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Comparison · Infra & APIs
Windmill vs Expo
A side-by-side editorial comparison of Windmill and Expo — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:observability
Windmill vs Expo: at a glance
| Feature | Windmill | Expo |
|---|---|---|
| Sector | Infra & APIs | Infra & APIs |
| Velocity score | 7.5 | 6.3 |
| Sparks · 30d | 2 | 1 |
| Top themes | workflow-automation, ai-agents, devtools, dbt | sdk, mobile-devtools, observability, eas |
| Last editorial update | 7d ago | 1h ago |
| Website | Visit → | — |
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.
What is Expo?
Expo kills its AI agent, SDK 58 beta arrives as EAS observability stack hits GA
Expo is at a turning point: the EAS infrastructure layer — build, update, and now observe — is maturing into production-grade tooling, with EAS Observe reaching GA in August and SDK 58 entering beta this week. Simultaneously, Expo shut down its AI Agent experiment after months in closed beta, a signal that building an AI coding assistant directly on the platform didn't reach product-market fit. The MCP server and Claude desktop integration indicate where the AI bet now sits: in connectors, not agents.
Windmill vs Expo: editorial side-by-side
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.
Expo
6.3INFRA · APIS
Expo kills its AI agent, SDK 58 beta arrives as EAS observability stack hits GA
◆ Current state
Expo is at a turning point: the EAS infrastructure layer — build, update, and now observe — is maturing into production-grade tooling, with EAS Observe reaching GA in August and SDK 58 entering beta this week. Simultaneously, Expo shut down its AI Agent experiment after months in closed beta, a signal that building an AI coding assistant directly on the platform didn't reach product-market fit. The MCP server and Claude desktop integration indicate where the AI bet now sits: in connectors, not agents.
◆ Where it's heading
Expo is consolidating around EAS as an observable infrastructure layer, not as an AI product builder. The MCP server and third-party integrations (PostHog, Claude) suggest the strategy is to serve as a data and build substrate that AI tools operate on top of. SDK 58 will push new device capabilities through the standard pipeline; EAS Observe data becoming a programmable surface for AI tools is the natural next extension of this approach.
◆ Prediction
The next move is a stable SDK 58 release and deeper AI-tool integrations via MCP — Expo is betting its AI story on being the substrate that coding assistants operate on, not on shipping its own. Expect more one-command observability integrations to follow PostHog.
Alternatives to Windmill and Expo
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 Windmill or Expo.
Redocly
Redocly ships a built-in MCP server page across its entire docs platform, with public and authenticated endpoints
Jackett
Jackett in pure tracker-maintenance mode, daily domain and category updates only
Skipper
Skipper adds Redis as a distributed L2 cache backend amid a high-frequency patch cadence.
Kubernetes
Kubernetes v1.37 matures its memory management and scheduling stack for AI/ML workloads.
GitHub
GitHub Copilot gets cost-aware inference tiers as enterprise AI tooling tightens across the platform.
See all Windmill alternatives → · See all Expo alternatives →
Recent activity from Windmill and Expo
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 19h agoExpoExpo SDK 58 Beta is now available ⚡
- 7d agoExpoConnect PostHog to your Expo app in one command
- 11d agoWindmillGuest access for apps ⚡
- 23d agoWindmillAI agent evals (beta) ⚡
- 23d agoWindmillAI usage and cost tracking
- 26d agoWindmillApplication default credentials for GCP Pub/Sub triggers
- 27d agoExpoEAS Observe is now generally available
- 1mo agoWindmillPlan mode for AI sessions
- 1mo agoExpoConnect Expo in the Claude desktop app
- 1mo agoWindmillNested filter groups and dotted paths in trigger filters
- 1mo agoExpoExpo Agent: ending the closed beta and winding the project down ⚡
- 1mo agoExpoEAS Observe GA scheduled for August 20
Frequently asked questions
What is the difference between Windmill and Expo?
Both compete on the same themes — observability — within Infra & APIs. Windmill is currently shipping more aggressively (velocity 7.5 vs 6.3), with 2 editorial sparks in the last 30 days against 1. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Windmill better than Expo?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Windmill is currently shipping more aggressively (velocity 7.5 vs 6.3), with 2 editorial sparks in the last 30 days against 1. For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.
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.
What are the best alternatives to Expo?
Top Expo alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Expo alternatives" section above for the current picks, or visit /alternatives/expo for the full list with editorial commentary on each.