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Commercial Licensing

This repository is dual-licensed:

  • Open-source: AGPL-3.0-only. If your project is itself AGPL-compatible, this is what you want.

  • Commercial: Imazen offers a paid commercial license for use in closed-source products. Two separate tracks apply, depending on the crate:

    butteraugli-gpu, ssim2-gpu, zensim-gpu, zenmetrics-cli, zenmetrics-corpus

    Standard Imazen commercial license — covers the GPU implementations Imazen authored from scratch for this repository, the test corpus, and the unified CLI. Contact support@imazen.io for terms.

    dssim-gpu (separate track)

    dssim-gpu is a CubeCL port of the algorithm shipped by the upstream dssim / dssim-core crates by Kornel Lesiński. Imazen authored the GPU port itself, but the underlying algorithm and the parity-validation reference are Pornel's. As a result, commercial use of dssim-gpu requires both:

    • An Imazen commercial license for the GPU port code, AND
    • An upstream commercial license from Pornel for the underlying DSSIM algorithm.

    Both can be arranged via support@imazen.io; we coordinate the upstream license alongside ours. This is the same pattern Imazen uses for any port whose root algorithm carries a third-party copyright.

If you're not sure which track applies, ask support@imazen.io.