BuiltWith alternatives: 7 tech-detection options compared (2026)
BuiltWith is the incumbent for technology profiling - and most people shopping for an alternative were only using one slice of it. Seven options compared by what you were actually buying: lead lists, one-off lookups, an enrichment API, or hiring-based technographics.
Dvir Atias
Founder, JobsPipe
BuiltWith is the incumbent of technology profiling: it has crawled the web for the better part of two decades, tracks tens of thousands of technologies, and its lead-list business - “give me every site running Shopify Plus in Germany” - is the reference product for technology-based sales prospecting. It is genuinely good at coverage and history, and its pricing reflects it: the lead-list plans run hundreds of dollars a month, billed for the whole machine whether you need it or not.
That last part is why people search for alternatives. In our experience the searches split into four different buyers: teams that want lead lists, developers that want a lookup API for one domain at a time, people who just want a free one-off check, and sales teams that actually want to know what a company is adopting - which detection from a homepage can only partly answer. Be clear which one you are before you shortlist.
Disclosure up front: JobsPipe sells a tech-detection API (the Stack Scan endpoint), so we compete in exactly one of the four categories. For lead lists at BuiltWith scale we will point you elsewhere.
Which alternative fits what you were buying
| You were buying BuiltWith for | Closer-fit alternative |
|---|---|
| Lead lists by technology | HG Insights, SimilarTech, ZoomInfo (Datanyze) |
| Per-domain lookup API | JobsPipe Stack Scan, Wappalyzer API |
| Free one-off checks | WhatRuns, Netcraft site report, browser extensions |
| Self-hosted detection | Open-source Wappalyzer forks |
| What a company is adopting, not just serving | Hiring-based technographics (job postings) |
The options
Wappalyzer is the closest like-for-like: the same fingerprinting idea, sold as a browser extension, lookup tools and a metered API. It has its own trade-offs - the project went closed-source and the API is credit-priced - which we cover in a dedicated Wappalyzer alternatives comparison.
HG Insights, SimilarTech and Datanyze (ZoomInfo) are the lead-list competitors. If your actual product is a prospect list filtered by installed technology, these are the direct substitutes, priced for sales teams and sold as platforms. HG leans enterprise IT spend intelligence; SimilarTech leans web technologies; Datanyze now lives inside ZoomInfo's suite.
WhatRuns and Netcraft cover the free end. WhatRuns is a lightweight extension with a surprising hit rate on modern frameworks; Netcraft’s site report is the veteran for hosting, certificates and infrastructure detail on a single domain.
JobsPipe Stack Scan is the developer-shaped option: one POST with a domain returns the detected stack - frameworks, analytics, CDNs, payment and SaaS widgets - as JSON with confidence scores and category labels, scanned live and cached about two weeks. Self-serve key, free tier, metered per job like the rest of our API. It scans one domain per call: it is an enrichment primitive for your product or pipeline, not a lead-list factory.
The blind spot every homepage scanner shares
Detection - BuiltWith’s, Wappalyzer’s, ours - sees what a company serves on its public website. It cannot see the data warehouse, the internal tooling, or the platform migration that started last quarter. The public signal for those is hiring: job postings name the technologies a company is actually investing in, often before anything ships. That is a different data layer - technographics from job postings - and pairing a homepage scan with a company’s posting history (both of which JobsPipe exposes) answers the question sales teams are really asking: not “what is on their site” but “what are they betting on next”.
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Frequently Asked Questions
What is the best alternative to BuiltWith?
It depends on which part of BuiltWith you were using. For technology-filtered lead lists, HG Insights, SimilarTech and Datanyze (inside ZoomInfo) are the direct competitors. For a per-domain lookup API, JobsPipe Stack Scan and the Wappalyzer API are the developer-shaped options. For free one-off checks, WhatRuns and Netcraft's site report cover most needs, and open-source Wappalyzer forks handle self-hosted detection.
Is there a free alternative to BuiltWith?
For manual checks, yes: the WhatRuns browser extension and Netcraft's free site report handle single domains well, and open-source fingerprint libraries can be self-hosted without licence fees. For API access, free tiers rather than free products are the norm - JobsPipe's Stack Scan includes free monthly requests on the same key as its jobs API.
What can a technology-detection tool not see?
Anything not served on the public website: internal tooling, data warehouses, self-hosted software behind the firewall, and migrations in progress. The public signal for those is hiring - job postings name the technologies a company is investing in, often before anything ships. Pairing a homepage scan with a company's job-posting history covers both what is live today and what is being built next.
How does JobsPipe Stack Scan compare to BuiltWith?
Stack Scan is a per-domain enrichment API: one POST returns the detected technologies as JSON with categories and confidence scores, from a live scan cached about two weeks, on a self-serve key with a free tier. BuiltWith's strength is breadth and history - long-term tracking and lead lists across the whole web - at prices built for sales teams. For enriching domains inside your own product, the API shape wins; for buying prospect lists, BuiltWith's category wins.