R Discovery vs SciSpace

R Discovery

• Researchers who want a daily feed of new papers in their field
• Reading on a phone: the iOS and Android apps include audio versions of papers
• Readers who want papers translated into their own language
• Paperpal users who want search and writing tools on one subscription

SciSpace

• Students and researchers who want search, reading and writing tools in one place
• Getting plain-language explanations of dense papers, equations and tables
• Research teams of 2 to 300 people billed per user

R Discovery

• Free accounts get 3 AI Assistant uses and 3 Chat PDF uses a day, with 5 file uploads a month.
• Literature maps, content feeds, multiple projects and Zotero or Mendeley sync are listed for paid plans only.
• The site bills in local currencies, so prices vary by country. The US prices here are from the pricing page's own price data and agree with the US App Store listing.
• Refunds are limited to 30 days after purchase on annual plans and 7 days on monthly plans.

SciSpace

• SciSpace's site blocked automated reading, so prices come from an Internet Archive copy of its pricing page captured on September 30, 2026.
• The limits of the free tier could not be confirmed on a SciSpace page.
• Paid plans meter usage in monthly credits: 1,200 on Premium, 10,000 on Advanced and 40,000 or more on Max.
• The mobile app is listed for iPhone and iPad; no Android app was found on Google Play (US) when checked.

R Discovery

Ask R Discovery

An AI assistant that answers research questions with references drawn from more than 300 million papers. Free accounts get 3 uses a day.

Chat PDF

Upload a paper, or pick one already on R Discovery, and ask questions about it. The free plan allows 3 uses a day and 5 file uploads a month.

Literature Review

Finds relevant papers and synthesizes findings, gaps and themes across them. The feature page says it is available only on a desktop or laptop.

Personalized feed and alerts

A feed of papers matched to chosen interests, with alerts for new publications in a field. Personalized recommendations and curated content feeds are part of Prime.

Audio papers and translation

Listen to papers read aloud and read them in more than 30 languages. Use is limited on the free plan and unlimited on Prime.

Library and reference manager sync

Save papers to reading lists. Prime syncs those lists to Zotero or Mendeley automatically and lets collaborators share them.

SciSpace

Literature Review

Ask a research question in plain language and get answers drawn from a repository of more than 270 million papers, each with references to its sources.

Chat with PDF

Ask questions about a paper or PDF and get answers backed by citations that point to where in the source they came from.

SciSpace Agent and Biomedical Agent

Agents take on research tasks and draw on the plan's monthly credits. Each plan also caps how many tasks run at once: 4 on Premium, 8 on Advanced and 16 on Max.

Writing and citation tools

AI Writer, Paraphraser and AI Detector sit beside a Citation Generator that formats references in APA, MLA and more than 2,300 other styles.

Extract Data

Pulls the summary, conclusions and findings out of several PDFs at once so papers can be compared side by side.

Chrome extension

Explains highlighted text, math and tables on any web page or PDF, answers follow-up questions with citations and replies in 13 languages.

R Discovery

• Free$0

  Standard recommendations, 3 AI Assistant uses a day, and 3 Chat PDF uses a day with 5 file uploads a month. No credit card required.

• Prime$69

  per year (shown as $6 a month, billed yearly); $12 billed monthly

  Unlimited AI Assistant, Chat PDF and Literature Review, literature maps and Zotero or Mendeley sync. Crossed-out prices: $119 a year and $19 a month.

• Paperpal Prime$144

  per year (shown as $12 a month, billed yearly); $25 billed monthly

  Everything in Prime plus Paperpal writing tools, plagiarism and reference checks, Mind the Graph illustrations and research skill courses.

SciSpace

• Premium$12

  per month, billed annually ($144); $20 billed monthly

  1,200 credits a month and up to 4 concurrent tasks.

• Teams (Premium)$15

  per user / month, billed annually ($180); $25 billed monthly

  For 2 to 300 users, each with 1,200 credits a month and up to 4 concurrent tasks.

• Advanced$70

  per month, billed annually ($840); $90 billed monthly

  10,000 credits a month and up to 8 concurrent tasks.

• Teams (Advanced)$75

  per user / month, billed annually ($900); $100 billed monthly

  For 2 to 300 users, each with 10,000 credits a month and up to 8 concurrent tasks.

• MaxFrom $160

  per month, billed annually ($1,920); from $200 billed monthly

  Priced by credit tier, from 40,000 credits a month up to 300,000, with up to 16 concurrent tasks.

• Teams (Max)$175

  per user / month, billed annually ($2,100); $220 billed monthly

  For 2 to 300 users, each with 40,000 credits a month and up to 16 concurrent tasks.

R Discovery

• Annual discount

  Yearly billing costs about half of monthly

  In the US price data, Prime is $69 a year against $12 a month, and Paperpal Prime is $144 a year against $25 a month. Both work out to about 52% less over a year.

SciSpace

• Annual discount

  Save 20% to 40% with annual billing

  Annual billing brings Premium from $20 to $12 a month (40% off), Advanced from $90 to $70 (22% off) and the entry Max tier from $200 to $160 (20% off).