Enter: 10 Key Things You Must Know

Overview

Enter is an innovative Brazilian startup that leverages artificial intelligence (AI) to transform the management of mass litigation for large enterprises. Founded in 2023, it addresses the enormous volume and complexity of legal disputes in Brazil, a country burdened with nearly 80 million active lawsuits—one of the highest figures worldwide. By applying cutting-edge AI technology, Enter helps businesses automate and optimize their legal processes, improving win rates and reducing costs. With backing from major Silicon Valley investors and partnerships with leading companies across Latin America, Enter is rapidly emerging as a pioneer in legal tech. This article explores 10 fascinating and essential facts about Enter, uncovering its origins, technology, growth, and impact on the Brazilian legal system and beyond.

1. Founded to Tackle Brazil’s Complex Legal Landscape

Enter was born out of the urgent need to address Brazil’s overwhelming litigation environment. With consumer lawsuits flooding courts and labor disputes costing companies billions annually, the founder Mateus Costa-Ribeiro—once Brazil’s youngest practicing lawyer—saw an opportunity to apply AI in transforming how mass lawsuits are processed. Enter’s platform was designed specifically to manage the high volume and complexity of cases Brazilian companies face, setting it apart from generic legal software.

2. Leadership with Deep Legal and Tech Expertise

The company’s leadership team combines deep industry knowledge and technical prowess. Mateus Costa-Ribeiro, who co-founded Enter, entered law school at 14, earned an LL.M. at Harvard Law School, and practiced at Milbank LLP in New York before leaving Stanford’s MBA program to build Enter full time. Cofounders Michael Mac-Vicar and Henrique Vaz bring backgrounds in computer science, gaming technology, and AI, with former leadership roles at Wildlife Studios, a mobile gaming unicorn. This blend drives Enter’s sophisticated AI solutions.

3. AI-Driven Litigation Solutions with Comprehensive Capabilities

Enter’s platform uses advanced AI agents to support lawyers throughout the entire litigation lifecycle. It automates exhaustive document analysis—covering contracts, audio, bank statements, and videos—to produce hyper-customized defense documents. The system detects document fraud, identifies predatory litigation, recommends settlement amounts, interprets court rulings, and predicts appeal outcomes. Human lawyers validate and refine AI outputs, ensuring accuracy and accountability.

4. Strategic Partnerships with Industry Leaders

Enter has quickly established collaborations with some of Latin America’s largest public companies including Mercado Libre, Airbnb, Santander, Itaú, Banco Mercantil, and Magalu. These partnerships validate Enter’s technology and demonstrate significant cost savings and improved efficiency in handling lawsuits. Its success in scaling across multiple enterprises highlights its robust product-market fit.

5. Remarkable Growth and Usage Metrics

Since launching, Enter’s platform has managed over 250,000 lawsuits—equivalent to roughly twice the number of civil cases filed annually in Japan. The company’s average share of cases handled per customer has multiplied fourfold, signaling strong customer retention and expansion. In 2025 alone, Enter expects to process more than 250,000 new claims, underscoring its rapidly growing impact.

6. Raising $35 Million in the Largest Brazilian AI Investment

In 2025, Enter secured a $35 million Series A funding round from prestigious Silicon Valley investors Founders Fund and Sequoia Capital, marking the largest investment in an AI-focused company in Latin America’s history. This significant financial backing fuels Enter’s ambitions to build Latin America’s premier AI company while expanding its legal technology offerings beyond Brazil.

7. Commitment to Privacy and Security Standards

Enter adheres to stringent international security and privacy protocols. The platform does not use client data to train AI models—complying with OpenAI’s Zero Data Retention policy—and incorporates multiple encryption standards such as AES-256 for data at rest and TLS v1.2 for data in transit. Control mechanisms mandate human oversight of low-confidence AI outputs, ensuring reliability and regulatory compliance.

8. Building a Unique Company Culture Focused on Excellence

Enter fosters a strong in-person culture centered on behavioral prescriptions that emphasize immediate candor, delivering outstanding results, and maintaining urgency through a “ship is sinking” mindset. The company invests in creating a “religion” of excellence by recruiting top talent globally and instilling values that promote transparency, rapid innovation, and deep customer focus.

9. Enter OS: Expanding from Drafting to End-to-End Lawsuit Management

Building on early successes with AI-generated lawsuit answers, Enter is developing Enter OS, an integrated platform that manages lawsuits end-to-end. It includes AI agents capable of fraud detection, settlement recommendation, live court updates interpretation, and appellate chance evaluation. Enter OS aims to redefine litigation management, increasing enterprise legal teams’ efficiency and effectiveness further.

10. Vision for Global Leadership in Legal AI

Enter’s founders believe solving Brazil’s litigation challenges—which involve the world’s toughest and most complex legal market—demonstrates the scalability of their platform globally. By combining domain expertise, advanced AI technology, and strong strategic partners, Enter is positioned to lead the revolution in legal AI not only in Latin America but also worldwide, reshaping how enterprises handle legal disputes in the digital era.

Conclusion

Enter’s journey from a visionary startup to a major player in the legal AI space highlights the transformative potential of artificial intelligence applied to one of the world’s most challenging legal markets. With an impressive leadership team, strategic partnerships, robust technology, and strong investor support, Enter is redefining litigation management in Brazil and beyond. As Enter continues to innovate with its operating system and AI agents, it raises compelling questions about the future of legal work, the role of AI in complex industries, and the global possibilities for companies that combine local insight with cutting-edge technology.