Fiddler AI vs TrojAI

Fiddler AI is an AI observability and security platform founded in 2018 and headquartered in Palo Alto, California, by Krishna Gade, Amit Paka, and Manoj Cheenath. Fiddler focuses on production monitoring — drift, performance, fairness, explainability — and has extended into LLM observability and security for compound and agentic AI systems. Fiddler raised a $30M Series C in January 2026, bringing total funding to $100M.

TrojAI is a Saint John, New Brunswick-based AI security company founded in 2019 by James Stewart and Stephen Goddard. The company provides an enterprise AI security platform with two core products: TrojAI Detect (pre-deployment model red teaming and vulnerability assessment) and TrojAI Defend (runtime AI firewall for AI applications and agents). In 2025, TrojAI extended Defend to cover MCP (Model Context Protocol) server governance, providing visibility and policy enforcement for agentic AI workflows. TrojAI serves primarily large enterprise customers in financial services and technology, helping them align with NIST, OWASP, MITRE ATLAS, and CSA frameworks. The company participated in Google's 2023 accelerator program for Canadian startups and was listed on the Vector Institute's '20 Canadian AI Startups to Watch.' TrojAI raised $5.75M in seed capital in April 2024 and maintains offices in Saint John, Fredericton, and Boston.