Comparison
Syrin vs Braintrust
Braintrust scores your evals. Syrin controls your live agents.
Syrin is the runtime control layer for AI agents in production. Not evaluation pipelines - live control: detect behavioral drift the moment it happens, recover without redeploying, and change any config value live. Built for teams running production agent fleets, not test datasets.
Braintrust is an LLM evaluation and experimentation platform. It provides offline eval pipelines, prompt playgrounds, human annotation workflows, scoring functions, and dataset management. Braintrust is strong for teams building rigorous eval processes before shipping.
Feature comparison
Syrin wins 6 of 9 categories. Braintrust wins 3.
| Feature | Syrin | Braintrust |
|---|---|---|
| Primary use case | Runtime control of live AI agents in production | LLM evaluation, offline testing, and dataset scoring |
| Real-time drift detection | Automatic - flags behavioral drift as it happens in production | Not available - evals run on fixed datasets, not live traffic |
| Production recovery | One-click restore to any behavioral checkpoint, no redeploy | Not available |
| Live agent config changes | Agent Config: change model, prompts, flags live without deploying | Prompt playground for offline iteration, not live production changes |
| A/B experimentation on live traffic | Route live production traffic across agent variants in real time | Offline A/B on datasets, not live traffic splits |
| Offline eval pipelines | Not in scope | Core strength: eval functions, scoring, LLM-as-judge, human review |
| Dataset and annotation management | Not in scope | Built-in dataset versioning and human annotation workflows |
| Multi-agent distributed tracing | Full distributed trace across all agents in a pipeline | Logging and traces for LLM calls, limited multi-agent support |
| Agent governance | Policy enforcement, approval workflows, audit trail for AI actions | Not available |
Choose Syrin when...
- You are running AI agents in production and need live runtime control
- You need to detect and recover from behavioral drift without a redeployment
- You need live A/B experimentation on real user traffic
- You need distributed tracing across multi-agent pipelines
- You need governance policies and audit trails for enterprise or regulated use
Choose Braintrust when...
- You need structured offline evaluation pipelines before shipping
- You need human annotation and LLM-as-judge scoring
- You need dataset versioning and eval dataset management
- You want a prompt playground for iterating on prompts before deploying
Frequently asked questions
Syrin vs Braintrust
See Syrin for yourself
Free tier. 2-minute setup. Works with your existing agent code.