Domvault – Self-Hosted Second Brain

A self-hostable note-taking and knowledge management tool that helps users compound their own ideas and discover new connections. Target users are knowledge workers, researchers, and anyone wanting to extract more value from their personal notes without lock-in.

The self-hosted personal knowledge management space has genuine momentum right now, driven by growing distrust of cloud lock-in and the collapse of user confidence in platforms like Notion after pricing changes and acquisition rumors around tools like Evernote. Obsidian is the obvious incumbent here and it's a formidable one — it's free, local-first, has a massive plugin ecosystem, and a fiercely loyal community that actively resists paying for alternatives. The $1k–5k/mo revenue band is plausible but narrow: self-hosters are notoriously price-resistant, so monetization likely depends on a hosted option, enterprise sync features, or a one-time license model rather than SaaS subscriptions, which creates structural tension with the revenue target. The biggest risk is that Obsidian's plugin community already ships most conceivable features faster than a solo founder can, making differentiation a moving target that's nearly impossible to sustain.