For decades, Microsoft has dominated the document software many lawyers work in. Word became a standard tool for drafting, editing and approval across office work, but it stayed a general writing product. Lawyers became some of its heaviest users, yet Microsoft never turned it into software built around legal work. Anthropic, the company behind the AI assistant Claude, is trying to take that position.
Its legal webinar centres on contract review, drafting and day-to-day document work. It highlights redlining (marking up changes to a contract), pulling out key terms, comparing documents and a first-pass review before a lawyer spends time on the file. The focus is the routine work that fills legal teams’ weeks.
The same pattern runs through the company’s legal plugin, an add-on for Claude, and through Cowork. The plugin is built for contract review, first checks on NDAs and sorting requests before full review. Cowork is presented as software that works across files, folders and applications to complete multistep tasks from start to finish.
Anthropic’s own lawyers show the effect. Its legal blog says the team built a self-service review tool that cut turnaround on marketing reviews from two or three days to 24 hours. The team also uses Claude for contract redlining and privacy assessments that used to take hours of manual work. A lawyer still reviews the final output, but the slow preparation shrinks before formal review begins.
A second case study goes further. The legal team built prototype phone-tree systems that connect staff with the right lawyer. It also built G Suite apps that track legal review status across products, replacing spreadsheets with simple, button-driven updates. Those tools sit inside the coordination, handoffs and review that decide how fast legal work moves.
That changes the competitive question in legal AI. Having the stronger model still counts, but the new question is which system lawyers open first when work begins. A tool that handles the first read, comparison and routing step sits closer to daily legal work than a general writing assistant.
Early adoption can also last, because the plugin is designed around a team’s own internal rules, preferred positions and working methods. Once clause preferences, review habits and approval logic are built into one system, switching becomes harder.
