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With AI, Everyone is a Dev. EveryDev.ai ©
    1. Home
    2. Developers
    3. Patronus AI, Inc.

    Patronus AI, Inc.

    Patronus AI is a behavioral research lab for AI. It builds worlds and simulations for models and agents to explore, evaluates what they do and why, and develops training data and infrastructure to improve reliability and judgment.

    Visit Website

    At a Glance

    2Tools Listed
    8Products
    93Tool Views
    8Capabilities
    Discussions
    San Francisco, CaliforniaHeadquarters
    2023Est.
    72Employees
    $70MRaised
    Focus Areas
    Automated Testing
    Agent Frameworks
    Observability Platforms
    LLM Evaluations
    Connect
    Latest News
    Announced $50M Series B and previewed the first Digital World Model for AI-agent training and simulation.Jun 25, 2026
    TechCrunch reported that Patronus AI raised $50M to build digital worlds that stress-test AI agents.Jun 25, 2026
    Markets
    • Foundation-model labs
    • Fortune 500 and enterprise AI teams
    • Financial services
    • Healthcare
    • +4 more

    AI Tools by Patronus AI, Inc.

    (2)
    View TRAIL Benchmark
    TRAIL Benchmark tool icon

    TRAIL Benchmark

    Agent Trace Debugging Benchmark

    LLM EvaluationsAgent FrameworksObservability
    View Patronus AI
    Patronus AI tool icon

    Patronus AI

    LLM Evaluation and Monitoring Platform

    LLM EvaluationsAutomated TestingObservability

    Discussions

    No discussions yet

    Be the first to start a discussion about Patronus AI, Inc.

    Latest News

    06/25/2026

    Announced $50M Series B and previewed the first Digital World Model for AI-agent training and simulation.

    patronus.ai
    06/25/2026

    TechCrunch reported that Patronus AI raised $50M to build digital worlds that stress-test AI agents.

    techcrunch.com
    12/17/2025

    Introduced Generative Simulators, autonomously scalable training environments for agents.

    patronus.ai
    10/14/2025

    Introduced MEMTRACK, a benchmark for agent memory.

    patronus.ai

    Products & Services

    8
    Patronus AI Evaluation Platform / Evaluation API

    Managed evaluation and guardrail infrastructure for testing LLM and agent inputs and outputs, including pre-built and configurable judge evaluators, hallucination detection, compliance and security checks, tracing, and production monitoring.

    Patronus-DWM (Digital World Model)
    June 25, 2026

    A preview digital-world model based on language diffusion that predicts realistic environment behavior and steers agent actions across coding, dialogue, research, GUI, and general tool-use workflows.

    FinanceBench
    November 16, 2023

    Benchmark for evaluating LLM performance and hallucinations on financial questions and SEC-filing analysis.

    Lynx and HaluBench
    July 11, 2024

    Lynx is an open-source hallucination-detection judge model; HaluBench is a 15,000-sample benchmark covering real-world domains including finance and medicine.

    Market Position

    Patronus positions itself at the intersection of LLM evaluation, reliability/guardrails, and agent simulation. Compared with conventional static benchmark and observability vendors, it emphasizes behavioral research, domain-specific judges and benchmarks, trace-level diagnosis, dynamic simulated environments, and digital world models for long-horizon agent training. Relevant alternatives include Arize/Phoenix, Braintrust, LangSmith, Humanloop, Weights & Biases, Giskard, and other LLM-evaluation and guardrail platforms.

    Leadership

    Founders

    AK

    Anand Kannappan

    Co-founder and CEO; met Rebecca Qian while studying computer science at the University of Chicago and subsequently worked at Meta, bringing AI research, alignment, and applied machine-learning experience.

    RQ

    Rebecca Qian

    Co-founder and CTO; met Anand Kannappan while studying computer science at the University of Chicago and subsequently worked at Meta, bringing complementary AI research, alignment, and applied-machine-learning experience.

    Executive Team

    AK

    Anand Kannappan

    Co-founder & CEO

    Former Meta researcher; studied computer science at the University of Chicago with co-founder Rebecca Qian.

    RQ

    Rebecca Qian

    Co-founder & CTO

    Former Meta researcher; studied computer science at the University of Chicago and leads the company's technical direction.

    Board of Directors

    GS
    Glenn Solomon
    Board member; joined as part of the Series A

    Founding Story

    Kannappan and Qian started Patronus after meeting at the University of Chicago and working at Meta. They launched out of stealth in September 2023 to understand where AI models fail—initially across financial reasoning, factual accuracy, and sensitive-information handling—and to build infrastructure for trustworthy evaluation and, increasingly, scalable simulation for agents.

    Business Model

    Revenue Model

    Enterprise software and managed API/platform access for AI evaluation, monitoring, guardrails, and agent reliability; the company also offers research artifacts and open-source models/benchmarks.

    Private company; no IPO filing or announced IPO plan found.

    Target Markets

    Industries & Segments
    • Foundation-model labs
    • Fortune 500 and enterprise AI teams
    • Financial services
    • Healthcare
    • Legal
    • Software engineering and coding
    Use Cases
    • Testing and comparing foundation models and prompts
    • Evaluating RAG systems and multi-agent workflows
    • Production monitoring and guardrails for LLM applications
    • Detecting hallucinations, incorrect financial analysis, unsafe outputs, and policy violations
    • Training and stress-testing agents on coding, knowledge work, research, dialogue, software/computer use, and long-horizon tasks
    • Debugging execution traces to localize reasoning, planning, and tool-use errors
    Notable Customers
    • Adobe
    • Chime

    Quick Facts

    Headquarters
    San Francisco, California, United States
    Founded
    2023
    Entity Type
    Inc.
    Employees
    72
    Total Funding
    $70M across seed, Series A, and Series B
    Investors
    Greenfield Partners, Lightspeed Venture Partners
    Office Locations
    San Francisco
    Lyon

    Funding History

    Seed$3M
    September 2023
    Lightspeed Venture Partners
    Series A$17M
    May 2024
    Notable Capital
    Series B$50M
    June 25, 2026
    Greenfield Partners

    History & Milestones

    June 25, 2026

    Announced a $50M Series B led by Greenfield Partners and previewed Patronus-DWM, its first Digital World Model for agent training and simulation.

    December 17, 2025

    Introduced Generative Simulators for autonomously scaling agent environments.

    October 14, 2025

    Introduced MEMTRACK, a benchmark for agent memory across workplace tools.

    June 5, 2025

    Introduced TRAIL, a benchmark for agentic evaluation and trace issue localization.

    October 15, 2024

    Announced an investment from InvestInData.

    Key Capabilities

    8
    LLM and AI-agent evaluation in offline and online/production settings
    Pre-built and configurable LLM-as-a-judge evaluators
    Hallucination and factuality detection
    Compliance, safety, security-vulnerability, toxicity, and PII-leakage checks
    Tracing and span-level observability for multi-step agent workflows
    Benchmarks and datasets for finance, agent trace debugging, memory, hallucination, coding, research, dialogue, and computer use

    Integrations & Partnerships

    Platform Integrations

    • Patronus managed Evaluation API
    • Python SDK and tracing integrations
    • Hugging Face for public Lynx and HaluBench artifacts
    • TrueFoundry AI Gateway
    • CrewAI
    • NVIDIA NeMo Guardrails

    Key Partnerships

    InvestInData investment (announced October 2024)
    AWS Startups ecosystem/customer technology coverage
    Integration documentation with TrueFoundry AI Gateway

    Connect

    Website
    patronus.ai/
    GitHub
    patronus-ai
    X / Twitter
    PatronusAI

    AI Topics

    4

    Patronus AI, Inc. focuses on these topics:

    Automated Testing(1)
    Agent Frameworks(1)
    Observability Platforms(2)
    LLM Evaluations(2)
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