, searchable life archive on Android.

MyMemo AI is an AI knowledge base that captures links, videos, PDFs and voice recordings, then answers questions from your own saved library with citations.

Ask is Slite's permission-aware AI search layer that returns sourced answers from your knowledge base and connected tools.

Arky is a visual thinking workspace where an infinite canvas, spatial maps, and context-aware AI turn scattered notes into structured

Sharly AI is a document research workspace that summarizes, compares, and cites your files with verifiable sources.

AI research platform that runs multi-step literature searches across 300+ scientific, clinical, regulatory and patent databases and returns citation-backed

Obsidian Copilot is an AI knowledge work agent that chats, searches, and automates your Obsidian vault on any LLM.

Free AI-assisted search, chat, and structured PDF reports over open-access PubMed biomedical literature, no registration needed.

Visual research workspace that maps AI conversations as branching graphs for multi-model comparison.