# ChatPDF Alternatives 2027: 8 Paid, Free & Open-Source

Source: https://zekaiwork.com/alternatives/chatpdf/
Prices checked: 2026-11-12 (Zekai Price Ledger)

The best ChatPDF alternatives in 2027 are PDF.ai (best overall, $10/mo billed yearly), AskYourPDF (best free plan: 50 questions a day) and Kotaemon (best open source, Apache-2.0). ChatPDF itself starts at $7.58/mo billed yearly. Zekai checked these prices on vendor pages on 12 Nov 2026; 5 more are compared below, including 2 with a free plan and 3 open source.

| Tool | Type | Starting price | Free plan limit | Licence | Best for | Price checked | Links |
|---|---|---|---|---|---|---|---|
| ChatPDF (the tool being replaced) | — | $7.58/mo billed yearly | 2 documents a day | — | — | 2026-11-12 | [pricing](https://www.chatpdf.com/) |
| PDF.ai | Free plan + paid | $10/mo billed yearly | 1 PDF upload, 100 questions a month, 10MB file, OCR on 2 pages | — | PDF chat with a parsing API | 2026-11-12 | [site](https://pdf.ai) [pricing](https://pdf.ai/pricing) [Zekai page](https://zekaiwork.com/ai-tools/pdf-ai/) |
| AskYourPDF | Free plan + paid | $11.99/mo billed yearly | 1 document a day, 100 pages each, 50 questions a day | — | Cheap PDF chat with model choice | 2026-11-12 | [site](https://askyourpdf.com) [pricing](https://askyourpdf.com/pricing) [Zekai page](https://zekaiwork.com/ai-tools/askyourpdf/) |
| Humata | Free plan + paid | $9.99/mo | 60 free pages, 1 user | — | Page-metered Q&A for small teams | 2026-11-12 | [site](https://www.humata.ai) [pricing](https://www.humata.ai/pricing) [Zekai page](https://zekaiwork.com/ai-tools/humata/) |
| NotebookLM | Free plan + paid | $19.99/mo | 100 notebooks, 50 sources per notebook | — | Source-grounded notebooks from your files | 2026-11-12 | [site](https://notebooklm.google) [pricing](https://one.google.com/about/google-ai-plans/) [Zekai page](https://zekaiwork.com/ai-tools/notebooklm/) |
| Kotaemon | Open source | Free (self-hosted) | No limit (self-hosted) | Apache-2.0 | Self-hosted RAG chat for documents | 2026-11-12 | [code](https://github.com/Cinnamon/kotaemon) [Zekai page](https://zekaiwork.com/ai-tools/kotaemon/) |
| Open WebUI | Open source | Free (self-hosted) | No limit (self-hosted) | Open WebUI License (branding clause, not OSI-approved) | Self-hosted chat UI with document RAG | 2026-11-12 | [code](https://github.com/open-webui/open-webui) [Zekai page](https://zekaiwork.com/ai-tools/open-webui/) |
| Open Notebook | Open source | Free (self-hosted) | No limit (self-hosted) | MIT | Self-hosted notebook with any model | 2026-11-12 | [code](https://github.com/lfnovo/open-notebook) [Zekai page](https://zekaiwork.com/free-open-source/open-notebook/) |
| AnythingLLM | Open source | Free (self-hosted) | No limit (self-hosted) | MIT | Private document chat on your desktop | 2026-11-12 | [code](https://github.com/Mintplex-Labs/anything-llm) [Zekai page](https://zekaiwork.com/free-open-source/anythingllm/) |

## How each alternative compares with ChatPDF

- **PDF.ai** (Free plan + paid, $10/mo billed yearly, checked 2026-11-12): Pro raises the cap to 100 PDF uploads and 1,000 questions a month; Ultimate is unlimited, uses an advanced model and adds Parse, Extract and Chat APIs plus team invites. Switch if you need up to 100 PDFs, API access or invited teammates, which ChatPDF Plus does not list. Stay with ChatPDF if you mostly read single PDFs yourself and want yearly pricing below $8 a month.
- **AskYourPDF** (Free plan + paid, $11.99/mo billed yearly, checked 2026-11-12): Premium accepts documents up to 2,500 pages and 31MB, allows 1,200 questions a day and lets you choose GPT-5, Gemini 2.5 Flash, or credit-priced Claude 4.5 models. Switch if you want to pick the underlying model and ask over 1,000 questions a day. Stay with ChatPDF if you chat with a handful of PDFs a week and do not need model choice.
- **Humata** (Free plan + paid, $9.99/mo, checked 2026-11-12): Bills by pages rather than documents: Expert includes 500 pages a month then $0.02 a page, Team includes 5,000 at $0.01, and both list GPT-5 support. Switch if your volume is low enough that 500 pages a month at $9.99 beats a flat subscription. Stay with ChatPDF if you want unlimited PDFs and questions rather than a page meter.
- **NotebookLM** (Free plan + paid, $19.99/mo, checked 2026-11-12): A notebook holds up to 50 sources on the free plan, 300 on Pro and 500 or 600 on Ultra,, against 50 PDFs per ChatPDF Plus folder. Google now brands it Gemini Notebook. Switch if you want to combine dozens of mixed sources in one notebook inside a Google account. Stay with ChatPDF if you only need quick questions on one PDF and pay under $15 a month.
- **Kotaemon** (Open source, Free (self-hosted)): Runs on your own server with OpenAI, Azure, Cohere, Groq or local Ollama models, so files never reach a third-party PDF service. Switch if documents must stay on hardware you control or you want to choose your own model. Stay with ChatPDF if you do not want to run Docker or look after a server.
- **Open WebUI** (Open source, Free (self-hosted)): Self-hosted platform built to run offline, connecting Ollama or OpenAI-compatible APIs; document chat is one feature of a general chat interface. Switch if you want one self-hosted interface for many models where PDF chat is one feature. Stay with ChatPDF if you want a dedicated PDF reader with a side-by-side source view and no server.
- **Open Notebook** (Open source, Free (self-hosted)): Connects to 20-plus providers including OpenAI, Anthropic, Google, Mistral and Ollama, and runs fully local, per its README. Switch if you want a notebook workflow with your own choice of 20-plus model providers. Stay with ChatPDF if you prefer a hosted tool with a 2-document-a-day free plan and no containers.
- **AnythingLLM** (Open source, Free (self-hosted)): Ships as a desktop app for Mac, Windows and Linux with a built-in local LLM engine, so documents can be chatted with on your own computer. Switch if you want a one-click desktop install that chats with files locally. Stay with ChatPDF if you would rather work in a browser tab without installing software.

## Open-source options in detail

- **Kotaemon** (https://github.com/Cinnamon/kotaemon): Licence: Apache-2.0; Last release: 2026-05-31
- **Open WebUI** (https://github.com/open-webui/open-webui): Licence: Open WebUI License (branding clause, not OSI-approved); Last release: 2026-11-08
- **Open Notebook** (https://github.com/lfnovo/open-notebook): Licence: MIT; Last release: 2026-11-04
- **AnythingLLM** (https://github.com/Mintplex-Labs/anything-llm): Licence: MIT; Last release: 2026-10-26

## Questions

### What is the best alternative to ChatPDF in 2027?
PDF.ai is the best overall ChatPDF alternative on this page ($10/mo billed yearly). For no cost, AskYourPDF has a free plan (1 document a day, 100 pages each, 50 questions a day). To self-host, Kotaemon is open source (Apache-2.0).

### Is there a free version of ChatPDF?
Yes. ChatPDF has a free plan: 2 documents a day. Paid plans start at $7.58/mo billed yearly, checked on 12 Nov 2026.

### Is there a 100% free alternative to ChatPDF?
Yes. Kotaemon, Open WebUI, Open Notebook, AnythingLLM are open source and free to self-host. PDF.ai, AskYourPDF, Humata, NotebookLM have a free plan with limits, shown in the table.

### What is cheaper than ChatPDF?
Humata starts at $9.99/mo, against $7.58/mo billed yearly for ChatPDF, as listed on each vendor's pricing page on 12 Nov 2026.

### How much do ChatPDF alternatives cost for a team of 5?
If each of 5 people buys the entry paid plan, at the prices Zekai checked on 12 Nov 2026, the monthly cost is Humata $49.95/mo, PDF.ai $50/mo, AskYourPDF $59.95/mo, against ChatPDF $37.90/mo for ChatPDF. Team and business plans can cost more per seat. The Zekai Cost Finder on this page recalculates for any team size.

### Which is better, PDF.ai or ChatPDF?
Pro raises the cap to 100 PDF uploads and 1,000 questions a month; Ultimate is unlimited, uses an advanced model and adds Parse, Extract and Chat APIs plus team invites. Choose PDF.ai if you need up to 100 PDFs, API access or invited teammates, which ChatPDF Plus does not list. Stay with ChatPDF if you mostly read single PDFs yourself and want yearly pricing below $8 a month.

### Why are people leaving ChatPDF?
The documented reasons are: ChatPDF's own FAQ says the free plan analyzes 2 documents every day, and that queries are routed between GPT-4o and GPT-4o-mini. Rivals such as AskYourPDF list GPT-5 models. Date shown is the day the page was read (12 Nov 2026); ChatPDF has no public pricing page: /pricing returns 404 and the plans are shown only in an in-app Upgrade to Plus dialog ($14.99 monthly, $7.58 a month yearly) (12 Nov 2026). Each is sourced in the section above.

### What is the best ChatPDF alternative?
It depends on the job. AskYourPDF suits model choice, PDF.ai suits API and team use, NotebookLM suits many-source notebooks, and Kotaemon or Open Notebook suit self-hosting.

## Related on Zekai

- [NotebookLM alternatives](https://zekaiwork.com/alternatives/notebooklm/)
- [Open WebUI alternatives](https://zekaiwork.com/alternatives/open-webui/)
- [AI for Personal Productivity & Executive Assistants](https://zekaiwork.com/professions/ai-personal-productivity-executive-assistants/)

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Live table, team cost finder and price alerts: https://zekaiwork.com/alternatives/chatpdf/