Home / Compare / Best website technology lookup tools in 2026
Best website technology lookup tools in 2026
Eleven website technology lookup tools compared on what each one shows before payment and what a result actually is: one site's stack, a list of sites, or a share of a stated set. Competitor figures were read from each provider's own public pages on 3 September 2026.
The order follows how much each tool shows before payment.
The table
| Provider | Single site lookup | Share with base printed | History | Free to read and cite | Price stated |
|---|---|---|---|---|---|
| Installmap | No. The published counts are aggregate | Yes. Every count prints its crawled base | No. One crawl date a group | Yes. A citation line on every page | Free to read |
| BuiltWith | Free, stated as free forever | No. 491.9M domains stated as scale, no sample | 18 years, back to January 1985 | check | $295, $495, $995 a month |
| StackShare | Free company stack profiles | No. Stacks are submitted, not crawled | check | check | None. The pricing page returns 404 |
| Enlyft | check | A share is printed, the base is not | 9 years 2 months, per the CloudStack page | check | None published anywhere on the site |
| TheirStack | check | Count only. A total, no base share | check | check | $109 per 1,000 credits, API $49 a month |
| NerdyData | One domain stack lookup stated | No. A result count before purchase | check | Free reports for publishing researchers, by email | $200, $300, $1,000 a month |
| PublicWWW | Snippet search, top 1,000,000 unregistered | No. A page count for a snippet | check | check | $0, $109, $199, $499 a month |
| Wappalyzer | 50 free lookups a month, then metered | No | check | check | $250, $450, $850 and up a month |
| Datanyze | check | No | check | check | $0 trial, $29 and $55 a month |
| SimilarTech | Stated as a capability, no caps published | No | 10 years stated | check | None. The pricing page returns 404 |
| HG Insights | No self serve lookup | No | check | check | Not published. Quote, two year contract |
"check" means the provider does not state it on the pages read, so nothing is filled in for them.
1. Installmap
Installmap answers one of the two lookup questions: which sites run a named tool, and how many. It does not answer the other one, what a single named site runs, because the published counts are aggregate and no per company row is published.
A tool page reads as a count out of a stated base rather than as a number on its own. PostHog is on 12.8% of the 5,386 crawled Y Combinator companies (688 domains); OneTrust is on 44.9% of the 472 crawled Fortune 500 companies (212 domains). Every page carries the crawl date and a citation line, and no account stands between a reader and either number. Detection runs 448 fingerprints over 26 categories, and the method page states what a rendered crawl catches that a plain fetch does not, 35.8% on the Inc 5000.
2. BuiltWith
BuiltWith is the tool most people mean by a website technology lookup. Type a domain and it returns what that site runs, and individual site lookups are stated as free forever. It also holds the deepest history here: 18 years, with adoption records back to January 1985.
The other direction costs money. Asking which sites run a technology returns trend data and top site listings free, and the company lists behind them start at $295 a month, capped at two technologies until $495. A result is a detection on one page, and no sample, denominator or failure count is published, so the counts cannot be read as a share of a defined set.
Installmap vs BuiltWith · builtwith.com
3. StackShare
StackShare answers the one site question without a login: Uber's profile lists 59 tools, Airbnb 55 and Facebook 36, with pros, cons and alternatives on each tool page.
The profiles are submitted by companies and developers rather than detected, so a stack here is a claim on a date nobody states, not a fingerprint match on a page loaded today. The React page shows 183,297 stack additions while the companies and developers entries under it rendered no names and the adoption page rendered no content, so the depth is uneven from tool to tool. stackshare.io/pricing returns 404, so what anything beyond free reading costs could not be read.
Installmap vs StackShare · stackshare.io
4. Enlyft
Enlyft answers the other direction free. A product page such as CloudStack states a company count, 201, a market share figure, and breakdowns by industry, country, employee size and revenue, with usage data stated as going back 9 years and 2 months.
Five companies are named and the rest route to a get the list action with no list size published, so the free page gives a shape rather than the members. The share has no stated base under it: no sample definition, no failure count, no crawl date.
Installmap vs Enlyft · enlyft.com
5. TheirStack
TheirStack publishes a technology page per tool with a total company count, 228,936 on the HubSpot page, ten rows of it and a country and region breakdown, all before any payment.
Rows eleven onward cost a credit each, at $109 for 1,000 credits, and a revealed company stays viewable for 90 days. No method sits behind the total: nothing states which companies were checked, how, or when. Industry and employee size appear on the company rows rather than as a published cut.
Installmap vs TheirStack · theirstack.com
6. NerdyData
NerdyData lets you build a report and see its total result count with a sample of the websites before buying, and states a one domain stack lookup as well. Its FAQ says there is no separate free trial and that the preview is exactly this: the count before the rows.
How many rows a free account unlocks is published twice and differently, 100 per report on the pricing page and 500 on the homepage. Paid rows start at $200 a month for 5,000 a download.
Installmap vs NerdyData · nerdydata.com
7. PublicWWW
PublicWWW is a lookup over source code rather than over detected products. Search for a script host, a tracking id or any other snippet and it returns the pages carrying it. Unregistered search covers websites in the top 1,000,000 and the free tier opens the top 3M, with downloads stopping at 20 rows.
The result is a page count, not a share of a stated set of companies, and two snippets for the same vendor return two different numbers. Paid tiers run $109, $199 and $499 a month for more searches a day and more rows. The homepage states 514,190,657 pages indexed as of 30 August 2026.
Installmap vs PublicWWW · publicwww.com
8. Wappalyzer
Wappalyzer gives 50 lookups and email verifications a month free, plus 5 website alerts and sample lead lists. A lookup returns the technologies behind a site along with company details and contact data.
After that it is $250 a month for one user, two lead list technology targets and 5,000 lookups, rising to $850 and up. Credits included in a plan expire after 60 days and bundles after 365. Nothing on the site publishes a market share count or an industry or size cut, so the free lookups answer what one site runs and not how common anything is. The lead lists page returned a browser error to automated fetching on 3 September 2026.
Installmap vs Wappalyzer · wappalyzer.com
9. Datanyze
Datanyze offers a 90 day Nyze Lite trial at 10 credits a month, then $29 or $55 a month for 80 or 160. A credit is one contact information reveal through the Chrome extension or the directory pages.
The reveal is a person's email address or phone number, not a site's technology stack. Nothing on the pages read describes technology detection or publishes a technology count, so it does not answer either lookup question. The FAQ states that Lite users lose access to details they had already revealed when the trial ends.
Installmap vs Datanyze · datanyze.com
10. SimilarTech
SimilarTech lists free tools in its navigation, and every link points at similarweb.com. A full breakdown of one company's website technologies and search for companies by the technology they use are both stated as capabilities, with no caps published.
What could be read from the domain itself stops there. similartech.com/pricing returns HTTP 404 and www.similartech.com does not resolve in DNS, so no price, no free tier and no export term is stated. The solution pages state scale instead: 100M+ websites, 20M+ companies and 10 years of historical data.
Installmap vs SimilarTech · similartech.com
11. HG Insights
HG Insights has no free lookup. Its pricing page states that no pilot and no free trial plan is currently available, and access runs through a demo request or a conversation with sales.
That puts it last on a page about what can be checked before paying: no self serve lookup, no published count, no breakdown and no price. The homepage states that RGI Fabric covers 40M+ companies with firmographic, technographic and spend data. The modules are bought separately on a standard two year contract.
Installmap vs HG Insights · hginsights.com