AI Stem Splitter API vs Pymss
AI Stem Splitter API
aistemsplitter.org
Pymss
pymss.netSide by side
| Figure | AI Stem Splitter API | Pymss |
|---|---|---|
| Price from | $9/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 9 | 1 |
| Spec score · AI stem splitters | 9.3 (#1) | 8.7 (#5) |
| Support | The site links to Discord and email for contact, and the API documentation links to contact support. | The project points users to GitHub documentation and an issue tracker, and its Studio README lists a QQ group for Chinese beta testing, bug reports, and community discussion. |
| What it does | AI Stem Splitter is a browser service that separates uploaded music into downloadable stems. | PyMSS is an open-source music source-separation toolchain for isolating vocals, instruments and other stems. |
Plans
AI Stem Splitter API
- Free trialFree
- Free trial — 3 minsFree
- 50 mins$6.99, paid once
- 50 minutes$6.99, paid once
- Pro$9 a month
- 150 mins$15, paid once
- 150 minutes$15, paid once
- 500 mins$39.99, paid once
- 500 minutes$39.99, paid once
In their own words
AI Stem Splitter API
AI Stem Splitter API has no write-up on Specifiction yet; its figures are above.
Pymss
Pymss is an open-source music source-separation toolchain that runs on the user's own machine and separates audio into vocals, drums, bass, and other stems. Its Studio desktop workspace handles model management, batch jobs, and stem editing. Users can import files or folders, choose a downloaded model, configure inference, and queue work. Studio can browse, download, resume, and delete model files, with storage cleanup controls. Waveform previews, mix controls, saved projects, and stem export support work on the results. Pymss can chain models so each workflow step uses the preceding step's output. The inference package lists WAV, FLAC, MP3, M4A, AAC, Opus, Vorbis, and Ogg output. Other components include ComfyUI custom nodes, a VST3 ARA plugin for compatible DAWs, and a browser interface bundled with the server. The ARA plugin provides per-stem mute and solo controls; its README gives Reaper and Studio One as host examples. The repositories have separate licenses: Studio is listed under AGPL-3.0 and the inference package under MIT. Studio remains at an early development stage, and changes between versions may break things.