# Lexter.ai **Source:** https://geo.sig.ai/brands/lexterai **Vertical:** Legal **Subcategory:** General **Tier:** Emerging **Website:** lexter.ai **Last Updated:** 2026-04-14 ## Summary São Paulo legal AI for Brazilian law with Portuguese-trained models for contract review and case strategy; $4.22M YC-backed at 300% growth serving top-5 Brazilian law firms in highly litigious market. ## Company Overview Lexter.ai is a São Paulo-based legal technology company providing AI-powered document analysis, legal research, and case strategy tools specifically designed for Brazilian law — combining large language models with a proprietary Brazilian legal AI trained on the specific language, citations, and reasoning patterns of Brazilian civil law, labor law, and corporate law. Founded in 2020 and backed by Y Combinator and Alexia Ventures with $4.22 million raised including a $3.2 million Series A, Lexter.ai works with three of Brazil's top five law firms, serves 1,000+ users across 200+ law firms, and achieved 300% revenue growth in 2023. Lexter's Brazilian legal focus is the core differentiation: Brazilian Portuguese legal language, civil law traditions (Código Civil, CLT labor code), and court citation patterns are materially different from US common law — generic AI tools trained primarily on English content perform poorly on Brazilian legal documents. Lexter's AI has been trained on Brazilian case law, legal doctrine, and practitioner writing, enabling accurate legal document analysis, contract review, and case research in the specific context Brazilian lawyers work in. The platform handles contract review (identifying unusual clauses, summarizing key terms), legal research (finding relevant jurisprudência and legal precedent), and document drafting assistance. In 2025, Lexter.ai competes in the Brazilian and Latin American legal tech market with Legalrec (Brazilian legal AI), LawGeex (contract AI), and US legal AI platforms (Harvey AI, Casetext's CoCounsel) that lack deep Brazilian law training for Portuguese-language legal practice. Brazil is one of the world's most litigation-intensive countries (Brazil has approximately 83 million pending judicial cases) — the legal industry is large and the demand for efficiency tools is acute. Law firm customer validation (including top-5 Brazilian firms) provides the enterprise credibility needed for further large firm sales. The 2025 strategy focuses on deepening the coverage of Brazilian procedural law and federal court jurisprudência, expanding to corporate legal departments, and building the integration with Brazilian court portals for automated filing and case monitoring. ## Frequently Asked Questions ### What is Lexter.ai? Lexter.ai is a São Paulo-based legal tech company founded in 2020 that develops a legal LLM (Large Language Model) platform for the Brazilian market. The company combines proprietary technology with LLMs to help lawyers with everyday legal tasks including reading and writing documents, providing legal reasoning, and outlining case strategies. ### What products and services does Lexter.ai offer? Lexter.ai offers a legal LLM platform that can read and write legal documents, provide AI-powered legal reasoning for cases, and outline strategies for attorneys. The platform is designed to tackle everyday problems faced by legal professionals in Brazil. ### Who are Lexter.ai's target customers? Lexter.ai serves law firms in Brazil, currently working with 3 out of the top 5 law firms in the country. The platform has 1,000 users across 200+ law firms and operates on a freemium model for expansion across Brazil. ### When was Lexter.ai founded and by whom? Lexter.ai was founded in 2020 by Pedro Jahara, Pedro Calderon, Lucas Kawazoi, Guilherme Delai, and Daniela Sumer Labella. The company was part of Y Combinator's Winter 2022 batch. ### Where is Lexter.ai located? Lexter.ai is based in São Paulo, Brazil. ### How much funding has Lexter.ai raised? Lexter.ai has raised a total of $4.22M in funding, including a Series A round of $3.2M (R$16M) in April 2024 led by Alexia Ventures. Other investors include Y Combinator, Endeavor Brasil, and Equitas. ### What are Lexter.ai's key achievements and metrics? Lexter.ai achieved 300% revenue growth in 2023 and is projecting a 9-fold increase. The company serves 1,000 users across 200+ law firms and works with 3 of the top 5 law firms in Brazil, making it the first legal LLM company in the country. ### What technology approach does Lexter.ai use? Lexter.ai combines a proprietary platform with Large Language Models (LLMs) specifically designed for legal applications. The company employs a team of 35 tech professionals and lawyers to develop and maintain the platform. ### How can I get started with Lexter.ai? Lexter.ai operates on a freemium model for expansion across Brazil. Specific contact and onboarding details are not provided in the available information. ### What are the recent developments at Lexter.ai? Most recently in April 2024, Lexter.ai closed a $3.2M Series A funding round led by Alexia Ventures. The company is experiencing strong growth with 300% revenue increase in 2023 and projecting a 9-fold increase while expanding its presence across Brazil. ## Tags automation, b2b, enterprise, legal-tech, saas, services --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*