Google Voice is a good place to start. Here is where it stops.
Nearly every founder's first business number is a free one. It works, it costs nothing, and for a while that is exactly the right trade.
What usually ends it is one of five things.
Texting that does not arrive. Business texting in the United States requires carrier registration. Without it, messages are filtered or silently dropped, and nobody tells the sender. A customer who never replied may never have received anything.
No one else can answer. A second person, a front desk, an assistant, a partner. The moment a number needs to ring somewhere other than your own pocket, a personal line stops being enough.
No routing. No auto attendant, no hunt group, no hours of business, no "press 2 for billing." Calls arrive or they do not.
No desk phone. Front desks, exam rooms, workshops and counters still want a handset.
A second business. A new company needs its own number, its own greeting and its own voicemail. A second free number means a second inbox you forget to check.
What SoundLine gives you instead
| Google Voice | SoundLine | |
|---|---|---|
| Business number | Personal-grade | Local business number, yours |
| Business texting | Limited, unregistered | Registered with the carriers, handled for you |
| Several people on one number | Limited | Extensions, routing and hunt groups |
| Auto attendant and IVR | No | Included on Growth |
| Desk phones | No | Provisioned |
| Video meetings | Google Meet, separately | Included, up to 200 participants |
| Appointment scheduling | No | Included |
| Call recording and transcription | Limited | Included on Growth |
| Several businesses, one account | No | Separate identity for each |
| Someone to call | No | US-based phone support on Growth |
| Price | Free to low | From $19.99 per user, $14.99 annual |
Compared against Google Voice's published consumer and Workspace documentation, 22 October 2026.
The part most people find out the hard way
Business texting needs carrier registration, and messages fail silently without it.
US carriers require any business texting from a standard number to register who they are and what they send. Registered traffic is delivered. Unregistered traffic is throttled, filtered or dropped, and no bounce message is generated.
A founder can spend months wondering why customers do not reply.
SoundLine handles registration for you. On a trial, texting runs under our platform registration so you can try it the same day, capped at 50 messages. After you convert, we register your business properly. There is a short carrier activation wait on a new number, usually about 15 minutes, and we email you when it clears.
Moving over
Keep your number. Porting a number to SoundLine is free and your current number keeps working throughout. Start the trial on a new number, satisfy yourself the service is right, then port afterward. Your existing number keeps working the whole time because you have not touched it.
Do not cancel the old service first. A closed account releases the number, and a released number may be unrecoverable. Keep it running until the port completes and you have made a test call.
When Google Voice is still the right answer
If you are a sole trader who needs one extra number for occasional calls, nobody else answers it, you do not text customers, and you do not need routing, Google Voice does that for free and you should keep it. Paying for a platform you do not need is not an upgrade.
Move when the phone starts carrying the business rather than sitting beside it.
Questions founders ask
Can I keep my Google Voice number?
Usually. Google Voice numbers can generally be ported out. Start the trial on a new number and port afterward.
Is there a free version of SoundLine?
No. There is a 7-day free trial with every Growth feature included. We would rather charge a fair price than fund a free tier by limiting the thing you need.
How long until I can make a call?
Under five minutes from signing up. Pick your number, name your extensions, dial.
Will my texts actually get delivered?
Yes, because we register your business with the carriers rather than leaving it to you.
Can I run two businesses from one account?
Yes. That is what the platform is built around. Separate number, greeting, routing and voicemail for each.
Try it on your own number
Seven days, a real business number, every Growth feature switched on. Card required, not charged until the trial ends.