Side by side
PDF-ChatGPT vs PDFpal
Both stand on ai pdf assistants. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Paid APILinuxMac+3
PDF-ChatGPT provides a self-hosted PDF question-answering workflow with semantic retrieval and citations. Its main trade-offs are OpenAI usage costs, file and scan limitations, and the need to secure a default single-tenant deployment.
Visit PDF-ChatGPT Free plan APISelf-hostedWeb
PDFpal combines local document control with project-based research chat and scripting. Its lack of SaaS fees and usage caps is paired with setup requirements and dependence on a separate agent subscription.
Visit PDFpalThe facts
| PDF-ChatGPT | PDFpal | |
|---|---|---|
| Free plan | Not published | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Mac, Self-hosted, Web, Windows | API, Self-hosted, Web |
| Lowest paid plan | Not published | Not published |
| Plans published | None | None |
| Maker | Not published | Not published |
| Website | github.com | github.com |
| On ai pdf assistants | #27 of 27 | #23 of 27 |
PDF-ChatGPT: what it does well
- Open-source under the MIT License
- Citations identify document and page
- Supports multiple PDFs per chat
- Conversation history enables follow-ups
- Deployable on several hosting platforms
What to know first
- OpenAI key and metered billing required
- 25 MB maximum file size
- Scanned PDFs need added OCR
- Default setup has no login
PDFpal: what it does well
- Local storage and no cloud PDF uploads
- Chat across selected project sources
- Source citations in retrieved-paper answers
- Projects, collections, highlights, and Markdown notes
- Free with no SaaS fee or usage cap
What to know first
- Requires Node.js 22 or newer
- Requires an authenticated agent CLI
- AI use depends on an existing agent subscription
- Intended for local, single-user operation
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