Problem

Lexter.ai addresses the costly, repetitive, and document-heavy work that consumes lawyers’ time, including contract review, legal research, process monitoring, and drafting. Its clearest killer use case is M&A due diligence: instead of assigning a team to read a large contract repository manually, a firm can have the system identify specified risks, clauses, and weaknesses and produce a review report. Lexter has reported reducing document-analysis time by up to 90% and making delivery up to ten times faster.

The pain is not only labor cost but also the risk of missing important provisions or relying on generic AI that invents plausible but incorrect legal reasoning. Lexter therefore targets the need for faster legal work that remains grounded in Brazilian law, while positioning the lawyer as the final reviewer rather than eliminating professional judgment.

Product / Service

Lexter is a legal-technology SaaS platform that combines proprietary legal AI with large language models to read, analyze, revise, summarize, and write legal materials. Its current offering is organized around virtual specialists such as Laura, which can monitor cases, draft petitions, contracts, and notifications, search jurisprudence, suggest strategies, summarize complex documents, and support client communications through WhatsApp. The public site presents a fixed-price Lexter Essencial plan at R$199 per month and includes a self-service signup flow.

In the core workflow, the lawyer supplies case or document context; Lexter evaluates it against Brazilian laws, regulations, and the client’s defined legal strategy, then produces findings, a proposed strategy, or a first draft in the user’s preferred editor. The output is intended to be reviewed and refined by the lawyer, delivering productivity and turnaround benefits while preserving human control over the final legal work.

Market

Lexter competes in Brazilian LegalTech and AI software for law firms, legal departments, and ultimately smaller independent practices. It began with contract intelligence for corporate transactions, due diligence, and audits, then expanded toward a broader legal copilot for everyday litigation and office operations. Comparable legal-AI and contract-management competitors identified in company databases include Harvey, Spellbook, and LinkSquares, while Lexter differentiates itself through Brazilian legal context and Portuguese-language workflows.

The company is commercially active rather than pre-revenue. Founded in 2020 and a Winter 2022 Y Combinator company, Lexter reported working with three of Brazil’s five largest law firms; it raised R$16 million in 2024 from Alexia Ventures, Grão VC, Canary, and Endeavor Scale Up. Reporting around that round cited nearly 200 customers at the end of 2023, a base of about 1,000 users, and 300% year-over-year revenue growth, while the current company site claims more than 1,000 offices and lawyers use Lexter. These figures come from different dates and may use different definitions of customer, user, office, and lawyer, but together indicate meaningful adoption and paid-market traction rather than a pre-revenue product.