How do I connect Sub Flows?

Add the Sub Flows piece to a flow. Once connected, its 1 trigger and 3 actions are available anywhere in the builder.

What can I automate with Sub Flows?

"Callable Flow" can start a flow that runs "Call Flow", and you can chain Sub Flows together with any of 770+ other apps and AI steps in between.

Can I self-host the Sub Flows integration?

Yes. Activepieces is fully self-hostable, so you can run the Sub Flows piece on your own infrastructure with your connections and your data staying in your environment.

Can my AI agent use Sub Flows as a tool?

Yes. Every piece you connect can be exposed over one Activepieces MCP server, so Claude, Cursor, Windsurf or any MCP client can call Sub Flows actions as tools.

Sub Flows integration

Trigger and call another sub flow.

Start building Use Sub Flows with your AI

Actions: 3
Triggers: 1
License: MIT, open source
Updated: September 2026

About the Sub Flows integration

Add the Sub Flows piece to a flow, connect your account once, and the rest of the builder can read from it and write to it. Because the piece is open source you can run it on our cloud or self-host it, and combine Sub Flows with 770+ other apps in the same flow.

Triggers

Start a flow the moment something happens in Sub Flows

Each trigger below can start a flow on its own, either instantly or on a schedule.

Callable Flow
Waiting to be triggered from another flow
2 fields

Actions

Everything Activepieces can do in Sub Flows

Drop any of these into a flow and fill in the fields. No code is required.

Call Flow
Call a flow that has "Callable Flow" trigger
4 fields
Stream CSV to Subflows
Stream a CSV and call a subflow once per batch of rows, without loading the whole file into memory.
5 fields
Return Response
Return response to the original flow
2 fields

Use Sub Flows in a flow

Connect Sub Flows once and every trigger and action above is yours to drop into the builder, alongside 770+ other apps. Free to start, on our cloud or your own servers.

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Sub Flows, answered.

Yes. Activepieces is open source and free to start, and the Sub Flows piece is included on every plan, from the free cloud tier to any self-hosted deployment.