Known users

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The Halon platform is used primarily by web hosting and email service providers, and powers some of the world's most popular mail servers.[1] The list below contains some of the known users and a few testimonials.

Service providers

  • DuoCircle/Mailhop,[3] formerly's email service[4]
  • Host1Plus[5]
  • Crystone
  • Ipeer, part of Cygate/TeliaSonera
  • Ballou
  • Baltic Servers
  • bHosted
  • Binero
  • Space2u
  • Oderland


  • APNIC, RIR for the Asia Pacific region
  • IIS, also known as .se, ccTLD operator for Sweden


  • Shine Nordics (formerly Metronome)
  • Spil Games


"It is rare that I recommend a commercial product at all, but this deserves it. It is very robust and easy to follow the flow of emails." —Peter Magnusson, Crystone

“Halon enabled us to reduce initial capital cost, ongoing support and maintenance costs, rack space, and ongoing power and cooling requirements by up to 70%” — Anders Saaby,

"DuoCircle reduced hosting costs and saved 30% on operating costs, reduced time of managing networks by 90% and improved customer response time to minutes from hours.” — Brad Slavin, CEO, DuoCircle

“We now have one platform, a good user interface and scalability. With Halon we do very little administration and maintenance, despite our large e-mail volumes. We couldn’t be more satisfied.” — Jonas Gustavsson, CEO, Ballou