Monitor, Control, and Trust your AI Stack
Cleisto provides the observability, reliability, and security layer for your LLM applications. Track costs, catch errors, and redact sensitive data in real-time.
Everything you need to scale AI confidently
Built for developers who care about reliability and security.
Deep Observability
Track every request, token, and penny. Visualize cost trends and latency histograms in real-time.
Guardrails & Rules
Set custom rules to block malicious prompts, limit costs, or alert on high latency spikes.
PII Protection
Automatically detect and redact sensitive information like emails and phone numbers before they leave your infrastructure.
Universal Proxy
One API for OpenAI, Anthropic, and local models. Switch providers without changing your code.
Low Latency
Built on ZIO and Rust for sub-millisecond overhead. Your users won't notice we're there.
Trace Analytics
Group complex agent workflows into traces to understand the full context of AI interactions.
Free for now
Cleisto is currently free to use. Pricing plans will be introduced as we develop more advanced features in the future.
Ready to take control?
Join thousands of developers building reliable AI applications with Cleisto.