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Head-to-head · Stem Separation Software

Pymss vs StemDeck

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Pymss #6 in Stem Separation Software 8.9/10 Free plan Free plan✓ 3 of 3 features Visit Pymss
StemDeck #10 in Stem Separation Software 8.5/10 Free plan Free plan✓ 3 of 3 features Visit StemDeck

Pymss leads on 0 checks, StemDeck on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePymss · 8.9/10
  • Free planboth

Pymss scores higher on our rubric for stem separation software: 8.9 against 8.5 out of 10; our editors rank them #6 and #10.

Pymss is the better fit for open-source users wanting a full separation workspace. StemDeck is the better fit for musicians who want open-source local separation.

  • Pymss fits best

    Open-source users wanting a full separation workspace

  • StemDeck fits best

    Musicians who want open-source local separation

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Pymss 8.9/10 Visit ↗ StemDeck 8.5/10 Visit ↗
At a glance
Editor score 8.9 8.5
Ranking #6 in Stem Separation Software #10 in Stem Separation Software
Best for Open-source users wanting a full separation workspace Musicians who want open-source local separation
Pricing model Free Free
Starting price Free plan Free
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Desktop, Mobile Cloud, Desktop, Self-hosted
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Windows, macOS, Linux
Integrations 2 integrations 4 integrations
Features Pymss 3/3 · StemDeck 3/3
Batch processing ✓ ✓
Desktop app ✓ ✓
API access ✓ ✓
Specs
Stem types vocals, drums, bass, other vocals, drums, bass, guitar, piano, other
Max upload size Not checked yet 400 MB
Max track length Not checked yet 60 min
Export formats WAV, FLAC, MP3, M4A, AAC, Opus, Vorbis, OGG WAV, MP3
Our review
Pros
  • Manage models, preview and edit stems, and export from a desktop workspace.
  • Batch-process files or folders and chain models with workflow pipelines.
  • Use web, command-line, API, DAW-plugin, ComfyUI, and mobile-related components.
  • Separates vocals, drums, bass, guitar, piano, and other
  • Includes waveform editing, looping, and per-stem mixer controls
  • Runs on Windows, macOS, Linux, web, and self-hosted setups
Cons
  • Documented core stem types are vocals, drums, bass, and other.
  • Its components span multiple open-source repositories rather than one hosted service.
  • Local workflows may not suit buyers seeking a hosted subscription service.
  • Local processing is not suited to cloud-first workflows
  • Separation is limited to the six listed stem types
  • Its verified integrations focus on YouTube, SoundCloud, Docker, and Unraid
Our verdict

Pymss is an open-source music source separation toolchain for producers, researchers, and others who need to split recordings into stems. It combines desktop, browser, command-line, DAW-plugin, ComfyUI, and mobile-related components, with…

Read the review →

StemDeck is an open-source audio stem-separation application for musicians, producers, and hobbyists who want to split tracks and work with the results in one place. It processes local audio files or supported URLs on the user's own…

Read the review →
  1. PymssStem Separation Software 8.9Free plan
  2. StemDeckStem Separation Software 8.5Free plan

Strengths and trade-offs

  • Pymss — where it wins

    • Manage models, preview and edit stems, and export from a desktop workspace.
    • Batch-process files or folders and chain models with workflow pipelines.
    • Use web, command-line, API, DAW-plugin, ComfyUI, and mobile-related components.

    Where it doesn't

    • Documented core stem types are vocals, drums, bass, and other.
    • Its components span multiple open-source repositories rather than one hosted service.
    • Local workflows may not suit buyers seeking a hosted subscription service.

  • StemDeck — where it wins

    • Separates vocals, drums, bass, guitar, piano, and other
    • Includes waveform editing, looping, and per-stem mixer controls
    • Runs on Windows, macOS, Linux, web, and self-hosted setups

    Where it doesn't

    • Local processing is not suited to cloud-first workflows
    • Separation is limited to the six listed stem types
    • Its verified integrations focus on YouTube, SoundCloud, Docker, and Unraid

More comparisons

All stem separation software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update