AI PDF Reader
AI PDF reader built for your entire library, not just one document
Most AI PDF tools cap you at 10 or 50 files. Otio doesn't. Upload your entire library and ask questions across all of them at once. Every answer links back to the exact page and passage.
200,000+
Professionals worldwide
Unlimited
PDFs per session, no cap
7
AI models, every tier
$7
Lite Tier
The limit other tools don't advertise
For one PDF or a quick summary, every tool works. The moment you're working with 30 case files or 80 research papers, the cap shows up. Here's where each one stops.
Single-doc tools, one at a time
Fine for one PDF and a quick question. When you have 30 case files or 80 research papers, you hit the ceiling. Otio was built for that ceiling - unlimited sources, all queryable in one session.
Caps you at 10 files per message
Upload limits reset every session. Documents don't persist. Citations are frequently hallucinated. Otio stores your library permanently and cites every answer to the exact page. No invented references.
Stops at 50 sources, one model
Strong citations, but you're locked to Gemini and capped at 50 documents. Scanned PDFs don't work. Otio supports unlimited sources, every leading AI model, and dedicated OCR for scanned files.
Locked into one ecosystem
Up to 100 files in PDF Spaces, but tied to Adobe's subscription and one AI model. Otio gives you model choice, unlimited sources, and works with PDFs from any source.
Built different — by design
Unlimited sources, cited answers, your choice of model
Three technical differentiators in plain terms: RAG across unlimited sources, citations linking to exact page, and every leading model on every tier.
No document caps, ever
RAG across unlimited sources. 5 PDFs or 500 - chat across all of them in one session. Other tools break at 10, 50, or 100 files.
Every answer cites the exact page
Not a summary that sounds right - a response with a direct link to the specific passage. Click to verify in one click.
Dedicated OCR for scanned PDFs
Otio uses Datalab for scanned and image-based PDFs. Legacy documents, physical scans, older case files - all first-class.
Switch AI models mid-session
Claude, GPT, DeepSeek, Gemini, Grok, Kimi, Llama. All available on every tier. If one model handles your document type better, switch.
How it works
Three steps from upload to verified answer
Drag, drop, ask. Otio pulls findings across everything, cites the exact page, and lets you switch models mid-session.
1
Upload anything: PDFs, articles, videos, podcasts
Drag and drop, or connect Google Drive, Zotero, Mendeley, Dropbox, OneDrive, Box. Scanned PDFs work too — Otio uses dedicated OCR so legacy files are fully readable.
2
Chat across your sources with any AI model
Ask questions across all your documents at once. Switch between Claude, GPT, DeepSeek, Gemini, Grok, Kimi, and Llama mid-session. Every answer cites the exact page.
3
Start from a structured synthesis, not a blank page
Otio pulls key findings, themes, and quotes across everything. You get a structured starting point you can build on. You do the thinking — Otio gets you there faster.
For professionals who work with volume
Built for the people who actually read 60 PDFs at a time
Researchers, lawyers, consultants, analysts, writers. Anyone whose desk piles up faster than they can read.
Stop losing weekends to 60 papers you haven't read. Upload, pull key findings and quotes across all 60 at once. Start your literature review from a structured synthesis. Every answer cites the exact page.
Stop losing billable hours to discovery piles. Upload case files, depositions, compliance docs. Pull key facts, themes, contradictions across documents. Verify everything before it leaves your desk.
Stop losing Sunday night to 30 client docs. Upload meeting transcripts, reports, briefs. Pull key points and themes across everything. Build your deliverable on a structured summary in a fraction of the time.
Stop losing a day to data you only needed three lines from. Upload data files, research reports, market analysis. Extract specific figures without reading every page. Build visualisations from CSVs.
Stop losing hours to research that never makes it. Upload 50+ sources - articles, videos, podcasts. Pull arguments across everything grouped by theme. Start writing from a structured synthesis.
What makes Otio's citations different
Exact page, exact passage, one click to verify
ChatGPT invents authors, fake journals, page numbers that don't match. Otio cites the exact page and passage in the original source. Click the citation — the document opens to the exact location.
Otio generates answers only from material you've uploaded. It tells you when something isn't there instead of inventing one. Built for professionals who can't afford to trust unverifiable summaries.
"I don't know how you do it but the gap in summary and answer quality to ChatGPT is big. And having real text citations is a game changer."
ESG Reporting Analyst
Beyond PDFs
One workspace for every source you actually use
Most AI PDF readers only handle PDFs. Otio ingests PDFs, web articles, YouTube videos, podcast transcripts, and CSVs. Connect your existing tools - Google Drive, Zotero, Mendeley, Dropbox, OneDrive, Box.
Google Drive, Zotero, Mendeley
Testimonials
What our users say
Common questions about Otio's AI PDF reader
Can Otio handle scanned PDFs?
Yes. Otio uses a dedicated OCR service (Datalab) for scanned and image-based PDFs. This isn't a generic fallback — it's a first-class feature for professionals working with legacy documents, physical scans, and older case files. Upload them the same way you would any other PDF.
How many PDFs can I upload at once?
How does Otio cite its answers?
Can I use different AI models for different documents?
Is my data private?
What file types does Otio support besides PDFs?
Why wouldn't I just use ChatGPT?
Is there a free plan?
Try Otio on your full PDF library today
7 days free. Unlimited PDFs. Every AI model. Cited answers. No credit card.
