Work

Practical AI for businesses that run at scale.

Five ventures in three years, each one built on what the last one taught. Today the focus is Tenre AI, an in-house AI department for high-volume companies around the world.

tenre.ai
Brennan Harmatz on a video call at his desk
Tenre AI · Founder & CEO · 2026 — now

An AI department, inside the business

Tenre's engineers work directly with mid-market and enterprise teams to find where AI will make a measurable difference, then launch a pilot with clear success metrics. Once the pilot proves itself, Tenre takes it into production and runs it. The final step is training the client's own team so they can take ownership. Clients include GoodLeap, CBRE, Westlake and Catalyst Mortgage, with a combined valuation of $42B. Tenre is based in California and Dallas, Texas, and works with companies around the world.

tenre.ai Careers
Before Tenre

Earlier ventures

2025Ranch Club CapitalFounder. Applied AI at scale to collections and receivables. Built the sales system, pipeline and team, and gained the operating experience that led to enterprise work.California
2025Teamside AICo-founder. AI-driven sales and workflow automation, from lead handling to internal processes, built and deployed alongside the people who use it.Remote
2025Synchro AIRecruited at 17 to support live client deployments and AI system design. Promoted to lead implementations, including client onboarding, workflow mapping and delivering measurable results. Left to co-found Teamside.Early role
2024SimpleFiFounder. A personal finance app that visualizes real transaction data. Taught himself to code, using AI to move faster, and launched on the App Store after a year. Grew a community of more than 5,000 people.@simplefiapp
Tenre AIRanch Club CapitalSimpleFi
Where it started

From eBay to the markets

His first business was reselling on eBay, which taught him about pricing, demand and spotting value early. From there he moved into long-term investing and swing trading, and doubled a separate trading account twice in fifteen months by pairing technical setups with news catalysts. He is the first to admit luck played a part. Looking back, each step led to the next.

Full timeline on LinkedIn
Brennan Harmatz's handwritten notebook of metrics on a desk at night
Working together

Who Tenre works with

Tenre takes on a limited number of engagements with companies around the world. The best fit is a business that handles high volume, such as calls, documents, tickets or transactions, with a team that wants to own the system once it is running. Brennan is also open to advisory, speaking and press requests.

Get in touch Careers at Tenre
Brennan Harmatz working on a laptop on a boat in a cove
Brennan Harmatz on a video call at his desk