Free alternatives to Retool Workflows

Last updated 19 Oct 2026 · 4 options

Quick answer: ToolJet has the most stars on its repository of the 4 options here (★ 41.1k), followed by Appsmith (★ 41.1k). Stars show popularity, not fit, so check formats, platforms and licence for your own work.

Retool's workflow automation alongside its internal-tools builder. Here are 4 free options, most-starred first.

ToolJet

AI agent workflows

Open-source internal tools builder with workflows and apps

Stars: ★ 41.1k
Licence: GPL-3.0
Updated: 3 days ago

Self-host or cloud
Commercial OK

Alternative to Retool Workflows, Zapier

Appsmith

AI agent workflows

Open-source internal apps platform with JS logic and datasources

Stars: ★ 41.1k
Licence: Apache-2.0
Updated: today

Self-host or cloud
Commercial OK

Alternative to Retool Workflows

Windmill

Job orchestrators & durable workflows

Open-source developer platform for scripts as workflows

Stars: ★ 18.2k
Licence: AGPL-3.0
Updated: today

Self-host or cloud
Commercial OK

Alternative to Pipedream, Retool Workflows

Trigger.dev

Job orchestrators & durable workflows

Open-source background jobs and durable workflows for TypeScript

Stars: ★ 16.6k
Licence: Apache-2.0
Updated: today

Self-host or cloud
Commercial OK

Alternative to Pipedream, Zapier

FAQ

Is there a free alternative to Retool Workflows?

Yes. AutomationAlts lists 4 options: ToolJet, Appsmith, Windmill and Trigger.dev.

Which Retool Workflows alternatives are open source?

ToolJet (GPL-3.0), Appsmith (Apache-2.0), Windmill (AGPL-3.0) and Trigger.dev (Apache-2.0).

Which Retool Workflows alternatives can I self-host?

ToolJet, Appsmith, Windmill and Trigger.dev (all of them).

Related categories: AI agent workflows · Job orchestrators & durable workflows

Licences differ a lot in this niche. n8n's Sustainable Use License is source-available, not OSI open source. Check each licence before you build a product on top of the code.