Rainbow Office Softphone
Rainbow Office Softphone
by Rainbow Office

Provides essential communication capabilities by enabling you to call, fax, conference, and hold online meetings from your desktop.

Rainbow Office Phone

With Rainbow Office Softphone, you can manage your phone system directly from your preferred device and operating system (OS) to take calls, listen to voice messages, and send or receive faxes from anywhere. Easily separate your business and personal communications on the same device, and all without using any carrier minutes.

You can also access the same capabilities on the Rainbow Office App, which is our unified app that lets you access team messaging, phone calling, and video meetings all from one intuitive interface.

Key Features

  • Make and receive VoIP calls over WiFi, even while traveling internationally, or over 3G.4G without using your carrier minutes
  • Never drop another important call. Call handoffs allow you to switch from using a data network to a carrier network during a call
  • Visual Voicemail makes it easy to see who left you a message, forward messages, and tap to return calls based on your priorities
  • Bring your own device (BYOD) to work. Personal contacts are conveniently separated from your company directory
  • Single business identity - use your one business number for calling and faxing
  • Manage active calls efficiently with advanced call controls to transfer, record, flip, or park the call.
  • Reply to calls with automated text-to-speech messages, or send callers to voicemail without interrupting the current call
  • Host and attend online meetings from your Android, and easily collaborate with screen share, integrated chat, and file sharing from your desktop or cloud storage (Box and Dropbox)
  • Hold unlimited conference calls. Start or join calls with one tap, and invite up to 1,000 participants by email
  • Easily send a fax and attach a note, photos, or files from cloud storage (Box and Dropbox)
  • Manage your phone system from the palm of your hands
  • Update and manage your entire system of locations, departments, extensions, and direct numbers wherever you go
  • Enable BYOD (Bring Your Own Device) for all employees, reducing TCO (Total Cost of Ownership) for devices while improving productivity
  • Safeguard confidential business information - easily add or remove users who have access to company data customer contacts.



  • Windows 7, 64-bit, or later
  • x64-based 2GHz processor
  • 8 GB RAM
  • 500 MB of free storage space


  • Mac OS X 10.13 High Sierra or later
  • Intel-based processor
  • 8 GB RAM
  • 500 MB of free storage space

App Scope and Permissions

When authorized, this app will be granted the following permissions:

Team Messaging LegacyManage Team Messaging related data using legacy APIs
Edit Meetings PresenceView and modify user meeting presence status
MeetingsCreate, view, update and delete meetings
VoIP CallingRegister VoIP-enabled devices, and make and receive VoIP calls
Read Client InfoView client application provisioning information
InteroperabilityFacilitate inter-app authorization and perform other interoperability functions
Team Messaging InternalManage Team Messaging data using an internal Team Messaging API
Direct Ring OutPlace phone calls via direct RingOut
GCM SubscriptionsManage and subscribe to Firebase (Google) Cloud Messaging notifications
Glip LegacyDeprecated: TeamMessagingLegacy permission should be used instead
Edit PresenceView and modify user presence status
Send NotificationsSend notifications to the current user
Edit AccountsView and update account information, create, update and delete user extensions
FaxesView, send and receive faxes
Glip InternalManage Glip data using an internal Glip API
Edit Call LogView, update and delete user call log records
AIAnalyze audio and text. Also supports view and update analysis info including speaker samples.
Read Call RecordingDownload call recording content and media
WebSocketMake API calls via the WebSocket transport
WebSocket SubscriptionsManage and subscribe to websocket notifications
ContactsView, create, update and delete personal address book contacts
Edit ExtensionsView and update extension information, including name, extension number, phone number, email, etc.
Telephony SessionsControl advanced telephony session features
Ring OutPerform two-legged ring out phone calls
SMSSend and receive SMS/MMS messages
Internal MessagesSend, and edit intra-company text messages
Edit MessagesView and update message store data, including SMS, fax, voicemail, etc.
Send Usage InfoSend usage information to enable reporting