Esterel Technologies is a supplier of model-based design, validation, and code generation tools for safety-critical software and hardware applications.

Esterel Technologies, a wholly owned subsidiary of Ansys, Inc., has offices in Élancourt, France, and Mountain View, California.

Distributors in Japan, China, South Korea, Israel, and India complement the Esterel direct sales offices.

Its first product, Esterel Studio, was meant to bring synchronous programming language benefits to the industry (initially telecommunications and then EDA Electronic design automation).

In 2006, the tool developed by THALES to design the A380 cockpit, named IMAGE, was transferred to Esterel Technologies, and re-branded SCADE Display.