Alexi vs CoCounsel: pricing, features and which to choose

Alexi is a legal AI platform founded by Mark Doble and Sam Bhasin, with Toronto origins established between 2017 and 2019. It began as an evidence-backed research memo engine and now supports litigation, transactional, operational, and administrative work. Alexi announced an $11 million Series A in January 2026, bringing reported total funding above $20 million. Its customer range includes 50-lawyer boutiques and global firms with more than 500 lawyers. The company recommends Core, its secure SaaS environment, commonly for firms with 11 to 25 lawyers. Advanced is aimed at firms with at least 25 lawyers or more complex requirements. That positioning places Alexi firmly in the enterprise legal software market rather than the individual lawyer subscription market.

Alexi combines research memos, argument generation, chat, document upload, document analysis, drafting, review, chronologies, summarization, and workflow automation. A typical matter can begin with a research question or an uploaded document set. The user then receives analysis or starts a configured workflow that applies firm materials, precedents, and playbooks. Secure connectors support iManage, NetDocuments, SharePoint, OneDrive, Teams, Outlook, internal databases, and other practice systems through API based integrations. The Workflow Library, launched in September 2025, added ready to deploy litigation, transactional, and in house workflows. Firms can customize those workflows around their own precedents and playbooks. This makes Alexi more suitable for repeatable matter processes than for occasional general purpose legal questions.

Alexi fits firms that need private, firm specific legal intelligence for litigation, transactions, and document heavy work. Its main commercial weaknesses are the absence of published prices, seat limits, usage quotas, model names, detailed API terms, and a definitive public distinction between managed private cloud and an on premise package. Harvey is a close enterprise comparison with a firm oriented legal AI focus. Thomson Reuters CoCounsel and Westlaw pair AI assistance with established legal research products, while Lexis+ AI combines research and drafting with LexisNexis content. Alexi is the stronger shortlist candidate when deployment control, firm specific workflows, and large matter analysis matter more than price transparency, but firms should compare content coverage and contractual data terms before choosing it.

CoCounsel is a professional legal AI assistant made by Thomson Reuters and descended from Casetext's product of the same name. Casetext launched CoCounsel in March 2023, and Thomson Reuters announced a $650 million acquisition of Casetext that year. The product now sits across Thomson Reuters' legal portfolio rather than operating as an independent Casetext service. Thomson Reuters said in February 2026 that one million professionals across 107 countries and territories had chosen CoCounsel across legal, tax, audit, compliance, and related products. Legal users are the clearest audience, including litigators, transactional lawyers, in-house teams, and firms that already buy Westlaw or Practical Law. The acquisition brought Casetext's product expertise into Thomson Reuters, while the current offering adds licensed content and broader distribution.

A typical workflow starts with a natural-language request, an uploaded file, a connected document repository, or a Thomson Reuters research collection. Users can summarize and compare documents, extract information, identify missing provisions, prepare deposition materials, build timelines, draft text, and check contract policies. Knowledge Search can find material in a firm's own repositories, while Browse Library exposes expert-built prompts and skills. Agentic workflows handle multi-step assignments, and Deep Research gathers and synthesizes authority for a more complete answer. Outputs are designed to include citations or links where selected content supports them, but lawyers still need to check quotations, authorities, privilege, confidentiality, and final work product before relying on it. The system assists legal judgment rather than replacing professional review.

CoCounsel's strongest case is a research-heavy practice already invested in Thomson Reuters content. Its citations, document skills, repository connections, Microsoft 365 integrations, and agentic workflows can reduce switching between research and drafting tools, though outputs remain subject to legal review. Law firms should compare it with Harvey, Lexis+ AI, and Legora rather than assume the content advantage settles the decision. Independent 2025 benchmarking placed CoCounsel among the stronger tools across document tasks, while Law360 reported that some early adopters preferred Harvey or Legora for interface and workflow reasons. Privacy terms prohibit using customer prompts and content to train third-party models, with configurable retention, encryption, and zero-retention model APIs. Choose CoCounsel when Westlaw or Practical Law is central and authoritative citations matter most.