Constella is a graph-based second-brain app that ditches folders and lists in favor of an infinite visual canvas. As you write notes, drop in files, or capture screenshots, it auto-suggests connections to existing notes — so related ideas naturally cluster together. AI-assisted search then pulls the right thread back up when you need it, instead of forcing you to remember where you saved something.

It's a local-first app aimed at researchers, writers, and visual thinkers who want their notes to show their relationships, not hide them behind tags. The product is available across macOS, Windows, iOS and Android, with sync across devices. Pricing has a free tier with core features and a paid Pro tier for heavier use.