Best website technology lookup tools in 2026
Eleven website technology lookup tools compared on what can be read without an account. Each figure was read from the provider's own pages on 3 September 2026.
The order follows how much each tool shows before payment.
1. Installmap
A research site that publishes counts of the software detected on company websites, cut by industry, employee size band and country, with the crawl and its attrition funnel written up on the method page. Every count is readable without an account, with the crawled base it divides by and the failure counts on the method page.
2. BuiltWith
A website technology profiler that detects what a site runs and builds lists of sites by detected technology, keyword or spend. It also holds historical technology records and pushes lists into CRMs. Individual site lookups are free forever, but the list of sites running a technology is what the $295 plan meters, and no sample or failure count is published.
Installmap vs BuiltWith · builtwith.com
3. StackShare
A public directory of developer and AI tools plus company tech stack profiles that companies and developers submit. Each tool page carries a description, pros and cons, alternatives and an adoption tab. Company stack profiles are free to read, but they are submitted rather than detected, so no share and no sample sits behind them.
Installmap vs StackShare · stackshare.io
4. Enlyft
A B2B account intelligence platform for technology vendors and their channel partners. It scores accounts using technographic and other signals, and drafts outreach for a seller to review. Free product pages name five companies out of the stated total and route the rest to a demo request; no sample or method is published.
Installmap vs Enlyft · enlyft.com
5. TheirStack
A search product over job postings and company technographics. You search companies by the technologies they use and what they hire for, then reveal or export the matching companies. Public technology pages show 10 rows of a stated total and a country breakdown, the rest costs a credit each, and no method is published.
Installmap vs TheirStack · theirstack.com
6. NerdyData
A code search engine over live domains. You search the HTML, JavaScript, CSS, headers, cookies and XHR URLs of crawled sites to build lists of websites using a technology, and look up one domain's stack. A free account unlocks 100 rows per report, or 500 according to the homepage; the two published figures differ and no sample size is given.
Installmap vs NerdyData · nerdydata.com
7. PublicWWW
A source code search engine over indexed web pages. You search for any snippet, signature or keyword inside page HTML, JavaScript and CSS, and get the list of sites containing it. Unregistered search covers the top 1,000,000 sites and free downloads stop at 20 rows, and the result is a page count rather than a share of a stated sample.
Installmap vs PublicWWW · publicwww.com
8. Wappalyzer
A technology lookup service that reports the technologies, company details and contact data behind a website, and builds prospect lists filtered by technology, keyword, market position and geography. 50 free lookups a month and sample lead lists, then $250 a month, with no published count and no industry or size cut.
Installmap vs Wappalyzer · wappalyzer.com
9. Datanyze
A B2B contact data tool built around a Chrome extension that reveals email addresses and phone numbers from LinkedIn profiles and company websites, with contacts and companies tagged into lists. A 90 day trial at 10 credits a month, after which revealed details are lost unless you upgrade, and no technology count is published.
Installmap vs Datanyze · datanyze.com
10. SimilarTech
A web technology analysis site, branded SimilarTech, a Similarweb company. It offers company and website technology breakdowns, competitor comparison, search for companies by technology, and contact lists built from technology signals. Free tools are listed in the navigation but every link points at similarweb.com, and its own pricing page returns a 404.
Installmap vs SimilarTech · similartech.com
11. HG Insights
A B2B revenue intelligence platform combining firmographic, technographic, technology spend and buyer intent data with market sizing, account scoring and sales research modules. No free tier, no self-serve lookup and no trial, per its own pricing page, and no count is published.