On-premises PBX vs cloud PBX
An on-premises PBX is equipment you own and look after. A cloud PBX is a service you pay for each month. This table compares the two for a small office, including texting, fax and the fees on your bill.
| What to compare | On-premises PBX | PBXflex cloud PBX |
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| Upfront hardware | You buy or lease the PBX and the phones | No PBX to buy. Desk phones are optional |
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| Who maintains it | You, or a technician you pay | PBXflex runs the system. You change settings in the app |
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| Adding or removing users | Changed on the box, by you or a technician | In the app, any time |
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| Contract | Set by your phone line and maintenance providers | Month to month. Cancel any time |
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| Keeping your numbers | Your numbers stay with your phone line provider | Number porting is free on every plan |
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| Business texting | Usually a separate app or service | Included on every plan, from your business numbers |
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| Fax | Usually a fax machine on its own phone line | Included on every plan, in the app. A fax machine you keep can use a shared-device line for $10 a month |
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| Fees | Set by your phone line provider | No administrative or regulatory recovery fee. Taxes and government fees are extra |
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| Where calls ring | Desk phones connected to the box, mostly in the office | Desk phone, web app and mobile, at the same time |
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| What it needs to work | Power, phone lines and the box itself | Power and an internet connection wherever your phones are |
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On-site installation, including a VoIP-ready firewall or new cabling, is quoted per site.