BST Awards 2025: Best buy-side newcomer (vendor or product)—PostSig

Overview

Launched in 2024, PostSig is an AI-native system of intelligence developed specifically for the buy side. Firms depend on critical documents, especially market data licenses and non-disclosure agreements (NDAs) that govern billions in annual spend. Yet, after they are signed, they tend to “go dark” within contract lifestyle management (CLM), enterprise resource planning (ERP) and customer relationship management (CRM) systems and spreadsheets. Procurement and operations personnel/departments must protect P&L, while legal is focused on deal flow and regulation. The result is missed leverage, auto-renewals with cost escalations, billing errors, and confusion over terms. PostSig makes these documents transparent, connected and actionable.

The solution  

PostSig is the AI-native system of intelligence for post-signature contracts. Systems of record like CLMs, ERPs and CRMs are typically designed to store documents, not to understand them. PostSig ingests market data licenses and NDAs, then connects terms, amendments and invoices into a single intelligence layer. It flags costly auto-renewals, billing discrepancies and risky clauses, with every finding backed by clause-level citations. PostSig provides buy-side teams with clarity, control and relief from contract chaos.

Secret sauce  

PostSig delivers a system of intelligence that brings critical buy-side documents, including market data license agreements, NDAs and invoices together in one connected layer. Its context engine interprets and links these documents into a living map of obligations, risks and costs, surfacing renewal risks, billing discrepancies and opportunities for negotiation as actionable insights. CLMs manage signing and storage but go dark after they are signed, while generic AI is not purpose-built for capital markets and lacks the accuracy and expertise firms require.

Recent milestones

• Rapid adoption: Signed multiple buy-side clients across private equity, hedge funds and family offices within the first year of launch
• Innovation recognized: Delivered major AI innovations such as DORA Analytics and Invoice Protection and won the award for the most innovative market data project/initiative in the 2025 Inside Market Data & Inside Reference Data Awards
• Growth-backed: Raised both a pre-seed and seed round of investment in under 12 months to accelerate product development and client expansion

Future objectives

• Agentic AI: Automate workflows such as renewal prep and compliance checks.
• Ecosystem expansion: Build integrations with CLMs, CRMs and ERPs.
• New document types: Extend coverage beyond vendor and data agreements.

Why they won

PostSig is the perfect example of why WatersTechnology launched these awards back in 2007—we wanted to shine a light on some of the “invisible” day-to-day challenges facing CIOs and CTOs, and more specifically, to identify the truly outstanding technologies available to them to allow them to address those challenges, regardless of how obscure they might appear. 

Yes, it’s unlikely that front-office personnel—the industry’s traditional revenue generators—would care much about the innovation PostSig is introducing to the buy side, but that doesn’t mean it isn’t long overdue and valuable. In fact, nothing could be further from the truth, given how fiendishly difficult tracking down and staying on top of data licensing and tech vendor agreements are once they have been filed in the dark recesses of systems that aren’t fully fit for purpose.

PostSig wins this perennially competitive category thanks to its AI-native platform that transforms how buy-side firms manage their ever-growing catalogue of contracts in the wake of their signing. Launched in 2024, PostSig addresses the long-overlooked need across the buy side to make documents like market data licenses and NDAs transparent, connected, and actionable. 

Unlike traditional CLM or ERP systems that store documents without necessarily understanding them, PostSig’s context engine interprets clauses, amendments, and invoices to surface renewal risks, billing errors and negotiation opportunities—all with clause-level precision. Within its first year, PostSig achieved impressive adoption among private equity, hedge funds and family offices, proving its relevance to these diverse buy-side segments.