# Unisson

> Unisson (YC W26) is a San Francisco startup building AI agents that act as hands-on product experts for customer-facing teams at B2B software companies. Its agents learn to use a client's product in about 15 minutes by exploring the interface and codebase, then work alongside implementation, customer success, and sales engineering teams inside Slack, email, and text to run onboarding, migrations, integrations, audits, and change management. Founded in 2026 by Varun Mathur and Tom Achache, the company charges only when its agents are actively doing work.

- **Founded:** 2026
- **Headquarters:** San Francisco, United States
- **Founders:** Varun Mathur (Co-Founder & CEO), Tom Achache (Co-Founder & CTO)
- **Team size:** 2
- **Products:** Runner, Explorer, Unisson API
- **Notable:** Accepted into Y Combinator's Winter 2026 batch., Founders shipped production AI systems at Ambient.ai and Chef Robotics before starting the company., Varun Mathur built a VLM reported to outperform Gemini 2.5 Pro on video understanding and sold into Fortune 5 companies.

## Products & services

- **Runner** — An AI agent that executes customer tasks directly inside a client's product and coordinates with other agents for complex, multi-step workflows like migrations and integrations.
- **Explorer** — An AI agent that maintains a real-time product knowledge base and answers questions grounded in live customer data, keeping documentation current automatically.
- **Unisson API** — An API that lets a client's own product and engineering teams embed Unisson's product expertise into their custom agents and workflows.

## Achievements

- Accepted into Y Combinator's Winter 2026 batch.
- Founders shipped production AI systems at Ambient.ai and Chef Robotics before starting the company.
- Varun Mathur built a VLM reported to outperform Gemini 2.5 Pro on video understanding and sold into Fortune 5 companies.
- Product deploys in ~30 minutes and agents learn a new product in ~15 minutes.

## Latest updates

- **2026-01** — Unisson joins Y Combinator's Winter 2026 batch and raises approximately $130K.
- **2026-02** — Launches publicly via Launch YC as 'the AI product specialist for customer-facing teams,' with a launch video and demo booking.

## Links

- Website: https://www.unisson.ai
- LinkedIn: https://www.linkedin.com/company/unisson-ai
- YouTube: https://youtu.be/juWshpSJ3fQ

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Profile page: https://yespress.io/unisson-yc-w26
Published by YesPress — https://yespress.io
Last updated: 2026-07-30