What a small business phone system is, and what it is not
A business phone system gives you a phone number that belongs to the business rather than to a person, and a layer on top of it: a greeting in the company's name, rules about where calls ring and when, voicemail that reaches the right person, and the ability for more than one person to answer.
Almost all of them are now cloud systems, which means the number lives with the provider and rings on whatever you choose: an app on a phone, software on a laptop, a handset on a desk, or all three at once.
It is not a second line on your mobile. That gives you a number and nothing else: no greeting, no routing, nobody else able to answer, and no way to separate it from you.
It is not a free consumer number. Those work for person-to-person calling and are a poor base for a business that texts customers, for reasons set out under texting below.
What it costs
Published entry pricing across the main providers, annual billing unless stated.
| Provider | Entry price | Minimum term | Self-serve trial |
|---|---|---|---|
| Grasshopper | From $14 per month, flat rate, unlimited users | None published | 7 days, no credit card |
| Dialpad | $15 per user, $27 monthly | Not published | 14 days |
| Nextiva | $15 per user | 12 months or longer | No, demo only |
| SoundLine | $14.99 per user, $19.99 monthly | None, month to month available | 7 days |
| Quo, formerly OpenPhone | $15 per user, $19 monthly | None stated | 7 days |
| Vonage | $14.99 to $19.99 monthly by size band | Minimum 1 year, early termination fees | No free trial on these plans |
| Ooma Office | $19.95 per user | No contract necessary | Not published |
| RingCentral | $20 per user, $30 monthly | Not published | 14 days, SMS not available for trial use |
| Aircall | $30 per license, minimum 3 licenses | Not published | Free access, no length published |
| 8x8 | No published pricing | Not published | Not published |
Budget fifteen to thirty dollars per user per month, and then expect the real figure to be higher, because the headline rarely includes everything. Toll-free numbers, unlimited domestic minutes, analytics, call recording, extra meeting capacity and anything described as AI are commonly priced separately. Card processing fees, regulatory recovery fees and taxes land on the invoice rather than the pricing page.
The eight questions that decide it
1. How many people need the phone? This changes the answer more than anything else. One or two people: look at the flat-rate and single-seat options. Aircall will not sell fewer than three licenses. Grasshopper's flat rate stops making sense in reverse once you have many numbers rather than many people.
2. Do you text customers? The most commonly underestimated question. Included allowances range from 25 messages per user per month to unlimited, which is a hundredfold spread hiding behind similar headline prices. Check this before you check anything else if texting is part of the job.
3. What do you commit to? A twelve-month term against a seven-day trial is a bigger difference than five dollars a seat. Two of the providers above require a year; two will not let you try it alone at all.
4. Can you test the thing you care about? A trial with texting switched off does not answer question two.
5. Does anyone else need to answer? If yes, you need routing, extensions and a shared voicemail, which is the line between a phone system and a phone number.
6. Will there be desk phones? Front counters, workshops, exam rooms and reception desks still want a handset. Not every provider provisions them.
7. What happens when the internet goes down? Calls keep arriving at the provider; whether they reach you depends on a forwarding rule you set in advance. Ask how it works and be wary of anyone who says it cannot happen.
8. Who answers when something breaks, and on which plan? Phone support is frequently a higher tier.
Which provider suits which situation
One or two people, texting customers. SoundLine or Quo. Grasshopper if several people share one number and you do not need video or scheduling.
Several people sharing one business number. Grasshopper, on the flat rate, is the cheapest honest answer.
Running more than one business. SoundLine. That is the thing the product is organized around, and it is why this page sits on our site rather than someone else's.
A sales team or a support desk. Dialpad or Aircall. Skills-based routing, power dialing and live coaching are real products.
Live AI transcription as the main reason to buy. Dialpad, where it is mature and on the entry plan.
A toll-free number included. Ooma Office includes one with 500 inbound minutes a month.
Procurement, an account team, a signed agreement. RingCentral, Nextiva or 8x8.
A contact center, APIs, or international scale. 8x8, or RingCentral's RingCX.
The texting question, in detail
Worth its own section because it catches the most people.
Business texting in the United States must be registered with the carriers under the framework called A2P 10DLC, which records who is sending and what they send. Registered traffic is delivered. Unregistered traffic is throttled, filtered or silently dropped, with no bounce message, so the sender never learns it happened.
Two things follow. First, a free consumer number is a poor base for a business that texts customers, because there is no business registration path. Second, when you compare providers, compare the included allowance and who does the registration work. Published allowances on the entry plans range from 25 outbound messages per user per month to unlimited.
What this page is not telling you
We sell one of the products in the table. Three things we would rather you knew from us than found out later.
We have no free tier. Several providers do, and if a free number is enough for you, take one.
Our texting allowance is 1,000 outbound per user per month under fair use. Aircall includes four times that, and Grasshopper publishes unlimited.
We have no contact center product. If that is what you are buying, three of the providers above are better answers and we would rather say so.
Questions people ask
What is the best phone system for a small business?
There is no single answer, because the deciding factor is shape rather than quality. For one or two people who text customers, SoundLine or Quo. For several people on one number, Grasshopper. For a sales or support team, Dialpad or Aircall. For a procurement process, RingCentral, Nextiva or 8x8.
How much does a small business phone system cost?
Entry plans run roughly $15 to $30 per user per month before add-ons, fees and taxes. 8x8 publishes no prices at all. Expect the real invoice to exceed the headline, mostly through toll-free numbers, unlimited minutes, call recording and analytics.
Do I need a landline for my small business?
No. Cloud systems run over your internet connection and ring on apps, laptops and desk phones. A desk phone is still worth having at a counter or front desk; a landline is not required to have one.
Can a small business phone system work on mobile phones?
Yes. Most run as an app alongside your personal number, with its own greeting and ringtone, so the business number never has to be your mobile number.
What is the cheapest small business phone system?
On published entry pricing, Grasshopper from $14 a month flat rate for unlimited users, and several per-user plans at $14.99 to $15. The cheapest for you depends on headcount, because flat-rate and per-user pricing cross over at about two people.
Can one phone system handle two businesses?
On most platforms a second business means a second account. SoundLine gives each business its own number, greeting, routing and voicemail inside one account, on every plan.
If you want to see ours
Seven days, one local business number, every Growth feature switched on, no seat minimum and no contract.