Otio

Otio is a web-based AI research and writing platform for researchers, students, writers, and professionals who need to turn PDFs, links, and videos into grounded notes and long-form drafts.

Key capabilities include:

• Multi-format import for PDFs, Word documents, blog links, and YouTube videos, then automatic summarization and insight extraction
• Chat with documents to ask questions against uploaded sources and reduce time spent searching through long papers or recordings
• AI text editor for outlining, drafting, editing, and paraphrasing content that stays grounded in the sources provided (with citations)
• Workflow automation builder to automate repetitive research and writing steps, plus document comparison for side-by-side analysis

Pricing: Freemium, with a free tier and paid plans starting at $18/month.

Notable for combining source-grounded Q&A, an in-editor writing workflow (instead of switching between chat and docs), support for 50+ languages, and a Chrome extension, plus real-time collaboration for teams working on research-heavy projects.