ChatDOC alternatives · AI Research
ChatDOC alternatives with an iPhone and iPad app
The ChatDOC listing does not include an iPhone and iPad app. 15 of the 69 other AI research tools in this directory list an iPhone and iPad app.
ChatDOC is a paid product with a free trial, starting at $89.9 per 360 days (a 30-day plan is also sold). 10 of them are free or have a free plan.
15 tools · Listings checked up to Nov 13, 2026 · Where the facts come from
The 12 closest to ChatDOC
- Free plan · from $89.99/yr
ChatPDF
Ask questions about PDFs and get answers with citations
- ChatPDF starts at $89.99 per year or $14.99 per month (US App Store in-app purchase). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- ChatPDF has a free plan. ChatDOC does not, though it has a free trial.
- Only ChatPDF lists macOS, Windows, iOS and Android apps.
- Only ChatDOC lists a browser extension.
- Free plan · from $11.99/mo
AskYourPDF
Chat with PDFs and other documents and get cited answers
- AskYourPDF starts at $11.99 per month, billed yearly ($14.99 billed monthly). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- AskYourPDF has a free plan. ChatDOC does not, though it has a free trial.
- Only AskYourPDF lists iOS and Android apps.
- Free plan · from $8/mo
Anara
AI research assistant that cites the exact source passage
- Anara starts at $8 per seat / month, billed yearly ($10 billed monthly). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- Anara has a free plan. ChatDOC does not, though it has a free trial.
- Only Anara lists macOS and iOS apps.
- Anara also covers AI search, web clipper and AI agents.
- Free plan · from $12/mo
SciSpace
AI research platform for literature review and reading papers
- SciSpace starts at $12 per month, billed annually ($20 billed monthly). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- SciSpace has a free plan. ChatDOC does not, though it has a free trial.
- Only SciSpace lists an iOS app.
- SciSpace also covers AI search and AI agents.
- Free plan · from $69/yr
R Discovery
Paper discovery app with an AI assistant, PDF chat and audio
- R Discovery starts at $69 per year, or $12 billed monthly (US prices). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- R Discovery has a free plan. ChatDOC does not, though it has a free trial.
- Only R Discovery lists iOS and Android apps.
- R Discovery also covers AI search.
- Free plan · from $14.99/mo
Liner
AI search with cited answers, research agents and a writer
- Liner starts at $14.99 per month, billed annually ($17.99 billed monthly). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- Liner has a free plan. ChatDOC does not, though it has a free trial.
- Only Liner lists macOS, Windows, iOS and Android apps.
- Liner also covers AI search, AI agents, long-form writing and highlights.
- Free plan · from $8/mo
alphaXiv
arXiv reading and discovery site with an AI research assistant
- alphaXiv starts at $8 per month (alphaXiv Go). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- alphaXiv has a free plan. ChatDOC does not, though it has a free trial.
- Only alphaXiv lists an iOS app.
- alphaXiv also covers AI search and highlights.
- Free plan · from $7/mo
Otio
AI research workspace for chatting across many sources
- Otio starts at $7 per month (Lite), billed monthly or $84 per year. ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- Otio has a free plan. ChatDOC does not, though it has a free trial.
- Only Otio lists macOS, Windows, Linux and iOS apps.
- Otio also covers AI search, notes and AI agents.
- Free trial · from $95/yr
ReadCube Papers
Reference library with an AI assistant for cited answers
- ReadCube Papers starts at $95 per user / year, billed annually ($10 billed monthly). ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- Only ReadCube Papers lists iOS and Android apps.
- ReadCube Papers also covers web clipper and highlights.
- Free plan · from $20/yr
Zotero
Free, open-source reference manager from a nonprofit
- Zotero starts at $20 per year for 2 GB of file storage. ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- Zotero has a free plan. ChatDOC does not, though it has a free trial.
- Only Zotero lists macOS, Windows, Linux, iOS and Android apps.
- Only ChatDOC lists a web app.
- Free trial
Eightify
AI summaries and key insights for YouTube videos
- Only Eightify lists iOS and Android apps.
- Only ChatDOC lists a web app.
- Eightify also covers transcription.
- ChatDOC also covers citations.
- Free trial · from $8.30/mo
Paperpile
Reference manager built around Google Drive, Docs and Word
- Paperpile starts at $8.30 per month, billed annually. ChatDOC starts at $89.9 per 360 days (a 30-day plan is also sold).
- Only Paperpile lists iOS and Android apps.
- Paperpile also covers web clipper and highlights.
- ChatDOC also covers chat assistant.
Common questions
Which ChatDOC alternatives have an iPhone and iPad app?
ChatPDF, AskYourPDF, Anara, SciSpace, R Discovery, Liner, alphaXiv, Otio and 7 more list an iPhone and iPad app.
Does ChatDOC have an iPhone and iPad app?
The ChatDOC listing does not include an iPhone and iPad app. It lists Web and Browser extension.
Which of these AI research tools are free?
ChatPDF, AskYourPDF, Anara, SciSpace, R Discovery, Liner, alphaXiv, Otio and 2 more are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to ChatDOC: the alternatives its listing names first, then the tools that share the most features with it.