Data & AI Client: U.S. personal injury law firm
How DevRain’s Legal AI Assistant Helped a US Law Firm
LEGAL AI AI KNOWLEDGE BASE DOCUMENT SEARCH
Client
A US law firm specializing in personal injury cases had a large database of case-related documents. Their daily tasks included:
- Searching for Relevant Cases: Finding cases and documents related to their current work.
- Verifying Legal Responses: Checking if a lawyer’s response to a motion was valid by comparing it with similar past cases.
These tasks were time-consuming and required much manual effort, especially for new employees.
Solution
DevRain developed an Agentic Legal AI Assistant to simplify these daily operations:
- Answering Questions: The assistant allows users to ask questions based on the firm’s knowledge base.
- Validating Responses: Referencing existing data checks if the firm’s response is valid for a specific case.
- Collecting Feedback: The assistant gathers user feedback for review by experienced staff to improve its performance.

Challenges We Faced
While working on this project, we tackled several challenges:
- Avoiding AI Mistakes (Hallucinations): We ensured that all answers provided by the assistant were accurate and based on existing data, preventing any made-up information.
- Using Legal Terms Correctly: We made sure the assistant used all legal terminology accurately to maintain professionalism and correctness.
- Recognizing Document Types: The assistant was trained to identify documents, such as motions and motion responses, to provide appropriate assistance.
- Improving Response Quality: We continuously evaluated the assistant’s logic to enhance the quality of its responses over time.
Evaluation Process
Evaluating AI applications is essential for ongoing improvement. We used Ragas evaluation framework to:
- Run Constant Evaluations: We tested the assistant regularly using a set data set.
- Collect Metrics: Gathered data on each version of the assistant to see how changes affected performance.
- Inform Future Improvements: Used the collected data to make informed decisions on enhancing the assistant further.
Conclusion
The Legal AI Assistant developed by DevRain significantly simplified the law firm’s daily operations. It reduced the time and manual effort required for searching documents and verifying legal responses.
Technologies
The solution is based on the agentic RAG approach.
- Azure OpenAI
- LangChain (Agents & LLM orchestration) & Ragas (RAG evaluation)
- Azure AI Search
- ASP.NET
- Blazor
- Azure AI Document Intelligence
Integrations
- Microsoft Entra
- Azure Storage
- SharePoint Online
- Azure OpenAI