Litmus

What it does

Litmus transforms your existing engineering repositories, tickets, and job descriptions into a complete, async interview pipeline. Instead of generic coding challenges, it generates technical assessments scoped to the features your team is actually shipping. Candidates work in their own IDE and terminal, and AI usage is encouraged—Litmus captures prompts from Claude Code and Copilot CLI alongside code so reviewers see how candidates truly work. The platform scores not just what candidates built, but how they built it, and integrates with Ashby, Greenhouse, and Lever for seamless candidate management.

Who it is for

Litmus is built for engineering teams and hiring managers who want to evaluate candidates based on real-world, job-relevant tasks rather than abstract algorithms. It's ideal for companies that value practical skills, collaborative building, and long-term fit. The platform is especially suited for teams using Y Combinator-style lean hiring practices, as Litmus is backed by Y Combinator.

Why it matters

Traditional technical interviews often fail to predict on-the-job performance. Litmus addresses this by creating assessments that mirror actual work: candidates build features from your own codebase, record design decisions, and present walkthroughs. This reduces false positives and negatives in hiring, and improves the candidate experience by making the process feel like a real collaboration. For companies, it means hiring people your team is excited to build with, not just candidates who ace toy problems.

Launch signal

Litmus is backed by Y Combinator and currently offers a demo to generate a live pipeline from your stack and an open role. The website indicates the product is operational and accepting bookings, but specific launch date or user metrics are not provided in the available evidence.

Brand and naming

The name "Litmus" evokes the litmus test—a simple, definitive test for a substance. This aligns with the product's promise of providing the most accurate engineering interview. The tagline "hire people who last" reinforces the focus on long-term fit. The brand positions itself as a modern, developer-friendly alternative to outdated hiring practices, with a clean, professional website that emphasizes transparency and integration.