Unisson builds AI agents that act as subject-matter experts for B2B software implementation teams. The platform helps customer-facing teams in technical customer success, implementation, and sales engineering automate the work of onboarding and deploying software. Its agents can learn a product's functionality within minutes and then handle tasks such as onboarding, customer health audits, and custom integrations via Slack, text, or email. Unisson is a Y Combinator Winter 2026 company based in San Francisco.