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Open-source Notion alternative.
Local-first Notion alternative with a Claude Code brain
An open-source, local-first Notion alternative. Plain-Markdown notes that sync peer-to-peer, end-to-end encrypted with a Company Brain that answers across your workspace using the Claude Code you already run, or a fully-local model. No account, no cloud.
I built Paperus because I wanted Notion's editor and databases without handing my team's entire brain to someone else's cloud. So I made the opposite trade: every note is a plain Markdown file in a folder you own, on your own machine.
There's no account and no sign-up. You create a team, share one link, and edits sync directly between devices over WebRTC, end-to-end encrypted with libsodium. The only thing I host is a tiny stateless relay that helps peers find each other; it sees hashed topics and ciphertext, stores nothing, and you can self-host it with Docker in about a minute.
The part I'm most excited about is the Company Brain. It reads across your whole workspace and answers in plain language, citing the exact notes it used. Retrieval is 100% local, your notes are never bulk-uploaded to be searched. And the answer model is yours: point it at the Claude Code you already run, a fully-offline local model (Ollama), or your own API key. A genuinely smart workspace assistant — no new subscription, and nothing leaves your machine to be indexed.
It's AGPL-3.0 and fully open source, both the app and the relay are on GitHub. macOS ships today (universal, Apple Silicon + Intel, signed & notarized), there's a native iOS/Android companion, and Windows/Linux are on the roadmap.
Honest trade-offs, all documented: it's built for small teams (the P2P mesh has limits), there's no remote revocation yet (removing someone = rotating the team link), and anyone with a team link can read that team's roster. I'd rather you hear that from me than find it later.
I'd love your feedback, especially on the Brain + Claude Code integration. What would it take for you to trust your own team's docs to something like this?
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About Open-source Notion alternative. on Product Hunt
“Local-first Notion alternative with a Claude Code brain”
Open-source Notion alternative. was submitted on Product Hunt and earned 6 upvotes and 1 comments, placing #33 on the daily leaderboard. An open-source, local-first Notion alternative. Plain-Markdown notes that sync peer-to-peer, end-to-end encrypted with a Company Brain that answers across your workspace using the Claude Code you already run, or a fully-local model. No account, no cloud.
Open-source Notion alternative. was featured in Open Source (68.5k followers), Privacy (11.1k followers), GitHub (41.3k followers) and Notion (2.2k followers) on Product Hunt. Together, these topics include over 46.6k products, making this a competitive space to launch in.
Who hunted Open-source Notion alternative.?
Open-source Notion alternative. was hunted by Mo Ashique Kuthini. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Mo Ashique Kuthini
Hey Product Hunt 👋 maker here.
I built Paperus because I wanted Notion's editor and databases without handing my team's entire brain to someone else's cloud. So I made the opposite trade: every note is a plain Markdown file in a folder you own, on your own machine.
There's no account and no sign-up. You create a team, share one link, and edits sync directly between devices over WebRTC, end-to-end encrypted with libsodium. The only thing I host is a tiny stateless relay that helps peers find each other; it sees hashed topics and ciphertext, stores nothing, and you can self-host it with Docker in about a minute.
The part I'm most excited about is the Company Brain. It reads across your whole workspace and answers in plain language, citing the exact notes it used. Retrieval is 100% local, your notes are never bulk-uploaded to be searched. And the answer model is yours: point it at the Claude Code you already run, a fully-offline local model (Ollama), or your own API key. A genuinely smart workspace assistant — no new subscription, and nothing leaves your machine to be indexed.
It's AGPL-3.0 and fully open source, both the app and the relay are on GitHub. macOS ships today (universal, Apple Silicon + Intel, signed & notarized), there's a native iOS/Android companion, and Windows/Linux are on the roadmap.
Honest trade-offs, all documented: it's built for small teams (the P2P mesh has limits), there's no remote revocation yet (removing someone = rotating the team link), and anyone with a team link can read that team's roster. I'd rather you hear that from me than find it later.
I'd love your feedback, especially on the Brain + Claude Code integration. What would it take for you to trust your own team's docs to something like this?
⬇️ macOS download + source:
https://github.com/Naridon-Inc/N... · site: https://oss.naridon.com