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QuestBlue

QuestBlue is a US cloud communications provider offering SIP trunking, messaging, online fax and hosted PBX, largely through wholesale and partner channels.

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  • Founded 2007
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About QuestBlue

QuestBlue provides cloud voice, text and fax services for businesses and for the resellers who serve them. The company says it has supplied wholesale voice services since 2007, and it still sells heavily through managed service providers and carriers who put the service under their own brand.

Its product range covers the main building blocks of business telephony. Customers can buy SIP trunks for their own phone systems, use its QuBe hosted PBX, connect it to a contact-centre platform, or build calling and messaging into their own applications through its APIs.

What it offers

  • Enterprise cloud SIP trunking and bring-your-own-carrier setups
  • QuBe PBX and the SIP Blue 2.0 softphone
  • QB Connect for linking to contact-centre (CCaaS) platforms
  • iFax online faxing from any device
  • Voice, WebRTC and messaging APIs, including SMS, MMS, 10DLC and toll-free texting
  • Emergency calling, number porting, toll-free and international long distance

Who it serves

Managed service providers and carriers wanting white-label telecom, enterprises of various sizes, and software firms adding voice or text to their products. Industries it targets include call centres, healthcare and retail.

Profile written by TrustList from the business's own published information, Sep 2026.

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