8x8 vs 3CX
To do a VoIP cost comparison, we first have to look at what 8x8 and 3CX have in common, how they're different, and how the differences affect the overall cost of ownership.
8x8
Monthly subscription plans at 8x8 start at $35 per extension, depending on features. There are no start up costs, and no local server is required.
Note that the backbone of a subscription service is also a software PBX. The difference is that with a subscription service, you're renting (not buying) the software and they control your access to it.
3CX
3CX is priced by the number of calls it will carry at one time.
- 8-call annual license: $300
- 16-call annual license: $600
It can be hosted onsite or on a cloud server. The big difference in owning a system is control: you choose how many phone lines you need and how much to spend on them. Most importantly, since you're not paying by extension, you can put phones where you need them without worrying about additional monthly costs.
8x8 / 3CX Cost Comparison
20-Person Office Example
Example estimate, not a quote. Your cost depends on your plan, phones and call volume.
8x8
- Medium sized office with 20 extensions
- Variable upfront cost for phones
- No upfront cost for system
- No local server required
- Flat fee of $700 per month (assuming lowest tier plan; could be twice that much)
Estimated 5-year cost$42,000
3CX
- Medium sized office with 20 extensions
- Variable upfront cost for phones (or use the free smartphone or desktop app)
- Annual 8-call 3CX license: $300
- Windows or Linux computer to run 3CX locally: $200 (or host in the cloud)
- Monthly SIP trunk charge (unlimited incoming, 5,000 minutes outgoing): $100
Estimated 5-year cost$7,700
8-Person Office Example
Example estimate, not a quote. Your cost depends on your plan, phones and call volume.
8x8
- Small office with 8 extensions
- Variable upfront cost for phones
- No upfront cost for system
- No local server required
- Flat fee of $280 per month (assuming lowest tier plan; could be twice that much)
Estimated 5-year cost$16,800
3CX
- Small office with 8 extensions
- Variable upfront cost for phones (or use the free smartphone or desktop app)
- Annual 8-call 3CX license: $300
- Windows or Linux computer to run 3CX locally: $200 (or host in the cloud)
- Monthly SIP trunk charge (unlimited incoming, 2,000 minutes outgoing): $60
Estimated 5-year cost$5,300
Subscription prices are the lowest published tiers and change often. Call (512) 696-1515 for a quote based on your own bill.
Stop overpaying for VoIP
If you're currently using one of these monthly subscription VoIP providers, you could be saving thousands per year with Erling Business Phone Systems powered by 3CX: RingCentral, Vonage, 8x8, Nextiva, Mitel, Spectrum VoIP, Ooma Office, Net2Phone, Zoom, Jive Communications, MegaPath, VoIPLy.
Call for a cost comparison based on your own phone bill.
Talk to a local phone system specialist
- (512) 696-1515
- 9804 Ravenwood Cv. Austin, TX 78750

Try 3CX PRO free before you commit.

