Best AI Document Review Tools. Top-7 Apps + Comparison

We found the top AI document analysis tools in as of September 2025. Find what platform is best for document review, summarization, and reading PDF files.

11 min read
Updated: 09/25/2025
Fact Checked

Introduction, AI in Document Review

Many have thought tech would make work with documents much easier, and it did. But, there are now even more piles of documents, texts, spreadsheets and many of them need to be analyzed and reviewed. Sometimes, it can be you who needs to do this.

After testing a lot of AI chatbots that do document review, I can say for sure: AI boom has already made document review much more simple, and can save a lot of time. AI tools can now analyze, summarize, compare PDFs, spreadsheets, images, even text files.

Table of contents

Here are the major points I would like to dicuss next.

1. All-in-One Tools for Document Review
   • Writingmate: All-In-One AI Platform
   • Perplexity: An AI App That Surfs the Web and Reads Files
2. Best AI Document Summarizers in 2025
   • Bito.ai: AI-Powered Code Review and Summarization
   • ChatGPT: Flexible Document Summarization
3. PDF AI Readers
   • Adobe Acrobat AI
   • Kami AI
4. AI Legal Document Review
   • Harvey AI
5. How to Compare AI Models for Document Review
6. Conclusion: What AI Is Best at Reviewing Files

All-in-One AI Document Review Platforms

With so many options, how do you know which AI is the best for reviewing files? I have tried and pushed to the limits at least two AI tools that can

• read and analyze documents,
• edit spreadsheets,
• review and analyze word docs, PDFs, code files, and do even more.

Writingmate: Chat With Files Using Multiple AI

When it comes to reviewing all the kinds of file types, an easiest tool to recommend is Writingmate all-in-one AI. This platform now supports 200+ LLMs like o3, o4-mini, GPT-5 and older GPT-4o variations, Claude 4 Sonnet and Claude 4.1 Opus, Gemini Pro 2.5 and Flash as well, Llama 4, many more.

Writingmate, Key Features:

Here are four features of Writingmate that will be especially useful for document review with AI.

• Multiple file types support (PDF, TXT, DOC, CSV, XLS, images, etc.)
• 200+ AI models (including most recent ones) that are available within one platform. No other subscriptions or API Keys required
• Easy document management and collaborative access in a single platform
• AI model comparison mode. Check how different LLMs deal with your documents, side-by-side.

Perplexity: AI That Analyzes the Web Search

Perplexity is an AI platform that became known for its deep reading and analyzing web information. That also means files, such as reports, research papers, and contracts. It can work with complex language and big data from the web. Perplexity works well, for example, for legal, for medical, or educational documents.

AI Document Summarizers

All of AI tools below are considered by our team to be one of the best at summarizing. They can easily save a lot of time from doing things all manually, by hand. This way, using AI to summarize long documents is very common task now.

Bito.ai: AI-Powered Code Review and Summarization

Bito.ai is a must-have instrument for software developers & code review is one of main things that it does. Not the only one though. Bito tool can also analyze technical documentation, f.e. API docs, specs, and large codebases.

ChatGPT and Easy Document Summarization

Let's say you need a handy AI tool for general document summary. ChatGPT is still a decent choice, though a bit generic and limited in some ways. It can make use of many types of files, e.g. academic papers, legal contracts, and financial reports.

AI PDF Reviewers

These AI tools below are decent for working with certain file formats. There are also specialized AI tools that can review specific document types. Like legal contracts, or research papers.

Adobe Acrobat AI and Kami AI

If you frequently handle PDFs, an AI PDF reader could be ideal. These tools are widely used by those who need to review contracts, research papers, and e-books. Those tools can summarize content, annotate, highlight, and extract important information.

AI Legal Document Review Tools

There is also a tool that works well enough with legal stuff and I tested it recently.

How to Compare AI Models for Document Review

AI document review tools are can finally let you compare various AI models. By this you now can find the right one for your exact specific need. For a lot of doc-related tasks I go straight to writingmate. It's a kind of all-in-one tool that lets you test and use over 200 top AI (with newest ones as well) side by side in a split view screen, and with an individual chatbot or agent (assistant).

Conclusion: What's the Best AI for File Review?

In 2025, AI tools for reviewing documents are more advanced than ever. Whether dealing with text files, PDFs, spreadsheets, or code, there's sure to be an AI tool that can improve your efficiency. Writingmate stands out as it lets to switch AI models like GPT-4o, Claude 3.7 Sonnet, Llama, Gemini or others, to do various tasks in easiest way possible, and supports many file formats.