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Download Nebula

Secure note-taking with post-quantum encryption, knowledge graph, and free device sync. No account required. Version 0.0.0-19

Windows

x64

nebula-x64-setup.exe

SHA-256: 3af237f3c887f661f1205945c8196079236a10d40c212a811f7dee51aed7161e

macOS

Apple Silicon

nebula-aarch64.dmg

SHA-256: 166f2c44688aef38aee5bd4b6a5c46d466c497e2871bf2559442ab8a24ba694e

Ubuntu

x64

nebula-x64.deb

SHA-256: fdefbd628df7b921f96e705ede34b5c30d7a15e86bf992d10763bb868851207f

Ubuntu

ARM64

nebula-aarch64.deb

SHA-256: 7e0b83653871f597eac9baa3597498450e1501eb902d5e3cf955ed41c20346f8

Optional · every platform

Offline AI models

Nebula's on-device AI (transcription, text extraction, equations, narration, and Qwen 3.5 writing help) downloads its models the first time you turn it on. For computers without internet access, get every model in one file instead (about 1.9 GB) and import it in Nebula.

  1. Download the bundle on any connected computer and copy it to the offline one.
  2. In Nebula, open Settings › AI & Models and choose Import offline bundle. Nebula checks every file before using it.
  3. Windows: extract the zip into the same folder as the installer before installing, and the models are added automatically.

Use the bundle from the same release as your installer (Nebula 0.0.0-19).

Quick Start

1.

Download the installer for your platform above

2.

Install and launch Nebula

3.

Start writing — no account or license needed for the Free tier

Want semantic search, forensics tools, or more device slots?

View Pro & Forensics Plans

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