- 1Runs onAndroid, API, iOS, Mac, Web, Windows
- 2CostsFree plan · free trial · paid from €2/mo
- 3Business callingYes
- 4Team messagingYes
- 5Video meetingsYes
- 6Call recordingYes
- 7Auto attendantYes
- 8Meeting participant limit2 participants
Overview
Rainbow is a cloud-based communication and collaboration platform for businesses, connecting people, objects and interactions through the cloud. Its tools include persistent one-to-one and group chat, presence information, task management, voice and video calls, screen or app sharing, and file sharing. Telephony features available on eligible plans include PBX control, phone presence, call logging, VoIP, caller identification, forwarding and voicemail. Office integrations include Google Chrome Click2Call, Rainbow Telephony for Microsoft Teams, Microsoft 365 Exchange Online or Google Calendar, and an Outlook plug-in. Hybrid telephony can connect with OmniPCX Enterprise, OXO Connect and third-party integrations for Cisco, NEC, Mitel and Asterisk. Rainbow offers cloud, on-premises and hybrid deployments, and its services are available in more than 75 countries and 22 languages. The plans list AES-256 encryption, region-based data residency and SAML or OIDC single sign-on. Essential costs 0.00 EUR per free; Business costs 2.00 EUR per month per user, and Enterprise costs 4.00 EUR per month per user. Business and Enterprise include 24/7 support and an uptime SLA; Essential includes a digital Help Center.
Who it is for
Rainbow is positioned for businesses ranging from small businesses to multinational organizations. Its chat, calling and telephony options may suit teams seeking cloud, on-premises or hybrid communications.
What is good
- Persistent one-to-one and group chat
- Includes voice and video calling
- Supports cloud, on-premises and hybrid deployment
- Plans list encryption and single sign-on
- Free Essential plan
What to know first
- Essential allows one administrator
- Essential has 1 GB storage
- Essential bubbles support 20 users
- Meeting participant limit is 2 participants
Verdict
Rainbow brings messaging, collaboration and eligible-plan telephony features into one service, with free and paid plans. The plans differ in sharing, storage and bubble limits, so users should check which tier matches their meeting and calling needs.
Rainbow plans and pricing
All plansCompared on unified communications software
- Free plan
- Yesopenrainbow.com
- Business calling
- Yesopenrainbow.com
- Team messaging
- Yesopenrainbow.com
- Video meetings
- Yesopenrainbow.com
- Call recording
- Yesopenrainbow.com
- Auto attendant
- Yesopenrainbow.com
- Meeting participant limit
- 2 participantsopenrainbow.com
Facts
- Product type
- Rainbow is a cloud-based communication and collaboration platform that can connect people, objects and interactions through the cloud.openrainbow.com · 30 Sept 2026
- Collaboration
- The service provides persistent one-to-one and group chat, presence information, task management, voice/video calling, screen or app sharing, and file sharing.help.openrainbow.com · 30 Sept 2026
- Telephony
- Hybrid and cloud telephony features include PBX control, phone presence, call logging, VoIP calling, caller identification, call forwarding and voicemail on eligible plans.help.openrainbow.com · 30 Sept 2026
- Integrations
- Office integrations include Google Chrome Click2Call, Rainbow Telephony for Microsoft Teams, Microsoft 365 Exchange Online or Google Calendar, and a Microsoft Outlook plug-in.help.openrainbow.com · 30 Sept 2026
- PBX connectors
- Hybrid telephony supports OmniPCX Enterprise, OXO Connect and third-party CTI and Media Bridge integrations for Cisco, NEC, Mitel and Asterisk.help.openrainbow.com · 30 Sept 2026
- Availability
- Rainbow services are available in more than 75 countries and 22 languages through web, Windows, macOS, Android, iPhone, iPad and Android TV apps.help.openrainbow.com · 30 Sept 2026
- Security
- The feature list states AES-256 encryption at rest and in transit, region-based data residency, and SAML or OIDC single sign-on across the listed plans.help.openrainbow.com · 30 Sept 2026
- Compliance
- The listed security and compliance capabilities include ISO/IEC 27001, French HDS, GDPR, ANSSI CSPN, Spain ENS, Italy AgID, HIPAA, FERPA and UK NHS support.help.openrainbow.com · 30 Sept 2026
- Support
- Business and Enterprise include 24/7 support with a 20-minute first response time and a 99.9% guaranteed uptime SLA; Essential includes a digital Help Center.help.openrainbow.com · 30 Sept 2026
- CPaaS
- Rainbow provides a CPaaS developer platform with APIs for contact management, chat, voice, video, screen sharing, file storage, group collaboration and automation bots.al-enterprise.com · 30 Sept 2026
- API usage limits
- The production CPaaS allowance includes 2,000 administration API calls, 5,000 Bots and Resource API calls, 500 WebRTC minutes and 5 GB storage per month before invoicing.al-enterprise.com · 30 Sept 2026
- Free trial offers
- The subscriptions page says some offers provide free trials or demonstrations, specifically Rainbow Hub and the Rainbow Telephony for Microsoft Teams connector.openrainbow.com · 30 Sept 2026
- Intended users
- Rainbow is positioned for businesses ranging from small businesses to multinational organizations and supports cloud, on-premises and hybrid deployments.al-enterprise.com · 30 Sept 2026
Company
- Headquarters
- Colombes, Franceopenrainbow.com · 28 Sept 2026
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Sources
- openrainbow.com/app/en/subscriptions-services· checked 30 Sept 2026
- help.openrainbow.com/hc/en-us/articles/20572471983506-Browse· checked 30 Sept 2026
- al-enterprise.com/en/rainbow/developers· checked 30 Sept 2026
- al-enterprise.com/en/company/about-us/history· checked 30 Sept 2026
- openrainbow.com· checked 28 Sept 2026
- openrainbow.com/offer/· checked 30 Sept 2026