Tools
Arize AX vs Braintrust
Arize AX or Braintrust? Their plans monthly and yearly, the capabilities their makers state, security and latest updates, side by side — read from the makers' own pages.
In short
- Both: Self-hosted, Traces and evaluates
- Only Arize AX states: Runs commands, Command line
- Only Braintrust states: Choice of models, API, Official SDKs
Arize AX
Arize AX traces, evaluates, and improves AI agents and applications using observability, issue detection, experiments, and managed agents.
Plans
AX Free
Free
- 10 issues per month
- 25k spans per month
- 1 GB per month
- 15 days retention
- SaaS deployment
- Unlimited users and evals
AX Pro
- $50 per month
- 25 issues per month
- 50k spans per month
- 10 GB per month
- 30 days retention
- SaaS deployment
- Unlimited users and evals
AX Enterprise
Price on request
- Unlimited signal issues
- Custom span volume
- Custom ingestion volume
- Custom retention
- SaaS or self-hosted deployment
- Unlimited users and evals
Prices checked 2026-09-25 on the maker’s page.
Capabilities
- Runs commands — “Start in your terminal” source
- Command line — “Start in your terminal” source
- Self-hosted — “SaaS or Self-Hosted” source
- Traces and evaluates — “The agent observability and evaluation platform.” source
Security
- SOC 2 Type II — “Arize AI Announces SOC 2 Type II Certification” source
- SOC 2 — “Arize AI Announces SOC 2 Type II Certification” source
- ISO 27001 — “ISO/IEC 27001 Certified” source
- GDPR — “GDPR Compliant” source
- HIPAA — “HIPAA Compliant” source
- Data kept in the EU — “Arize AI: Support for EU Data Residency” source
Latest updates
- Get Alyx help tailored to your experience
Alyx adapts how it helps based on your experience level in each part of Arize AX.
- Pick up where you left off with Alyx long-term memory
Alyx remembers durable context across conversations, including your preferences, ongoing goals, project and asset learnings, team conventions, and important decisions.
- Add and annotate entire sessions and traces in annotation queues
You can send full multi-turn sessions and complete traces to an annotation queue and review them at session or trace granularity.
Braintrust
Braintrust helps teams trace AI applications, evaluate outputs, find production issues, and improve agents.
Plans
Starter
- $0 / month
- + $4/GB
- + $2.50/1k
- $10 model credits/month included
- 1 GB processed data/month included
- 10K scores/month included
- 14-day retention
- Unlimited users, projects, datasets, playgrounds, and experiments
Pro
- $249 / month
- + $3/GB
- + $1.50/1k
- + $0.50/GB/mo
- $100 model credits/month included
- 5 GB processed data/month included
- 50K scores/month included
- 30-day retention
- Custom charts, environments, priority support, and RBAC
- Unlimited users, projects, datasets, playgrounds, and experiments
Enterprise
Price on request
- Custom data retention and export
- RBAC and premium support
- On-prem or hosted deployment for high-volume or privacy-sensitive data
Prices checked 2026-09-26 on the maker’s page.
Capabilities
- Choice of models — “compare prompts and models side-by-side” source
- Self-hosted — “Deploy Brainstore data plane on your own infrastructure” source
- API — “You get a unified API across OpenAI, Anthropic, Google, AWS, and other providers, with automatic caching and observability on every request.” source
- Official SDKs — “Native SDKs SDKs for Python, TypeScript, Go, Ruby, C#, and more.” source
- Traces and evaluates — “Full visibility into every agent interaction.” source
Security
- SOC 2 Type II — “SOC 2 Type II - May 5 - Aug 5, 2025” source
- SOC 2 — “SOC 2 Type II - May 5 - Aug 5, 2025” source
- GDPR — “Data Processing Agreement (DPA) - Enterprise” source
- HIPAA — “One-page white paper on Braintrust and HIPAA compliance.” source
Latest updates
- September 2026 (v0.21.0+)
Braintrust-hosted deployments map OpenInference traces to structured data; the bt CLI supports local JavaScript span plugins.
- August 2026
Monitoring views became dashboards; permissions now control access to organization AI providers; coding-agent tracing runs through the bt CLI.
- July 2026
Experiment comparisons support pairwise scoring; datasets can store references to full traces and show them in a Trace viewer.