A BuiltWith alternative without the enterprise price tag
StackSherlock is a BuiltWith alternative for people who want the technology behind a domain without an enterprise contract. You get lookups, reverse search (who-uses-X), and CSV exports through a clean API and a free directory, refreshed daily, at about half what BuiltWith charges. BuiltWith still wins on one thing: years of historical data. We are early, and we say so plainly.
If you are shopping for a BuiltWith alternative, you probably hit one of two walls: the price, or the fact that the API and bulk features sit behind the higher tiers. StackSherlock covers the same core job, finding what a website is built with, with simpler pricing and a developer-first API on every plan.
What StackSherlock does
- Look up any domain and get its full stack, grouped by category.
- Reverse lookup: every site running a given technology, for building prospect lists.
- A REST API with Python and TypeScript SDKs, included from the first paid plan.
- CSV and JSON exports for lists and bulk lookups.
- Detection evidence on every result, so you can see why a tool was flagged.
- A daily refresh from continuous crawling.
StackSherlock vs BuiltWith, honestly
| StackSherlock | BuiltWith | |
|---|---|---|
| Domain lookups | Yes | Yes |
| Reverse lookup (who-uses-X) | Yes, every plan | Yes, higher tiers |
| REST API | Yes, from the entry plan | Yes, paid add-on |
| CSV / JSON export | Yes | Yes |
| Historical data | Not yet (we are early) | Yes, many years |
| Catalog size | Growing, refreshed daily | 100,000+ technologies |
| Entry price | About half | Higher |
Where BuiltWith is still the better choice
BuiltWith has been collecting since around 2008, so if your work depends on a technology's history, who used it three years ago, when a site switched platforms, that is their strength and we cannot match it yet. Their catalog is also wider: they track well over 100,000 technologies. If you need the deepest catalog or a long lookback, BuiltWith earns its price.
Where StackSherlock fits
If you want current data, a clean API, reverse lookups on every plan, and a bill that does not need sign-off, that is the gap we are built for. Most teams checking stacks for sales, research, or competitive work need what a site runs now, not what it ran in 2019.
You can browse the directory free, read the API docs, or check pricing to see the difference for yourself.
See the stack behind any domain, free.
Open the directoryFAQ
Is StackSherlock a free BuiltWith alternative?
The directory is free to browse, and you can look up domains without an account. The API, bulk lookups, and exports are on paid plans, which start at about half of comparable BuiltWith tiers.
Does StackSherlock have historical technology data like BuiltWith?
Not yet. BuiltWith has years of history; we started recently and refresh daily, so our strength is current data, not lookback. We would rather say that than pretend otherwise.
Can I do reverse lookups to find who uses a technology?
Yes, on every plan. You can pull a list of every site running a given tool, which is the part most people want for building prospect lists.
How does the pricing compare?
Entry plans run about half of comparable BuiltWith tiers, and the API is included from the first paid plan rather than being a higher-tier add-on. See the pricing section for current numbers.