Anthropic Makes Major Legal AI Play with Claude Expansion

Another week, another example of Big Tech’s inexorable march into the legal AI market.

On May 12, AI giant Anthropic—maker of Claude—announced that it was significantly expanding its suite of artificial intelligence tools for law firms and lawyers. As Reuters reported, Anthropic’s release “builds on plug-ins for Claude Cowork that the company announced in late January” and allows law firms and others to connect securely with third-party platforms via Claude for legal research, document management, and other services.

Anthropic said in a press release that the decision was based on legal industry demand. “Earlier this year we released our first legal plugin, and in the months since, legal professionals have become the most engaged Claude Cowork users of any knowledge-work function,” the company said. “We’re now building on that with a much larger set of tools.”

Multiple MCPs and Plug-Ins

In its announcement, the company said it was introducing more than 20 new model context protocol (MCP) connectors and 12 new plugins tailored to specific legal work and practice areas. An MCP is a software component that serves as a bridge between AI platforms like Claude and tools, databases, and software outside the platform.

Anthropic said Claude now has MCP connections for a laundry list of legal technology products, including:

• contract lifecycle and drafting workflows, Definely, Docusign, and Ironclad;
• deal rooms and transactions, Box and Datasite;
• document management, iManage and NetDocuments;
• expert networks and skills, Lawve AI and The L Suite;
• e-discovery and review, Consilio, Everlaw, and Relativity;
• fiduciary grade workflows, Thomson Reuters;
• legal research and case law, Legal Data Hunter, Midpage, and Trellis;
• legal AI assistants, Harvey and Solve Intelligence;
• public service workflows, BoardWIse, Courtroom5, Descrybe, and Free Law Project.

The 12 practice-area plugins cover commercial, corporate, employment, privacy, product, regulatory, AI governance, intellectual property, litigation, law students, and legal clinics, as well as the legal builder hub for custom-built AI legal tools. “Every plugin starts with a short setup interview that learns your practice: your playbook, your escalation chain, your risk calibration, your house style, so Claude’s answers are not generic but rather tailored for your team,” Anthropic said.

In addition to the MCP connections and the new plugins, Anthropic said it was partnering with the Free Law Project and the Justice Technology Association to “put legal help within reach of people who can’t currently access it.” Qualifying legal aid clinics, public defenders, and nonprofit legal services organizations will now be able to gain access to Claude at significantly discounted pricing, the company said.

A Substantial Offering

Anthropic’s move is being seen as more than a routine product announcement by industry insiders. Veteran legal technology watcher Robert Ambrogi noted that Anthropic’s first foray into the legal sector, announced in February, “rattled legal tech stocks…even though, in retrospect, it was a relatively modest legal plugin.”

The new release, however, “is considerably more substantial, touching almost every corner of the legal software market and, for the first time, naming specific practice areas as targets rather than offering generic workflow tooling,” Ambrogi wrote.

In a LinkedIn post, Cat Casey, Masters AI’s chief legal AI futurist, noted Anthropic’s assertion that “Legal became the #1 power-user job function in Claude Cowork. Over three times the usage of any other function. Over three times. Let that land.” She added that the expanded tools are “about orchestration and integration, not replication and replacement.”

Said Casey, “Claude is sitting above the stack, carrying context from bespoke legal tech tools and across Word, Outlook, and PowerPoint, already knowing your playbook before you open the file.”