Ada vs Lean

Ada is a statically typed, structured programming language designed for safety-critical and high-integrity systems. Developed originally for the U.S. Department of Defense, it is widely used in aerospace, defense, avionics, and embedded systems. AdaCore provides the primary commercial toolchain (GNAT Pro) along with static and dynamic analysis suites.

Lean is functional programming language and interactive theorem prover, used for formal mathematical proofs and verified software. It provides comprehensive features for programming language workflows. The tool is actively maintained with regular updates and strong community/vendor support.