About Ithaca Builders

Ithaca Builders is a Brazilian software company, founded in 2026 and based in São Paulo. The company runs an agentic development platform: coding agents build and maintain the software, and the client's team supervises the work and reads the code before it goes to production. Every session is logged, from request to result.

Company details

Name:

Ithaca Builders

Legal name:

Ithaca Builders Ltda

CNPJ (Brazilian company ID):

66.942.594/0001-68

Operating since:

May 22, 2026

Headquarters:

Avenida Doutor Arnaldo, 2194, Sumaré, São Paulo/SP, 01255-000, Brazil

Founder:

Yugo Miyahara

Email:

contato@ithaca.builders

LinkedIn:

Ithaca Builders on LinkedIn

Where we work with clients

Clients are welcome at our office on Avenida Doutor Arnaldo, in São Paulo. Ithaca Builders works with clients across Brazil and abroad. Sales meetings can be held in English or Portuguese.

What Ithaca Builders does

The same platform covers new software and legacy systems.

• New software. Built with coding agents, AI-native from the first commit, with the client's team in control.
• Legacy system modernization with AI. Coding agents read the existing code and documentation of the system in production before a single new line is written, so the business rules survive. The new system is built alongside the old one and takes over in parts, while the current system keeps running. See legacy modernization with AI, without stopping the business.

Each deployment is built alongside the client's team. It is not self-service. For what defines the category, see agentic development platform: what it is and what it isn't.

The published case study is Dr. Consulta, which modernized a legacy system in production on the platform: Dr. Consulta case: legacy modernization with coding agents.

How we work: human supervision and traceable sessions

Coding agents do the work. The client's team sets the specification and the autonomy limits, reads the code and decides what goes to production.

Every coding agent session is traceable: the record keeps the request, the steps, the model, the cost, the result and the authorship. What each field shows is covered in coding agent observability.

The platform stops at level 4 of autonomy, on the scale proposed by Dan Shapiro. It is not a dark factory. The full scale is explained in levels of AI coding autonomy.

Not to be confused with

Ithaca Builders (ithaca.builders) is not affiliated with ITHACO Builders or any other construction company in Ithaca, NY (USA). Nor is it affiliated with Ithaca Builders, Inc., in the Philippines.

• ITHACO Builders, LLC: a construction company in Ithaca, New York (USA).
• Ithaca Builders, Inc.: a real estate company in Catanauan, Quezon province (Philippines).

Frequently asked questions