Rainbow
Colombes, France
What it is
Rainbow is a cloud-based communication and collaboration platform for businesses, with chat, presence, task management, voice and video calls, screen or app sharing, and file sharing. It supports persistent one-to-one and group conversations. Telephony features on eligible plans include PBX control, phone presence, call logs, VoIP, caller identification, forwarding, and voicemail. Office integrations include Google Chrome Click2Call, telephony for Microsoft Teams, Microsoft 365 Exchange Online or Google Calendar, and an Outlook plug-in. Hybrid telephony can connect to OmniPCX Enterprise and OXO Connect, as well as third-party CTI and Media Bridge integrations. Rainbow services are available in more than 75 countries and 22 languages through web, desktop, mobile, and other listed apps. Listed security capabilities include AES-256 encryption at rest and in transit, region-based data residency, and SAML or OIDC single sign-on. Essential is free; Business costs €2.00 per user per month and Enterprise costs €4.00 per user per month. Business and Enterprise include 24/7 support and an uptime SLA; Essential includes a digital Help Center.
For and against
For
- Persistent one-to-one and group chat
- Telephony and Microsoft or Google integrations
- Available in more than 75 countries and 22 languages
- Free Essential plan
- Business and Enterprise include 24/7 support
Against
- Some telephony features are limited to eligible plans
- Production CPaaS usage has monthly allowances before invoicing
The verdict
Rainbow brings messaging, collaboration, and telephony options into one platform, with deployment choices for different business setups. Check plan eligibility for calling features and CPaaS limits before choosing.
Who it suits
Rainbow is positioned for organizations from small businesses to multinationals, including those using cloud, on-premises, or hybrid deployments. Its CPaaS APIs may suit developers building communication features.
Plans and prices
Rainbow Essential
1 administrator · 1-to-1 audio/video/screen sharing · 1 GB storage · 20-user bubbles
Read 30 Sep 2026 · openrainbow.com
Rainbow Business
1-to-1 audio/video/screen sharing · 1 GB storage · 20-user bubbles · SLA
Read 30 Sep 2026 · openrainbow.com
Rainbow Enterprise
Up to 10-user audio/video/screen sharing · 20 GB storage · 100-user bubbles · SLA
Read 30 Sep 2026 · openrainbow.com
On the record
- 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 2026
- Product type
- Rainbow is a cloud-based communication and collaboration platform that can connect people, objects and interactions through the cloud.openrainbow.com · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 2026
