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 5th most popular performance optimization technology on the web.
It has 30.7% of the performance optimization market share and is present on 17.7% of all websites.
- 🏠 Website
- </> Source code
- 🔗 Links
GitHub📊 Rankings and Market Share
- Performance Optimization
- Rank: 5
- Market share: 30.7%
- Standards
- Rank: 11
- Market share: 19.6%
🏆 Speculation Rules Awards
- 🥉 Third most popular in the Philippines in the Performance Optimization category.
- 🥉 Third most popular in Estonia in the Performance Optimization category.
- 🥉 Third most popular in Bosnia and Herzegovina in the Performance Optimization category.
- 🥉 Third most popular in Macedonia in the Performance Optimization category.
- 🥉 Third most popular in Malta in the Performance Optimization category.
- 🥉 Third most popular in Albania in the Performance Optimization category.
- 🥉 Third most popular in Uganda in the Performance Optimization category.
- 🥉 Third most popular in Honduras in the Performance Optimization category.
- 🥉 Third most popular in Jamaica in the Performance Optimization category.
- 🥉 Third most popular in Trinidad and Tobago in the Performance Optimization category.
⚡ Sites Using Speculation Rules
We have data on 642,131 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 | #234 | Poland | Polish | |
| 6 |  magnite.com |
#297 | United States | American English |
| 7 | #303 | United States | American English | |
| 8 | #337 | English | ||
| 9 | semrush.com | #378 | United States | English |
| 10 | #385 | Italy | Italian | |
| 11 | #392 | Poland | Polish | |
| 12 | #447 | American English | ||
| 13 | #467 | Singapore | English | |
| 14 |  code.jquery.com |
United States | American English | |
| 15 | #472 | American English | ||
| 16 | #499 | Croatia | Croatian | |
| 17 | #520 | English | ||
| 18 | #556 | United States | American English | |
| 19 | #578 | India | American English | |
| 20 | #590 | United Kingdom | British 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 24%
- United Kingdom 7.8%
- Germany 5.7%
- France 4.7%
- Japan 4.2%
- Spain 3.8%
- Italy 3.5%
- Australia 3.2%
- Canada 3.1%
- Other 40%
Most Speculation Rules users speak English, Spanish, or German.
- English 59.8%
- Spanish 6%
- German 4.8%
- French 4.4%
- Japanese 3.4%
- Italian 2.7%
- Portuguese 2.4%
- Dutch 1.9%
- Polish 1.4%
- Other 13.2%
Speculation Rules performance optimization technology is especially popular on .com and .org top-level domains.
- .com 47.6%
- .org 8.3%
- .de 3%
- .net 2.6%
- .co.uk 2.5%
- .it 1.8%
- .fr 1.6%
- .com.au 1.6%
- .com.br 1.4%
- Other 29.6%
The primary market segments for websites utilizing Speculation Rules include business, marketing and merchandising, and blogs and wiki.
- Business 17.5%
- Marketing/Merchandising 10.9%
- Blogs/Wiki 8.8%
- Online Shopping 8.3%
- Education/Reference 6.1%
- Internet Services 4.6%
- Entertainment 4.2%
- Travel 3.8%
- Health 3.6%
- Other 32.2%
🕵️ 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 thousands 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 400 government sites in the United States.
Do academic institutions use Speculation Rules?
Yes, quite a few! Overall, we know of 1,514 academic websites in the United States that use Speculation Rules.
How does Speculation Rules compare to its competitors?
Speculation Rules is a fairly popular performance optimization technology, ranking ahead of 29 other performance optimization technologies we track.
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 3,629,123 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.