StackScope vs BuiltWith
Both tell you what websites are built with. BuiltWith covers the installed base of the whole web. StackScope covers the sites that went live this week. Which one you need depends on the job.
What you can do with each
StackScope sends you new businesses as their sites go live, with what each one is built with. Filter by technology, keyword, category or country, and get the matches by webhook, Slack, or a daily or weekly email.
Watch a technology. A watch on WordPress sites in the UK delivers each new one as it lands. Published contact details are included on Pro and above.
Watch a keyword. A watch on the word "payroll", or on a competitor's name, does the same for every new site whose name, title or description contains it, whatever it is built with.
StackScope captures a launch-time snapshot and does not track later stack changes. Each site's stack is analysed once, when we first observe it, in a real browser.
BuiltWith answers questions about sites that already exist: which of hundreds of millions of domains run a technology, what a given site ran years ago, and when a known site adds or drops a tool. Its lead lists, Trends reports and Change API are built for the installed base.
What a watch delivers
Example: a watch on WordPress sites in the UK. These are the newest sites that matched, with the category StackScope assigned where it is confident enough to show one. Each date says what it is: the day we first saw a discovered site live, or the day a site was posted to a launch community.
- Sheffield United Kit | Football Shirt & Shoes For FansE-commerce First seen live
- Aquary – One beautiful diary for your whole fish room. First seen live
- Arts|Craft Adhesives & Glues|Leather Cord & Lacing-Special Offers with Free Delivery | companyreviveE-commerce First seen live
- Sports|Diving & Snorkeling|Team Sports-Sale Ends Soon | womersleywatersports.co.uk First seen live
- SusyBLifestyle – Fashion & Beauty, Lifestyle & Wellness, Food, Travel First seen live
- Auto|Headlight Switches|Filters-Save Up to 50% Right Now | hempseedcompany First seen live
Sites first observed with WordPress in the UK in the last 30 days: 8,369. That watch would have delivered each of them as it landed, by webhook, Slack or a daily email, up to your plan's allowance. The watch form shows this count for any combination of filters before you save it.
Explore recent WordPress sites → or browse everything that went live recently →
Set up a watch, from £15 a month
Side by side
| BuiltWith | StackScope | |
|---|---|---|
| Best for | The installed base: every site running a technology, and its history. | New sites: what went live this week, filtered by technology, keyword, category and country, delivered as it lands. |
| Where sites come from | Indexes the web the way a search engine does. A Live Feed channel reports domains new to its pipeline. | Mostly our own discovery pipeline, from public internet infrastructure: the launch date is the day a real site first answered on a new domain. Launch communities such as Hacker News and PeerPush add the rest, dated by their posting. |
| Filtering | Technology, keyword and country lists, retail reports, and natural-language list lookups through the Ask API. | Technology (any of, all of, excluding), keyword, category, country, launch type and contact availability, combined in one watch or one export. |
| Alerts | Technology Live Feed API (March 2026): WebSocket channels per technology, 2 per key on Basic, 50 on Pro, plus a channel for new domains. | Stackdar watches on a technology, a keyword, or both, delivered by webhook, Slack, or a daily or weekly email with a CSV. A keyword is a whole word in the site's name, title or description, and the alert says which word matched. The form shows what a watch would have sent over the last 30 days before you save it. |
| Access | Web app, Excel and CSV exports, a set of APIs, an MCP API, and CRM integrations for Salesforce, HubSpot, Pardot, Zoho, Close.io and Dynamics 365. | API, MCP server for Claude, ChatGPT, Cursor and Claude Code, CSV export and a no-code spreadsheet download, on every plan. Delivery by webhook and Slack. No native CRM connector. |
| Price | Basic $295 a month for 2 technologies, Pro $495 with unlimited technologies, Team $995 (builtwith.com/plans, September 2026, monthly billing; annual plans are listed at ten times the monthly price). Single lookups are free. | From £15 a month for 1 watch on 1 technology and 1 keyword, with lookups, exports and the MCP server. Published contact details and more watches from the Pro plan. No overage charges. Full grid. |
| Contact details | Contact information and business location data listed on every plan. | Role addresses and contact pages the site itself publishes. Never a named person. Pro and above. |
| Detection | Signals-based, against its own technology catalogue. | Our own fingerprint catalogue, not derived from Wappalyzer or any third-party database. Every page is rendered with JavaScript executed. Methodology. |
| Update cadence | "Billions more webpages from those websites updated weekly" (builtwith.com/plans, September 2026). No per-domain schedule is stated. | Once, when we first observe the site. Sites that came through a launch community also get a deeper crawl: screenshot, security headers, readiness and performance scores, green hosting, and a daily liveness check. |
| History | Technology history back to 2007 on Pro and above. | Launch-time snapshot only. |
Which one to pick
- StackScope, if you want the sites that went live this week or this month with a given technology, category or country, with contact routes, delivered as they land.
- StackScope with a keyword watch, if you want every new site that describes itself with a word, such as a niche ("photogrammetry"), a market ("payroll") or a competitor's name, whatever it is built with.
- StackScope's MCP server, if you want to ask an AI assistant "which WordPress sites went live in the UK this month" and get a list back.
- BuiltWith, if you want every site running a technology anywhere on the web, or to know when an existing site changes its stack.
- Either, to look up one site for free. BuiltWith looks up any domain. StackScope shows the sites already in its index, with what each shipped with.
Set up a watch, from £15 a month
StackScope is made by DATAFREAK LTD, a company registered in England and Wales. The data is held on our own servers in Europe and this site runs no analytics. Both of our crawlers identify themselves and respect robots.txt; details and opt-out are on the bot page. BuiltWith is a trademark of its owner and StackScope is not affiliated with BuiltWith. Competitor figures on this page were checked on 17 September 2026 against BuiltWith's public pages and will be re-checked. If one has changed, tell us at [email protected].