It is a universal truth of human nature that the developers who build the code should not be the ones to test it. First of all, most of them pretty much detest that task. Second, like any good auditing protocol, those who do the work should not be the ones who verify it.

Not surprisingly, then, code testing in all its forms — usability, language- or task-specific tests, end-to-end testing — has been a focus of a growing cadre of generative AI startups. Every week, TechCrunch covers another one like Antithesis (raised $47 million), CodiumAI (raised $11 million) and QA Wolf (raised $20 million). And new ones are emerging all the time, like new Y Combinator graduate Momentic.