Compare I, Librarian versions

Pro

First month free

then from $3 / mo. 1

Best for companies
Subscribe now!
  • online PDF organizer with extra features for research groups
  • centrally managed PDF collection, no syncing required
  • in-browser PDF viewer with annotation
  • LDAP, SAML2, and Microsoft OpenID SSO authentication
  • access your private collection from anywhere on the Internet
  • store unlimited number of PDFs (<200GB)
  • very accurate OCR for over 90 languages 3
  • faceted search with detailed snippets
  • search all Lite databases + ScienceDirect, Scopus, and 100M world-wide patents
  • PDF highlighted text summary and export
  • AI PDF summaries and keywords
  • user groups for project management
  • user activity logs
  • email support — 24 hour response time
  • Subscribe now!

Lite

First month free

then from $2 / mo. 2

Best for casual users
Subscribe now!
  • online PDF organizer with extra features for research groups
  • centrally managed PDF collection, no syncing required
  • in-browser PDF viewer with annotation
  • LDAP, SAML2, and Microsoft OpenID SSO authentication
  • access your private collection from anywhere on the Internet
  • store unlimited number of PDFs (<200GB)
  • very accurate OCR for over 90 languages 3
  • faceted search with detailed snippets
  • search Arxiv, Crossref, IEEE, NASA, PubMed, and PubMed Central
  • no PDF highlighted text summary
  • no AI functions
  • no user groups in project management
  • no user activity logs
  • email support — 24 hour response time
  • Subscribe now!

Free — GPL3

Forever

$0

Best free PDF manager :-)
Download
  • online PDF organizer with extra features for research groups
  • centrally managed PDF collection, no syncing required
  • in-browser PDF viewer with annotation
  • LDAP authentication, no SAML2 or OpenID single sign-on
  • self-hosted — access from the Internet requires an IT expert
  • recommended for up to 10,000 PDFs
  • accurate OCR for English language
  • simple search with result highlighting
  • search Arxiv, Crossref, IEEE, NASA, PubMed, and PubMed Central
  • no PDF highlighted text summary
  • no AI functions
  • no user groups in project management
  • no user activity logs
  • no customer support
  • Download
1
Pro fees are calculated as follows: $2.50/month per user + $0.50/month per 1GB of stored data.

2
Lite fees are calculated as follows: $1.50/month per user + $0.50/month per 1GB of stored data.

3
OCR fees — first 20 pages/month are free than 1¢/page.

Managed servers for larger groups

I, Librarian Pro Managed Server L

4 CPU
8GB RAM
120GB SSD

only $199 / mo.

I, Librarian Pro Managed Server S

2 CPU
2GB RAM
60GB SSD

only $150 / mo.

I, Librarian Lite Managed Server L

4 CPU
8GB RAM
120GB SSD

only $150 / mo.

I, Librarian Lite Managed Server S

2 CPU
2GB RAM
60GB SSD

only $99 / mo.

  • your own server with unlimited bandwidth
  • server locations – USA & Germany
  • server security updates
  • server uptime monitoring
  • I, Librarian upgrades
  • TLS certificate
  • custom access from the Internet
  • SFTP access
  • add extra SSD storage for $10/100GB/month
  • add backup $0.25/GB/month
  • add intrusion monitoring $75/month
  • OCR — first 100 pages/month are free than 1¢/page.

I, Librarian On-premises

I, Librarian Pro On-premises

I, Librarian Lite On-premises

  • no data ever leave your premises
  • create unlimited number of libraries
  • onboard unlimited number of users
  • perpetual license for a one time fee
  • IT department and end user support
  • version 5 upgrades and patches until 2025