Best Braintrust Alternatives 2026

Top alternatives to Braintrust for code assistants

Braintrust

★★★★☆ Freemium

AI evaluation and testing platform for measuring and improving LLM output quality

5 Best Alternatives to Braintrust

#1

Langfuse

★★★★☆ 4.4/5 Open Source

Open source evals + tracing, stronger observability focus

Open source LLM observability platform for traces, evaluations, and prompt management

Full LLM call tracing with input/output captureAgent and multi-step workflow visualizationPrompt versioning and A/B testingLLM-as-judge and human eval scoring
#2

Helicone

★★★★☆ 4.3/5 Freemium

Simpler logging and analytics, less eval depth

LLM observability proxy for logging, caching, and analyzing every AI call

Zero-code setup via URL redirectComplete request/response loggingCost tracking per API key and userSemantic caching for repeat queries
#3

Weights & Biases

★★★★★ 4.9/5 Freemium

ML experiment tracking that also covers LLM eval workflows

MLOps platform for tracking experiments, comparing models, and monitoring AI in production

Experiment trackingModel comparisonHyperparameter sweepsProduction monitoring
#4

Langfuse

★★★★☆ 4.4/5 Open Source

Open source LLM observability with stronger tracing and prompt management

Open source LLM observability platform for traces, evaluations, and prompt management

Full LLM call tracing with input/output captureAgent and multi-step workflow visualizationPrompt versioning and A/B testingLLM-as-judge and human eval scoring
#5

Helicone

★★★★☆ 4.3/5 Freemium

Simpler hosted LLM proxy with cost tracking, less evals focus

LLM observability proxy for logging, caching, and analyzing every AI call

Zero-code setup via URL redirectComplete request/response loggingCost tracking per API key and userSemantic caching for repeat queries

Quick Comparison

Tool Rating Pricing Category Why Consider It
Langfuse ★★★★☆ 4.4 Open Source Code Assistants Open source evals + tracing, stronger observability focus
Helicone ★★★★☆ 4.3 Freemium Code Assistants Simpler logging and analytics, less eval depth
Weights & Biases ★★★★★ 4.9 Freemium Code Assistants ML experiment tracking that also covers LLM eval workflows
Langfuse ★★★★☆ 4.4 Open Source Code Assistants Open source LLM observability with stronger tracing and prompt management
Helicone ★★★★☆ 4.3 Freemium Code Assistants Simpler hosted LLM proxy with cost tracking, less evals focus