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

# Concurrency and Rate limits

> Rate limiting and transcriptions concurrency

In order to provide a smooth experience and optimal performance for all users, Gladia accounts can have up to **3** differents limits
for **Free**, **Paid** & **Enterprise** users :

<Note>
  Need a higher concurrency limit?

  The value listed below are default values. We can provide high concurrencies based on your needs, so feel free to
  [contact us](https://www.gladia.io/contact).
</Note>

| Plan type      | Usage limit <br /> (per month) | Max Transcriptions in concurrency <br />(pre-recorded) | Max Transcriptions in concurrency (Live) |
| -------------- | ------------------------------ | ------------------------------------------------------ | ---------------------------------------- |
| **Enterprise** | Unlimited                      | On demand                                              | On demand                                |
| **Paid**       | Unlimited                      | 25                                                     | 30                                       |
| **Free**       | 10 Hours                       | 3                                                      | 1                                        |

* **Usage limit** : (**free-tier** users only)

  This determines the number of hours a user can transcribe a given month. This is a limitation for free tier users only.

* **Concurrency** : (depending on free/paid tier)

  This refers to the maximum number of transcription (pre-recorder or real-time) that a user can process at the same time.
  For asynchronous transcriptions, Paid plan users can queue up to 300 requests, but only will still have 25 max processed concurrently.

* **Realtime session duration** : (all plans)

  A single realtime (live) transcription session cannot exceed **3 hours**. After 3 hours, the session will be terminated. For longer events, start a new session when approaching the limit.

* **API level rate limit** : (same for every user)

  Which is the number of API calls that a user can make within a particular time frame.
  This is to ensure that a single user or malicious actor doesn't affect the performance of the API for all the other users.