RapidAPI
FreeAPI.watch
GovAPI Atlas
API CRUX
APIsList
Postman
JSON Placeholder
Discover, compare, and integrate public APIs using real-time health monitoring, OpenAPI documentation, and live availability signals.

ChatPDF
ChatGPT
Sharly AI
PDF.ai
Docalysis
Humata AI
NotebookLM
Chat with documents.

Which is more popular?
Based on our record, ChatDOC seems to be more popular. It has been mentioned 7 times since March 2021.
Website, pricing, platforms and company facts side by side.
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PAP
Public API
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| Website | public-api.org | chatdoc.com |
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What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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ChatDOC Chat with your documents 23 March 2023
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Public API and ChatDOC. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking Public API since Jan 2026.
I search an alternative to ChatDoc with an available API. I want to make an app where the user can upload a PDF and ask question about it. Source: over 3 years ago
I want to try this, but it's stuck at processing, showing 100% but not usable. I‘ve tried a lot of chat-with-pdf apps, including ChatDOC, ChatPDF, Humata and others. For serious paper reading, I must say that... - Source: Hacker News / over 3 years ago
Try ChatDoc: https://chatdoc.com/ I think it might be just what you're looking for. Source: over 3 years ago
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ChatGPT is a powerful, open-source language model.
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Search the APIs and web services that national open data portals list, one country at a time: Korea, Japan, the US, France, Germany, the UK, Taiwan, Canada, Australia and Singapore. Lists are refreshed weekly.
Compare GovAPI Atlas to Public API or ChatDOC:
