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Comparison · Analytics
OpenCTI vs silx
A side-by-side editorial comparison of OpenCTI and silx — release velocity, themes, recent moves, and the top alternatives to consider.
OpenCTI vs silx: at a glance
What is OpenCTI?
OpenCTI is rebuilding its connector layer into a marketplace and wiring the platform to XTM Hub
OpenCTI ships on a roughly weekly date-stamped cadence, and the last six releases divide cleanly: the connector catalog was redesigned into a faceted marketplace, then the surrounding integrations experience was reworked around it, then the platform gained two-way connection with Filigran's XTM Hub. Alongside that, saved searches and saved filters became shareable and reusable across dashboards. The most recent releases are weighted toward fixes rather than new surface.
What is silx?
silx 3.0 moved its default Qt binding to PySide6 — a migration for everyone embedding it.
silx releases a couple of times a year and reached 3.0.0 in April 2026, which raised the Python floor to 3.10 and switched the default Qt binding to PySide6. The same release reworked the viewer's data views: 3D scatter support, dedicated RGB(A) image views, the composite ImageView split into Plot2dView and ComplexImageView, and NXdata stacks displayed as images. 3.1.0 has since added asinh axis scaling, the twilight colormaps, and dark-theme icons.
OpenCTI vs silx: editorial side-by-side
OpenCTI
6.3ANALYTICS
OpenCTI is rebuilding its connector layer into a marketplace and wiring the platform to XTM Hub
◆ Current state
OpenCTI ships on a roughly weekly date-stamped cadence, and the last six releases divide cleanly: the connector catalog was redesigned into a faceted marketplace, then the surrounding integrations experience was reworked around it, then the platform gained two-way connection with Filigran's XTM Hub. Alongside that, saved searches and saved filters became shareable and reusable across dashboards. The most recent releases are weighted toward fixes rather than new surface.
◆ Where it's heading
The centre of gravity is moving from OpenCTI as a self-contained platform to OpenCTI as a client of Filigran's wider ecosystem — connectors sourced from a catalog with support tiers, custom views deployed from XTM Hub, an MCP server exposed through XTM One. The workflow engine is maturing in parallel, picking up draft approval, transition restrictions and full reset. Telemetry coverage expanded significantly in the same period, which is what makes the catalog's adoption measurable.
◆ Prediction
Expect more of the platform's configuration surface — dashboards, playbooks, mappers — to become distributable through XTM Hub the way custom views and connectors already are. The workflow approval features suggest governance controls are the next area to fill in.
silx
2.5ANALYTICS
silx 3.0 moved its default Qt binding to PySide6 — a migration for everyone embedding it.
◆ Current state
silx releases a couple of times a year and reached 3.0.0 in April 2026, which raised the Python floor to 3.10 and switched the default Qt binding to PySide6. The same release reworked the viewer's data views: 3D scatter support, dedicated RGB(A) image views, the composite ImageView split into Plot2dView and ComplexImageView, and NXdata stacks displayed as images. 3.1.0 has since added asinh axis scaling, the twilight colormaps, and dark-theme icons.
◆ Where it's heading
The project is doing a generational refresh of its GUI layer: modern Qt binding, modules broken out of the composite widgets that had accumulated responsibilities, and the theming work that a desktop application needs to look current. Underneath, the recurring fixes are about HDF5 behavior in real facility environments — file locking, NFS refresh, Windows display paths — which is where a synchrotron toolkit actually gets stressed. Feature growth is concentrated in silx view rather than the library API.
◆ Prediction
Expect the 3.1.x line to keep filling in plotting options and theming, with the PySide6 default flushing out binding-specific bugs from downstream applications over the next few releases.
Alternatives to OpenCTI and silx
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 OpenCTI or silx.
OpenHouse
OpenHouse is hardening the seams where table policies and jobs quietly fail.
statsmodels
statsmodels ships only what the ecosystem breaks — six releases, no new statistics.
StatsBase.jl
StatsBase.jl is in caretaker mode — correctness fixes in, dependency bumps out.
iris
Iris ships steadily on a two-a-year cadence, but its feed publishes only pointers.
shiny
Shiny made reactive apps observable, then gave them a way to tear themselves down
See all OpenCTI alternatives → · See all silx alternatives →
Recent activity from OpenCTI and silx
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 22h agoOpenCTIMass operations can now edit relation start and stop times
- 2d agosilx3.1.0: asinh axis scaling, twilight colormaps, dark-theme icons
- 5d agoOpenCTISaved searches and dashboard filters become shareable and reusable
- 8d agoOpenCTIData sanity operations can be stopped mid-run
- 13d agoOpenCTIIntegrations experience reworked around the new catalog, plus draft approval workflows
- 21d agoOpenCTIConnector catalog is rebuilt as a faceted marketplace ⚡
- 26d agoOpenCTIFix-only release across live streams, groups and dashboard widgets
- 3mo agosilx3.0.1: 2026/05/07
- 3mo agosilx3.0.0: PySide6 becomes the default Qt binding, Python 3.10 required ⚡
- 3mo agosilx3.0.0rc1: release candidate for the PySide6 migration
- 1y agosilx2.2.2: 2025/04/07
- 1y agosilx2.2.0b0: HSDS URL support and a multi-curve comparison window
Frequently asked questions
What is the difference between OpenCTI and silx?
They serve adjacent needs but don't currently overlap on shipped themes. OpenCTI is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 OpenCTI better than silx?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. OpenCTI is currently shipping more aggressively (velocity 6.3 vs 2.5), with 1 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 OpenCTI?
Top OpenCTI alternatives in Analytics are ranked by recent ship velocity. Browse the "OpenCTI alternatives" section above for the current picks, or visit /alternatives/opencti for the full list with editorial commentary on each.
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.