BriefCatch Raises $6M to Expand Its Trusted AI Legal Writing Co-Pilot

WASHINGTON – December 30, 2025 – BriefCatch, an AI-assisted platform specializing in legal writing, has announced the closing of a $6 million Series A funding round. The investment, led by software-focused growth equity firm Full In, marks a significant milestone for the company as it seeks to enhance its technology and broaden its reach within a legal profession grappling with the promises and perils of artificial intelligence.

The funding arrives at a critical juncture for the legal industry. While law firms are digitizing and adopting AI at an unprecedented rate to boost efficiency, they remain deeply concerned about the technology's reliability, data security, and ethical implications. BriefCatch aims to thread this needle by offering a tool that acts as an expert co-pilot, augmenting a lawyer's skills rather than attempting to replace their judgment.

Founded by renowned legal writing authority Ross Guberman, the platform integrates directly into Microsoft Word, providing real-time feedback based on established principles of clear and persuasive legal prose. The new capital is earmarked for accelerating product development, expanding the company's team, and reinforcing its commitment to security and user control.

Navigating AI Adoption with a Specialized Co-Pilot

The legal sector's relationship with AI is complex. While a 2024 survey showed AI tool usage by law firms jumping to 30% from 11% the previous year, significant apprehension persists. A primary fear, cited by nearly 75% of legal professionals, is the risk of AI-generated "hallucinations"—fabricated information or inaccurate case law that could have devastating consequences in a legal setting. Alongside accuracy, the confidentiality of client data remains a paramount concern, as feeding sensitive information into general-purpose AI models can create serious security vulnerabilities.

It is within this climate of cautious optimism that BriefCatch has found its footing. Instead of offering a broad, generative AI that creates documents from scratch, the platform focuses on refining and improving work drafted by lawyers. This approach keeps the legal professional firmly in control, using AI as a sophisticated editor and guide.

Elodie Dupuy, Founder and Managing Partner at Full In, highlighted this crucial distinction. "The market is undergoing a lot of change—law firms are digitizing at a rate they hadn't been before," Dupuy stated. "AI is driving much of that change, but it also comes with fear. We believe customers will see the value in BriefCatch in accelerating the learning and quality of associates' work, and as a check and balance on generative AI content that will inevitably be part of the future."

This positions BriefCatch not as a competitor to large-scale AI research platforms like those from LexisNexis or Thomson Reuters, but as a complementary tool dedicated to the final, crucial stage of crafting a polished, persuasive legal document. It addresses the demand for AI that integrates seamlessly into existing workflows while upholding the profession's rigorous standards.

The Investor Case for Niche Dominance

Full In's decision to lead the Series A round underscores a growing investor thesis: in high-stakes, complex industries, specialized AI solutions often outperform generalized ones. The legal field, with its unique terminology, ethical obligations, and reliance on precedent, is a prime example of a market where deep domain expertise is not just a benefit, but a necessity.

Dupuy elaborated on this investment philosophy, noting BriefCatch's focused vision. "We've always preferred deep subject expertise and focused product visions," she said. "That's usually the path to real value for customers and customers are the most critical stakeholders to keep happy."

The platform's expertise is anchored in the authority of its founder, Ross Guberman. A bestselling author on legal writing, Guberman's principles are the bedrock of the software's feedback engine. This direct lineage from a recognized human expert to an AI tool builds a level of trust that generic models struggle to achieve. Lawyers aren't just using an algorithm; they are, in effect, accessing a digitized version of Guberman's acclaimed methodology.

This specialized approach has allowed BriefCatch to cultivate a deeply loyal user base. "The company already has a lot of momentum, and has achieved it with modest means," Dupuy added. "Our capital and our pool of exceptional operators means we can help unlock much of the latent demand we see for this product."

Unpacking the Metrics of Trust and Loyalty

The most compelling evidence of BriefCatch's value lies in its exceptional customer metrics. The company reports a 99% customer retention rate and, even more impressively, a 100% gross retention rate among its law firm and court clients. In the Software-as-a-Service (SaaS) industry, where a median gross retention rate of 90-91% is considered strong, achieving 100% is extraordinary. It signifies that virtually no revenue is lost from the existing customer base due to churn.

Furthermore, BriefCatch boasts a 126% net revenue retention (NRR) rate. This figure, which accounts for both churn and expansion revenue from existing clients, places the company in the top tier of SaaS performers, where an NRR above 120% is considered best-in-class. This metric demonstrates that not only are customers staying, but they are also significantly expanding their use of the platform over time, a clear signal of the product's deep and growing value.

These numbers, far from being just dry statistics, tell a story of profound trust and loyalty within a notoriously discerning clientele. For law firms and courts, adopting a new technology is a decision weighed heavily against risks to quality, confidentiality, and reputation. BriefCatch's ability to retain and grow its accounts at such a high rate is a powerful testament to its efficacy and reliability, and a key factor in attracting significant growth capital.

"We're thrilled about the next phase of our AI journey: marrying my passion for first-rate legal writing with a custom AI system that delivers real, career-advancing wins for our customers," said founder Ross Guberman. He expressed gratitude to his team and to the "incredibly loyal customers—some of the most respected firms and courts in the world—who have helped us build one of the strongest net revenue retention profiles in legal tech."

With this new infusion of capital, BriefCatch is poised to deepen its unique position in the legal tech landscape, proving that in the age of AI, specialization, trust, and a relentless focus on quality are the most valuable assets of all.