Buyer's guide
How to choose a business phone system in 2026
A vendor-neutral framework for evaluating cloud phone systems — plus the questions most buyers forget to ask until after they've signed.
1. Decide cloud or on-premise
- Cloud: no hardware, monthly per-user fee, updates included
- On-premise: capex, maintenance contract, 5–7 year refresh cycle
- Hybrid: keep PBX, move trunks (see /sip-trunking)
- For under 500 seats, cloud wins on total cost almost every time
2. Size the real cost
- Per-user licence x seats x 36 months
- Number rental and porting fees
- Per-minute international and toll-free minutes
- Add-ons: recording, analytics, contact center, SSO
- Handsets and headsets
- Internal admin time
3. Non-negotiable features
- Auto attendant and IVR you can edit yourself
- Skill-based and time-based routing
- Call recording with retention controls
- CRM and helpdesk integration
- Mobile app with real presence
- Analytics on queues, agents and abandonment
4. Ask about reliability
- Published uptime SLA with credits
- Carrier redundancy per region
- Public, historical status page
- Support response targets by severity
- Escalation path to a named engineer
5. Plan the migration
- Audit every number and DID first
- Document existing call flows before changing them
- Pilot with one team for two weeks
- Port numbers in batches, not all at once
- Keep the old system live for 30 days
6. 12-point vendor checklist
- Transparent published pricing
- Free trial without a credit card
- Number porting at no charge
- Local numbers in every market you sell in
- Open API and webhooks
- 24/7 support on the entry plan
Frequently asked questions
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