With the boom of technology and business, people are dealing with more and more documents each day. But AI boom, in turn, made document review much more simple and efficient. AI tools can now analyze, summarize, and compare PDFs, spreadsheets, images, and text files.

My name is Artem and in recent years I had to analyze and review thousands of documents. AI tools helped me to save a lot of time, and I have tested several of them. So, not only has digital world made us to work and review documents more, it also gives us some tools to review documents with AI and to make all document-related workflow way faster and more efficient. AI tools that we are going to list below are not just quick and accurate; they also try their best to keep your data private. In this guide article, we’ll look at the best AI tools for document review in 2025 and see if they can really simplify your workflow.

Table of contents

1. Introduction: The Evolution of AI in Document Review

2. All-in-One Tools for Document Review

   • Writingmate: All-In-One AI Platform

   • Perplexity: An AI App That Surfs the Web and Reads Files

3. Best AI Document Summarizers in 2025

   • Bito.ai: AI-Powered Code Review and Summarization

   • ChatGPT: Flexible Document Summarization

4. PDF AI Readers

   • Adobe Acrobat AI

   • Kami AI

5. How to Compare AI Models for Document Review

6. Conclusion: What AI Is Best at Reviewing Files

All-in-One Tools for Document Review

With so many options, how do you know which AI is the best for reviewing files? First, Let's explore two AI tools that can read and analyze documents, spreadsheets, word, PDFs, code files, and do even more. One of them uses multiple AI models and the other one is like a file encyclopedia.

Writingmate: Why Limit Yourself to a Single AI?

When it comes to reviewing all the kinds of file types, Writingmate.ai stands out as one of the most useful, simple and efficient options. This platform supports a huge variety of diverse AI models, including GPT-4o, Claude, Mistral, and LLaMA, among others. This allows you to compare how different models work with numerous file formats like PDFs, DOCs, images, TXT files, and so much more. All inside one single chatbot!

Key Features of Writingmate:

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.);

• 100+ AI models (including most recent ones) that are avaliable through one platform for reviewing and comparing files. No other subscriptions or API Keys required;

• Advanced document summarization and insight generation;

• Easy document management and collaborative access in a single platform.

Example Use Case:

Imagine that you have a massive PDF report. ChatLabs can summarize it with one model, like GPT-4o. Then, it can generate key insights with another, such as Claude 3.7 Sonnet, Gemini 3 Pro or Llama 4, all within the same tool, same simple web app. You have ability to analyze large datasets when you upload Excel or CSV files - this makes it great for both text and data-heavy document reviews.

Try it here: https://writingmate.ai

Perplexity: An AI App That Surfs the Web and Reads Files

Perplexity is an unusual AI platform that became known for its reading and analyzing text-heavy information. That also means files, such as reports, research papers, and contracts. It can work with complex language and big data of web. Perplexity works well, for example, for legal, for medical, for educational documents. Perplexity's AI Model is also avaliable through Writingmate.

This tool actually supports a variety of formats: DOC, PDF, EXCEL, TXT, and is good enough for professionals who need to review important documents fast and with no overlooking crucial details.

Why Perplexity Stands Out? At least, three things:

• It handles complex, heavy documents like contracts and research papers;

• It’s highly efficient at summarizing legal and academic writings;

• It works with multiple file formats like DOC and TXT, besides PDF.

Which AI Can Analyze Files Like Perplexity?

Looking for AI tools that can match Perplexity in analyzing files? Check out Gemini Pro AI and LLaMA 4 Maverick AI. These new 2025-ready models can break down complex texts, summarize and analyze data. They work well with detailed PDFs and comprehensive spreadsheets, and are also avaliable through Writingmate platform. What AI writing apps can read files like Perplexity? In brief, Writingmate does just that and integrates over a hundred best AI models with which you can write, work with texts, and analyze files. Try chatting with files on Writingmate here.

Best AI Document Summarizers in 2025

Using AI to summarize long documents is very common in 2025. So, the AI tools below are great at summarizing, they can easily save a lot of time from doing things all manually, by hand.

Bito.ai: AI-Powered Code Review and Summarization

Bito.ai is a must-have instrument for software developers, and 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. Bito.ai uses AI to highlight coding errors, suggest improvements, and summarize large chunks of code. It’s a perfect tool for software engineering teams who need to review large codebases in various efficient ways.

Bito.ai can read and analyze code files such as JSON and Python scripts, as well as entire repositories. Its integration with GitHub helps you incorporate AI into any kind of code work that you do.

Why Use Bito for Code Review

• Works with different programming languages and formats like JSON and Python.

• Spots coding mistakes, gives fixes. Is quite accurate in my experience.

• Breaks down big code files into easy-to-understand summaries.

ChatGPT and Easy Document Summarization

Let's say you need a handy AI tool for summarizing documents. ChatGPT is a decent choice, though a bit generic and limited in many ways. It can make use of many types of files, f.e. academic papers, legal contracts, and financial reports. ChatGPT will provide quick, concise summaries, pick certain data from documents and even give you new documents for download if you have a subscription an user cap is high for you.

It also has a conversational style that i usually easy to understand. That applies to any AI chatbot that is based on OpenAI technologies. ChatGPT is only a user interface for best openAI models, and you can pick it if you want to go with a default option.

Key Features of ChatGPT for Document Review:

• Summarizes varous file types (PDFs, DOCs, spreadsheets);

• Makes summaries that are easy to comprehend and that are readable.

• Works with complex professional writing styles, it can do legal, academic, and financial documents;

• ChatGPT is also avaliable on Writingmate, almost no GPT limits starting at $10.

Here is a link to original OpenAI chatbot: https://chat.openai.com

Tools that Analyze PDF: AI Review and Summarization

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

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.

Tools like Adobe Acrobat AI and Kami AI are some of the best PDF AI readers in 2025. These tools will be vety helpful for reviewing long, complex PDFs and extracting essential information.

3 Key Benefits of AI PDF Readers:

• Extracts key insights from long, complex PDF docs;

• Allows annotations and highlights important sections;

• Summarizes content for your easier understanding and to save time.

How to Compare AI Models for Document Review

AI document review tools are can finally let you compare various AI models. That way you can find the right one for your exact and specific needs. Take Writingmate, for example. This all-in-one tool allows you to test over 200 top AI models all in one place. You can observe and make conclusions about how well they stand against different types of challenges, various kinds of documents, code, images or other tasks.

Each model has its own strengths. Some are better with text files, while others excel with data-heavy files like Excel or CSV. By comparing them, you can easily choose the best AI model for analyzing your specific documents.

Try comparing AI models on Writingmate.

Conclusion: Choosing 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.

For text-heavy documents, you can also turn to Perplexity or generic ChatGPT user interface, which are decent if you want to summarize legal, academic, and financial documents. For developers, Bito.ai reviews and summarizes code files; and if you need to analyze PDFs, AI readers like Adobe Acrobat AI offer specialized features perfect for this format.

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See you in the next articles!

Artem