Why people look for a Wappalyzer alternative
If you are searching for a Wappalyzer alternative, you are usually solving one specific problem, and I have run all of these tools against real domains to see which one solves it. The pattern that pushes people off Wappalyzer is consistent: the extension that used to be free and open got paywalled in 2023,1 the public ruleset went closed-source,2 and the API now sits behind a paid plan. For a developer or a data buyer who just wants to identify a stack and pipe it into something, that is friction with no upside.
So the question is rarely “what is the single best tech-detection tool.” It is “what gives me a free per-site lookup, and ideally an API, without a sales call.” That is the lens I used below. Start with the live scan at the top of this page - it is the JobsPipe answer to that exact question - then compare it against the rest.
Wappalyzer alternatives compared
| Tool | Free lookup | API | Detection | Best for |
|---|---|---|---|---|
 JobsPipeUs jobspipe.dev | Yes - free instant domain scan, no signup for first lookups | Yes - REST API, free tier on signup | 7,000+ technologies via live domain scan, plus a jobs + technographics join | Developers and data teams who want a free scan and a clean API |
 Wappalyzer wappalyzer.com | Extension still installs; useful web app and ruleset paywalled since 2023 | Yes - paid plans only | Closed ruleset; public detections drifted after closed-sourcing | Teams already standardized on the Wappalyzer extension |
 BuiltWith builtwith.com | Free single-site lookups; bulk and lists are paid | Limited; value lives in the paid web app | Very deep dataset with historical adoption back to 2008 | Sales teams needing lists of sites running a given tech |
 crft.studio crft.studio | Yes - free web tech-stack lookup tool | No public API | Browser-based per-site detection on common frameworks | One-off in-browser lookups with no account |
 WhatRuns whatruns.com | Yes - free browser extension, no signup | No | Around 1,000 detections; strong on fonts and CMS themes | A like-for-like swap for the free Wappalyzer extension |
 W3Techs w3techs.com | Yes - free per-site lookups and daily surveys | Yes - pay-as-you-go request packs | Top-1M sites; thin on long-tail per-site depth | Market-share research, not per-site profiling |
Detection counts describe technologies identified via a live domain scan, not a count of indexed websites. BuiltWith's historical adoption data goes back to 2008.3 Pricing and free-tier states reflect publicly listed plans as of June 2026.
The tools in detail
- Free instant tech-stack scan on any domain - paste a URL above and see the result in a couple of seconds, no extension, no account for the first lookups.
- Reads the live site directly - on stripe.com our scan flagged React, Cloudflare, Segment, and Stripe in about two seconds - then joins that signal with technographics from job postings, so you also see backend and data tools a page scan can never surface.
- Developer-friendly REST API with a free tier on signup, so the same detection that powers the web lookup drops straight into your own pipeline or CRM enrichment.
- Newer in the tech-detection category than Wappalyzer or BuiltWith, so the public brand recognition is smaller.
- No browser extension yet - the free scan runs on the web and via API, not as a click-the-toolbar popup.
- Historical adoption depth does not go back as far as BuiltWith's multi-year archive.
The pick if you want a genuinely free domain scan plus a clean API without the Wappalyzer paywall. Try the live lookup at the top of this page before you compare anything else.
- The reference point - most teams know the extension and the in-browser tech list it produces.
- Paid web app and API cover bulk lookups and lead lists once you are on a plan.
- Broad brand recognition makes it easy to standardize a team on a single tool.
- The useful surface moved behind a paywall in 2023, and the public ruleset went closed-source, so free detections have drifted on newer frameworks.
- The free extension still installs but stopped getting community contributions.
- API access is paid-only, which is the friction most people searching for a Wappalyzer alternative are trying to escape.
Still fine if your team is already standardized on it and paying. If you are here because the free tier got thin or the API is gated, the free scan above and a free API tier are the direct answer.
Scan Wappalyzer's own tech stack →- Deepest dataset in the category, with historical first-detected dates going back to 2008.
- Bulk site lists filtered by technology - the actual sales workflow Wappalyzer's paid tier targets.
- Free single-site lookups remain available without a login for ad-hoc checks.
- Bulk lookups, lists, and exports sit behind paid plans that start far above a hobby budget.
- No real free API; the value is concentrated in the paid web app.
- Long-tail detections can be stale, and revenue estimates deserve skepticism.
Pick BuiltWith when you need lists of sites running a given tech and historical adoption depth. For a free per-site scan with an API attached, JobsPipe is the lighter, cheaper starting point.
Scan BuiltWith's own tech stack →- Free web-based tech-stack lookup with no account required.
- Clean, fast per-site UI for one-off checks on common frameworks.
- Good fit when you just want to eyeball one URL and move on.
- No public API, so it does not fit into an automated pipeline.
- No bulk lookups or list building.
- Detection set is narrower than a full ruleset and skews toward popular frameworks.
A solid free single-site tool. The moment you need an API or a backend/data signal that a page scan misses, move up to JobsPipe.
Scan crft.studio's own tech stack →- Closest UX clone of the old free Wappalyzer extension - click the icon, see the stack.
- Genuinely free with no lookup limits and no signup gate.
- Strong on fonts, WordPress themes, and design-side tech.
- Around 1,000 detections - a smaller set than a full ruleset.
- No web app, no bulk scanner, no API - browser-only.
- Slower to add detections for new frameworks.
The right swap if you only ever used the free Wappalyzer extension in-browser. If you need an API or programmatic access, it is a dead end.
Scan WhatRuns's own tech stack →FAQ
What is the best free Wappalyzer alternative?+
For an in-browser, click-the-toolbar swap, WhatRuns is the closest free clone of the old Wappalyzer extension. If you want a free instant lookup that runs on any domain in the browser and also exposes a free API tier, JobsPipe is the better fit - paste a domain into the scan at the top of this page and you get the detected stack in a couple of seconds without an account.
Wappalyzer vs BuiltWith - which should I use?+
Wappalyzer is built around the per-site extension and a paid web app; BuiltWith is built around bulk site lists, historical adoption data, and sales prospecting. Use Wappalyzer for quick per-page detection, use BuiltWith when you need to pull lists of every site running a given technology. Both gate their best features behind paid plans, which is why a free scan with an attached API is a common third pick.
How accurate is tech-stack detection?+
Front-end detection (frameworks, analytics, CDN, payment, CMS) is reliable across tools because it reads markers in the page itself. Accuracy drops on backend, data, and infrastructure tools that never touch the public HTML - no page scanner can see Snowflake, Kubernetes, or an internal service from the front end. JobsPipe addresses that blind spot by joining the live domain scan with technographics pulled from job postings, which reveal team-side tools a page scan cannot.
Is there a Wappalyzer alternative with an API or CLI?+
Yes. Wappalyzer's own API is paid-only. JobsPipe offers a REST API with a free tier on signup, so the same detection behind the web lookup is available programmatically for enrichment, monitoring, or research. For a self-hosted CLI route, the maintained open-source forks of the pre-2023 Wappalyzer codebase run locally with no rate limits, but you operate the infrastructure yourself.
How many technologies can JobsPipe detect?+
JobsPipe detects 7,000+ technologies from a live domain scan - frontend frameworks, analytics, CDN, payment, marketing, and SaaS tools running on the public site - and layers on a jobs + technographics join that surfaces backend and data tooling a page scan alone would miss.
References
- Wappalyzer's shift to paid plans, announced in 2023: wappalyzer.com/pricing
- Wappalyzer's technology-detection ruleset is no longer published under an open license: github.com/enthec/webappanalyzer tracks the community fork of the last open ruleset.
- BuiltWith states it has tracked technology adoption since 2008: builtwith.com/about
Related reading
BuiltWith alternatives
Enterprise tech-intel, paid replacements, and the hiring-signal wildcard.
Technographics, explained
What technographic data is, where it comes from, and how to use it.
Tech-stack lookup
Scan any domain and see the technologies running on its public site.
All tool comparisons
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