STEM
What it is
STEM is a free web platform for bands and music collaborators to upload, mix, and discuss song stems. A multi-track mixer lets users work with uploaded parts, while invited members can view or collaborate on projects in real time. Timed comment threads can be attached to individual tracks or the master track, focusing discussion on specific moments. Share links have customizable permissions for private or public songs. Users can render stems into MP3 files, save mix snapshots, and export a render. Songs can be organized into playable, shareable lists for albums, EPs, setlists, or work sessions. Supporting files may include lyrics, chord charts, reference tracks, session notes, and other materials. STEM is positioned as a place to discuss music and make group decisions, rather than as a full digital audio workstation for creating music. Certain features require Google-account sign-in. Its privacy policy says uploaded audio is accessible to the user and explicitly shared people, with audio stored in Vercel Blob and user data in MongoDB. Data access, correction, deletion, and export requests are supported.
For and against
For
- Real-time project collaboration
- Timed comments on tracks
- Customizable private or public sharing
- MP3 rendering and mix snapshots
- Supports lists and supporting files
Against
- Runs on the web only
- Some features require Google sign-in
- Version history is limited
The verdict
STEM centers collaborative review of recorded material, combining mixing, comments, sharing, and project organization. Its free plan supports these workflows, while limited version history and web access shape its fit.
Who it suits
It suits bands and collaborators who need shared stem review, timed discussion, and permission-controlled links. It is less suited to people seeking a full DAW for music creation.
Plans and prices
Free plan
Read 9 Oct 2026 · stem.audio
On the record
- Account access
- Users must sign in with a Google account to use certain features.stem.audio · read 9 Oct 2026
- Attachments
- Songs can include lyrics, chord charts, reference tracks, session notes, and other supporting files.stem.audio · read 9 Oct 2026
- Collaboration
- Users can invite band members to view or collaborate on projects in real time.stem.audio · read 9 Oct 2026
- Comments
- Users can create timed comment threads on individual tracks or the master track.stem.audio · read 9 Oct 2026
- Data rights
- Users may request access, correction, deletion, or export of their data; data is retained while the account is active.stem.audio · read 9 Oct 2026
- Data storage
- The privacy policy says audio files are stored in Vercel Blob and user data in MongoDB.stem.audio · read 9 Oct 2026
- Exports
- Users can render stems into an MP3, save mix snapshots, and export the render.stem.audio · read 9 Oct 2026
- Intended use
- The maker describes STEM as a tool for discussing music and making decisions together, rather than creating music like in a full DAW.stem.audio · read 9 Oct 2026
- Lists
- Users can group songs into playable, shareable lists such as albums, EPs, setlists, or work sessions.stem.audio · read 9 Oct 2026
- Maker
- The terms identify Antonio Brandao as the copyright holder and list [email protected] for questions.stem.audio · read 9 Oct 2026
- Mixer
- Users can upload and mix song stems using a multi-track mixer console.stem.audio · read 9 Oct 2026
- Privacy
- The privacy policy says personal data is not sold or shared with third parties, and uploaded audio is accessible to the user and people they explicitly share it with.stem.audio · read 9 Oct 2026
- Purpose
- STEM is a platform for bands and music collaborators to upload, mix, and discuss music stems.stem.audio · read 9 Oct 2026
- Sharing
- Users can create share links with customizable permissions, keeping songs private or sharing them publicly.stem.audio · read 9 Oct 2026
