PostSig Raises $4.1 Million to Power AI-Native Intelligence Layer for Business Documents

SAN FRANCISCO, September 16, 2025 - PostSig, the AI-native system of intelligence for critical business documents, today announced it has raised $4.1 million in Seed funding to accelerate its mission to turn signed agreements into real-time, actionable intelligence. The round was led by Differential Ventures, with participation from Tandem Ventures, Denver Ventures, and follow-on investments from Frontier Venture Capital, Unbound Ventures, and SaaS Ventures.

PostSig transforms static contracts into a dynamic system of intelligence, enabling businesses to identify risks, discover missed opportunities, and stay compliant. The platform ingests contracts, interprets them in context, and connects them into a live network of obligations, rights, risks, and costs.

"PostSig surfaces the contract details we used to hunt down manually, helping us identify potential issues, make informed decisions, and stay on top of renewals and risk. It's made our process faster and more reliable," said Gary Glasser, Managing Director, Data Science at Birch Hill Equity Partners, which relies on PostSig to manage its portfolio of critical agreements across the firm.

Capital markets are PostSig's first focus, where the complexity and consequences of poorly managed agreements are felt most acutely. Data licenses dictate how firms access and use financial information-terms that, if misinterpreted or breached, can result in regulatory violations or millions in overpayment. These contracts often remain disconnected from operational systems, leaving teams in finance, legal, procurement, and compliance unable to enforce terms or control costs.

"PostSig is building what every enterprise will need in the AI era: a system of intelligence that activates what's buried in contracts and turns it into performance-ready insight," said Nick Adams, Managing Partner at Differential Ventures, who joins PostSig's Board of Directors. "They've already shown what this looks like in capital markets - one of the most unforgiving environments for vendor risk and regulatory pressure - and they're just getting started."

That clarity and control are exactly why PostSig was named WatersTechnology's 2025 Most Innovative Market Data Initiative. In just its first two quarters since launching sales, PostSig has already helped manage over $50 million in contract value across leading hedge funds, private equity, and asset managers. The platform equips teams with AI purpose-built for contract performance, helping them catch billing discrepancies early, prepare for renewals with the leverage that comes from complete visibility, and meet compliance obligations. It's a clear, high-impact way to put AI to work where it complements expertise and drives measurable results.

With this funding, PostSig will expand product capabilities, grow into adjacent verticals, and scale its go-to-market, continuing its mission to transform how enterprises turn contracts into intelligence and performance.

About PostSig

PostSig is the AI-native system of intelligence for critical business documents. Purpose-built to understand and activate the data inside complex agreements, PostSig helps organizations track obligations, detect risks, and drive performance across legal, finance, procurement, compliance, and operations.

To learn more, visit https://postsig.com

Source: PostSig