Capture without friction
Today is always open — the same screen, every time you launch. Write down what's on your mind, then decide what it becomes later.
Link your thinking
Connect any two notes with one tap, and Filament remembers the relationship from both sides — link A to B, and B already shows the backlink to A.
Rediscover what you already wrote
Suggested Connections quietly checks new notes against your existing collection, so ideas you'd forgotten resurface exactly when they're relevant.
Extract the good part
Select a single sentence inside a longer entry and pull it into its own note — no copy-paste, no starting over.
Build real structure
Fleeting captures, permanent notes, reference notes with sources, and hub notes that tie related ideas together — a lightweight take on the Zettelkasten method, without the jargon.
Works where you work
Capture on iPhone, think on Mac. Filament Sync keeps your notes and links in sync across both, with AI-suggested connections and AI-assisted drafting.
Pricing
Capture, triage, and manual linking are always free. Filament Sync adds cross-device sync, AI-suggested connections, and AI drafting.