Most offices should use VoIP, and a landline only wins when the line must work without internet.
Keep copper for an alarm, a lift, or a card terminal that cannot use the internet.
VoIP adds mobile apps and voicemail to email that a landline does not.
Each range below is the published premium price, widened by that vendor's confidence band. State tax is not included, because it depends on where you are. Prices as published by each provider. Data as of 2026-10-04.
A TechEstimate is a range. A written proposal is the number you can hold a provider to.
These phone systems are alphabetical. This is not a quality ranking.
TechlyScore ranks them for your setup when you compare in real time.
123NET: $21 to $39 per user/month. 8x8: $26 to $30 per user/month. Aircall: $35 to $45 per user/month. AireSpring: $24 to $46 per user/month. Allworx (Windstream): $18 to $32 per user/month. AT&T Office@Hand: $26 to $34 per user/month. Avaya Cloud Office: $22 to $28 per user/month. BCM One: $19 to $35 per user/month.
More providers are in the same table. The list stays alphabetical.
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For most offices, yes. VoIP adds mobile apps, voicemail to email, and the ability to move a number without moving a line. A landline wins only where you need a connection that works with the internet down.
VoIP is cheaper per line, adds features, and moves with you. It depends on your internet connection and your power supply. A landline is simple and resilient, but costs more and does almost nothing beyond carrying a call.
Usually, and the gap widens with more lines. A landline bills per physical line, while VoIP bills per user and shares one internet connection. The saving is largest for offices with many phones.
On a stable connection with enough upload speed, yes. Quality problems almost always trace back to the network rather than the phone system. Wired connections and traffic prioritization fix most of them.
Yes. Porting a number to a new provider is a legal right and it is routine. Do not cancel your old service first, because cancelling can release the number and make it harder to recover.
Related: is-voip-good-for-small-business, cheapest-business-phone-service, free-phone-system-for-small-business. Glossary: voip, pbx. How to buy.
Data as of 2026-10-04.