At Myriad, we invest in AI native companies transforming the world’s most complex workflows. With Callidus, we’re bringing this mission to litigation.

What used to take days of manual research and writing can now be done in a fraction of the time with AI, freeing lawyers to focus on high-impact work like case strategy, client counseling, and crafting persuasive arguments. Nowhere is this shift more urgent, or more complex, than in litigation.

Historically, the legal sector has been slower to adopt new technologies as compared to other industries.  This holds true for one of the largest subsegments of legal work, litigation, which still predominantly uses incumbent software solutions originally built over a decade ago.  Rules-based and text-heavy, Litigation workflows rely on dense case law and statutory interpretation, coupled with artful and persuasive drafting, often requiring painstaking manual research and drafting.

But that’s changing. The rise of large language models (LLMs) is rapidly shifting this landscape. GenAI is moving beyond the legal hype cycle and driving real purchasing decisions across law firms, corporate legal departments, and legal service providers.

With the legal market topping $1 trillion, AI adoption in law firms surged, tripling last year as 54% of firms cited efficiency and time savings as key motivators. Yet despite this momentum, many legal workflows remain fragmented and outdated, preventing firms from scaling their impact or meeting client demands for speed and efficiency, while maintaining the need for impeccable accuracy.

Why We Invested: A Founder-Led Vision for Real Legal Impact

At Myriad, we invest in founders who are reframing problems into new categories and are building the next generation of business solutions. That’s why we’re excited to partner with Justin McCallon, CEO of Callidus Legal AI, a company building the AI operating system for litigators.

Justin brings a wealth of experience from commercial law, strategy consulting, and AI development. He practiced restructuring and M&A law, advised global enterprises at McKinsey, and drove large-scale transformation at AT&T, including launching DIRECTV’s first generative AI product. Seeing firsthand the untapped potential of genAI in litigation, he founded Callidus to transform how legal teams work.

Callidus is not just another AI tool. It’s a full-stack litigation platform that spans the entire case lifecycle, from intake and legal research to drafting, depositions, and trial preparation. It embodies “AI that keeps the lawyer in the loop,” allowing the platform to synthesize case law and to create organized, citation-rich drafts, enabling lawyers to focus on strategy rather than manual document assembly.

The Legal AI Inflection Point

Legal AI adoption is accelerating. Law firms are increasing their tech spend by up to 10% annually, as most consider these tools essential to business. Shifting client expectations and rising case complexity push firms to adopt AI-powered workflows. Yet, while experts agree that AI could eventually automate a significant share of legal work, clients have yet to see those efficiencies reflected in their invoices, challenging the billable hour model and demanding new forms of value delivery.

At the same time, even as general-purpose AI tools flood the market, many incumbents in litigation tech, especially in legal research, are struggling to keep pace. Their inability to rapidly innovate and reliance on outdated data systems have left room for more agile startups to gain ground.

Callidus Legal AI is changing that. By building a fully structured, tagged, proprietary case law database, Callidus has overcome the data barriers that keep incumbents’ information locked down. This foundation enables advanced legal retrieval, high accuracy, and scalable outputs that can withstand courtroom and negotiation scrutiny, far beyond what generic chatbot-based tools can offer.

Why Callidus Stands Out

Purpose-Built for Legal Workflows: Legal research and document drafting are among the most time-consuming tasks in litigation, often requiring 30+ hours of manual work per case. Callidus cuts this dramatically:

• Speed: Generates 30+ page litigation briefs in about 10 minutes with roughly 85% completeness.
• Accuracy: Uses multi-agent, agentic AI with layered verification to reduce hallucinations, producing court-room-ready drafts.
• Impact: Lawyers reclaim time for high-value strategy and client advocacy.

Courtroom-Grade Outputs, Beyond Chatbots: Many competitors rely on chatbot interfaces prone to incomplete or inaccurate drafts. Callidus delivers structured, citation-rich outputs for refinement, compressing what was once a week-long task into minutes.

Security and Flexibility: Callidus runs on SOC2-certified infrastructure, with AES encryption, optional PII scrubbing, and on-prem deployment for firms requiring additional control and compliance alignment.

‍Ready to Scale: With a recent $10 million funding round, Callidus is accelerating product development, expanding its team, and enhancing its platform to support a growing customer base of over 1,000 legal professionals.

‍The Future of Legal Automation with Callidus

We believe Callidus will be the gold standard for AI-powered litigation. With new capital behind them, the team is accelerating product development, expanding its engineering bench, and deepening partnerships across legal and corporate verticals.

At Myriad, our mission is to work with startups bringing breakthrough AI into the most complex, high-stakes industries. With Callidus, we’re doing just that—helping bring precision, speed, and strategy to the practice of litigation.

We’re excited to partner with Justin and the Callidus team as they build the AI operating system for litigators.