The bidirectional-linked notes app that pioneered the digital Zettelkasten.
Roam Research is the app that made bidirectional links and block-level references a household concept among knowledge workers. Every sentence in your notes is a discrete block you can link, reference, and embed anywhere else. The 2026 release added serious AI features — auto-linking, semantic search, and graph-wide Q&A — that turn a Zettelkasten into a queryable second brain.
Who it's for: Researchers, writers, founders, and lifelong learners who think in connections. Especially powerful if you're doing long-form research, writing a book, or building a personal knowledge base.
Type [[ to link any page. Roam builds the backlinks graph automatically — every connection surfaces serendipitously as you write.
Reference individual paragraphs, not just pages. Pull a quote from 2023 into today's daily note and it updates live — the killer feature for daily journaling workflows.
Ask a question across your entire graph. Roam AI pulls from every note, summarizes relevant blocks, and cites them inline. Like having a research assistant who's read everything you've ever saved.
One note per day, opened automatically. Capture fleeting thoughts, link to past notes, watch the graph grow over years — the foundation of every productive Roam workflow.
If you're serious about building a personal knowledge base and want the original bidirectional-linking experience, Roam still holds up. The Roam AI upgrade makes it more than a curiosity — it's now a daily research tool. For local-first privacy, pick Obsidian. For open-source and free, pick Logseq.
Local-first markdown notes. Massive plugin ecosystem with AI plugins.
Open-source outliner with bidirectional links. Local-first.
All-in-one workspace. Pages + databases + AI writing.
AI-first notes app. Auto-tags and surfaces related notes.