A BuiltWith alternative for live technology lookups without a $295 monthly plan
BuiltWith is the deepest technology index there is, and its paid plans, from $295 a month, buy historical data, lead lists and relationship graphs that an API of ours does not try to replace. Individual site lookups are free on its website. The Tech Stack API answers the operational question, what is this site running right now, by fetching the page live and matching a curated ruleset of 108 technologies, for 10 tokens a call on the same plan as the rest of the catalog.
| What | BuiltWith | Tech Stack API |
|---|---|---|
| Free tier | Free individual site lookups on the website; an MCP API rate-limited to 1 request per second; Free API quota not stated (as published). | 500 tokens a month, no card; 10 tokens per lookup, so 50 free lookups. |
| Entry paid price | Basic $295/month, Pro $495, Team $995; minimum term one month (as published). | Starter $6.99 for 2,500 lookups a month; Pro $24.99 for 15,000. |
| How it works | An index crawled the way a search engine does; no third-party data (as published). | A curated, self-maintained fingerprint ruleset of 108 technologies, matched against one live fetch of the target page: response headers, cookies, script and stylesheet URLs, meta tags and HTML markers. |
| Authentication | KEY query parameter; an x402 USDC payment option needs no account (as published). | One API key, sent as the X-Api-Key header. The same key works for every API in the catalog. |
| Freshness | Index-based; cadence not stated on the pages read. | Inspected live on every call. The fingerprint ruleset is updated with each release. |
Facts about BuiltWith were read from its own pages on October 29, 2026. If something has changed since, tell us and we will update the page. Sources: BuiltWith plans, BuiltWith API.
Reasons to pick Tech Stack API
- Live, not indexed: the page is fetched when you ask, so a site that switched platforms yesterday shows the new stack today.
- A price that fits a sales tool or a CRM enrichment step rather than a research subscription.
- Evidence in the response: which header, cookie, script URL or markup matched, so you can trust or discard a detection.
- The Logos API on the same key to render the company mark beside the stack.
When BuiltWith is still the better choice
- You need historical technology changes, lead lists by technology, or coverage of thousands of niche technologies; BuiltWith's index is far broader than a 108-rule live check.
- You cannot fetch the target site live, for example behind authentication.
Try it with your key
The first endpoint of the API as a curl command. Create a free key and paste it in. (Detect Stack, 10 tokens).
curl "https://api-tech-stack.dataandapis.com/v1/stack/www.allbirds.com?url=https%3A%2F%2Fwww.allbirds.com%2Fproducts" \
-H "X-Api-Key: YOUR_API_KEY"Plans
Free 500 tokens a month · Starter $6.99 for 25,000 · Pro $24.99 for 150,000 · Ultra $99.99 for 1,000,000. Every plan covers every API.
Pairs well with: Logos API — Every icon a website publishes, scored and served as an image, from just the domain
Questions people ask
- How many technologies does it detect?
- A curated ruleset of 108 technologies covering CMS, frameworks, analytics, payments, CDN and hosting, updated with each release. Breadth is deliberately traded for live, explainable results.
- Does it crawl the whole site?
- No. One live fetch of the page you name, including its headers, cookies, script and stylesheet URLs, meta tags and HTML markers.
- Why 10 tokens?
- Each call fetches a third-party page live, which costs more than a database read, so it sits in the medium-cost band.
One key, 128 APIs, free to start
500 tokens a month without a card. Most calls cost one token.
Create a free account