promptfoo

Based on the available evidence, promptfoo looks like a solid open-source tool worth adopting for engineering-led teams, not just a project riding hype. That judgment comes mainly from the official GitHub repo clearly defining its scope, plus a small number of practitioner posts describing uses such as benchmarking, regression checks, CI runs, and failure detection. Those are stronger signals than stars or reposts alone. By contrast, GitHub growth and social amplification only prove attention, not that every evaluation setup will be reliable or easy to use.