Braintrust
braintrust.dev
Actively hiring
AI Agents
AI Evaluation & Observability
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Overview
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Team
11-50
employees, estimated range
Hiring now
4
open roles
Backers
3
Andreessen Horowitz, BoxGroup
Momentum
15/100
in the news
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Sep 11, 2025
On the Hacker News front page The rise of async AI programming · 123 points
2023
Founded
Tractionpublic signals, read monthly
Web presence
top 0.3%
of 133.2M domains by links, Common Crawl
Hacker News stories
15
best: 123 points
Backed byfrom the funds' portfolios and accelerator catalogs
Andreessen Horowitz 
BoxGroup 
Greylock Investors in similar startupsfunds that back the companies most like this one
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Overview
Braintrust is a San Francisco company founded in 2023 that provides evaluation and observability tooling for teams shipping large language model products. Its platform stores prompts and datasets, scores model outputs against them and tracks regressions as models and prompts change, turning AI development into a measurable engineering loop. It is used by software companies that need to compare providers and validate agents before release.
News
BrainTrust Partners Launches New Products to Accelerate AI Planning, Implementation and Return on Investment
AUSTIN, Texas, September 22, 2026--BrainTrust Partners today introduced two new AI-powered products designed to help companies identify where AI can deliver the greatest business impact and turn AI strategy into measurable results.
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Daily Research News Online no. 40356 - BrainTrust Adds AI Assessment and Measurement Tools
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Evaluating the GPT-5.6 family - Evals
I mapped the GPT-5.6 family across task families and difficulty, with an Anthropic comparison, to find the cheapest model that clears your reliability bar.
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Automate pattern discovery with Topics, now generally available - Blog
Topics reads your production AI traces and automatically clusters them into named categories, so you can go from pattern discovery to validated fix without switching tools.
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AI evaluation startup Braintrust confirms breach, tells every customer to rotate sensitive keys
Braintrust, a startup that makes an
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Encyclopedia Evalica
A complete alphabetical index of Encyclopedia Evalica terms and definitions.
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How Retool uses Loop to turn logs into AI roadmap decisions - Customers
Learn how Retool uses Loop to query production data and define their product roadmap.
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Monitoring Poor User Experiences with AI through Braintrust and Slack Alerts
Learn how to detect and alert on AI chatbot failures using Braintrust scorers and Hookdeck webhooks to Slack. Catch subtle AI failures before they impact users.
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The rise of async programming - Blog
The workflow that's changing how software gets built.
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The canonical agent architecture: A while loop with tools - Blog
Why the best AI agents are just loops that call functions.
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Tech stack
Technologies named in job postings at Braintrust over the last 12 months, by layer, with the share of postings for each.
Technologies in use
17
Postings analysed
5
Stack modernity
81/100AI adopter
Languages
Python
TypeScript
Go
Databases
ClickHouse
PostgreSQL
Cloud & platforms
Kubernetes
OpenAI
Cloudflare
AWS
AI & ML
LLM
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Full Braintrust tech stack
17 technologies · by team · pay by technology · changes · similar stacks
Growth
Hiring Momentum
61/100
Growing
Open positions
3
0 opened / 1 closed in 30 days
Median time-to-fill
30 days
faster than 41% of the market
Hiring Dynamics
+100%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Support
80% ▼
Industrial Engineering
20% ▲
Activity Timeline
Added Wi-Fi to stack
Sep 2026
New location: London
Sep 2026
Added Stripe to stack
Sep 2026
Added PostgreSQL to stack
Sep 2026
Added IAM to stack
Sep 2026
Added Go to stack
Sep 2026
Added GCP to stack
Sep 2026
Added ClickHouse to stack
Sep 2026
Added Azure to stack
Sep 2026
Added AWS to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
San Francisco
United States
HQ
10-50 est. staff
Jobs
≈ $38k – $72k per year (Estimated) • Remote (likely United Kingdom) • Full-Time • London
Python
TypeScript
Prompt Engineering
LLM
Braintrust
OpenAI
Anthropic
DevOps
Terraform
Kubernetes
Cloudflare
Wi-Fi
Management
Slack
Stripe
Apply
≈ $26k – $58k per year (Estimated) • Remote (Singapore) • Full-Time • Singapore
Python
Go
TypeScript
PostgreSQL
ClickHouse
AI/ML
LLM
Braintrust
OpenAI
DevOps
Terraform
GCP
Azure
AWS
Kubernetes
Cloudflare
IAM
Wi-Fi
Management
Stripe
Apply
Remote (likely United States) • Full-Time
Python
Go
TypeScript
PostgreSQL
ClickHouse
AI/ML
LLM
Braintrust
OpenAI
DevOps
Terraform
GCP
Azure
AWS
Kubernetes
Cloudflare
IAM
Wi-Fi
Management
Stripe
Apply