One Person, $14M a Year: Inside BuiltWith, the 19-Year-Old 'Lookup' Service
BuiltWith, which tells you what technology any website is built with, was started by Australia's Gary Brewer in 2007 and is widely reported to have reached over $14M (≈¥2.1B) in annual revenue with effectively one person. All traffic is organic — 2 million pageviews a month. A record that dramatically raised the revenue ceiling for a one-person business.
This is a translation of the Japanese original. The Japanese version and cited primary sources are authoritative for all figures.
Note: yen conversions in this article are rough estimates at ¥150/USD.
The Numbers First
| Item | Figure |
|---|---|
| Annual revenue | $14M (≈¥2.1B) — widely reported as of 2022. Recent estimates put it above $22M |
| Team | Founder Gary Brewer, effectively solo (a co-founder participated for a period early on) |
| Started | 2007. Built as a nights-only side project for 4 years while employed |
| Traffic | 2 million pageviews/month, all organic (zero advertising) |
What the Business Is
BuiltWith is a service where you enter a URL and it shows you the technologies that site uses (CMS, payments, analytics tools, and so on). Its free, effortless lookups made it a staple for developers and marketers, while the revenue comes from sales-prospecting use cases — meeting sales teams’ demand for things like “a list of every site running Shopify” with subscriptions of several hundred dollars a month.
Free practical tool for browsing, paid B2B lead-generation data. Distinct from both Photopea’s free + ads and PhotoAI’s charge-immediately model, this is a third model: using a free tool as the front door to a data asset.
Our Take
A mechanism as simple as “record every lookup” became, over 19 years, a data asset nobody can copy. BuiltWith’s moat isn’t technology — it’s the history of technology adoption across the entire web, accumulated since 2007. A latecomer starting today cannot collect the past. It is the data version of Photopea’s 7,000 hours — “time itself as the barrier to entry.”
Converting monetization to sales use cases is what set the order of magnitude of revenue. Developer curiosity (free) and sales budgets (expensive subscriptions) are two faces of the same data. Just redesigning whose budget pays can change the same product’s revenue a hundredfold.
The sequence — 4 years of nights-and-weekends, then going full-time — also matches the cases we’ve covered so far. Like Transistor’s “quit after it’s grown” and Radius’s 9 years alongside a day job, most one-person businesses that hit big went through a long parallel period first.
How Reproducible Is It?
- Easy to replicate: the structure of “accumulate data with a free practical tool, then sell that data at B2B prices” can be applied beyond technology detection — price histories, job listings, store data and more
- Limits: 19 years of first-mover advantage cannot be reproduced. Note also that the revenue and headcount figures are based on the founder’s public statements and multiple reports, not officially audited numbers
Further Reading
Sources
- Colin Keeley「The Story of BuiltWith: 1 Employee, $14m+ ARR」
- Starter Story「How Gary Brewer Stumbled Into A $14M Idea Profiling Websites」
This article summarizes and analyzes the public sources above. Please refer to the primary sources for details.