ChatPDF vs Kagi Summarize

ChatPDF lets users summarize documents and ask questions about their contents using conversational AI. Answers include citations that point to references in a PDF, and users can organize files in folders or discuss multiple PDFs in one conversation. It accepts PDFs in any language and supports conversations in any language; listed file types also include Word, PowerPoint, Markdown and text. Sharing links can be created, with access permissions managed or revoked. ChatPDF says documents are encrypted during transfer and storage and can be deleted by the user. Queries are routed dynamically between GPT-4o and GPT-4o-mini. The service works in a browser on any device and is listed for Android, iOS, Linux, macOS and Windows. Its backend API accepts uploaded PDFs or public URLs and lets users query them to build custom PDF chatbots. The API documentation limits each PDF to 2,000 pages or 32 MB and describes the chat API as stateless. The Free plan costs nothing and allows two documents per day.

Kagi Summarize creates summaries of web pages, videos and podcasts when a transcript is available. It accepts URLs for web pages, PDFs, PPTX files, MP3s and videos. Output choices include headlines, brief summaries, digests, medium or long summaries, bullet points and ELI5; users can also translate a summary with Kagi Translate. Kagi lists Cecil as consumer-grade, Agnes as consumer-grade and Muriel as enterprise-grade; Agnes and Muriel are available through the browser extension or API. Summarize is accessible in Kagi search results, through the!sum Bang, in Orion on Apple devices, and in Chrome and Firefox extensions. The API supports text pages, PDFs, PPTX and DOCX files, MP3/WAV audio, experimental YouTube URLs, and scanned PDFs or images using OCR. API requests are limited to 1 MB and require a Kagi account and API credits. A trial includes 100 searches and 100 AI interactions with standard models. Starter costs $5 per month plus tax; there is no free plan.