Brazil has a big legal problem. There are nearly 80 million active lawsuits in its courts right now. That is eight times the US total. Civil cases can take five to ten years to close. And the cost to Brazil’s economy runs into billions of dollars every year. For the first time, a tech startup is taking this problem on at scale. Enter is the Brazil legal AI startup that top Silicon Valley investors are backing.
It uses AI to help large firms manage, fight, and settle mass cases. And it does so faster and at far lower cost. In September 2025, Enter raised a $35 million Series A from Founders Fund and Sequoia Capital. That round valued it at $350 million.
Then, just eight months later, it raised a $100 million Series B. Its valuation jumped to $1.2 billion. Enter, the Brazil legal AI startup, is now a unicorn and one of the most exciting startup stories in Latin America.
So how did a young founder turn Brazil’s biggest legal nightmare into a billion-dollar AI company? Let us find out.
Why Brazil’s Legal System Is in Crisis
To understand Enter, you first need to know the scale of Brazil’s legal problem.
Brazil has around 80 million active lawsuits at any time. That is almost one case per three people. In 2024 alone, lawyers filed over 39 million new cases. That was a 46% jump since 2020.
Why so many cases? Digital filings in Brazil are free of charge. So people can easily sue banks, airlines, and shops for issues that customer service would resolve in other countries. As a result, the courts are completely swamped with cases.
Civil cases take five to ten years to settle. Labor cases drag on for one to two years. Brazil also has one of the world’s highest lawyer-to-person ratios. However, the courts are still unable to keep up.
The Cost to Big Companies
For big firms, this creates a heavy burden. A big bank like Itaú or Santander may face hundreds of thousands of active lawsuits at once. Handling this volume is slow and very costly.
Each case needs document review. Each needs legal drafts. And each needs court follow-up. On top of that, adverse case reviews lead to poor choices at deal time. Fraud goes undetected. Legal staff spends hours on tasks that should take minutes.
This scenario is where AI can truly help. AI tools like Enter take over the most routine legal tasks. This approach cuts costs. It raises win rates. And it gives legal teams better data.
A Complex but Valuable Market
Brazil’s courts follow civil law rules. These draw from French and German legal codes. Cases are filed in many types of courts—federal, state, labor, consumer, and tax courts. Each one has its own rules and processes. All of these cases are conducted in precise legal Portuguese.
Such complexity makes the problem very difficult to solve. But it also makes the reward enormous. If Enter’s AI can work in Brazil, it can work anywhere in the world.
Meet Enter: The Brazil Legal AI Startup Changing Mass Litigation
Enter was founded in São Paulo in 2023. The three co-founders are Mateus Costa-Ribeiro, Michael Mac-Vicar, and Henrique Vaz. Their story is worth knowing.
Mateus became Brazil’s youngest practicing lawyer at just 18. He then studied law at Harvard. He passed the New York Bar at 20. Later, he left a full Stanford MBA scholarship to build Enter. He had seen Brazil’s legal crisis firsthand. So he knew what needed to change.
“We have built a platform that delivers real cost savings for the largest companies in Latin America,” said Mateus. “Solving this in Brazil proves our tech can scale globally.”
Michael MacVicar was the chief technology officer at Wildlife Studios, one of Brazil’s biggest gaming firms. Henrique Vaz led product at Wildlife after starting as an intern. Together, the team had one clear goal: use AI agents to automate company lawsuit management.
What Enter’s Platform Does
Enter links directly to Brazil’s courts via API. It also connects to a company’s legal software and internal files. Once set up, it gives legal teams a live view of all their cases at once.
The platform’s AI agents take on tasks that used to eat up hours of manual work:
- Sorting new lawsuits by type, risk level, and likely result.
- Spotting fraud, such as fake documents or suspicious claim patterns.
- Drafting legal defenses based on past cases and court records.
- Recommending deal amounts based on data and previous outcomes.
- Tracking court updates and sending alerts about new rulings.
- Assessing appeal chances, so teams know when to fight and when to settle.
Moreover, the platform finds data that companies never had access to before. It scans thousands of internal documents and spots patterns in claim types and causes. So companies can act early and resolve the root problems that create lawsuits.
In 2025, Enter handled over 250,000 new cases. That is nearly double the total filed each year across all of Japan.
The Funding Story: Why Sequoia and Founders Fund Backed Enter
Enter’s funding story shows just how big this chance is.
In September 2025, Founders Fund and Sequoia Capital co-led Enter’s $35 million Series A. This was the biggest investment ever in a native AI company in Latin America at the time. It was also Sequoia’s first bet on a Brazilian company since it backed Nubank over ten years ago.
“Enter has the potential to be a global leader in legal AI,” said Matias Van Thienen, a partner at Founders Fund. “Excess lawsuits are a bigger problem in Brazil than anywhere else on earth.”
Then, in May 2026, Enter raised a $100 million Series B. Founders Fund led again. Sequoia, Ribbit Capital, ONEVC, Atlantico, and Kaszek also joined. As a result, Enter hit a valuation of $1.2 billion in under eight months. That put it among the top AI firms in Latin America.
What Is Driving This Growth?
The fast valuation jump shows that Enter’s revenue is growing quickly. The client list tells the same story.
Enter works with Itaú, Brazil’s largest private bank. It also serves Santander, Nubank, Mercado Livre, Airbnb, LATAM Airlines, and iFood. These are not small pilots. These are full company deals that generate real income. Clients spend around R$4 million per year on the platform. Once Enter is integrated into a company’s legal workflow, it becomes very difficult for that company to disengage from the platform.
Enter’s Data Edge: Why Rivals Cannot Catch Up Quickly
Many AI startups say they have a strong edge over rivals. Enter truly does for a concrete reason.
Every case on Enter’s platform creates labeled data. The system records the claim type, the defense drafted, whether the deal was accepted, and the court’s final decision. Enter handles 250,000 new cases per year. As a result, it is building a dataset of Brazilian lawsuits’ outcomes that no new rival can copy quickly.
This dataset gets stronger over time. The more cases it enters, the more hands it gets, the smarter its models become. And the smarter its tools, the more value it gives clients. That pulls in even more data. This loop is powerful and difficult to break.
Enter OS: A Full Legal Operating System
Enter is now building the Enter OS. It is a full OS for companies dealing with mass lawsuits. Unlike the earlier product, Enter OS manages a case from start to finish. This encompasses everything from the initial filing to the final ruling or settlement.
It covers fraud detection, live court tracking, appeal reviews, and smart deal advice, all in one place. Early results are strong. Clients have seen win rates rise by 6 percentage points on cases run through the platform. They also adopted it 2.5 times faster than they first planned.
Enter’s Global Vision
Enter’s story has a clear lesson. The right market builds the right product.
Brazil’s legal challenge forced Enter to build a stronger tool than any simpler market would have needed. One company client put it simply: “Brazil holds 98% of LATAM’s global lawsuits.” “Enter lets us raise legal quality across the region and cut costs at the same time.”
This principle applies far beyond Brazil. Every large economy has companies buried in lawsuit costs. The US, India, the EU, and Southeast Asia all face versions of this problem. Enter’s AI was built for the world’s hardest legal market. It is now ready to move into new markets and languages.
Enter plans to grow across Latin America first. Then it will go global. Meanwhile, rivals like Harvey (US, valued at ~$3 billion) and Legora (Europe) show that the sector will be a huge global market. Enter is building toward the same goal. But its depth of data and market leadership are difficult to match.
A New Category Is Born in LATAM
Enter, the Brazil legal AI startup, did not simply create a product; it established a new market. It made a new market. Before Enter, large Brazilian firms had no scalable AI tool for mass lawsuits. Now they do. Results are clear: higher win rates, lower costs, faster case outcomes, and a full, clear view into legal risk.
Enter has also shown that Brazil can lead in vertical AI. As Mateus said, “AI is the greatest revolution of our generation. Our mission is to make Brazil a key player in that story. They are already making significant progress.
Conclusion
Brazil’s legal system has been broken for decades. Enter is not fixing it overnight. However, for the companies facing the largest burdens from lawsuits, Enter’s solutions are effective. Enter delivers speed, lower costs, and smart AI tools at scale.
In under three years, Enter has grown from a small São Paulo startup to a $1.2 billion AI unicorn. Founders Fund, Sequoia, and Ribbit Capital back it. It handles over 250,000 cases per year. Its clients include Brazil’s biggest banks, retailers, and global tech firms. And it is building a data edge that rivals will find impossible to close.
The Brazil legal AI startup has proved that vertical AI works, even in the world’s hardest legal market. That is why all founders, investors, and business leaders should watch Enter. Not all the big AI wins will come from Silicon Valley. Many will come from broken, complex markets, where one team decided to step in.
Want to follow Enter’s journey? Visit getenter.ai and see how Brazil is helping shape the future of legal AI.
