Fundraising Fox

Lexter.ai

YC W22

São Paulo, BR · Founded 2020 · 18 employees · 6 known investors

Lexter develops a large language model tailored for legal work in Brazil and serves major law firms in the country.

Also known as Lexter

Founders & leadership· Y Combinator alumni (W22)

Lexter.ai was founded in 2020 by Pedro Jahara, Pedro Calderon, Guilherme Delai, and Lucas Kawazoi.

PJPedro Jahara
Pedro JaharainCo-founder & CEOPedro Jahara is Co-founder and CEO of Lexter.ai, and previously founded BelugaDB, a self-service business intelligence tool for big data, and R2U.io, an augmented reality platform for e-commerce conversion optimization. He has also served as CEO of Revmob and worked as a consultant at Bain & Company.
PCPedro Calderon
Pedro CalderoninCo-founderPedro Calderon studied naval engineering at USP in Brazil before transitioning to software development at RevMob. He founded eDoc, a health tech startup focused on primary care efficiency in the Brazilian healthcare system, and later co-founded Lexter.ai to work in legal technology.
GDGuilherme Delai
Guilherme Delaiin𝕏Co-Founder (YC W22)Guilherme Delai is the technical cofounder of Lexter.ai.
LKLucas Kawazoi
Lucas KawazoiinCo-FounderLucas Kawazoi is founder of Lexter.ai, which develops a large language model tailored for legal work in Brazil.

Investors · 6

Also in the syndicate · 1

Grão VC

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Company profile

researched Aug 2026

Lexter.ai is a Brazilian legal technology company that sells AI-based "virtual specialists" for law firm operations. Its main product persona, Laura, is presented as a virtual legal specialist trained to interpret case context and automate technical and operational tasks: monitoring case dockets and notifying users of new procedural movements in real time, drafting legal filings, contracts and notifications, searching case law, summarizing complex documents and producing procedural reports, suggesting evidence and documents needed for filings, generating interview and hearing scripts, and preparing settlement proposals and legal opinions along with suggested next steps and strategy.

A second persona, Lia, is positioned as a virtual relationship specialist handling external client communication by email and WhatsApp, using the official Meta WhatsApp API for 24-hour coverage. Lia's described functions include interviewing and qualifying inbound contacts as leads and answering client questions about services, cases and status updates; routing complex demands to human staff and automating generation of contracts and powers of attorney are listed as forthcoming features. The company emphasizes specialization in Brazilian law, continuous availability, and compliance with Brazil's LGPD data protection law.

Business model

Software-as-a-service sold to law firms on a subscription basis, packaged as a single plan at a fixed price rather than tiered offerings.

Recurring subscription revenue; the website lists a single "Lexter Essencial" plan at R$199 per month covering case monitoring, document drafting, case-law search, document summarization, and settlement proposals and opinions.

Traction

The company states that thousands of law offices in Brazil use its virtual specialists to automate operations. Published testimonials come from a partner at Vencovsky Advogados and from a firm with more than 40 lawyers, which cite reduced time spent on case triage and research, faster client communication and contract closing, and lower manual workload.

Full profile — market position, technology, go-to-market, geography

Market position

Positions itself on specialization in Brazilian legal demands, round-the-clock availability of its virtual specialists, LGPD-compliant data protection, and a single fixed-price plan.

Technology

Artificial-intelligence-based virtual assistants trained for Brazilian legal work, applied to legal drafting, case-law retrieval, document summarization and case-movement monitoring. Client communication is delivered through the official Meta WhatsApp API. The company states compliance with the LGPD, Brazil's data protection regulation.

Go-to-market

Direct self-service sign-up and plan purchase through the company website, supported by customer testimonials from partner-level lawyers at Brazilian firms and onboarding support for new accounts.

Brazilian law firms and practicing lawyers, including small offices seeking to delegate repetitive legal tasks and larger firms with high case volumes, such as one cited customer with more than 40 lawyers.

Geography

Operates in Brazil, with a Portuguese-language product and virtual specialists trained for Brazilian legal requirements.

Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
HeadcountAug 202626
List price monthly subscriptionJan 2025199 BRL/month

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

In the news

Research sources · 1

primary sources listed

1 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Lexter.ai do?
Brazilian legal-tech company offering AI "virtual specialists" that automate law firm document, research and client-contact work.
Who founded Lexter.ai?
Lexter.ai was founded by Pedro Jahara, Pedro Calderon, Guilherme Delai, Lucas Kawazoi in 2020.
Who are Lexter.ai's investors?
Lexter.ai's investors include Alexia Ventures, Norte Ventures, Y Combinator, Canary, Endeavor Scale-Up.
Where is Lexter.ai headquartered?
Lexter.ai is headquartered in São Paulo, BR.