TL;DR: You can turn any PDF into an AI chatbot that answers questions from your documents. Boei lets you upload PDFs, train an AI agent on the content, and deploy it on your website or WhatsApp in under 10 minutes. Pricing starts at $11/mo. Alternatives like Chatbase ($40/mo) and CustomGPT ($89/mo) offer similar features but cost more and lack multichannel deployment.
Your company already has the answers to most customer questions. They are sitting in product manuals, HR handbooks, support documentation, and training materials. The problem is that nobody reads them. An AI chatbot trained on your PDFs can surface those answers instantly, 24/7, without your team lifting a finger.
This guide walks you through turning your existing PDF knowledge base into a working AI chatbot. We will cover which tools to use, how the technology works behind the scenes, and practical tips for getting better answers from your documents.
PDFs are the most common format for business documentation. Think about what your company already has:
All of this content is already written, reviewed, and approved. Instead of manually copying it into a chatbot builder question by question, you can upload the PDFs directly and let AI handle the rest.
The result is an AI agent that can answer questions like "What is the return policy for international orders?" or "How do I reset the firmware on model X?" by pulling the exact information from your documents.
When you upload a PDF to an AI chatbot platform, a few things happen behind the scenes. Understanding this process helps you get better results.
The platform extracts all readable text from your PDF. This includes headings, paragraphs, tables, and lists. Most platforms handle standard text-based PDFs well. Scanned PDFs (essentially images) require OCR (optical character recognition) first, which some platforms include and others do not.
The extracted text gets split into smaller pieces called "chunks." Think of it like cutting a book into paragraphs. Each chunk is small enough for the AI to process but large enough to retain context.
Why does this matter? If your PDF has a 50-page product manual, the AI does not read all 50 pages for every question. It finds the most relevant chunks and focuses on those. Good chunking means better answers. Bad chunking means the AI might miss important context or combine unrelated information.
Each chunk gets converted into a mathematical representation (called an embedding) that captures its meaning. These embeddings are stored in a vector database. When someone asks a question, the system converts the question into an embedding too, then finds the chunks with the closest meaning.
The AI reads the most relevant chunks and generates a natural language answer. It cites the source material, so users can verify the information. This is called Retrieval-Augmented Generation (RAG), and it is the standard approach for document-based AI chatbots.
The key benefit: the AI only answers based on your documents. It will not make up information or pull from general internet knowledge. If the answer is not in your PDFs, the chatbot says so.
Boei makes it straightforward to go from PDF to working chatbot. Here is the process:
Sign up for Boei (7-day free trial, no credit card required) and create a new AI agent. Give it a name and set the tone of voice. You can make it formal for legal documents or conversational for customer support.
Go to the training section and upload your PDF files. Boei supports multiple PDFs per agent, so you can combine your product manual, FAQ document, and support guides into one chatbot. The platform extracts the text, chunks it, and indexes it automatically.
You can also train on website pages, plain text, and other document formats alongside your PDFs. This lets you build a comprehensive knowledge base from multiple sources. Learn more about all supported formats on the document training page.
Use the built-in chat preview to test questions against your documents. Ask the kinds of questions your customers or employees would ask. Check that the answers are accurate and that the chatbot cites the right sections.
If certain answers are not accurate enough, you can add custom instructions to guide the AI. For example: "When asked about pricing, always mention the current promotion" or "If the user asks about warranty claims, direct them to the support email."
Add the Boei widget to your website with a single line of code. The chatbot appears as a chat button that visitors can click to ask questions. It works on any website platform: WordPress, Shopify, Wix, Squarespace, or custom-built sites.
With Boei, the same AI agent that answers questions on your website can also respond on WhatsApp and email. Customers send a WhatsApp message, the AI reads their question, searches your PDFs, and replies automatically. No extra setup required.
This multichannel approach means your PDF knowledge base is accessible everywhere your customers are, not just on your website.
Ready to turn your PDFs into an AI chatbot? Start your free 7-day trial and upload your first document in minutes. No credit card needed.
Not all PDFs are created equal when it comes to AI training. Here are practical tips to get the most out of your documents.
High performers:
Lower performers:
If you have the ability to update your source documents, these changes improve AI performance:
When training on several documents, keep these principles in mind:
Here is how the main options compare for building an AI chatbot from PDFs.
| Feature | Boei | ChatGPT | Chatbase | CustomGPT |
|---|---|---|---|---|
| PDF upload | Yes | Yes (per session) | Yes | Yes |
| Multiple PDFs per bot | Yes | No (single conversation) | Yes | Yes |
| Website widget | Yes | No | Yes | Yes |
| WhatsApp deployment | Yes | No | No | No |
| Email auto-reply | Yes | No | No | No |
| Starting price | $11/mo | $20/mo (Plus) | $40/mo | $89/mo |
| Free trial | 7 days | Limited free tier | 20 messages | 7 days |
| Source citations | Yes | Yes | Yes | Yes |
| Custom instructions | Yes | Yes (system prompt) | Yes | Yes |
| GDPR compliant | Yes (EU-based) | No (US-based) | No (US-based) | No (US-based) |
Boei is an AI agent platform used by 17,000+ businesses. Upload your PDFs, and the AI trains on the content automatically. The standout feature is multichannel deployment: the same AI agent works on your website, WhatsApp, email, and SMS. Pricing starts at $11/mo on the Lite plan with 100 training pages. The Growth plan ($49/mo) supports 3,500 training pages, which covers most document libraries.
Boei is EU-based and GDPR compliant, which matters if your PDFs contain customer data or employee information. The platform also supports website scraping, plain text, CSV, and Google Sheets as training sources alongside PDFs. Check all AI chatbot features for a complete overview.
ChatGPT lets you upload PDFs and ask questions in a conversation. It works well for personal use, but it is not designed for customer-facing chatbots. There is no website widget, no way to share the trained chatbot with your team or customers, and each conversation is isolated. Upload a PDF in one chat, and the next chat does not know about it.
For internal research or one-off document analysis, ChatGPT is useful. For building a chatbot that customers interact with on your website, it is not the right tool.
Chatbase is a chatbot builder that supports PDF training. Upload documents, customize the chatbot appearance, and embed it on your website. The Hobby plan starts at $40/mo with 2,000 message credits and 5M character training data. It uses a credit-based pricing model where premium AI models consume more credits per response.
Chatbase is website-only. There is no WhatsApp or email integration. If you need multichannel support, you will need additional tools.
CustomGPT focuses specifically on building chatbots from documents. It supports PDFs, websites, and other file types. The Standard plan starts at $89/mo with 1,000 pages and 5,000 queries per month. It includes a website widget and API access.
CustomGPT is more expensive than alternatives and primarily targets enterprise use cases. The platform offers strong document processing capabilities but lacks the multichannel deployment that smaller businesses often need.
Boei handles PDFs, websites, and spreadsheets in one platform. Try it free for 7 days and see how your documents perform as an AI chatbot.
Upload your support documentation, FAQ pages, and troubleshooting guides. The AI chatbot handles common questions instantly, reducing ticket volume. When it cannot answer, it collects the customer's contact details and routes the conversation to your team. This speed-to-lead approach means customers get immediate responses even outside business hours.
Upload employee handbooks, policy documents, benefits guides, and onboarding materials. New employees can ask "How many vacation days do I get in my first year?" and get an instant answer instead of waiting for HR to respond. Deploy it on an internal page or through a shared WhatsApp number.
Upload product manuals, spec sheets, and installation guides. Customers shopping on your website can ask "Does model X support Bluetooth?" and get an answer pulled directly from the product manual. This reduces pre-sale questions and helps customers make buying decisions faster.
Upload terms of service, privacy policies, and compliance documentation. Internal teams can quickly check "What is our data retention policy for EU customers?" without searching through multiple documents. This is particularly useful for teams that need to reference policies frequently.
Upload training materials, course content, and certification guides. Students or trainees can ask questions about the material and get AI-powered answers with source references. This works well as a study companion or quick reference tool.
The cost of running a PDF-based chatbot depends on two factors: how much content you need to train on and how many conversations your chatbot handles.
| Plan | Boei | Chatbase | CustomGPT |
|---|---|---|---|
| Entry-level | $11/mo (100 pages) | $40/mo (5M chars) | $89/mo (1,000 pages) |
| Mid-tier | $49/mo (3,500 pages) | $100/mo (10M chars) | $299/mo (5,000 pages) |
| Channels included | Web + WhatsApp + Email | Web only | Web + API |
| Overage pricing | $9/mo per 1K AI credits | $12-14 per 1K credits | Custom |
For most small businesses with a handful of PDFs totaling under 100 pages, Boei's Lite plan at $11/mo covers the basics. Growing businesses with larger document libraries will find the Growth plan at $49/mo sufficient for up to 3,500 training pages. See full pricing details.
It depends on the platform and your plan. Boei's Lite plan supports 100 training pages, while the Growth plan handles 3,500 pages. Most platforms measure by total content size rather than number of files, so one 100-page PDF counts the same as ten 10-page PDFs.
Scanned PDFs need OCR (optical character recognition) to convert images to text first. Some platforms handle this automatically, while others require you to run OCR separately before uploading. Text-based PDFs (created digitally, not scanned) always work better.
A well-configured AI chatbot will only answer based on the documents you provide. If someone asks a question that is not covered, the chatbot should say it does not have that information and offer to connect the user with a human. This prevents hallucinated answers.
Accuracy depends on the quality of your source documents and how well they are structured. Well-organized PDFs with clear headings and focused paragraphs produce highly accurate answers. Boei includes source citations so users can verify the information themselves.
Yes. Upload new versions of your documents, and the AI retrains on the updated content. With Boei, you can add, remove, or replace training documents at any time without rebuilding the chatbot.
Look for platforms that offer encryption at rest and in transit, data isolation between accounts, and GDPR compliance if you handle EU data. Boei is EU-based and GDPR compliant. Your documents are used only for training your chatbot and are not shared with other users or used to train general AI models.
With Boei, you can go from PDF upload to live chatbot in under 10 minutes. Upload your documents, test a few questions, and deploy the widget on your site. More complex setups with multiple documents and custom instructions might take 30 minutes to an hour.
If your PDFs are in multiple languages, the AI can answer in those languages. Boei supports multilingual conversations, so a visitor can ask a question in Spanish and get an answer from an English PDF, translated automatically.
Turn your PDFs into an AI employee that works 24/7. Start free with Boei and deploy on your website, WhatsApp, and email in minutes. Plans start at $11/mo.
Article by
Ruben is the founder of Boei, with 12+ years of experience in conversion optimization. Former IT consultant at Ernst & Young and Accenture, where he helped product teams at Shell, ING, Rabobank, Aegon, NN, and AirFrance/KLM optimize their digital experiences. Now building tools to help businesses convert more website visitors into customers.
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