AI security startup Promptfoo has raised $18.4 million in Series A funding led by Insight Partners, bringing its total to $23.4 million. Founded in 2024, the San Francisco-based company helps organizations secure LLMs and generative AI apps against risks like prompt injections, jailbreaks, and data leaks through automated red-teaming and vulnerability management. The new funding will support platform development and team expansion as Promptfoo scales to meet growing enterprise demand.

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