Leading the way in professional-grade AI

Transform how you work, research, and make decisions with advanced AI powered by our trusted content and expertise

Trusted technology for a complex world

More than 500,000 global customers — including the entire Fortune 100 — rely on Thomson Reuters for the precision and transparency professionals need. We evolve alongside our customers, equipping them to meet the demands of the future.

Proprietary content and expertise

With exclusive content and insights backed by 4,500+ subject matter experts, our AI delivers precision at scale, without compromising quality.

Investment in AI

We’re investing $200M+ annually to integrate responsible AI into our products — from Westlaw to CoCounsel — making our tools smarter, faster, and more predictive.

Data security and ethical principles

Our AI is built on transparent, traceable processes, grounded in our commitment to privacy — so you can trust your data is protected at every step.

Before AI was transforming industries, Thomson Reuters was building it

For 30 years, we have been at the forefront of technological advancement, equipping professionals with trusted information and tools to deliver results.

Recent milestones in our AI journey include:

  • 2018: Westlaw Edge introduces next-gen AI search functionality
  • 2022: ThoughtTrace acquisition leads to our document intelligence feature
  • 2023: Casetext acquisition sets the stage for Westlaw Precision with CoCounsel
  • 2024: CoCounsel integrates with ONESOURCE, Safe Sign acquisition brings new legal LLMs, Materia acquisition adds agentic AI to our portfolio, and an expanded collaboration with Microsoft
  • 2025: CoCounsel expands globally as agentic AI is integrated into key tax and legal solutions

 

Meet CoCounsel

Our flagship AI innovation delivers advanced assistance for tasks like contract review, document summarization, and drafting. CoCounsel is grounded in Thomson Reuters exclusive content — not generic web results — for sourced, traceable, and professional-grade answers. 

CoCounsel powers multiple offerings as both an integrated platform and a branded experience, like CoCounsel Legal, CoCounsel Essentials, and CoCounsel Tax. In addition, some of our products feature deeply embedded, product-native AI designed specifically for their unique workflows and data. 

Professionals who rely on CoCounsel:

2,700
corporate customers use our CoCounsel family of products

91%
of professionals agree that CoCounsel helps them better understand information

61%
reduction in time needed to draft correspondence

Start your journey with CoCounsel

See how professionals are using AI from Thomson Reuters

From research and drafting to analysis and compliance, our AI solutions are changing the way professionals work and access information.

Legal research

Get comprehensive, accurate, and detailed answers for your legal questions, and gain efficiencies with AI capabilities that help find relevant case law.

Drafting and reviewing contracts

Use AI to find the best starting point for your draft, improve your clause language, instantly validate authorities, and generate custom playbooks from precedent contracts.

Case analysis

Gain actionable insights into your case documents, quickly assess similarities, identify conflicts, and extract key information for deeper understanding.

Litigation prep

Streamline tedious, time-consuming, and complex litigation work from client intake to appeals and beyond, freeing your time to focus on more rewarding strategic work.

“I felt like CoCounsel might be a game-changer for us. A task that would previously have taken an hour was completed in five minutes or less.”

Jarret Colemen
General Counsel, Century Communities

The future of professional-grade AI is here

Research and guidance

Answer complex tax and accounting questions faster with AI that searches across your internal sources and trusted Thomson Reuters content.

Drafting and review

Access AI tools to streamline the way you draft documents, review client tax returns, analyze specific tax forms, identify tax-saving opportunities, refine language to your policies, and attach supporting citations for confident sign-off.

Audit prep

Gain valuable insights from financial documents with AI that completes reviews faster, reduces manual errors, and auto-summarizes Excel workpapers so you can quickly analyze risk and develop a comprehensive plan.

Compliance and quality assurance

Promote consistency and compliance across teams with the help of AI tools that make it possible to ensure regulatory adherence and mitigate risks.

“CoCounsel was a lifesaver for us this year. We brought on more business than expected — and the only way we kept up was with CoCounsel. It took the most time-consuming part of our work — researching state requirements — and turned it into something we could trust and reuse.”

Rich Marlatt
Chief Information Officer at BLISS 1041

The future of professional-grade AI is here

Advanced analytics

Close investigations faster by using AI-powered entity resolution capabilities to confidently overcome partial and incomplete data and scoring relationships.

Faster evolution

AI-enhanced technology makes it possible to know today’s risk, anticipate potential threats, and navigate tomorrow’s challenges so you can stay a step ahead.

Rapid search capabilities

Access up-to-date public records on people and businesses, including information from the three largest credit bureaus and databases for property records, professional licenses, and court records.

Fraud detection

Use AI and advanced prediction technology to detect fraud behavior patterns and provide you with actionable, trusted analytics and results.

The future of professional-grade AI is here

Automatic updates

Get 24/7 updates so you can ensure you are current with regulatory changes across the globe, including real-time duty rate changes and new free trade agreements.

Worldwide expertise

Access a worldwide network of trade compliance experts, working around the clock to update regulatory trade data from 220 countries and territories.

Streamlined processes

Simplify your entire global trade management process with advanced tools like AI-powered classification that save time, reduce manual labor, and quickly calculate duty and tax.

Informed decisions

Advanced restricted-party screening engines reduce the rate of false positives and empower you to make the best-informed decisions for your business.

The future of professional-grade AI is here

TR Labs - Architecting what’s next

The innovation powerhouse behind our transformative AI capabilities

For over 30 years, Thomson Reuters Labs has been at the forefront of applied AI, partnering with leading academic and research institutions to move AI from breakthrough innovation to business-critical solutions — embedded directly into customer workflows. Our team of over 1,000 AI and machine learning specialists, data scientists, engineers, and designers develops patented methods and real-world tools trusted in courtrooms, boardrooms, and regulatory agencies where the stakes are highest.

Our AI is built with human oversight at its core, empowering professionals with transparent, reliable technology designed for real-world complexity and fast-moving regulatory change. We're investing in programs and training that empower 26,000 colleagues globally to leverage AI safely and ethically.

Learn more about TR Labs

Our innovation spans from generative AI to responsible AI governance, ensuring our customers stay ahead in a world of fast-moving regulatory and technical change.

Insights and guidance for responsible AI adoption

The Future of Professionals Report 2025

The Future of Professionals 2025 emphasizes the widening competitive gap between organizations with AI strategies and those that are flying blind into the AI era.

Read the report

Agentic AI 101: What your business needs to know

Explore how agentic AI moves beyond content creation to intelligent action — automating tasks, making decisions, and driving strategy. This guide equips businesses to lead the AI evolution with confidence.
Read the report

How to build a modern AI research strategy

Manual research is no longer enough. Discover how large tax firms can harness purpose-built AI to deliver faster, smarter insights — and stay ahead of the competition.
Read the blog

Frequently asked questions

How do CoCounsel offerings differ from other AI solutions at Thomson Reuters?

Thomson Reuters delivers AI through two complementary approaches to ensure customers get the right intelligence for the job — platform-wide assistance with CoCounsel and deeply embedded AI inside individual products. Same Thomson Reuters standards, different engine.

Powered by CoCounsel: Cross-workflow generative and agentic AI platform embedded in multiple Thomson Reuters projects such as CoCounsel Legal, CoCounsel Essentials, CoCounsel Tax, and CoCounsel Audit.

AI beyond CoCounsel: AI embedded directly within other products to enhance core workflows – product-native AI built specifically for that product’s data, controls, and workflows as seen in products such as CLEAR.
Does Thomson Reuters or its third parties retain user content or prompts to train their AI-based solutions or underlying large-language models large-language model's?

No. Your user content and prompts are not used to train or improve CoCounsel and associated products or LLMs used in Thomson Reuters or third-party output. 

Thomson Reuters AI third-party partners, such as OpenAI and Google, are contractually prohibited from using any customer data to train their models. Additionally, where applicable, we have established systemic controls to turn off third parties’ abuse-monitoring solutions to ensure there is no human access to Thomson Reuters customers’ data or inclusion of that data in third-party models.
What guardrails are in place to prevent bias in Thomson Reuters content?

We have developed and implemented prompting “guardrails,” ensuring our AI-based products will only produce responses from content drawn from a clearly defined and limited set of verified information, such as the human validated content from products such as Westlaw, Practical Law, and Checkpoint. This practice restricts the large language model’s ability to produce potentially objectionable content broadly sourced from the internet.

Discover all things AI at Thomson Reuters

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