Syntracts Secures $5.3M Seed for On-Prem Contract AI

Syntracts raised $5.3 million in seed funding led by Hyperplane to scale its on-premises contract AI platform that structures legal data while keeping information secure within firms' systems.

The Washington, D.C.-based company announced the funding round on October 21, 2025, with participation from Khosla Ventures, Top Harvest Capital, Fortitude Ventures, Myriad Venture Partners, and Point72 Ventures. Syntracts provides law firms and corporate legal teams with an API-first infrastructure layer that integrates with existing workflows and AI tools without sending data to external servers.

Legal AI adoption has grown rapidly, but firms face persistent concerns about data privacy and output accuracy. Syntracts addresses these issues by running entirely on client premises using custom-trained models built from each firm's own documents. The platform cuts contract review time by 80 percent while maintaining full data control, according to the company.

Technology Approach

Syntracts uses fine-tuned small language models trained on synthetic legal data rather than relying on large language model prompting. The system trains thousands of specialized models, each focused on specific contract sections and legal language patterns. Through its API, firms pull documents from systems like iManage, NetDocs, or SharePoint, organize them into structured data, and send results back into existing tools without data leaving their environment.