What usually happens instead
Numbers accumulate. The personal cell everyone already has. A second line for the second company that nobody checks. A number from four years ago that still rings somewhere. A Google Voice number set up in an afternoon and never sorted out.
The founder becomes the routing layer. They answer every call without knowing which company is calling, work out who they are supposed to be in the first two seconds, and carry four apps to do it.
Most platforms treat a second business as a second account. A second subscription, a second bill, a second login, a second app on the home screen, and a second place to forget to check voicemail. That is not a product decision anyone made on purpose. It is what happens when a system designed for one company with many employees meets one person with many companies.
What a separate identity actually means
Each business you run gets its own:
- Phone number, local to wherever that business is
- Greeting, in that business's name, so the caller hears the right company
- Routing, so the right phone rings, in the right order, during that business's hours
- Voicemail box, kept separate, transcribed and sent where you want it
- Business hours and holiday schedule, because a restaurant and a consultancy do not keep the same week
- Caller ID, so your outbound calls carry the right company's name
All of it in one app, behind one login, on the phone already in your pocket. You see which business a call is for before you answer it, which is the part that actually changes the day.
Who this is for
Serial founders. Each new company needs a communication presence on day one, without starting a new vendor relationship to get it.
Anyone running a business and a second thing. A practice and a property company. An agency and a product. A main business and the one that is not ready to be announced yet.
Multi-location operators. Central control, site-level flexibility, one place to manage it from.
Holding companies and portfolios. Several trading names under one roof, each one needing to look like itself to its own customers.
How it compares
Compared against each provider's published pricing and documentation, 22 October 2026.
| SoundLine | Most alternatives | |
|---|---|---|
| Second business | Same account, separate identity | Usually a second account and a second bill |
| Which tier it needs | Every plan, including Starter | Varies, often a higher tier |
| Extra numbers | $4 on Growth, $5 on Starter | $5 to $9 each depending on provider |
| Greeting and routing per business | Yes | Varies |
| One app for all of them | Yes | Usually one app per workspace |
| Knowing which business is calling | Before you answer | Depends on the setup |
Worth saying plainly: several providers will let you hold more than one number. Holding numbers is not the same as running more than one business. The question is whether each number has its own greeting, its own routing, its own hours and its own voicemail, and whether you can tell them apart when the phone rings.
What it costs
From $19.99 per user per month, or $14.99 on an annual plan, with multi-business support on every tier including the entry one. Additional numbers are $4 each on Growth and $5 on Starter. Card payments carry a 2.75% processing fee, which we put on the page rather than in a footnote.
Each business is its own account and is billed separately, at the same published per-user rates. Three businesses with one person each come to $99.99 a month on monthly billing, or $74.97 a month on annual billing, before fees and taxes. We are not going to pretend that running three businesses costs the same as running one.
What you are not paying for is a premium on top of that for the privilege of running more than one, and what you get for free is the part that actually costs you time: one login that reaches all of them, so you never sign out of one company to answer the other one's phone.
When this is not the answer
If you run one company and expect to keep running one company, most of the argument above does you no good. Choose on the things that will actually matter to you: price, texting, desk phones, support, how fast you can get started. Those pages are linked below and they are written the same way.
Questions founders ask
Can I run two businesses from one phone system account?
Yes. On SoundLine each business gets its own number, greeting, routing and voicemail inside a single account, on every plan including the entry tier.
Do I need a separate subscription for each business?
No. You pay per user, not per business. Additional numbers are $4 each on Growth and $5 on Starter.
Will I know which business someone is calling before I answer?
Yes. The call shows which business line it arrived on, so you answer as the right company.
Can different businesses have different hours?
Yes. Business hours, holiday schedules and routing are set per business.
What if the two businesses are in different cities?
Each one can carry a local number for its own city.
Try it with both businesses
Seven days, a real business number, every Growth feature switched on. Set up the second identity during the trial and see it working before you decide.