Service limits

Note: Starting Q2 2026, the hard limits listed on this page will be strictly enforced for all newly created flows. Existing flows will have a grace period to be optimized. Flows created, cloned, imported, or installed from the Marketplace after this date will be immediately subject to all hard limits.

Hard and soft limits

Each limit on this page has an Enforcement value that indicates how the limit is applied:

General flow limits

The following table shows the limits that apply to the overall flow configuration and execution.

Name Limit Enforcement What happens if exceeded
Flow run data maximum size 80 MB Soft Flow run data: combined size of all data supplied to and retrieved by the flow during each run from the initial trigger step to the final flow step. This also includes internal data that the flow needs to run, such as actions metadata, parameters, and so forth.
Recommended maximum payload size ~25 MB Soft Exceeding it does not return an automatic error, but triggers a warning. However, consequences can still be significant: degraded flow performance, the flow stopping before completion, a processing timeout or, in some cases, data loss. Attachments count towards both this total and the maximum size of flow run data.
Maximum number of actions per flow 8 000 actions in five minutes per flow Hard If the limit is exceeded, the flow is disabled but it can be manually enabled after one minute.
Note: This does not apply to Marketplace flows.
Flow history retention 90 days (inferred) Hard Flow run history older than 90 days is removed.

Iteration and loop limits

The following table shows the limits that apply to loops and iterations within flows.

Name Limit Enforcement What happens if exceeded
Maximum number of iterations using the For each action 1000 per level Soft The limit of the number of iterations may vary according to the size of each iteration.
Maximum number of iterations in a liquid loop 10 000 Hard This count includes all iterations, including nested loops. The flow is stopped if the limit is reached.
Maximum number of iterations using the Until action 1000 per level Hard The flow is stopped when the maximum number of iterations is reached.

Data size limits

The following table shows the limits that apply to data storage and input sizes.

Name Limit Enforcement What happens if exceeded
Parameters maximum number of characters 10 000 characters Hard Trying to input or reference data bigger than the limit takes only the first 10 000 characters.
Variables maximum size 25 KB Hard Trying to input or reference data bigger than the limit takes only the first 25 KB.
Webhook maximum input size 25 MB Hard If the input is bigger, a 413 error (Request Entity Too Large) is returned.

Execution and timeout limits

The following table shows the limits that apply to action execution duration and timeouts.

Name Limit Enforcement What happens if exceeded
Action maximum duration 10 minutes / 4 retries Hard The maximum run time for an action is determined by the setup of two different variables on its Azure function: Timeout and maximum number of retries.
HTTP request maximum timeout 100 seconds Hard

Note: The Unit4 Ava action is excluded since it is intended to manage asynchronous responses from an external service that needs it to hibernate until it is called again to continue the execution.

Communication limits

The following table shows the limits that apply to email and external communication actions.

Name Limit Enforcement What happens if exceeded
Email sender action limit per month 2 500 000 emails Hard The limit is shared across all the tenants of your region.

Trigger-specific limits

The following table shows the limits that apply to triggers.

Name Limit Enforcement What happens if exceeded
Webhook maximum request rate Communicated in the HTTP response Hard Error 429 (Too Many Requests) is returned.

Action-specific limits

The following sections show the limits that apply to specific actions and their unique constraints.

Run code action

The following table shows the limits that apply to the Run code action:

Limit Value Enforcement What happens if exceeded
Maximum allowed depth of recursion 100 Hard Recursive scripts can only execute 100 levels of depth.
Script execution 600 sec (10 min) Hard The execution fails with a timed-out result.
Maximum size allowed for arrays 10M elements Hard
Maximum number of statements 500M Hard This includes variable declarations, conditional blocks, loops, function calls and such.