Braintrust
Braintrust builds an evaluation and monitoring platform for companies shipping AI features. It provides tools for testing, benchmarking, and improving LLM behavior in production. “Teams at Notion, Stripe, Zapier, Vercel, and Ramp use Braintrust to compare models, test prompts, and catch regressions — turning production data into better AI with every release.”
Warp
HR/payroll software space. They realized that every existing payroll solution was just manual work dressed up with software. Same complexity, same errors, same time drain—just with a nicer interface. Ayush and the Warp team have set out to solve this problem at its root - by building an automated platform that understands the requirements for 10,000+ tax jurisdictions _without any_ human intervention. They took a very product-centric approach to scaling - rather than over-hire and over-spend, they made sure to automate every bottleneck in their system. It seems to have worked - customers can now set up their HR, payroll, and tax compliance in just 10 minutes. They now support hundreds of customers - from 2-person startups to companies with 100s of employees - on all things payroll, tax compliance, and HR. And they, backed by $24 million (including a recently announced Series A), are hiring for 10 roles across all departments: operations, GTM, design, engineering, and more.
WorkOS
WorkOS builds tools and services for developers to help them implement authentication, identity, authorization, and overall enterprise readiness. They’ve raised $100m and have customers including OpenAI, Cursor, Perplexity, and hundreds of others.