The four genuinely free options
1. Google Voice, personal. A free US number that makes calls and sends texts, tied to a Google account. Genuinely good for person-to-person use. Its documentation describes messaging as one-to-one rather than bulk, it cannot send texts to five or six digit short codes, it does not offer toll-free numbers, and with more than one Voice number you can only send from your main one. Some services, banks among them, will not deliver texts to it at all.
2. A free trial of a paid platform. Most providers, including us, give you a real business number for seven to fourteen days at no charge. This is the best way to get a working number today if you are still deciding, and the worst way to run a business past the end of the trial.
3. A free tier on a smaller platform. Several apps offer a permanently free plan with a number, usually limited on minutes, texts or users. Read what happens at the limit: some stop, some charge, some restrict the account.
4. The number you already have. Your mobile. It is free in the sense that you are already paying for it. It is covered below, because it is the option most new businesses actually use.
The three costs that are not money
This is the part worth reading, because it is what decides whether free is cheap or expensive.
Deliverability. Business texting in the United States has to be registered with the carriers, under the framework called A2P 10DLC, which records who is sending and what they send. Registered traffic gets delivered. Unregistered traffic gets throttled, filtered or silently dropped. No bounce message is generated, so the sender never learns it happened.
Free consumer numbers have no business registration path. If you text customers from one, some proportion of those messages do not arrive and you will not know which. A founder can spend months assuming people are ignoring them.
Ownership. A free number provided as part of a consumer account is not an asset you control the way a business number is. It is tied to a personal login. It can usually be ported out, but the account itself is not built to be transferred, delegated, or handed to a colleague. If you ever sell the business, or hire someone to answer the phone, that matters.
Everything a number cannot do by itself. A greeting in your business's name rather than a generic one. Routing, so the call rings somewhere else when you cannot take it. Hours of business. A second person answering. A shared voicemail. A desk phone. The free options give you a number. Most of what makes a business phone useful is the layer on top of it.
When free is the right answer
Use a free number if: the number will only ever ring to you, you will not text customers at any volume, you do not need anyone else to answer it, and nothing about your business depends on a call connecting.
A sole trader with a side project, a consultant whose clients email, a seller who wants a number on a listing without exposing their mobile. These are real cases and free serves them properly. Paying for a platform you do not need is not an upgrade.
When free becomes the expensive option
The moment you text customers. Appointment reminders, confirmations, delivery updates. This is where unregistered numbers fail silently, and it is the single most common reason founders move.
The moment a second person answers. A partner, an assistant, a front desk. Free consumer numbers are built for one person.
The moment missing a call costs you a job. Routing, hours and voicemail that reaches you are not luxuries once the phone is how customers reach you.
The moment there is a second business. A second free number means a second inbox you forget to check.
And then there is your mobile
The option most new businesses actually use, and the one worth thinking about hardest, because it is the hardest to undo.
Your personal number follows you forever. It goes on invoices, forms, listings and vans. It cannot be handed to anyone else, it cannot be separated from you if you sell or close the business, and you cannot stop it ringing on a Sunday night. Separating it on day one costs a few dollars a month. Separating it in year three means telling every customer you have a new number.
If you do nothing else on this page, get a number that is not your mobile, even a free one.
What a paid number buys you
Said plainly, because this is our page and you should be able to weigh it.
Carrier registration handled for you, so your texts are delivered traffic rather than filtered traffic. A greeting and routing per business. Someone else able to answer. Desk phones when there is a desk. Video meetings and scheduling in the same subscription, which for most founders retires two other bills. A support line answered by a person.
SoundLine starts at $19.99 per user per month, or $14.99 on an annual plan. There is no free tier. We would rather charge a fair price than fund a free tier by limiting the thing you actually need. There is a seven-day trial with every Growth feature switched on, which is a real business number on a real network, not a sandbox.
If after reading this a free number is right for you, take one. It is a better outcome than paying us for something you do not need yet.
Questions people ask
Can I get a business phone number for free?
Yes. Google Voice offers a free US number, several platforms have free tiers, and most paid providers give you a free trial of seven to fourteen days. Each comes with limits on business texting, routing and the ability for someone else to answer.
What is the catch with a free business phone number?
Usually three things: business texting from an unregistered number is filtered or dropped without notice, the number is tied to a personal account rather than owned by the business, and there is no greeting, routing, or way for a second person to answer.
Is Google Voice good for business?
For a sole trader who does not text customers and does not need anyone else to answer, it works well and costs nothing. Its own documentation describes messaging as one-to-one rather than bulk, it cannot text short codes, and it offers no toll-free numbers, so it is a poor base for a business that texts customers or needs to look like a company.
Does SoundLine have a free plan?
No. There is a seven-day free trial with every Growth feature switched on, and pricing starts at $19.99 per user per month or $14.99 annually.
Why would I pay for a business phone number?
Because of what sits on top of the number: carrier-registered texting that actually arrives, a greeting in your business's name, routing so calls reach someone, desk phones, and a separate identity for each business you run.
If free is not enough any more
Seven days, a real business number on our own network, every Growth feature switched on.