Best Website technology & competitor detectors Chrome extensions (2026)
The 15 most-used Website technology & competitor detectors on the Chrome Web Store, ranked by real store users. Listings rated under 3 stars on 20+ ratings are left out. See what a site is built with: CMS, frameworks, analytics, ads, fonts, traffic estimates and competitor intel.
Top 15 Website technology & competitor detectors, ranked
- 1
Stylish - Custom themes for any website
With hundreds of thousands of themes, skins & free backgrounds, you can customize any website with your own color scheme in a click.
≈2M users4.3★ from 22.3K ratingsUpdated 3 weeks ago8 permissions - 2
Domo - domain name info: WHOIS, RDAP, DNS & history lookup
Super detailed info for any domain name: registration status & dates, WHOIS, RDAP, DNS records, Name Servers, and more
≈20K users4.6★ from 14 ratingsUpdated 7 months ago3 permissions - 3
Country Flags & IP Whois
Displays country flag of website's server location, Whois and Geo info
≈20K users4.4★ from 94 ratingsUpdated 4 months ago7 permissions - 4
IP Whois
View info about IP, DNS records, SSL, country flag, domain whois, location, stats and more of any website.
≈10K users4.8★ from 20 ratingsNot updated for 2+ years4 permissions - 5
Open in Similarweb
Opens the current website in Similarweb for website traffic analysis.
≈9K users4.0★ from 4 ratingsUpdated 21 months ago2 permissions - 6
VStat 3 - visit statistics & website traffic
Web Traffic Analysis and Visitors Details SEO plugin. See visitors on icon. See trends. Similar sites and Similarweb info.
≈4K users4.8★ from 30 ratingsUpdated 10 days ago7 permissions - 7
waView, Image Viewer and Editor
Fast, offline image viewer built with WebAssembly technology. You can open 200 image formats including JPG, PNG, TIFF, JXR, RAW.
≈4K users3.0★ from 2 ratingsNot updated for 2+ years1 permissions - 8
UnderTheHood - Check Which Technology Is Behind Any Website
See what any website is built with: detect its full tech stack, 500+ technologies, plus security, SEO & speed checks.
≈2K users5.0★ from 2 ratingsUpdated 4 months ago5 permissions - 9
Who is Hosting this Website?
'Who is Hosting This Website?' is a free Add-on for telling you Who Is Hosting this Site and Domain Name Ownership records.
≈2K users4.6★ from 9 ratingsUpdated 3 months ago3 permissions - 10
Explorer for Similarweb - More Insights
Fast. Free. Open Similarweb with just one click.
≈2K users1.0★ from 2 ratings1 permissions - 11
Alexa-and-similarWeb-rank
Looking for your website rank from the alexa and similarWeb with a simple click.
≈1K users3.5★ from 4 ratingsNot updated for 4+ years1 permissions - 12
Open in Builtwith
Opens the current page in BuiltWith.
≈1K users5.0★ from 2 ratingsUpdated 21 months ago1 permissions - 13
Google Ads Competitor Analysis
Discover Google Ads Competitor Analysis - your intelligence tool to find competitor campaigns using Transparency tool.
≈1K users5.0★ from 1 ratingUpdated 3 months ago6 permissions - 14
Website ranking Traffic & Competitors
Free tool provides Alexa rank, traffic analytics, top keywords, and competitors website analysis to optimize your website.
≈1K users1.7★ from 6 ratings6 permissions - 15
SimilarWeb Website Traffic Rank,CSV Download
Displays and downloads CSV data from SimilarWeb, providing data on website traffic, rankings, and other relevant SEO information.
≈1K users5.0★ from 1 ratingNot updated for 3+ years1 permissions
Website technology & competitor detectors: questions
What is the most popular Website technology & competitor detectors Chrome extension?
Stylish - Custom themes for any website is the most used, with ≈2M users and a 4.3-star rating. Domo - domain name info: WHOIS, RDAP, DNS & history lookup is next with ≈20K users.
Which Website technology & competitor detectors extension has the best rating?
Of the listings with 100+ ratings, Stylish - Custom themes for any website rates highest: 4.3 out of 5 from 22.3K ratings.
Are these Website technology & competitor detectors still maintained?
2 of the 15 listed here were updated in the last 30 days. Each card shows how recently it was updated.