> For the complete documentation index, see [llms.txt](https://support.sayprimer.com/primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.sayprimer.com/primer/build-and-manage-audiences/building-an-audience/building-an-anti-icp-exclusion-audience.md).
# Building an Anti-ICP Exclusion Audience
An Anti‑ICP Exclusion Audience is an optional add‑on product that lets you exclude a very large group of people or companies — up to 50 million records — from your ad campaigns. They’re designed to make it easy to remove non‑ICP ad impressions at scale, without having to split exclusion lists into multiple smaller audiences.
#### When should I use an Anti-ICP Exclusion Audience?
Anti-ICP Exclusion Audience is useful when you want to exclude large groups of people who are unlikely to become customers.
Common use cases include:
* Companies outside your target size range
* Industries that are not a fit for your business
* Competitors
* Existing customers
* Internal employees or partners
* Specific departments that fall outside your target ICP
#### How it Works
Anti-ICP Exclusion Audiences are a product add-on. Each Primer organization comes with a free 45 day trial of this Anti-ICP product. The trial can be started at any point by clicking the button at the top of the dashboard “Try Exclusion Audiences”
If you’d like to draft a subsequent Anti-ICP Audience, select from the “Exclusion” option from the “Create Audience” dropdown in the Dashboard
To build an Anti-ICP Exclusion Audience
* Set exclusion criteria using filters like company size, industry, job title, and location.
* Save and sync the audience to your selected ad platforms.
* Apply the audience as an exclusion in your campaigns and ad sets to prevent ads from serving to anyone in the matched list.
Anti- ICP Exclusion Audiences refresh automatically once a month to ensure your exclusions remain up to date.
#### Related Plays
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#### Supported destinations
Anti-ICP Exclusion Audiences currently support:
* Meta
* Google
* LinkedIn
Reddit and DV360 are not supported at this time.
#### FAQs
* **What if my Anti‑ICP Audience size is more than 50 million?**
An Anti-ICP Audience supports a size of up to 50M records. If your audience exceeds this limit, refine your filters (e.g., company size, industry, or geography) to reduce the count or request an additional audience.
* **What if my Anti‑ICP Audience size is less than 3 million? Do I still need Anti‑ICP?**
For audiences under 3M, you can use Primer’s standard audiences as exclusions. Anti-ICP is most valuable for excluding very large audiences, but you can still use it for smaller lists if you prefer a single workflow.
* **Why is Reddit not included in it?**
Anti-ICP currently supports Meta, LinkedIn, and Google. Reddit has different custom audience requirements, but standard audiences can still be synced through and used as exclusion in the existing integration.
* **What is the matching time for an Anti‑ICP audience?**
Anti ICP Audience are typically matched in 72 hours.
* **Do I need to purchase an additional Anti-ICP Audience?**
Yes. Anti-ICP Audiences are sold as an add-on (see [Pricing page](https://www.sayprimer.com/pricing)). Each purchased audience slot supports one Anti ICP Audience.
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