The round was led by RPS Ventures, with participation from existing investors Lightspeed Venture Partners, Lux Capital, Insight Partners, Capgemini Ventures, Dallas VC, Dentsu Ventures, and Mozilla Ventures, alongside new strategic investors LG Technology Ventures, Benhamou Global Ventures, and LDV Partners. The funding accelerates Fiddler's vision to become the neutral control plane for compound AI systems as enterprises increasingly incorporate autonomous agents into business-critical workflows. The Fiddler Control Plane will deliver standardized telemetry, reliable evaluation, continuous monitoring, enforceable policy, and auditable governance across the AI lifecycle.

Fiddler is the all-in-one AI Observability and Security platform for responsible AI. Our evaluations, monitoring and analytics capabilities provide visibility, context and control across development and production. This gives teams actionable insights to build better, more reliable AI agents, and GenAI and ML applications. An integral part of the platform, the Fiddler Trust Service provides quality and moderation controls for AI agents and GenAI applications. Powered by cost-effective, task-specific, and scalable Fiddler-developed Trust Models - they deliver the fastest guardrails in the industry. Fiddler offers flexibility in secure deployment options through cloud and VPC environments.