Speculation Rules
Google, Mountain View, California, United StatesThe Speculation Rules API is a browser API that improves navigation performance by prefetching or prerendering pages that users are likely to visit next.
It uses 
JSON-based rules embedded in 
HTML or HTTP headers, and is designed as a successor to older techniques such as 
Prefetch and the deprecated Prerender attribute.
The API is currently supported mainly in Chromium-based browsers such as Google Chrome and Microsoft Edge, and not supported by Safari and Firefox.
According to our data, Speculation Rules is the third most popular performance optimization technology on the web.
It has 44.5% of the performance optimization market share and is present on 27% of all websites.
- 🏠 Website
- </> Source code
- 🔗 Links
GitHub📊 Rankings and Market Share
- Performance Optimization
- Rank: 3
- Market share: 44.5%
- Standards
- Rank: 8
- Market share: 29.8%
🏆 Speculation Rules Awards
- 🥈 Second most popular in Germany in the Performance Optimization category.
- 🥈 Second most popular in Switzerland in the Performance Optimization category.
- 🥈 Second most popular in Iran in the Performance Optimization category.
- 🥈 Second most popular in Finland in the Performance Optimization category.
- 🥈 Second most popular in Trinidad and Tobago in the Performance Optimization category.
- 🥈 Second most popular in Liechtenstein in the Performance Optimization category.
- 🥈 Second most popular in Rwanda in the Performance Optimization category.
- 🥈 Second most popular in the Maldives in the Performance Optimization category.
- 🥈 Second most popular in Barbados in the Performance Optimization category.
- 🥈 Second most popular in New Caledonia in the Performance Optimization category.
⚡ Sites Using Speculation Rules
We have data on 1,031,042 websites that use Speculation Rules performance optimization technology. Here is a list of some of the top ranked ones.
The highest rated site using Speculation Rules is 
bitly.com.
| # | Website | Rank | Country | Language |
|---|---|---|---|---|
| 1 | bitly.com |
#17 | United States | American English |
| 2 |  wordpress.com |
#83 | United States | English |
| 3 | #140 | United States | American English | |
| 4 | #142 | United Kingdom | English | |
| 5 | #228 | American English | ||
| 6 | #234 | Poland | Polish | |
| 7 |  magnite.com |
#297 | United States | American English |
| 8 | #303 | United States | American English | |
| 9 | #337 | English | ||
| 10 | #365 | United States | American English | |
| 11 | semrush.com | #378 | United States | English |
| 12 | #385 | Italy | Italian | |
| 13 | #392 | Poland | Polish | |
| 14 | #447 | American English | ||
| 15 |  code.jquery.com |
United States | American English | |
| 16 | #472 | American English | ||
| 17 | #499 | Croatia | Croatian | |
| 18 | #520 | English | ||
| 19 | #544 | India | English | |
| 20 | #556 | United States | American English |
📈 Usage Statistics
Most of the sites that use Speculation Rules:
- are located in the United States
- have content in English
- use the .com domain extension
- fall into the Business category.
Most of the sites using Speculation Rules are from the United States, the United Kingdom, and Germany.
- United States 23.8%
- United Kingdom 7.2%
- Germany 6%
- Japan 4.9%
- France 4.4%
- Spain 4.2%
- Italy 3.8%
- Australia 3.6%
- Netherlands 3.1%
- Other 39%
Most Speculation Rules users speak English, Spanish, or German.
- English 56.7%
- Spanish 6%
- German 6%
- French 4.6%
- Japanese 4.2%
- Italian 3%
- Portuguese 2.4%
- Dutch 2.4%
- Polish 1.5%
- Other 13.2%
Speculation Rules performance optimization technology is especially popular on .com and .org top-level domains.
- .com 46%
- .org 7.7%
- .de 3.8%
- .co.uk 2.5%
- .net 2.5%
- .it 2.1%
- .com.au 2%
- .nl 1.9%
- .fr 1.7%
- Other 29.8%
The primary market segments for websites utilizing Speculation Rules include business, marketing and merchandising, and blogs and wiki.
- Business 18.4%
- Marketing/Merchandising 11.6%
- Blogs/Wiki 8.7%
- Online Shopping 7.5%
- Education/Reference 5.9%
- Internet Services 4.7%
- Travel 4.1%
- Entertainment 4.1%
- Health 3.8%
- Other 31.2%
🕵️ Similar Technologies
These are some of the best Speculation Rules alternatives.
🆚 Compare Alternatives
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💬 Frequently Asked Questions
What is the company behind Speculation Rules?
Speculation Rules is owned by Google LLC, headquartered in Mountain View, California, United States.
Which country uses Speculation Rules the most?
The majority of Speculation Rules users are from the United States.
Who uses Speculation Rules?
According to our data, Speculation Rules is used on millions of sites, including such established ones as bitly.com, wordpress.com, and nypost.com.
Is Speculation Rules used on government websites?
In total, we found Speculation Rules on 560 government sites in the United States.
Do academic institutions use Speculation Rules?
Yes, quite a few! Overall, we know of 1,755 academic websites in the United States that use Speculation Rules.
How does Speculation Rules compare to its competitors?
Speculation Rules is one of the most popular performance optimization technologies, second only to DNS Prefetch and ⏳ Lazy loading.
What are the alternatives to Speculation Rules?
Alternatives and possible competitors to Speculation Rules may include DNS Prefetch, Preconnect, and Preload.
👉 See Also
🗃️ 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 3,823,966 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.