Interest-Based Advertising Opt-Out
The interest-based advertising opt-out allowed sites to exclude themselves from Federated Learning of Cohorts (FLoC) cohort calculations using the "interest-cohort=()" permission policy. It is now deprecated and support for it has been removed from Chromium in February 2022.
According to our data, Interest-Based Advertising Opt-Out is the 8th most popular browser API on the web.
It has 1.3% of the browser API market share and is detected on 0.5% of all websites.
It appears on 3.3% of all websites in Austria, 1.6% in Germany, and 1.5% in Switzerland.
- 🏠 Website
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Wikipedia📊 Rankings and Market Share
- Browser APIs
- Rank: 8
- Market share: 1.3%
🏆 Interest-Based Advertising Opt-Out Awards
- ⭐ 4th most popular in Austria in the Browser APIs category.
- ⭐ 5th most popular in Belarus in the Browser APIs category.
- ⭐ 6th most popular in Germany in the Browser APIs category.
- ⭐ 6th most popular in Switzerland in the Browser APIs category.
- ⭐ 6th most popular in Russia in the Browser APIs category.
- ⭐ 6th most popular in Greece in the Browser APIs category.
- ⭐ 6th most popular in Hungary in the Browser APIs category.
- ⭐ 6th most popular in Taiwan in the Browser APIs category.
- ⭐ 6th most popular in Vietnam in the Browser APIs category.
- ⭐ 6th most popular in Croatia in the Browser APIs category.
⚡ Sites Using Interest-Based Advertising Opt-Out
We have data on 18,963 websites that use the Interest-Based Advertising Opt-Out browser API. Here is a list of some of the top ranked ones.
The highest rated site using Interest-Based Advertising Opt-Out is 
gov.uk.
| # | Website | Rank | Country | Language |
|---|---|---|---|---|
| 1 | gov.uk |
#82 | United Kingdom | English |
| 2 |  discord.com |
#100 | United States | English |
| 3 |  youradchoices.com |
#105 | United States | English |
| 4 |  gitlab.com |
#245 | United States | American English |
| 5 | #303 | United States | American English | |
| 6 | #455 | United States | American English | |
| 7 | #615 | France | American English | |
| 8 | #670 | Japan | Japanese | |
| 9 | web.archive.org | United States | English | |
| 10 | #1,071 | France | French | |
| 11 | #1,266 | English | ||
| 12 | #1,613 | United States | English | |
| 13 | #1,751 | Canada | French | |
| 14 | #2,005 | Germany | German | |
| 15 | #2,025 | United States | American English | |
| 16 | #2,160 | United States | English | |
| 17 | United States | American English | ||
| 18 | #2,400 | India | English | |
| 19 | #2,430 | Slovakia | Slovak | |
| 20 | #2,619 | Sweden | Swedish |
📈 Usage Statistics
Most of the sites that use Interest-Based Advertising Opt-Out:
- are located in Germany
- have content in English
- use the .com domain extension
- fall into the Business category.
Most of the sites using Interest-Based Advertising Opt-Out are from Germany, the United States, and Austria.
- Germany 24.1%
- United States 11%
- Austria 6.9%
- United Kingdom 5.6%
- France 4.9%
- Switzerland 4%
- Netherlands 3.4%
- Russia 3.2%
- Italy 2.8%
- Other 34.1%
Most Interest-Based Advertising Opt-Out users speak English, German, or French.
- English 43.7%
- German 24.2%
- French 4.9%
- Spanish 3.6%
- Russian 3.6%
- Dutch 3%
- Italian 2.3%
- Chinese 1.7%
- Portuguese 1.2%
- Other 11.8%
The Interest-Based Advertising Opt-Out browser API is especially popular on .com, .de, and .org top-level domains.
- .com 25.9%
- .de 16.6%
- .org 8%
- .at 4.6%
- .ch 2.9%
- .net 2.6%
- .ru 2.4%
- .fr 2.1%
- .nl 2%
- Other 32.9%
The primary market segments for websites utilizing Interest-Based Advertising Opt-Out include business, marketing and merchandising, and education and reference.
- Business 18.9%
- Marketing/Merchandising 9.4%
- Education/Reference 8.8%
- Internet Services 5.2%
- Travel 4.3%
- Blogs/Wiki 4.2%
- Online Shopping 4.1%
- Software/Hardware 4%
- Health 4%
- Other 37.1%
🕵️ Similar Technologies
These are some of the best Interest-Based Advertising Opt-Out alternatives.
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💬 Frequently Asked Questions
Which country uses Interest-Based Advertising Opt-Out the most?
The majority of Interest-Based Advertising Opt-Out users are from Germany.
Who uses Interest-Based Advertising Opt-Out?
According to our data, Interest-Based Advertising Opt-Out is used on thousands of sites, including such established ones as gov.uk, discord.com, and youradchoices.com.
Is Interest-Based Advertising Opt-Out used on government websites?
Yes, for example, it is used by tsa.gov. Overall, we found Interest-Based Advertising Opt-Out on 18 government sites in the United States.
Do academic institutions use Interest-Based Advertising Opt-Out?
Yes. The most notable of these is usg.edu. In total, we know of 44 academic websites in the United States that use Interest-Based Advertising Opt-Out.
How does Interest-Based Advertising Opt-Out compare to its competitors?
Interest-Based Advertising Opt-Out is a moderately popular browser API, ranking ahead of 10 other browser APIs we track.
What are the alternatives to Interest-Based Advertising Opt-Out?
Alternatives and possible competitors to Interest-Based Advertising Opt-Out may include Origin Trials, Web Storage, and 
Fetch.
🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 4,001,723 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.