> ## Documentation Index
> Fetch the complete documentation index at: https://docs.platform.aiplanet.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Execution Limits & Quotas

> Concurrency and usage limits that keep workflows running reliably.

The platform applies limits to keep workflow execution stable and fair across your organization. This page explains the limits you may encounter and how to work with them.

## Concurrency limits

To keep the platform responsive, there's a cap on how many runs can execute **at the same time**:

* A limit **per workflow** — how many runs of a single workflow can run concurrently.
* A limit **per organization** — how many runs across all your workflows can run concurrently.

When a concurrency limit is reached, a new run is rejected rather than queued — the trigger returns an error and you retry once a slot frees up. In practice, most workflows finish quickly and slots free up continuously.

<Note>
  A single thread runs one execution at a time. Sending a new message in a thread waits for the previous run in that thread to finish.
</Note>

## API rate limits

Requests to the [API](/integrations-api/calling-workflows-api) are rate limited. If you send requests too quickly, the API responds with a rate-limit error — wait briefly and retry. Build retry handling into any integration that calls the API at volume.

## Working within limits

<Tip>
  If you regularly hit concurrency limits, stagger when workflows are triggered rather than starting many at once, and keep workflows efficient so runs finish quickly and free up slots.
</Tip>

* **Watch [Tracing](/running-monitoring/tracing)** to spot runs that are slower than expected.
* **Stagger bulk work** instead of triggering many runs simultaneously.
* **Retry on rate-limit errors** with a short delay in any API integration.

If your usage consistently exceeds the available limits, contact your platform administrator about raising them for your organization.

## Next steps

<Card title="Calling workflows via API" icon="code" href="/integrations-api/calling-workflows-api">
  Trigger workflows from your own applications.
</Card>