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Comparison · Analytics
silx vs Umami
A side-by-side editorial comparison of silx and Umami — release velocity, themes, recent moves, and the top alternatives to consider.
silx vs Umami: at a glance
What is silx?
silx settles into maintenance a release after its PySide6 migration
silx is in the quiet phase after a generational release. 3.1.1 is a single fix to FitWidget loading a fit function from file. The release before it, 3.1.0, was the first real feature work since the migration - asinh axis scaling, twilight colormaps, and dark-theme icons - and 3.0.1 was similarly small. The 3.0.0 cut that reset the Qt binding and Python floor still defines what the line is doing.
What is Umami?
Umami spent late 2025 patching Next.js CVEs, then shipped Boards and Session Replay in v3.1.0.
The window splits sharply. Four of six releases are December 2025 patches across the v2 and v3 lines, all responding to the same Next.js and React security advisories plus Docker build breakage — several shipped within days of each other because the first fix updated Next.js without the affected React versions. Then v3.1.0 in April 2026 delivered custom dashboards as Boards, Session Replay, Web Vitals performance tracking, a redesigned share page, and a large batch of fixes.
silx vs Umami: editorial side-by-side
silx
5.0ANALYTICS
silx settles into maintenance a release after its PySide6 migration
◆ Current state
silx is in the quiet phase after a generational release. 3.1.1 is a single fix to FitWidget loading a fit function from file. The release before it, 3.1.0, was the first real feature work since the migration - asinh axis scaling, twilight colormaps, and dark-theme icons - and 3.0.1 was similarly small. The 3.0.0 cut that reset the Qt binding and Python floor still defines what the line is doing.
◆ Where it's heading
The cadence has slowed markedly since April, and the content has shifted from structural change to plotting and colormap refinement. That is the expected shape after a binding migration: downstream beamline code needs a stable target, so the project trades feature velocity for a quiet surface. The gap between 3.0.1 in May and 3.1.0 in August is the clearest signal of the deliberate slowdown.
◆ Prediction
Expect further point releases servicing the plotting and fitting widgets rather than another structural change, with feature work continuing to arrive in the 3.1.x minors rather than patches.
Umami
0.0ANALYTICS
Umami spent late 2025 patching Next.js CVEs, then shipped Boards and Session Replay in v3.1.0.
◆ Current state
The window splits sharply. Four of six releases are December 2025 patches across the v2 and v3 lines, all responding to the same Next.js and React security advisories plus Docker build breakage — several shipped within days of each other because the first fix updated Next.js without the affected React versions. Then v3.1.0 in April 2026 delivered custom dashboards as Boards, Session Replay, Web Vitals performance tracking, a redesigned share page, and a large batch of fixes.
◆ Where it's heading
The security cluster is a framework dependency showing its cost — an analytics tool inheriting its release schedule from Next.js advisories. v3.1.0 is where product work resumes, and its content is telling: Session Replay and Web Vitals move Umami past pageview counting into behaviour and performance, which is the territory occupied by heavier commercial analytics rather than the lightweight privacy-first tools it grew up alongside.
◆ Prediction
Expect the next releases to build on Boards and Session Replay rather than return to the counting core, since both are new surfaces that arrived with a single release and no follow-up yet.
Alternatives to silx and Umami
Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either silx or Umami.
Omni
Omni ships weekly, and almost every week the headline item is an AI feature.
Plotly
Plotly is turning its cloud into a metered compute platform with an enterprise on-ramp.
aniread
aniread stops asking you to know which tracker wrote the file
Rho
Rho's release machinery finally produced a stable build — and it shipped no new product.
Usermaven
Usermaven closed the loop: data comes in from anywhere, and now it goes back out.
Recent activity from silx and Umami
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 6h agosilxFitWidget fix for loading a fit function from file
- 9d agosilx3.1.0: asinh axis scaling, twilight colormaps, dark-theme icons
- 3mo agosilx3.0.1: silx view fails to disable HDF5 file locking
- 3mo agosilx3.0.0: PySide6 becomes the default Qt binding, Python 3.10 required ⚡
- 3mo agosilx3.0.0rc1: release candidate for the PySide6 migration
- 4mo agoUmamiv3.1.0: Boards, Session Replay and Web Vitals ⚡
- 8mo agoUmamiv3.0.3: Next.js security patch
- 8mo agoUmamiv2.20.2: Next.js security patch for the v2 line
- 8mo agoUmamiv2.20.1: React version fix and Docker build repairs
- 8mo agoUmamiv2.20.0: Next.js CVE fix for the v2 line
- 8mo agoUmamiv3.0.2: Next.js RSC vulnerability patch and UI fixes
- 1y agosilx2.2.2: plot axes limits, OpenGL axes and libhdf5 1.14 fixes
Frequently asked questions
What is the difference between silx and Umami?
They serve adjacent needs but don't currently overlap on shipped themes. silx is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is silx better than Umami?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. silx is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to silx?
Top silx alternatives in Analytics are ranked by recent ship velocity. Browse the "silx alternatives" section above for the current picks, or visit /alternatives/silx for the full list with editorial commentary on each.
What are the best alternatives to Umami?
Top Umami alternatives in Analytics are ranked by recent ship velocity. Browse the "Umami alternatives" section above for the current picks, or visit /alternatives/umami for the full list with editorial commentary on each.