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Websites using sIFR

sIFR is a JavaScript and Adobe Flash dynamic web fonts implementation.

Lead List Exporter

2.9k live sIFR sites, ready to export.

That's how many sIFR websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.

Pick a ready-made template, or build your own filters in the Lead List Exporter and pay only for the rows you export.

Open the Lead List Exporter

Just need a few domains? Export up to 10 free from a subset of our crawl.

Start with a list template

Every sIFR website we detected in the United States.

Only sites where a personal, company-hosted email was found.

Sites with at least one personnel LinkedIn profile.

Start with the highest-traffic end of the dataset.

Limit results to sIFR websites on .com domains.

Only sites where an organisation phone number was found.

Create your own

How many websites use sIFR?

We found sIFR on 2,993 websites in our September 2026 crawl, across 67 countries.

Which countries use sIFR the most?

By number of websites, the top countries are United States (48%, 1,441 sites), Netherlands (6%, 188 sites), United Kingdom (6%, 177 sites), Germany (5%, 159 sites) and France (3%, 94 sites). Together they account for 69% of the 2,993 sIFR sites we track. 61% of the sites are in English, and .com is the most used domain ending, on 60% of them.

Where are sIFR websites hosted?

The networks carrying the most sIFR sites are Google LLC (875 sites), Cloudflare, Inc. (204 sites) and Amazon.com, Inc. (106 sites).

What technologies are used with sIFR?

Across the 2,993 sIFR sites we track, the technologies most often found alongside it are jQuery (40%, 1,196 sites), HTTP/3 (37%, 1,097 sites), PHP (33%, 994 sites), Java (31%, 923 sites) and OpenGSE (31%, 913 sites).

Deep Dive

Breakdown of sIFR websites

What else they run, plus their language, hosting network, domain extension and country.

FAQ

Answers drawn from our latest crawl of sIFR websites. Anything else, email us and we will look it up.

Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.