Tessl is an AI-native development platform that specializes in Spec-Driven Development (SDD). Founded by Guy Podjarny, the company aims to enhance software development by using natural language specifications to guide AI agents in building, maintaining, and evolving reliable software. Tessl has raised $125 million in Series A funding, achieving a valuation of over $500 million. The company operates in the information and document management industry and employs a small team.
Tessl's main offerings include the Tessl Framework, which allows for defining functionality through framework specs and embedded tests, and the Tessl Spec Registry, which provides reusable knowledge packs for consistent guidance across teams. These tools help prevent common issues in AI development, such as hallucinations and regressions, enabling developers to focus on what to build rather than how to implement it. Tessl emphasizes community-driven innovation and aims to support professional builders in achieving speed and reliability in their coding practices.