Alternatives to Braintrust
End-to-end platform for evaluating and shipping AI products.
Braintrust ranks #4 of 8 in AI evaluation platforms, with an Alt Score of 96. It is licensed under Proprietary (platform); MIT (autoevals library), freemium from $249/month and available on the web. 13 of 13 checklist rows are verified against a public source.
Braintrust is an evaluation and observability platform for AI products, with datasets, LLM-as-judge scorers, prompt playground, and production logging.
Braintrust is built for engineering and applied-AI teams building LLM-powered products who need to trace, evaluate, and improve model behavior before and after shipping to production.
A unified platform combining tracing/observability, prompt playgrounds with versioning, dataset management, automated (LLM-as-judge) and human evaluation scorers, online production monitoring, cost and token tracking, and CI/CD regression testing, accessible via web UI and multi-language SDKs (Python, TypeScript, Go, Java, C#, Ruby).
Teams instrument their AI application with a Braintrust SDK or CLI to capture traces of model calls, tools, and retrieval steps, then curate production examples into versioned datasets, run scored experiments (offline or online) to compare prompts and models, and push evaluations into CI pipelines to catch regressions; Braintrust is offered as SaaS on all plans, with BYOC and self-hosted (data plane in your own cloud) deployment available on the Enterprise plan.
Why people leave Braintrust
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Ranked alternatives
Ordered by Alt Score. Click any score to see the breakdown.
Opik is an open-source LLM evaluation platform from Comet for tracing, evaluating, and monitoring LLM applications, with datasets, LLM-as-judge metrics, and a prompt playground.
Langfuse is an open-source LLM engineering platform providing tracing, prompt management, evaluations, datasets, and analytics for LLM applications; self-hostable or cloud.
Phoenix is an open-source observability and evaluation library from Arize AI for tracing, evaluating, and troubleshooting LLM applications, built on OpenTelemetry.
HoneyHive is an AI evaluation and observability platform for testing, tracing, and monitoring LLM applications, with datasets, LLM-as-judge evaluators, and human review.
LangSmith is a platform for debugging, testing, evaluating, and monitoring LLM applications, with tracing, datasets, and LLM-as-judge evaluations.
Weave is the Weights & Biases toolkit for tracking, evaluating, and monitoring LLM applications, with tracing, scorers, and experiment comparison.
Feature comparison
Rows come from the AI evaluation platforms checklist (17 rows). Human-verified cells only. ? means the value has not been verified.
| AI evaluation platforms checklist | Braintrust | Comet Opik | Langfuse | Arize Phoenix | HoneyHive | LangSmith |
|---|---|---|---|---|---|---|
| Pricing model | ||||||
| Starts at | ||||||
| License | ||||||
| Platforms | ||||||
| Open source | ||||||
| Self-hostable | ||||||
| Tracing / observability | ||||||
| Prompt playground & versioning | ||||||
| Dataset management | ||||||
| LLM-as-judge evals | ||||||
| Human annotation / review | ||||||
| Online (production) monitoring | ||||||
| A/B experiments | ||||||
| CI / regression testing | ||||||
| Cost & token tracking | ||||||
| Framework-agnostic SDK | ||||||
| Free tier |
Every fact and feature listed for Braintrust is verified against its own pages. Each alternative is sourced on its own page.
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Starts at $249/month verified 2026-07-17
Cheapest paid tier; a $0 Starter free tier also exists.
Pro (\$249/month) — Everything in Starter, plus advanced observability, security features, and higher usage limits.
https://www.braintrust.dev/docs/plans-and-limits -
Platforms Web verified 2026-07-17
Braintrust is accessed via a web application, with SDKs/CLI (Python, TypeScript, Go, Java, C#, Ruby) for instrumentation; no native desktop or mobile clients.
The control plane provides the web UI, authentication, user management, and metadata storage (project names, experiment names, organization settings).
https://braintrust.dev/docs/admin/self-hosting/index.md -
Status active verified 2026-07-17
July 2026"> ### Extended data retention ... ### GLM-5.2 ... ### Skip non-applicable cases in LLM-as-a-judge scorers" — Changelog shows shipped feature updates dated July 2026.
<Update label=
https://braintrust.dev/docs/changelog.md -
License Proprietary (platform); MIT (autoevals library) verified 2026-07-17
The Braintrust platform (SaaS/self-hosted product) is proprietary and requires a paid or free-tier account; only its companion evaluation library, autoevals, is released under the MIT license.
MIT License Copyright (c) 2023 BrainTrust Data
https://github.com/braintrustdata/autoevals/blob/main/LICENSE -
Pricing model Freemium verified 2026-07-17
Free Starter plan plus paid Pro ($249/mo) and custom Enterprise tiers, with on-demand usage overage charges beyond included limits.
Starter (\$0 platform fee) — Start building and evaluating AI applications for free with generous usage limits. No credit card required. ... Pro (\$249/month) — Everything in Starter, plus advanced ob
https://www.braintrust.dev/docs/plans-and-limits -
Open source Partial verified 2026-07-17
The hosted/self-hosted Braintrust platform itself is closed-source and requires an account; only Braintrust's companion scorer library, autoevals, is open source (MIT).
MIT License Copyright (c) 2023 BrainTrust Data
https://github.com/braintrustdata/autoevals/blob/main/LICENSE -
Self-hostable Yes verified 2026-07-17
Self-hosted and BYOC deployments (data plane in your own cloud) require the Enterprise plan.
Braintrust offers a self-hosted deployment option that separates data storage from platform management. You deploy and control the infrastructure that stores your sensitive AI data, while Braintrust p
https://braintrust.dev/docs/admin/self-hosting/index.md -
Tracing / observability Yes verified 2026-07-17
Instrument your AI application with a coding agent and verify that traces appear in Braintrust.
https://braintrust.dev/docs/tracing-quickstart.md -
Prompt playground & versioning Yes verified 2026-07-17
Playgrounds provide a no-code workspace for rapidly iterating on prompts, models, scorers, and datasets. Run full evaluations in real-time, compare results side-by-side, and share configurations with
https://braintrust.dev/docs/evaluate/playgrounds.md -
Dataset management Yes verified 2026-07-17
Datasets are versioned collections of test cases that you use to run evaluations and track improvements over time. Build datasets from production logs, user feedback, manual curation, or generate them
https://braintrust.dev/docs/annotate/datasets/index.md -
LLM-as-judge evals Yes verified 2026-07-17
LLM-as-a-judge scorers and classifiers use a language model to evaluate outputs based on natural language criteria. A scorer returns a numeric score, while a classifier returns a categorical label.
https://braintrust.dev/docs/evaluate/llm-as-a-judge.md -
Human annotation / review Yes verified 2026-07-17
Human review is a critical part of evaluating AI applications. While Braintrust helps you automatically evaluate AI software with scorers, human feedback provides essential ground truth and quality as
https://braintrust.dev/docs/annotate/human-review.md -
Online (production) monitoring Yes verified 2026-07-17
Online scoring evaluates production traces automatically as they're logged, running evaluations asynchronously in the background to provide continuous quality monitoring without affecting your applica
https://braintrust.dev/docs/evaluate/score-online.md -
A/B experiments Yes verified 2026-07-17
Braintrust's 'experiments' comparison view lets teams run two prompt/model variants against a dataset and compare quality and cost side by side.
Open the comparison view to analyze two experiments side by side. Read chain-of-thought reasoning, spot score differences, and compare token costs.
https://www.braintrust.dev/foundations/comparing-experiments -
CI / regression testing Yes verified 2026-07-17
Run in CI/CD Integrate evaluations into your CI/CD pipeline to catch regressions before they reach production. ### GitHub Actions Use the `braintrustdata/eval-action` to run evaluations on every pu
https://braintrust.dev/docs/evaluate/run-evaluations.md -
Cost & token tracking Yes verified 2026-07-17
Cost charts estimate spending based on model pricing. Costs are calculated from: Token counts (prompt, completion, and cache tokens), Model pricing rates, Provider-specific pricing tiers
https://braintrust.dev/docs/deploy/monitor.md -
Framework-agnostic SDK Yes verified 2026-07-17
SDKs exist for Python, TypeScript, Go, Java, C#, and Ruby, with tracing integrations for LangChain, LlamaIndex, CrewAI, AutoGen, OpenAI Agents SDK, LiteLLM, OpenTelemetry, and more.
Integrate Braintrust with popular AI frameworks and infrastructure tools for automatic tracing. These integrations capture spans from chains, workflows, and API calls without manual instrumentation.
https://braintrust.dev/docs/integrations/sdk-integrations/index.md -
Free tier Yes verified 2026-07-17
Starter (\$0 platform fee) — Start building and evaluating AI applications for free with generous usage limits. No credit card required.
https://www.braintrust.dev/docs/plans-and-limits
FAQ
Yes. Arize Phoenix, HoneyHive and LangSmith have a free tier or are fully free. Free-tier limits in the comparison table are verified and dated.
Comet Opik, Langfuse and Arize Phoenix — every license claim links its source.