Locus product guide · Updated November 10, 2026

BuiltWith alternatives for tech stack data and APIs

The main BuiltWith alternatives are Wappalyzer (50 free lookups a month, paid from $250 a month), Sumble (500 free credits a month, Pro at $99), TheirStack (tech stacks read from job posts, API from $49 a month) and PredictLeads (technology, job and news signals, 100 free API calls a month). BuiltWith itself is free for single lookups and costs $295 to $995 a month for lead lists. Through Locus Pro, an agent can pay for BuiltWith’s domain lookup per call, with no plan. Prices checked November 10, 2026.

How do BuiltWith alternatives compare on data and price?

The tools find technology in two ways. BuiltWith and Wappalyzer detect it on websites. TheirStack and PredictLeads also infer it from job postings, which catches back-office tools a website never shows. Prices come from each vendor’s pricing page. Prices checked November 10, 2026.

How do BuiltWith alternatives compare on data and price?
Tool	Where the data comes from	Entry paid price	Free tier	Best at
BuiltWith	Website detection across 491.9 million domains and 128,301 technologies	Basic: $295 a month, limited to 2 technology reports	Single-site lookups on builtwith.com	Lists of every site using a technology, plus trend history
Wappalyzer	Website detection	Pro: $250 a month for 1 user and 5,000 technology lookups	50 technology lookups a month	Lead lists by technology. API credits and CRM enrichment start on Business at $450.
Sumble	Account intelligence with technology, job function and project filters	Pro: $99 a month for 9,900 credits	500 credits a month	Finding accounts and people by the tools and projects they work on
TheirStack	Job postings from career sites, applicant tracking systems and job boards	API: $49 a month for 1,500 credits. App: $109 for 1,000 company credits.	Free to start	Back-office and data tools that show up in hiring, not on websites
PredictLeads	Company signals, including technology detections, jobs and news	Per API call above the free tier, with a monthly minimum	100 API calls a month	Bulk API access, since one call can return up to 1,000 records

What does BuiltWith cost, and what are the limits?

BuiltWith sells three main plans: Basic at $295, Pro at $495 and Team at $995 a month. Yearly billing costs 10 months’ price. Basic covers 2 technology reports and 1 login. Pro makes reports unlimited. Team adds unlimited Pro logins. The minimum term is 1 month on monthly plans and 1 year on yearly plans.

Plans are built for lead lists, trends and CRM sync. For one-off checks, the free lookup on builtwith.com is enough. BuiltWith also sells API access through api.builtwith.com.

When are job-post signals better than website detection?

Website detection sees what loads in a browser: analytics tags, CMS, payment widgets and the like. It misses tools that run behind the login, such as data warehouses or CRMs. Job posts often name those tools.

TheirStack sells two credit types. A company credit reveals one company’s jobs, technologies and firmographics in its app, and you can re-open it free for 90 days. API credits cost 1 per job and 3 per company or technographic lookup. Unused paid credits roll over for 12 months.

PredictLeads charges per request, not per record. One call to its technology detections endpoint can return up to 1,000 records for 1 credit, and the rate per call falls as volume grows.

Which technology lookups can an agent call through Locus Pro?

An agent can call BuiltWith and several other sources per lookup from one prepaid balance, with no plan and no provider key. Searching the catalog and reading prices are free. Each endpoint has a fixed price per call that the agent sees before it calls. The table lists endpoints in the Locus catalog on November 10, 2026.

PredictLeads, Tomba and Findymail endpoints are listed by their sellers on an open marketplace. Locus has not reviewed them and cannot promise they stay available.

Which technology lookups can an agent call through Locus Pro?
Locus endpoint	What it returns	Review status
BuiltWith domain lookup	Full tech profile with spend, social links and detection dates	Reviewed by Locus
BuiltWith summary	Counts of technology groups and categories	Reviewed by Locus
Hunter company enrichment	Company data for a domain, including its tech stack	Reviewed by Locus
Apollo organization enrichment	Industry, size, funding, revenue and tech stack	Reviewed by Locus
PredictLeads technology detections	Technologies detected for one company	Seller listing, not reviewed
Tomba technology	Technologies used by a website	Seller listing, not reviewed

Browse the tool catalog

How do I choose a BuiltWith alternative?

Start from the question you ask.

Which sites use a given technology? BuiltWith or Wappalyzer lists.
What does this one company run, including internal tools? TheirStack or PredictLeads.
Which accounts and people work on a technology or project? Sumble.
What is the stack of each new lead, checked by an agent? A per-call lookup through Locus Pro.
Thousands of domains a day? Buy a plan. At that volume, BuiltWith can cost less per lookup with your own BuiltWith account and API key.

Frequently asked questions

Is there a free BuiltWith alternative?

Wappalyzer gives 50 technology lookups a month on a free account. Sumble gives 500 credits a month. PredictLeads gives 100 API calls a month. BuiltWith’s own single-site lookup is also free.

Which BuiltWith alternative is best for API access?

PredictLeads, if you need many records, because one call returns up to 1,000 of them. TheirStack sells API credits on a plan separate from its app. For single domains with no plan, an agent can call BuiltWith per lookup through Locus Pro.

Why do technology tools disagree about a site?

They use different sources and refresh on different schedules. Website detection misses tools behind a login. Job-post inference can name tools a company is only hiring for. Check two sources for important accounts.

Implementation references

Use these first-party references for current request contracts and account requirements. Tool availability, prices, and negotiated terms can change.

Sources

Third-party details were checked on November 10, 2026. Vendors change pricing and features often, so confirm on their site before you decide.