# Retrace

> Record, replay, fork & share AI agent executions.

Record, replay, fork & share AI agent executions. See every LLM call, tool call, and error your agent makes, then debug in seconds. Free for 1,000 traces/mo.

## Facts
- Website: https://retraceai.tech
- Pricing: free
- Categories: AI & Machine Learning
- LotsDirectory page: https://lots.directory/products/retrace
- Listing state: Unclaimed. We listed this product from its public website, and its owner has not claimed it yet.

## Detailed info

## What is Retrace?

Retrace is an AI agent recording and debugging platform with replay, execution forks, guardrails, and regression evaluation.

## What Retrace does

Retrace records model calls, tool calls, costs, and errors on a timeline. Users replay a run or fork from a selected step, modify input, and inspect the resulting execution. Evaluations and CI gates test changes against recorded failures.

## Who Retrace is for

Solo builders and teams developing Python or TypeScript agents can use Retrace for debugging and regression checks. It supports multiple agent frameworks and model providers.

## How Retrace works

The user installs the SDK and adds a recording decorator in Python or wraps a function in TypeScript. Running the agent streams calls and errors to the timeline. A recorded span can be forked with changed input, replayed, and evaluated to check whether behavior improved, regressed, or remained unchanged.

## Key features

- Automatic instrumentation captures prompts, responses, token usage, latency, and cost.
- Interactive timelines support playback, pause, and step-by-step inspection.
- Fork replay carries modified context into subsequent model calls.
- Guardrails monitor budgets, loops, context overflow, and latency caps.
- CI regression gates can fail a build when evaluated behavior breaks.
- Semantic search locates traces using a description of the problem.
- Agent topology and sessions show ordering across multiple agents.
- Sensitive values are redacted before storage on every plan.

## Pricing

As listed on retraceai.tech, checked 14 October 2026. Prices can change; see the site for current terms.

- Free: $0 with 1,000 traces and 10 fork replays per month.
- Starter: $29 per month.
- Pro: $99 per month.
- Teams: $399 per month.
- Enterprise: contact the provider.

## Facts from retraceai.tech, checked 14 October 2026

- The free plan does not require a credit card.

Written from Retrace's own website ([Homepage](https://retraceai.tech/), [Pricing](https://retraceai.tech/pricing), [Features](https://retraceai.tech/features/record), [Docs](https://retraceai.tech/support)). The maker can claim this listing to edit it.

## FAQ

### Which languages are supported?
Python and TypeScript SDKs support automatic capture for OpenAI, Anthropic, and Google Gemini.

### Which frameworks are named?
The site lists LangChain, CrewAI, Vercel AI SDK, AutoGen, and LlamaIndex.

### How does a fork work?
Users select a span, modify its input, and replay from that point forward, with a side-by-side diff of cost and latency.

### Can it run in CI?
The evaluation gate returns pass or fail against a threshold, and the CLI exits with code 1 on failure.

### Can replays use a user’s model account?
A Google Gemini key powers evaluation judges and server-side replay. OpenAI and Anthropic keys can be stored, with native replay described as coming.

### Does it capture events during disconnection?
An offline buffer queues events and flushes them after reconnecting.

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Source: https://lots.directory/products/retrace · Machine-readable context by LotsDirectory.