Best alternatives to UnderTheHood - Check Which Technology Is Behind Any Website (2026)
10 Chrome extensions that do a similar job to UnderTheHood, closest first. Each shows real store users, its rating, how recently it was updated and how many permissions it asks for.
UnderTheHood - Check Which Technology Is Behind Any Website today
UnderTheHood alternatives, compared
- 1
Weblyzer - Website Technology Detector
Detect website technologies and review domain, DNS, headers, performance and SEO information in one place.
333 users5.0★ from 2 ratingsUpdated 8 days ago5 permissions- About 6.0× fewer users than UnderTheHood
- Updated more recently
- Listed under Developer Tools
- 2
Website SEO Checker
Get free on-page SEO report by 100+ parameters with the best website SEO checker
≈200K users4.6★ from 220 ratingsUpdated 7 months ago3 permissions- About 100× more users than UnderTheHood
- Updated less recently
- Asks for fewer permissions (3 vs 5)
- Listed under Developer Tools
- 3
Analysis SEO & Website Checker - PR-CY
Check your website on technical, seo content and popularity aspects.
≈8K users4.9★ from 571 ratingsNot updated for 2+ years3 permissions- About 4.0× more users than UnderTheHood
- Updated less recently
- Asks for fewer permissions (3 vs 5)
- Listed under Developer Tools
- 4
Similarweb - Website Traffic, AI Traffic & SEO Checker
Instant website analysis, AI traffic insights, and SEO metrics at your fingertips.
≈1M users4.6★ from 3.8K ratingsUpdated 13 days ago6 permissions- About 500× more users than UnderTheHood
- Updated more recently
- Asks for more permissions (6 vs 5)
- Listed under Developer Tools
- 5
WhatsTheWeb - Website Traffic Analysis/SEO Checker
Instant website insights: traffic, SEO, AdSense, and tech stack analysis.
244 users5.0★ from 1 ratingUpdated 3 months ago5 permissions- About 8.2× fewer users than UnderTheHood
- Listed under Workflow & Planning
- 6
Serpstat Website SEO Checker
Instantly check your website's SEO, analyze competitors and get advantage of powerful search analytics in one place.
≈30K users4.7★ from 192 ratingsNot updated for 2+ years4 permissions- About 15× more users than UnderTheHood
- Updated less recently
- Asks for fewer permissions (4 vs 5)
- Listed under Workflow & Planning
- 7
SEO Checker
Crawl any website and audit its SEO, AI readiness, speed, security and accessibility, with an AI summary of what to fix first.
≈8K users4.7★ from 14 ratingsUpdated 3 weeks ago4 permissions- About 4.0× more users than UnderTheHood
- Updated more recently
- Asks for fewer permissions (4 vs 5)
- 8
SEO Analysis & Website Review by WooRank
Instant SEO analysis and website reviews for SEO, mobile, usability and social media. The freshest data when and where you want it.
≈200K users3.9★ from 615 ratingsNot updated for 4+ years1 permissions- About 100× more users than UnderTheHood
- Updated less recently
- Asks for fewer permissions (1 vs 5)
- Listed under Developer Tools
- 9
Website Broken Link Checker
Broken Link Checker detects 404 links and finds dead links, ensuring better SEO, site health, and smooth user experience.
929 users4.9★ from 12 ratingsUpdated 6 months ago4 permissions- About 2.2× fewer users than UnderTheHood
- Updated less recently
- Asks for fewer permissions (4 vs 5)
- Listed under Developer Tools
- 10
Website Ranking and SEO Checker by Semalt
Semalt SEO Extension is a free SEO tool to track websites’ Google rankings and spot issues that keep you from attracting traffic.
≈10K users4.8★ from 219 ratingsUpdated 15 months ago198 permissions- About 5.0× more users than UnderTheHood
- Updated less recently
- Asks for more permissions (198 vs 5)
UnderTheHood alternatives: questions
What is the best alternative to UnderTheHood?
By users, the most popular alternative is Similarweb - Website Traffic, AI Traffic & SEO Checker with ≈1M users and a 4.6-star rating. The closest match by what it does is Weblyzer - Website Technology Detector.
Which UnderTheHood alternative has the best rating?
Analysis SEO & Website Checker - PR-CY has the highest rating of these alternatives with 50+ ratings: 4.9 out of 5 from 571 ratings.
Is there a UnderTheHood alternative that asks for fewer permissions?
SEO Analysis & Website Review by WooRank asks for 1 permissions, against 5 for UnderTheHood.
How many alternatives to UnderTheHood are there?
We list 10 close alternatives to UnderTheHood on the Chrome Web Store, picked by what they do and ranked by how close they are.
Users and ratings are the figures shown on the Chrome Web Store, re-checked continuously. Alternatives are matched on name, description, category and topic. Browse best-of lists by niche.