KLA advised Enter, a Brazilian startup that applies artificial intelligence to large-scale corporate litigation, on its Series B round, which raised over US$100 million and increased the company’s valuation to US$1.2 billion—representing approximately a threefold increase compared to its Series A completed in 2025. As a result, Enter became the first artificial intelligence company in Latin America to reach unicorn status.
Founded in 2023, Enter develops AI-driven solutions to automate the management of high-volume litigation, particularly in consumer and labor matters. Its technology operates across multiple stages of the litigation process, from supporting the drafting of legal documents—subject to client lawyers’ review—to data analysis and decision-making support, enabling greater efficiency and cost reduction for companies handling large caseloads.
Currently, the company serves more than 45 clients, including banks and airlines, and already manages over 300,000 cases annually. Since its Series A in April 2025, Enter has tripled its client base, increased its revenue more than tenfold, and expanded the volume of cases handled by EnterOS to over 300,000 per year.
The company was founded by Mateus Costa-Ribeiro, a Brazilian who entered law school at 14, won a case before Brazil’s Supreme Federal Court at 18, and became the youngest person in the world to complete a master’s degree at Harvard Law School. Mateus received a full scholarship from Google’s global president to pursue an MBA at Stanford, where he studied for one semester before leaving to found Enter.
Mateus founded the company alongside Michael Mac-Vicar—co-founder and former CTO of Wildlife Studios, valued at US$3 billion, and the first CTO in Brazil to co-found two unicorns—and Henrique Vaz, a Harvard Computer Science graduate, 20-time medalist in Mathematics and Computer Science Olympiads, and former CMO of Wildlife.
Enter plans to invest the proceeds in two main areas: talent and product. The goal is to fulfill its original mission of building, from Brazil, a cutting-edge artificial intelligence company with global standards, capable of competing with leading players worldwide.
The transaction was advised by the law firms Greenberg Traurig and KLA Advogados, representing Enter, and Gunderson Dettmer and Veirano, representing Founders Fund, the lead investor in the round, which also included participation from Ribbit Capital, Sequoia Capital, ONEVC, Atlantico, and Kaszek.
Enter’s in-house legal team was coordinated by Arthur Dalmarco (CLO) and Geovana Guimarães (Legal Manager), who were directly involved in leading the transaction.
