3CX is a business communications platform that replaces traditional PBX hardware with a software-based phone system. It supports voice calls, video conferencing, a website live chat widget, and call center features like queues and reporting, and can be deployed on-premises, in a private cloud, or via 3CX's own hosting service.
Quo, rebranded from OpenPhone in September 2025, is a VoIP-based business phone system that gives teams shared numbers, calling, and SMS/MMS messaging in one collaborative inbox. Multiple teammates can see and respond to the same business number's calls and texts, with routing rules to direct incoming contacts to the right person. Quo layers an AI agent called Sona on top of the phone system to answer calls automatically, transcribe conversations, and summarize them, along with call recording and analytics. It is used mainly by startups and small businesses that need a professional, multi-line phone presence without deploying a traditional PBX, and it integrates with common CRMs like HubSpot and Salesforce on its higher tiers.
- No per-extension licensing, so adding users doesn't directly raise cost
- Combines voice, video, and live chat in one system instead of separate tools
- Flexible deployment: self-hosted, private cloud, or 3CX-hosted
- Free tier available for small teams to try before committing
- Genuinely shared numbers make small-team phone support feel organized instead of chaotic
- Sona AI agent reduces missed calls outside business hours
- Clean, modern apps across desktop, iOS, and Android
- CRM integrations are useful for sales-heavy small teams
- Initial setup and SIP trunk configuration can be technical for non-IT admins
- Pricing tiers and editions have changed multiple times, making cost planning harder
- Advanced features like call center reporting are gated behind higher tiers
- Recent rebrand from OpenPhone to Quo may confuse existing users and search results for a while
- Per-user pricing adds up quickly for larger teams
- Advanced AI and integration features are gated behind the pricier Business and Scale tiers
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Cloud business phone, messaging, and video platform with AI-powered call handling.
The Verdict
AI-generated from listing dataQuo offers a cloud‑only, shared‑number phone system with AI call handling ideal for small sales teams, while 3CX provides a flexible, self‑hosted or hosted PBX with video, chat, and call‑center features suited to tech‑savvy midsize firms.
Key differences
- •Deployment model: Quo is SaaS only; 3CX can be self‑hosted, private‑cloud, or 3CX‑hosted.
- •Pricing structure: Quo charges per user subscription; 3CX charges by simultaneous call licenses and has a free tier.
- •AI capabilities: Quo includes built‑in AI agent (Sona) for after‑hours answering and call summaries; 3CX does not mention AI.
- •Collaboration tools: Quo focuses on shared numbers and group calling; 3CX adds video conferencing, live‑chat, and call‑center queues.
- •Integration focus: Quo integrates natively with HubSpot and Salesforce; 3CX integrates with Salesforce, Microsoft 365, and Google Workspace.
Pricing & value
3CX pricing is based on simultaneous calls and includes a free edition, whereas Quo uses per‑user subscription fees.
Ease of use / learning curve
Quo is a pure cloud service with modern desktop and mobile apps, requiring no on‑premise setup.
Features & depth
3CX offers video conferencing, live‑chat widgets, and call‑center queues beyond basic phone calling.
Integrations & ecosystem
3CX lists three major integrations (Salesforce, Microsoft 365, Google Workspace) versus Quo’s two (HubSpot, Salesforce).
Collaboration
Quo’s shared numbers, group calling, and AI‑generated call summaries are built for team phone collaboration.
Scalability
3CX’s simultaneous‑call licensing and self‑hosted option scale without per‑user cost growth.
Support
Both offer email, live chat, and phone; 3CX also provides a community forum, adding an extra channel.
Choose 3CX if…
Tech‑oriented midsize businesses wanting on‑premise control, video/chat, and call‑center features.
Choose Quo if…
Startups or small teams needing a simple shared business phone with AI assistance and CRM sync.
Common questions
How is pricing calculated for each product?
Quo charges a subscription per user; 3CX charges by the number of simultaneous calls and offers a free tier.
Can I host the system on my own servers?
Quo is cloud‑only SaaS; 3CX can be self‑hosted, private‑cloud, or 3CX‑hosted.
Which product includes AI‑driven call handling?
Quo includes the Sona AI agent for after‑hours answering and automatic call summaries; 3CX does not list AI features.