Depot
Depot now owns every tier from bare metal to git — build acceleration became a full CI platform.
Comparison · Infra & APIs
Windmill vs Retool
A side-by-side editorial comparison of Windmill and Retool — release velocity, themes, recent moves, and the top alternatives to consider.
Windmill vs Retool: at a glance
What is Windmill?
Windmill is building a DuckLake data-engineering stack on top of its workflow engine
Windmill has shifted much of its recent output into a DuckLake lakehouse layer — schema contracts, fork-isolated data environments, partition backfills, scheduled maintenance, and freshness watchdogs — while also ungating warehouse runtimes and adding reasoning controls to its AI agent steps. It's a high-cadence open-core product where the substance now sits in data engineering.
What is Retool?
Retool is fitting its app-building agent into a real git workflow, not around it.
The changelog is a steady stream of app-builder refinements centred on the building agent: multiple agent conversations per branch, checkout of branches created outside Retool, clarifying questions when a request is ambiguous, and support for the newest Claude and GPT model families. Alongside that sits operational housekeeping — a one-time permissions database migration required for self-hosted 4.31 and later, and the sunset of Microsoft SQL integration versions 1.0 and 2.0.
Windmill vs Retool: editorial side-by-side
Windmill
6.3INFRA · APIS
Windmill is building a DuckLake data-engineering stack on top of its workflow engine
◆ Current state
Windmill has shifted much of its recent output into a DuckLake lakehouse layer — schema contracts, fork-isolated data environments, partition backfills, scheduled maintenance, and freshness watchdogs — while also ungating warehouse runtimes and adding reasoning controls to its AI agent steps. It's a high-cadence open-core product where the substance now sits in data engineering.
◆ Where it's heading
The direction is a full data-engineering stack inside Windmill: reproducible pipelines, environment isolation, and observability around DuckLake, with the open-core line steadily loosening as BigQuery and Snowflake move into Community Edition. Expect continued DuckLake maturation and more Community/Enterprise runtime parity, with the heavier automation kept Enterprise.
◆ Prediction
Next likely moves are more DuckLake operational tooling — lineage, alerting, richer backfills — and additional AI-agent-step controls, keeping heavy automation like the freshness watchdog Enterprise-gated.
Retool
6.3INFRA · APIS
Retool is fitting its app-building agent into a real git workflow, not around it.
◆ Current state
The changelog is a steady stream of app-builder refinements centred on the building agent: multiple agent conversations per branch, checkout of branches created outside Retool, clarifying questions when a request is ambiguous, and support for the newest Claude and GPT model families. Alongside that sits operational housekeeping — a one-time permissions database migration required for self-hosted 4.31 and later, and the sunset of Microsoft SQL integration versions 1.0 and 2.0.
◆ Where it's heading
The agent is being fitted into the development workflow teams already have rather than replacing it. Per-branch threads and external branch checkout mean agent work is versioned the way engineers expect, while clarifying questions attack the rework loop that makes generated apps unusable. On the self-hosted side, a mandatory migration and integration sunsets show a platform tightening its supported surface as it grows.
◆ Prediction
The branch-and-thread work points toward review and merge flows for agent-authored changes, since versioning is now in place but nothing shown covers reconciling parallel threads on the same branch.
Alternatives to Windmill and Retool
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 Retool.
Cursor
Cursor is becoming a control plane for agent fleets — routed, governed, and driven from a phone.
SigNoz
SigNoz rebuilt its dashboards on an open spec so agents, not just people, can drive them.
Daytona
Ten releases in a month turning agent sandboxes into something you can meter, pause and fork
Auth0
Auth0 is turning B2B workarounds into product, and staking a claim on agent authorization.
Pressable
Pressable is building bulk operations and MCP governance for agencies that manage sites at scale
See all Windmill alternatives → · See all Retool alternatives →
Recent activity from Windmill and Retool
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoRetoolMultiple threads per branch in the app builder
- 1d agoRetoolPermissions database migration required in self-hosted Retool 4.31 and later
- 2d agoRetoolDeprecation of Microsoft SQL integration versions 1.0 and 2.0
- 2d agoRetoolCheck out local branches in app builder
- 5d agoWindmillBigQuery and Snowflake available in the community edition
- 6d agoRetoolAgent-generated questions to clarify user intent
- 6d agoRetoolNew models for building apps
- 8d agoWindmillAI sessions (beta)
- 9d agoWindmillAttach text files to AI chat messages
- 10d agoWindmillWeb search sources in AI chat
- 14d agoWindmillAutomatic git-to-Windmill sync
- 25d agoWindmillSchema contracts for pipeline consumers
Frequently asked questions
What is the difference between Windmill and Retool?
They serve adjacent needs but don't currently overlap on shipped themes. Windmill and Retool are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Windmill better than Retool?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Windmill and Retool are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). 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 Retool?
Top Retool alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Retool alternatives" section above for the current picks, or visit /alternatives/retool for the full list with editorial commentary on each.