Checked Jun 6 2026
Obsidian
Obsidian is a local-first personal knowledge base for researchers, developers, and knowledge workers who want full ownership of their notes as plain Markdown files.
Source mix7 reported2 data vendor
Evidence notes
Who uses it: Individual knowledge workers — researchers, writers, developers, students — and over 10,000 organizations that need a private, durable, extensible note environment.[1]+3Reported
Public signals: Obsidian Starter Kit v4 Is Here: Your Vault Is Now a Full AI Assistant | by Sébastien Dubois |.[7]Reported
Product: Core app runs entirely on-device across macOS, Windows, Linux, iOS, and Android. Optional paid services — Sync (end-to-end encrypted cross-device sync, $4–$8/mo) and Publish (static website from notes, $8–$16/mo) — generate ~$25M ARR per third-party estimates.
Source ledger
- [1]How Obsidian Built a $350M App With Just 3 Engineers
- [2]7-Person Team Generates $25 Million Annually: Obsidian Redefines Software Startups with "Zero Funding, No Meetings" Model — BigGo Finance
- [3]另类产品 Obsidian：8 人 1 猫没融资，2500 万美金 ARR 不追 AI
- [4]Obsidian ARR hit $25M and $350M valuation with just 9 persons | Obsidian ARR Milestone | ARR Club
- [5]DeveloPassion’s Newsletter #212 — Obsidian Starter Kit v4 Is Live | by Sébastien Dubois | May, 2026 | Personal Knowledge Management Journal