Top Casetext Alternatives for Legal Research in 2026
Casetext, once a standalone AI legal research platform, was acquired by Thomson Reuters in 2023. As a result, legal professionals are now seeking effective alternatives to power their research workflows. This guide covers some of the leading options available.
Quick Answer
For legal professionals seeking alternatives to the original Casetext platform, top choices include general-purpose large language models like ChatGPT and the more developer-centric OpenAI API or Anthropic API. These tools offer versatile AI capabilities that can be adapted for various legal research tasks, reflecting the evolution of AI in the legal field.
Why People Are Looking for Casetext Alternatives
Casetext, a prominent name in AI-powered legal research, underwent a significant change in 2023. Thomson Reuters acquired the company for $650 million in cash, with the deal officially closing in August of that year. This acquisition meant that Casetext's groundbreaking CoCounsel product, launched in March 2023, was subsequently rebranded and integrated into Thomson Reuters' ecosystem, specifically with Westlaw.
The standalone Casetext website has effectively been absorbed, and CoCounsel now operates as a Thomson Reuters product line. This shift has prompted many legal professionals who previously relied on the independent Casetext platform to explore other solutions that offer similar functionalities or could fill the gap left by the original platform.
Best Alternatives to Casetext
ChatGPT
ChatGPT, developed by OpenAI, is a widely recognized conversational AI model. It excels at understanding and generating human-like text, making it a versatile tool for a myriad of applications, including preliminary legal research, drafting summaries, and generating ideas for legal arguments. While it doesn't possess a specific legal database like Casetext did, its broad knowledge base and sophisticated language capabilities can support various aspects of legal work.
Lawyers and legal teams can leverage ChatGPT for tasks such as quickly understanding complex legal concepts, brainstorming case strategies, or summarizing lengthy documents. It serves as a powerful general-purpose AI assistant that, with careful prompting and verification, can enhance productivity. However, unlike the specialized CoCounsel, ChatGPT requires users to provide their own data or context for legal analysis, as it doesn't have built-in access to proprietary legal databases.
Anthropic API
For developers and firms looking to integrate advanced AI capabilities directly into their existing systems, the Anthropic API offers a robust solution. Anthropic, known for its focus on AI safety and its Claude models, provides a powerful platform for building custom AI applications. This API allows for the development of bespoke tools tailored to specific legal needs, from advanced document analysis to automated contract review.
While demanding more technical expertise to implement, the Anthropic API provides a high degree of customization and control. It's ideal for legal tech teams aiming to create in-house AI solutions that mirror or even surpass the functionalities previously offered by specialized platforms like Casetext's CoCounsel. Its emphasis on responsible AI development also offers an appealing layer of assurance for handling sensitive legal data.
OpenAI API
The OpenAI API provides direct programmatic access to OpenAI’s advanced AI models, including the GPT series. Similar to the Anthropic API, this option is designed for developers who want to build custom applications rather than use off-the-shelf software. By integrating the OpenAI API, legal firms can create tailored solutions for tasks such as natural language processing of legal documents, automated question answering, and advanced data extraction from legal texts.
The flexibility of the OpenAI API allows for the creation of highly specialized legal tools that can perform functions akin to those offered by CoCounsel, but within a firm
Frequently Asked Questions
What happened to Casetext?
Casetext was acquired by Thomson Reuters for $650 million in August 2023. Its CoCounsel product was rebranded as a Thomson Reuters offering and integrated with Westlaw, effectively discontinuing the standalone Casetext platform.
Is CoCounsel still available?
Yes, CoCounsel is still available, but it is now a Thomson Reuters product line, integrated with Westlaw. It is no longer a standalone offering from Casetext.
Why would I need alternatives if CoCounsel is still available?
Users might seek alternatives because the original Casetext standalone platform and its user experience no longer exist. The integration with Westlaw may change how CoCounsel is accessed and utilized, prompting users to explore other AI legal research tools.
What kind of legal tasks can general AI models perform?
General AI models like ChatGPT can assist with preliminary legal research, summarizing documents, drafting basic communications, brainstorming legal arguments, and understanding complex legal concepts, though they lack specialized legal databases.
Are there other specialized AI legal research tools like the original Casetext?
While the original standalone Casetext is gone, the legal tech landscape is constantly evolving. Many innovators are developing specialized AI tools for legal research, contract analysis, and case preparation. You can explore a range of options by looking at popular [AI legal research tools](/category/research) to find tools that fit your specific needs.