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Braintrust is an AI evaluation and observability platform for teams building products with large language models. It helps developers create evaluation datasets, score model and prompt outputs with automated and human review, run experiments comparing different prompts and models, and monitor AI applications in production with logging and tracing. Braintrust also includes a prompt playground, an AI proxy and tools for turning production data into test cases. AI product teams use Braintrust to improve quality and ship reliable AI features.
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Recent User Report Trends for Braintrust
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What is Braintrust's current status?
All systems are operational
No active incidents reported.
Incident history: past 7 days
times in UTCToday
Yesterday
Oct 30, 2026
Oct 29, 2026
Oct 28, 2026
Oct 27, 2026
Oct 26, 2026
User Reports for Braintrust
Recent issues reported by users from around the world.
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Performance Insights
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About Braintrust & Technical Insights
What this service does and the technologies behind it.
Read the tech stack as text▾
Overview: A pragmatic, security-conscious serverless stack that leans on Vercel and AWS to deliver an AI evaluation platform without flashy niche technologies.
What stands out
- Vercel plus AWS suggests a split architecture: edge-optimized frontend and cloud-native backend for AI workloads.
- PHP in an AI-focused stack hints at legacy code, WordPress, or third-party integrations rather than core product logic.
- HSTS is a baseline security signal but important for subscription trust and compliance.
- The absence of signature technologies indicates Braintrust prioritizes proven, scalable infrastructure over differentiation.
Technologies braintrust.dev uses
- HSTS — Security header enforcing HTTPS for user sessions and subscription data.
- Amazon Web Services — Backend cloud infrastructure for AI evaluation workloads, storage, and APIs supporting the subscription platform.
- Vercel — Frontend hosting and edge delivery for Braintrust's app and marketing site, enabling fast global performance and preview deploys.
- PHP — Legacy scripting layer for select pages or third-party integrations.
How these technologies work together
- Amazon Web Services runs on Vercel — Vercel serves the frontend edge while AWS provides the scalable backend and data services for AI evaluation.
- HSTS requires Vercel — Vercel enforces HSTS headers to guarantee encrypted connections for users across its global edge network.
Trust & Safety Checks
Public registration, DNS and certificate records UptimeCard checked independently for the domain braintrust.dev.
Secure, encrypted connection
Everything sent between visitors and this site travels encrypted.
DNS managed by AWS Route 53
4 nameservers answer for this domain, so it stays reachable even if one goes offline.
Hosted by Amazon.com, Inc.
Served from professional infrastructure located in United States.
Records last verified September 2026.
How to fix Braintrust not working
Braintrust is an evaluation and observability platform for teams building with large language models. Developers use it to create test datasets, score model outputs, compare prompts and models, and monitor AI applications in production. Find your symptom below. Most problems come from an API key, an SDK version, a logging setting, or the platform itself. Never send your API keys or private customer data in a support message.
Jump to what you are seeing
Website Down
The Braintrust website does not load for you.
- Open the page in a private window and on another network.
- Check status.braintrust.dev for an active incident.
- If only your network is affected, ask IT to check the firewall.
Login Failed
Sign-in is refused.
- If the message says the password is wrong, reset it and check spam.
- Check you are using the organisation that owns the project.
- Try a private window to rule out an old session.
API Error
Calls to the Braintrust API fail or return an error.
- Check the status code. An access error usually means the key is wrong, too many calls means you should slow down, and a server error means a service-side problem.
- Confirm the key has not been revoked and is for the right organisation.
- Retry with a growing delay, and check status.braintrust.dev if several calls fail together.
SDK Issues
The SDK does not log data, or it raises an error in your code.
- Check the SDK version is supported, and that the key is set in the environment your code runs in.
- Read the error message, which usually names the setting that is missing.
- Check status.braintrust.dev, then send one test log to confirm the set-up works.
Playground Error
The prompt playground does not run a prompt, or it returns an error.
- Check the model and the key for that model are set up in the platform.
- Reload in a private window, and try a shorter prompt.
- Check status.braintrust.dev, and report the model name and the time if it stays broken.
Data Not Loading
Experiments, logs or datasets do not load, or they show no data.
- Check the project, the date range and the filters you have selected.
- Allow time for recent logs to appear, since they arrive after the request is made.
- Check status.braintrust.dev, and report the experiment name and the time if the data stays missing.
Slow Performance
Pages or experiments are slow to load.
- Narrow the experiment or the date range you are viewing.
- Try again at a quieter time of day.
- If it is slow for everyone, check status.braintrust.dev.
Still not working?
Contact your team's Braintrust administrator, or the developer who owns the project, first. For a platform-wide problem, contact Braintrust support through the help option in the platform or on its website. Have your organisation and project name, the experiment or log ID, the exact error text, the SDK version, and the time with your time zone. Never send API keys, private customer data or model prompts that contain personal details in a support message. Live incident updates are on status.braintrust.dev.
Most evaluation-platform problems come from a key, a logging setting or an SDK version, and they usually clear once that is checked. The status page shows live incidents, so you can see whether the problem is on Braintrust's side.
Frequently asked questions about Braintrust
Is Braintrust down right now?
No. Based on the latest status data on this page, Braintrust (braintrust.dev) is up and running normally. The most recent incident, "Write-up added for US data plane API incident", was resolved (last update Oct 1, 2026).
What should I do if Braintrust is not working for me?
First rule out your side: reload the page, try another browser or device, clear the cache and cookies for braintrust.dev, flush your DNS cache and turn off any VPN or proxy. Then compare with this page: if the status shows an incident, or many users reported problems in the last 48 hours, the issue is on the service's end and usually clears up without any action from you. The troubleshooting steps on this page go through each check in order.
What was the most recent Braintrust incident?
The most recent incident on record is "Write-up added for US data plane API incident", last updated on Oct 1, 2026. It has been resolved.
How many people reported problems with Braintrust recently?
No user reports about Braintrust were submitted in the last 48 hours.
How do I report a problem with Braintrust?
Use the report buttons at the top of this page, or describe the problem in the user reports section. Every report is counted in the 48-hour trend chart and helps other people see whether the problem is widespread.
Where is the official Braintrust status page?
The official status page for Braintrust is status.braintrust.dev.
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