Control Loop v0.1 — now live
Evals score every output. A closed control loop retries with a fallback model, gates high-stakes actions on human approval, and rolls back automatically when a fix introduces a new regression — turning every production failure into a system fix before it hits the next user.
Free tier includes 1M spans / month · No credit card
Works with
OpenAIAnthropicClaude (MCP)LangChainLangGraphAutoGenCrewAILlamaIndexPydanticAIDSPyHaystackVercel AI SDKMastraLlamaIndex-TSCustom LLMs
How teams use TruLayer
Most tools stop at the trace. TruLayer takes you from “something’s wrong” to “here’s the fix, shipped” in one platform.
See what’s happening. Understand why.
Distributed traces, failure clustering, anomaly detection, and semantic search — everything you need to go from "something’s wrong" to "here’s exactly why." Configurable retry depth prevents runaway cascades: when a trace has been retried N times without passing eval, it escalates to the human-in-the-loop queue automatically.
Explore observeKnow whether it was correct, not just whether it ran.
25 pre-built evaluators, eval rules on any span, regression testing against golden datasets, and score trends over time.
Explore evaluateClose the loop before the next user hits it.
AI-suggested prompt improvements, self-healing actions, human-in-the-loop approval, and remediation diffs — the full control loop.
Explore improveWho uses TruLayer
TruLayer keeps them on track — automatically, at the system level, before the same failure hits the next user.
Instrument in minutes
Wrap any OpenAI, Anthropic, or custom LLM client with TruLayer. Every call, chain, and tool use is automatically traced — no manual spans, no config files.
How it works
1
Wrap your LLM client with two lines of code. Supports OpenAI, Anthropic, and any custom model.
2
Every agent step, tool call, and chain hop appears in your trace explorer in real time.
3
Automatic evals score every output. Failure alerts and auto-remediation close the loop.
Built for this
TruLayer is purpose-built for teams shipping LLM features to production — not adapted from general-purpose APM.
You already have traces, evals, and a feedback queue — in three different tools, with three integrations to maintain and no shared data model. TruLayer puts tracing, automated evaluation, and human feedback in a single pipeline. One place to see what ran, how it scored, and what to fix.
If your stack already speaks OpenTelemetry, TruLayer fits without a rewrite. Send spans over OTLP — same exporter you use for everything else. No proprietary SDK to lock in, no parallel instrumentation to maintain. When you outgrow TruLayer, your traces leave with you.
Sign up, add two lines, see your first trace. No YAML, no collector config, no support ticket. The quickstart is written for engineers who have a running agent today — not for teams evaluating a six-month rollout.
Ready to see your first trace? Start the quickstart
Pricing
Start free. Scale with your usage. No credit card required on Starter.
Starter
$0/ month
No credit card required
Pro
$149/ month
$5 / additional 1M spans
Team
$699/ month
$4 / additional 1M spans
Biz
Coming soon
Large teams beyond 15 seats. Contact us for custom pricing.
Enterprise
Custom volume · Dedicated support · Compliance-ready
Need custom volume, procurement, or dedicated support? Let's talk.
Annual billing saves 20% on the Team plan. No credit card required on Starter.
Observability tells you what broke. TruLayer tells you what broke, why, and fixes it automatically. Start free.
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