Fuse AI

Fuse AI develops an outbound sales platform for revenue teams, founders and RevOps staff. Instead of combining a contact database, enrichment tools, signal providers and a sequencing tool, users work in one system where AI agents search a database of hundreds of millions of contacts, enrich records through dozens of data providers, and watch accounts for buying signals. Qualified prospects are then engaged through automated email, LinkedIn and dialing workflows, and CRM records can be kept up to date in the background. The platform also connects to assistants such as Claude through an MCP server so agents can run sales workflows. The company is based in San Francisco and was part of Y Combinator's Winter 2025 batch.