QuillBot

QuillBot started life as a paraphraser and quickly became known for its summarizer, grammar checker, plagiarism and AI detectors, translator and citation generator. For years most people used it to reword text or shorten long passages.

In 2026 it is a broader platform. The company reworked its AI Chat, introduced a prompt-to-design, goal-first workflow, and shipped an AI Presentation Maker that turns a prompt into slide decks. It also added a PDF suite (document Q&A, editing, merging, splitting and format conversion), a free AI Image Detector, and a native macOS desktop app, alongside a full UI rebrand. QuillBot does not use formal version numbers.

On the core writing side, the Paraphraser now includes an Academic Mode aimed at scholarly phrasing, and the Summarizer gained a Custom Mode for more control over output. Grammar checking, translation across dozens of languages, and the plagiarism and AI-content detectors remain part of the package.

Pricing is freemium. The free tier costs nothing but caps the paraphraser at 125 words and limits other tools. Premium is $19.95/month, $39.95/quarter or $99.95/year, unlocking longer inputs and the full mode lineup. A Team plan is available by custom quote.

The main limitations: the free plan's word caps are restrictive for regular work, the AI and plagiarism detectors are not authoritative and shouldn't be treated as proof, and the sheer number of tools can feel scattered compared with a focused editor.

QuillBot suits students, writers and non-native English speakers who want paraphrasing, summarizing and grammar help in one place, and who now also want chat, presentations and PDF tools without paying for separate apps.