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Comparison · Infra & APIs
Quay vs Windmill
A side-by-side editorial comparison of Quay and Windmill — release velocity, themes, recent moves, and the top alternatives to consider.
Quay vs Windmill: at a glance
What is Quay?
Quay ships a series of SSRF fixes in mirroring and proxy cache alongside steady CVE patching across 3.10 and 3.12 branches.
Quay is in maintenance mode, releasing security patches across two active branches. Recent releases closed SSRF vulnerabilities in repository source mirroring and proxy cache upstream configuration, and patched a robot account token exposure to global readonly superusers. The cadence is CVE-reactive with no feature development visible in this window.
What is Windmill?
Windmill is building a full AI-native workflow platform — guest app access, agent evals, dbt runtime, and AI cost tracking shipped in rapid succession.
Windmill is an open-source workflow automation and developer platform that has been adding AI capabilities at an accelerating rate. The last month brought AI agent evaluations (with dataset-based scoring and run comparison), AI usage and cost tracking per user and model, a Plan mode for AI sessions (read-only investigation posture), version history for both AI artifacts and resource values, and nested filter groups for Kafka and WebSocket triggers. The platform now spans workflow orchestration, AI-assisted script writing, and a native dbt runtime.
Quay vs Windmill: editorial side-by-side
Quay
5.0INFRA · APIS
Quay ships a series of SSRF fixes in mirroring and proxy cache alongside steady CVE patching across 3.10 and 3.12 branches.
◆ Current state
Quay is in maintenance mode, releasing security patches across two active branches. Recent releases closed SSRF vulnerabilities in repository source mirroring and proxy cache upstream configuration, and patched a robot account token exposure to global readonly superusers. The cadence is CVE-reactive with no feature development visible in this window.
◆ Where it's heading
No feature work appears in this release window. Quay maintains dual active branches (3.10 and 3.12), reflecting a long support commitment typical of Red Hat products. The SSRF fixes represent real security hardening but no new capability surface. Direction from these entries alone is unclear — the product appears to be in a holding pattern between major versions.
◆ Prediction
The pattern suggests continued CVE-reactive patching. A v3.13 or newer major branch would be the next meaningful event, though nothing in these entries signals when that lands.
Windmill
7.5INFRA · APIS
Windmill is building a full AI-native workflow platform — guest app access, agent evals, dbt runtime, and AI cost tracking shipped in rapid succession.
◆ Current state
Windmill is an open-source workflow automation and developer platform that has been adding AI capabilities at an accelerating rate. The last month brought AI agent evaluations (with dataset-based scoring and run comparison), AI usage and cost tracking per user and model, a Plan mode for AI sessions (read-only investigation posture), version history for both AI artifacts and resource values, and nested filter groups for Kafka and WebSocket triggers. The platform now spans workflow orchestration, AI-assisted script writing, and a native dbt runtime.
◆ Where it's heading
The pattern across recent releases is clear: Windmill is building the operational infrastructure around AI agents — not just the ability to run them, but the ability to measure, control, audit, and govern them. Agent evals add a testing layer; Plan mode adds a safety posture; cost tracking adds financial visibility; version history adds rollback capability. The guest app access model also introduces a new monetization dimension (4:1 guest-to-seat ratio above 100 free guests). Windmill is positioning as the AI workflow platform for teams that need enterprise-grade controls.
◆ Prediction
The eval framework (currently beta) will likely gain deeper integration with CI/CD and deployment flows. Guest access metering signals that Windmill is building toward consumption-based pricing for external-facing AI apps. Expect tighter integration between the agent evals system and the existing flow editor deployment pipeline.
Alternatives to Quay and Windmill
Other Infra & APIs 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 Quay or Windmill.
Honeybadger
Honeybadger pivots from error tracker to full observability layer with AI-native query and anomaly detection
Resend
Resend expands from email API to full platform with SSO, analytics, and AI-native dev tooling
Authelia
Authelia patches two access control bypass paths from canonicalization gaps.
Helm
Helm 3 ships its final minor release while Helm 4.3 eliminates multi-minute status computation delays.
Redocly
Redocly releases daily Reunite builds, hardening AI search RBAC and expanding MCP tool support.
See all Quay alternatives → · See all Windmill alternatives →
Recent activity from Quay and Windmill
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoQuay7 CVE patches + robot account token hidden from readonly superusers
- 6d agoWindmillGuest access for apps ⚡
- 18d agoWindmillAI agent evals (beta) ⚡
- 18d agoWindmillAI usage and cost tracking
- 21d agoWindmillApplication default credentials for GCP Pub/Sub triggers
- 28d agoWindmillPlan mode for AI sessions
- 1mo agoQuaySSRF fix in repository mirroring + CVE patches (3.12 branch)
- 1mo agoQuaySSRF fix in repository mirroring backported to 3.10 branch
- 1mo agoWindmillNested filter groups and dotted paths in trigger filters
- 1mo agoQuaySSRF fix in proxy cache + Go 1.25 upgrade (3.12 branch)
- 1mo agoQuaySSRF fix in proxy cache backported to 3.10 branch
- 2mo agoQuayCVE patches: PyJWT, urllib3, shell-quote, kafka-python
Frequently asked questions
What is the difference between Quay and Windmill?
They serve adjacent needs but don't currently overlap on shipped themes. Windmill is currently shipping more aggressively (velocity 7.5 vs 5.0), with 2 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 Quay better than Windmill?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Windmill is currently shipping more aggressively (velocity 7.5 vs 5.0), with 2 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.
What are the best alternatives to Quay?
Top Quay alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Quay alternatives" section above for the current picks, or visit /alternatives/quay for the full list with editorial commentary on each.
What are the best alternatives to Windmill?
Top Windmill alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Windmill alternatives" section above for the current picks, or visit /alternatives/windmill for the full list with editorial commentary on each.