28M pages, $0 in revenue: a lesson from CNPJ Go!, a Brazilian CNPJ lookup site

A person who spent 9 years running small-business lending at a Brazilian payments company used the government's free monthly company registry data to publish about 28M company pages in 4 months, at one point reaching a global rank of around 110k. The traffic is real, but the revenue flowing through its Stripe account is still $0. Meanwhile, a similar product charging only R$29 a month already has 38 paying subscribers. This piece explains how the traffic play was built, why the traffic never turned into money, and, if you want to copy it, where to shift and what to sell instead.

A former fintech product manager and a free national company list

In Mar 2026 16, João Vitor Penna Reis registered a small company in São Paulo with a share capital of R$1,000. His website's About page says he led small-business lending products "at one of Brazil's largest payments fintechs for over 9 years" (his Facebook suggests Stone). In Mar 27, CNPJ Go! (cnpjgo.com.br) went live.

The raw material is public. Each month Brazil's federal tax authority (Receita Federal) releases the registration records of over 60M companies as open data bulk files: company name, CNAE industry code, address, operating status, shareholders. The official lookup page has a captcha and requires one-by-one manual searches, so when Brazilians issue invoices, vet suppliers, or check partners, they search a CNPJ number and click through to a third-party lookup site.

In Apr 16, he posted on his blog that CNPJ Go! had passed review by dados.gov.br, Brazil's open government data portal, and been listed as a "data reuse" in the portal's showcase. The portal's note read: "Reúso homologado e disponibilizado na galeria do portal. Obrigado pela iniciativa." (Reuse approved and listed in the portal gallery. Thanks for the initiative.) A website three weeks old now had a government-domain backlink and an "officially recognized" stamp.

How the traffic was built: one page per company

Its sitemap has 557 shards, each with 50k company pages, roughly 28M pages in total, one per CNPJ number (like cnpjgo.com.br/cnpj/65704401000178). Each page is assembled from registry data: basic info, shareholder structure, a template-generated "about this company" paragraph, an explanation of the industry code, and links up to "state → city → industry" listing pages. The "state × industry" listings alone number 12,882 pages. Pages are pre-rendered and cached on Cloudflare for a year, so the marginal cost is close to zero.

On top of these pages, in late April he also published a few "Speedio alternatives", "Casa dos Dados alternatives", "Econodata alternatives" and "Brazil B2B lead-gen tool comparison" posts, aimed squarely at people already comparing options and ready to pay. He also set up profiles on directories like Capterra, G2, Crunchbase and f6s. His robots.txt is interesting too: it lets through the search crawlers from ChatGPT and Perplexity, and blocks training crawlers like Common Crawl, Google-Extended and ByteDance's. He wants to be cited by AI search, but not used as training data.

Beyond that, there is nothing: in 0 days on X, 90 posts mention it. Reddit, TikTok, Product Hunt, and the press have nothing. The Meta and Google ad libraries we can check show no ads it's running (not finding ads doesn't prove it ran none). Nearly all its traffic comes from Google.

Rankings: shot up, fell, climbed back

On the global traffic ranking (Tranco), its trajectory looks like this:

So "climbed from outside the chart to #30k in 290 days" is really a rebound, not new growth. It was higher in early August than it is now.

Two things need to be read together. First, it started falling in mid-August, which lines up with Google's August 18–21 spam update; it started recovering in October, matching another spam update from Sep 24 to Oct 8 (inferred, not confirmed by keyword ranking data). Second, the October rebound wasn't unique to it: cnpj.ws rose from #30k to #310k in 37 days, cnpjaberto.com.br, launched around the same time, rose from #530k to #120k, and informecadastral.com.br rose from #400k to #240k. The long-established cnpj.biz (around #19k) and Econodata (around #38k) barely moved. It looks more like Google reshuffled the entire "CNPJ lookup" category and newer sites were lifted together, not that CNPJ Go! did anything right on its own.

One thing doesn't add up: in Chrome real-user data, it actually moved up from the top 500k to the top 100k in September, the same month it dropped off the global ranking. Possibly 7, and part of the August ranking was bot traffic or DNS-type non-human traffic that later disappeared, while real human users kept growing slowly (inferred, unverified).

Timing-wise it also got a tailwind: from July, Brazil began issuing new CNPJ numbers with a mix of letters and digits, which triggered a wave of "how to look up new CNPJs" searches. That window came from outside; the site didn't create it.

Where the money is: R$224 a month for a lead tool, and no money received so far

Free lookup is just the entry point. The paid part is the Business tier: filter the national company database by 20 criteria such as industry, state, and size, or upload a list of CNPJ numbers; then choose data sources to "enrich" the leads: Google Search is mandatory, while Google Maps, Instagram, websites, and LinkedIn are optional, with each lead-source lookup costing 1 credits. You get back emails, phone numbers, social profiles, reviews, and estimated revenue; AI scores each lead 0 to 100; and it writes ready-to-send opening messages for email, WhatsApp, and phone calls, then drops leads into a built-in CRM pipeline.

Pricing is public (/planos, 11-07):

Extra seats cost R$97 a month, signup includes 50 free credits, and no card is required. Compared with the established sales-intelligence player Speedio (from R$719 to 1,149, demo required), it's cheaper, transparent, and self-serve. The conversion path is well designed.

The problem: it connected Stripe to TrustMRR (a public leaderboard that verifies revenue in real time through payment APIs). Its page as of Nov 7 shows historical revenue of $0 and 0 active online subscriptions. The "about $6,000 a month" figure online is an estimate from a traffic model and doesn't match the payment data. It's possible it collects money through Brazilian Pix or another payment account rather than this Stripe account (unverified), but what's publicly visible is zero.

Same traffic, someone else got paid

The control group is right next to it. CNPJ Aberto (cnpjaberto.com.br) launched 2026 in April, a month after it, and does almost the same thing: open data, one page per company, free lookups. The difference is what it sells: an API for developers, an MCP interface for AI agents, a data mirror on Hugging Face, and a Pro tier from R$29 per month. On TrustMRR, 11-07 it earns $220,38 in online subscriptions over the last 30 days; its global rank is 122k, also higher than CNPJ Go!.

$220 a month isn't big money, but it shows something: most people searching CNPJ numbers are accountants, finance staff, and everyday people issuing invoices, plus developers writing code, not sales managers who'll pay R$224 a month for B2B sales leads. Selling the searchers a small product for a few dozen reais (an API, bulk export, no captcha) works far better than pushing them into a SaaS built for sales teams.

Who it's competing with

The category in Brazil is already crowded:

• Established free lookup sites: cnpj.biz (around #19k globally, with more than ten times its traffic), Casa dos Dados (around #61k), CNPJá (around #67k, API-oriented), cnpj.ws (around #37k, climbing fastest this round).
• Free lookups bolted on by big players: Jusbrasil (around #1,300), Serasa (around #16k), where the free lookup is just a traffic funnel.
• Expensive sales intelligence: Speedio and Econodata, where you request a quote and talk to sales.
• A batch that showed up in 2026: LeadCNPJ, LeadJet, TAMZ, Dados Premium, ProspecData, Kaptto, prospectei... All position themselves as "CNPJ + AI enrichment + WhatsApp scripts," all write "alternative to Speedio" posts, and most don't even make the global top 1M.

Compared with this batch, CNPJ Go! has almost no differentiation. Its lead is that it started SEO earlier and covered more ground, plus the government endorsement. No press has written about it, and no one is copying it. Others simply thought of the same thing at the same time.

If it were you

One-line verdict: Don't go after this one in Brazil. What's worth taking is the playbook: "government-published company registry data → one page per entity → pre-rendering + CDN" can push a new domain into the 4k global rank range within 100 months. If you do it, pick a country that hasn't been saturated yet, and from day one sell the small things lookup users actually want to pay for.

Who it suits: people who can do programmatic SEO, handle tens of millions of rows of data, and write page templates that don't read like machine translation, roughly 1 to 2 people. Ideally you speak the language of a country that has opened its company registry but whose local lookup sites are still weak (Mexico, Colombia, Chile, Peru, Indonesia, and similar). First, search "company number + lookup" in that country and see how old and clunky the top three results are.

Who it doesn't suit: anyone planning another CNPJ lookup site or "CNPJ + AI leads" SaaS in Brazil (a dozen new and old players are already competing, and one Google update can knock you off the chart); anyone aiming at markets like UK Companies House or the US, which were saturated long ago; anyone who assumes traffic equals revenue and plans to sell R$200-level sales tools right away.

How to build it: first confirm that the company registry data can legally be used commercially in the target country and how often it gets updated. One page per entity, with things people can use right away on each page (status, address, shareholders, other companies in the same city and industry). Build list pages by state, city, and industry, and link them to each other. Prerender and serve from a CDN. Start charging with low-priced options: API by call or by month (benchmark: CNPJ Aberto's R$29 starting price), bulk export of lists, and bulk verification for accountants and finance teams. Put ads on the pages as a fallback. 2B lead enrichment only once a sales team actually asks for it.

How to get customers: Long-tail Google is the whole game. The first thing after launch: register "data reuse" on the country's government open-data portal. You get an official endorsement and backlinks for almost nothing. Then write "X alternative" and "how to look up number X" articles to catch high-intent search. List on directories (Capterra, G2). Allow AI search crawlers in robots. Don't count on social media: CNPJ Go! is 0 on X, Reddit and TikTok, yet still gets traffic anyway.

When is "before": There's no hard deadline. This is a "the earlier, the better; whoever fills the space first holds it" business. But every Google spam update reshuffles the field, and the thinner your template pages, the easier they get knocked down next time. Make each page's unique content thick before launch.

Signs you're reading this wrong: ① CNPJ Go!'s revenue on TrustMRR turns positive and keeps climbing over the next two or three months. That would mean the "free lookup → high-priced lead tool" path works, just slowly, and its full playbook is worth copying. ② The new Brazilian sites in this batch all drop out of the top 1M after the next Google update. That would mean these programmatic pages are being treated as spam, and it's just as dangerous in any other country. ③ In your chosen country, searches for "company registration number lookup" already show three or more fully built, fast sites up front. That market is already crowded.

Data and sources

• Site rank: daily Tranco position (07-30 to 11-05). Chrome real-user reports (CrUX), Brazil monthly buckets, as of 2026-09.
• Revenue: TrustMRR pages cnpj-go and cnpj-aberto, verified against the Stripe API, updated 11-07. "About $6,000 a month" is an estimate from MRRTrack's traffic model.
• Product, pricing, founder, sitemap, robots.txt: homepage, /planos, /sobre, /sitemap-index.xml, /robots.txt and the blog at cnpjgo.com.br (crawled 11-07). dados.gov.br/dados/reuso/128.
• Google spam updates: Google Search status page and SEO industry coverage. The link to rank swings is an inference.
• Alphanumeric CNPJ: Receita Federal website, G1 coverage (2026-07-01).
• Competitor pricing: each company's website and comparison pages (LeadJet, TAMZ, LeadCNPJ).