What is Pressflow?

Pressflow is a distribution of Drupal with integrated performance, scalability, availability, and testing enhancements.

Pressflow addresses a long-standing problem: High-traffic sites use stable versions of Drupal, and stable versions of Drupal are ineligible for enhancements to solve performance bottlenecks discovered after widespread deployment.

Websites running Pressflow

• Ingle & Rhode
• eTech media
  • ClubRacer
  • WaterTrends
  • Boatfinder
• Al Qabas Newspaper
• Gamezebo
• Kleitas: Kleitu veikals (Dresses: online shop)
• colibritool.com
• abcinternet.pl
• moonlitepro.com
• data.gov.uk
• The Economist Online
• Yale University
  
  • YaleBiz
• NBC-Universal
  
  • NeverSayDiet
  • Bravo
  • iVillage
• Hearst Publishing (sites under development)
• Vanguardia Liberal
• El Espectador
• Men's Health Magazine
• Bicycling Magazine
• Dogfish Head brewery
• Symantec Connect
• The Grammy Awards
• Wikimedia Foundation
• OpenOffice.org Template Directory
• Oregon State University Open Source Labs (OSUOSL)
• Qatar Living
• Jacksonville.com
• Oregon Department of Education
  
  • Oregon Data Project
  • Oregon Virtual School District
• Silver Falls School District (Oregon)
  
  • Silverton High School
• Salem-Keizer School District (Oregon)
• Edutopia (George Lucas Educational Foundation)
• National Democratic Institute: http://afghanistanelectiondata.org/
• WikiJob
• Gambling Compliance Ltd.
• The World Bank
• Infoworld
• TakePart
• Xomba
• Urbo
• Taxi Bucuresti
• Adulmec
• Oxfam Deutschland
• 350.org
• BlogHer
• yoShopper.co.uk
• RÉCORD
• Central European University
• Telegraaf Media Groep
  
  • overeindhoven.nl
  • overwoerden.nl
  • overzwolle.nl
  • overheino.nl
• www.organix.com - from organic baby food pioneers in UK
• OneResult
• ModernMom.com
• Bieber Fever
• JBTV Online
• Backstage Betties (NSFW)
• eball.tw - a candidate in Taipei City mayor election 2010
• FreedomConnect
• Concrete Countertop Specialties
• Offerte in Agriturismo
• B&B Alghero
• B&B Milano
• B&B Venezia
• Terme Stufe di Nerone
• YouItaly
• Breda (top 10 municipality in The Netherlands)
• CodeChef.com
• Duedil.com
• zerohedge.com
• imbee.com
• Al Jazeera Satellite Network
• The Canterbury Earthquake Recovery Authority, Christchurch, New Zealand
• JimmyPage.com
• The MS Society, mssociety.org.uk
• Kigu.me, Australia's largest onesie retailer
• Latina.com
• TheLatinKitchen.com
• Memorial Sloan-Kettering Cancer Center
• Missouri Department of Conservation
• Star Wars: The Old Republic

Development studios

• Four Kitchens
• Chapter Three
• Tag1 Consulting
• Development Seed
• Advomatic
• Krimson
• Lullabot
• Dutch Open Projects (DOP)
• Tridz
• Blink Reaction
• Treehouse Agency
• Comunicamos.EU
• Studio Flegreo
• Terra Eclipse
• Linnovate
• NodeOne
• Soprano Brain Alliance
• Egressive
• 2.0 Web Solutions
• The Deeson Group

Supported by hosting companies

• Advomatic
• Acquia
• KPN (Dutch Tier 2ISP)
• omega8.cc
• Pantheon Systems
• infrenion.com (Infrenion Networks)
• Egressive
• 2.0 Advanced Drupal Hosting
• KranTowers Hosting
• eTech.be (Dedicated Drupal hosting)