Control user and model behavior in real timeControl user and model
behavior in real time
Test
Discover failure modes before your users do
Control
Enforce behavior across inputs, outputs, and tools
Analyze
Understand how your users and AI behave over time
Improve
Tune prompts and models from live signals
“White Circle protects millions of AI interactions every day while helping us move faster.”
Durk Kingma/ex-Cofounder of OpenAI
Zach Gleicher/Research PM
Thomas Wolf/Cofounder & CSO
Guillaume Lample/Cofounder & CSO
Paige Bailey/Head of DevExp
Petra Grutzik/PM of Gemini
Mehdi Ghissassi/ex-Head of Product
Karl Tuyls/ex-Research Director
Olivier Pomel/Cofounder & CEO
David Cramer/Cofounder & CPO
Francois Chollet/Cofounder
Durk Kingma/ex-Cofounder of OpenAI
Zach Gleicher/Research PM
HuggingFaceThomas Wolf/Cofounder & CSO
MistralGuillaume Lample/Cofounder & CSO
Paige Bailey/Head of Dev Experience
Petra Grutzik/PM of Gemini Pre-training
Mehdi Ghissassi/ex-Head of Product
Karl Tuyls/ex-Research Director
Olivier Pomel/Cofounder & CEO
David Cramer/Cofounder & CPO
Francois Chollet/Cofounder
White Circle works for your entire AI lifecycle
Alert sent to #security — rm -rf / flagged for review
Session terminated — rm -rf / never reached the shell
Your agent is trying to run rm -rf /
Do you want to continue?
Define policies
Describe how AI and users should behave across safety, security, compliance, and reliability.
Adapt to every region
Apply different policies based on a user's location or jurisdiction.
Constrain behavior
Automatically block, rewrite, or escalate risky behavior in real time.
Audit decisions
See what happened, why it happened, and which policies were triggered.
See the bigger picture
Explore how everything fits together and collaborate with your team
Control every AI interaction
Monitor behavior, apply safeguards, and improve AI systems in real time.
Built for production AI
Real-time protection, analytics, and optimization for teams shipping AI at scale.
Go to Trust Center ↗
Enterprise-grade security for your AI deployments
One control layer,
every industry
Research
The systems, methods, and experiments that shape how we build and safeguard AI products.
KillBench: discovering hidden biases of LLMs
Evaluating decision-making biases across frontier AI models.
CircleGuardBench: Evaluating AI Moderation Models
Measuring the real-world performance of AI guardrails.