TensorZero builds an open-source stack that unifies an LLM gateway, observability, optimization, evaluation, and experimentation for industrial-grade LLM applications. The project has attracted strong open-source adoption, reaching the '#1 trending repository of the week' spot globally on GitHub and receiving contributions from dozens of developers. TensorZero says its stack is already powering LLM products at frontier AI startups and a large European bank. The company's long-term vision is to create a data and learning flywheel that turns production metrics and human feedback into continually improving models and agents. The founding team includes technical founders with PhDs and experience at top institutions, former maintainers of major open-source projects, and product leadership experience (CEO previously served as chief product officer at Ondo). The company intends to use the new capital to accelerate development of its open-source infrastructure for LLM engineers.

Total raised

$7M

Funding rounds

1

Latest round

Seed

Latest activity

Aug 2025