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Comparison · Infra & APIs
Retool vs Windmill
A side-by-side editorial comparison of Retool and Windmill — release velocity, themes, recent moves, and the top alternatives to consider.
Retool vs Windmill: at a glance
What is Retool?
Retool is giving its app-building agent the branching model human developers already had.
Retool's changelog splits cleanly in two. The app builder is accumulating agent and version-control mechanics — several agent conversations open per branch, checkout of branches created outside Retool, and an agent that asks clarifying questions before building. The other half is enterprise housekeeping: BYOK AI token usage now has an endpoint and an analytics page, Microsoft SQL integration versions 1.0 and 2.0 are deprecated in favor of 3.0, and self-hosted instances moving to 4.31 must run a one-time permissions database migration.
What is Windmill?
A workflow engine where the AI builds the scripts and the enterprise gates come down
Windmill's July stream is dominated by AI sessions, now in beta and on by default: each session ties a chat to a workspace or fork with a live preview, builds scripts, flows and apps as reviewable drafts, and runs many in parallel. Supporting work landed around it — file attachments in chat, visible web-search sources, in-app git-to-Windmill sync, and schema contracts that warn when a consumer script drifts from a producer's materialized table.
Retool vs Windmill: editorial side-by-side
Retool
6.3INFRA · APIS
Retool is giving its app-building agent the branching model human developers already had.
◆ Current state
Retool's changelog splits cleanly in two. The app builder is accumulating agent and version-control mechanics — several agent conversations open per branch, checkout of branches created outside Retool, and an agent that asks clarifying questions before building. The other half is enterprise housekeeping: BYOK AI token usage now has an endpoint and an analytics page, Microsoft SQL integration versions 1.0 and 2.0 are deprecated in favor of 3.0, and self-hosted instances moving to 4.31 must run a one-time permissions database migration.
◆ Where it's heading
The agent is being fitted into an existing engineering workflow rather than placed beside it: branches, parallel threads, and clarification before action are all borrowed from how teams already review code. On the operations side Retool is billing customers for their own model keys and pruning integration versions, which is what a platform does when self-hosted enterprise deployments are the base it has to keep upgradeable. Edge channel releases keep arriving for self-hosted organizations at roughly weekly intervals.
◆ Prediction
The branch and thread work points toward the app-building agent being usable by more than one person at a time on the same app, so review and merge mechanics are the natural next step. The MS SQL deprecation notice sets up a forced cutover that Retool will have to date.
Windmill
7.5INFRA · APIS
A workflow engine where the AI builds the scripts and the enterprise gates come down
◆ Current state
Windmill's July stream is dominated by AI sessions, now in beta and on by default: each session ties a chat to a workspace or fork with a live preview, builds scripts, flows and apps as reviewable drafts, and runs many in parallel. Supporting work landed around it — file attachments in chat, visible web-search sources, in-app git-to-Windmill sync, and schema contracts that warn when a consumer script drifts from a producer's materialized table.
◆ Where it's heading
Two moves are running together. The authoring model is shifting from writing scripts to reviewing generated ones, with the diff drawer and draft state as the safety mechanism rather than trusting the model outright. Meanwhile the commercial line is being redrawn: BigQuery and Snowflake left the Enterprise tier for community edition, including self-hosted. Windmill is trading connector exclusivity for adoption while the AI layer becomes the thing worth paying for.
◆ Prediction
Expect AI sessions to leave beta with governance around it — who can deploy a generated draft, and what an autonomous session may touch — since the draft-and-diff design already anticipates that review step.
Alternatives to Retool 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 Retool or Windmill.
Pressable
Pressable is shipping near-daily, and MCP is being maintained as a peer surface to its API.
Cosmic
Cosmic retired AI Studio and gave its agents goals — the CMS is becoming an agent runtime.
Pipedream
Pipedream put OAuth on its 10,000-tool MCP server and annotated every tool read or write.
VictoriaMetrics
Five of six VictoriaMetrics entries are scraped GitHub page furniture; one is a real LTS patch.
Buildkite
Buildkite is forcing a major agent upgrade and handing agents a shortcut through failures.
See all Retool alternatives → · See all Windmill alternatives →
Recent activity from Retool and Windmill
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 16h agoRetoolBYOK AI token management
- 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
- 6d agoWindmillBigQuery and Snowflake available in the community edition
- 6d agoRetoolAgent-generated questions to clarify user intent
- 9d agoWindmillAI sessions (beta) ⚡
- 10d agoWindmillAttach text files to AI chat messages
- 11d agoWindmillWeb search sources in AI chat
- 15d agoWindmillAutomatic git-to-Windmill sync
- 26d agoWindmillSchema contracts for pipeline consumers
Frequently asked questions
What is the difference between Retool and Windmill?
They serve adjacent needs but don't currently overlap on shipped themes. Windmill is currently shipping more aggressively (velocity 7.5 vs 6.3), 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 Retool 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 6.3), with 1 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 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.
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.