The short version: You can get a free business telephone number in the UK or US using services like Google Voice, 03 numbers via VoIP providers, or virtual number apps like Hushed and Sideline. Most free tiers are perfectly usable for a solo business or startup, though you'll hit limits if you want things like call recording or SMS marketing.
I ran my business for years without a dedicated business number. I just used my personal mobile. And every single time a client rang at 9pm on a Sunday, I'd pick up because I couldn't tell if it was work or my mate calling about dinner plans.
That's not a boundary problem. That's a systems problem.
Getting a separate business telephone number fixed it immediately. And the bit most people don't know? You don't have to pay for one. Not a penny, especially when you're starting out.
Here's exactly what's available, what the real limitations are, and which option I'd pick depending on where you are and what you need.
Why a separate business number matters more than you think
It's not about vanity. It's about a few very practical things:
- You can turn it off outside working hours
- Clients and suppliers don't have your personal number
- You look more established to new clients from the very first call
- You can forward it to any device, so you're not tied to one phone
- You can hand it over to a VA or team member without giving them your personal mobile
That last one matters. I've handed a business number to a virtual assistant before without a second thought. I would never hand over my personal mobile number. The separation is the whole point.
Free business telephone number options in the UK
03 numbers via virtual VoIP providers
In the UK, 03 numbers are non-geographic, cost the same to call as 01 or 02 numbers, and are included in most people's mobile minutes. They read as professional without the slightly dated feel of an 0800 freephone.
Providers like VirtualLandline.co.uk and Cloudya by NFON offer free trials or free tiers. VirtualLandline's basic plan starts free and forwards calls to your mobile. You get a real UK number instantly.
Vonage (now owned by Ericsson) and bOnline also offer UK VoIP numbers with free trials. bOnline is specifically aimed at UK small businesses and is worth a look if you want a longer-term solution, though their paid plans start at around 5 to 6 pounds a month once the free period ends.
Google Voice (limited UK use)
Technically Google Voice is available in the UK but only for Google Workspace accounts, which means you'd need a paid Google plan. For most solo UK operators, this route is more faff than it's worth.
Skype Number
You can get a Skype number with a UK area code for about 18 pounds a year, which is almost free. Not technically free, but close enough to mention. The advantage is that people can call it from a regular phone and it rings on your Skype app.
Free business telephone number options in the US
Google Voice
This is the gold standard for US users and it is free for personal use. You pick a number from available options, it forwards to your mobile, you can text from it, and you can use the app or the web interface. For a solo freelancer or very small business in the US, this will cover most of what you need at zero cost.
The free version does not include call recording, auto-attendant, or integrations with CRM tools. For those, you'd step up to Google Voice for Google Workspace at 10 dollars per user per month.
Sideline
Sideline gives you a second phone number on your existing phone, uses your existing carrier's network (so call quality is exactly what you're used to), and has a free tier. The free tier is limited on features but works well for basic call and text separation. Paid plans run around 9.99 dollars a month.
Hushed
Hushed is more privacy-focused and offers temporary or long-term numbers. They have a free tier with limited minutes. Good for testing the concept before committing. Not ideal as a permanent business number because the free allowance is very small.
TextNow
TextNow is largely ad-supported and gives you a US number for free. Calls and texts are free over WiFi. Call quality can be patchy. Honestly, I'd use this only as a last resort or as a temporary number while you decide what you really want.
OpenPhone free trial
OpenPhone is one of the better-known US business phone apps. No permanent free tier, but a seven-day free trial that lets you test a real business number with voicemail transcription and integrations. Paid plans start at 13 dollars per user per month. Worth trialling to see if the paid version makes sense for your business.
Free options that work in both the UK and US (or for global businesses)
WhatsApp Business
Not a traditional phone number solution, but WhatsApp Business gives you a separate business profile on your existing number (or on a second SIM). It's free, professional-looking, and enormous numbers of clients now prefer WhatsApp for business communication over a traditional call. I use it. It works. Don't dismiss it just because it doesn't feel "official."
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Zoom Phone
Zoom Phone has a free basic tier for internal calls. For a business that already runs on Zoom, adding a Zoom Phone number is logical. Outbound calls to regular phone numbers require a paid plan, but internal team calls are free.
The real catches with free business numbers
I'm not going to pretend there are no limitations. Here's what the free tiers typically won't give you:
- Call recording (almost always a paid feature)
- Voicemail transcription (usually paid, though Google Voice includes basic transcription free)
- Auto-attendant or IVR menus ("press 1 for sales")
- SMS marketing or bulk texting
- CRM integrations
- Multiple team members using the same number
- Number porting if you decide to switch providers
For a freelancer or a one-person business, none of those limitations will hurt you in the first year. Start free, upgrade when the lack of features is costing you more than the subscription would.
What I'd do if I were starting over right now
If I were launching a new business tomorrow, this is exactly what I'd do:
- UK-based: Get a free 03 number from VirtualLandline, forward it to my mobile, set up a voicemail greeting that sounds professional, done.
- US-based: Set up Google Voice immediately. It's free, it's reliable, and it integrates with Gmail which most people already use.
- International or both markets: Get a UK virtual number AND a Google Voice US number. Both free. Both forward to the same mobile. Total cost: zero.
Then once the business is generating consistent revenue, I'd migrate to something like OpenPhone or RingCentral where I can add a team member without starting from scratch.
The mistake I see new business owners make is spending time researching the perfect phone system before they've made their first sale. Get the free number today. Make the sale. Upgrade later.
What I Tell Clients Who Ask Which Free Number To Pick
I get this question at least once a month from people in my email list, so here is my honest take rather than a features list. If you are a solo consultant or coach who mostly takes calls and does not need a big team inbox, I point people to Google Voice if they are US based, because it ties into a Gmail account most people already check fifty times a day. The number stays free, you get voicemail transcription, and you can screen calls before answering. The catch nobody mentions: Google Voice numbers get flagged as spam risk by some carriers if you use them for a lot of outbound cold calling, so I would not build a sales team's dialer around one.
If you are outside the US or you need a proper business phone system with call routing, I have set clients up on the free tier of Grasshopper's competitors like TextNow or, more often, the free trial of a VoIP provider such as OpenPhone, which gives you 30 days before billing kicks in. That is enough time to test whether a toll free or local number gets more pickups. In one case with a UK based client selling into the US, we tested a local area code number against a toll free 800 number for two weeks each. The local number got a 22 percent higher answer rate on cold outreach calls, likely because people are wary of 800 numbers assuming it is a call center.
- Google Voice: best for solo founders, free forever, weak for team routing
- OpenPhone free trial: best for testing local vs toll free before committing
- TextNow: fine as a backup line, but call quality drops on weak wifi more than the others
One thing I wish someone had told me years ago: whichever free number you pick, put it on your Google Business Profile immediately, not just your website. I moved a client's Voice number onto their GBP listing and their call volume from Google Maps searches jumped noticeably within about three weeks, simply because the number became clickable on mobile search results. The free number is not just for looking professional in email signatures, it is a discovery tool if you place it where local search traffic lands.
Frequently asked questions
Can I get a free UK business phone number without a contract?
Yes. Providers like VirtualLandline offer free tiers with no contract, giving you a UK 03 number that forwards to your mobile. You sign up online in minutes and there's no obligation to move to a paid plan.
Is Google Voice free for business use?
Google Voice is free for personal use in the US and includes a real phone number, voicemail, and calling. For business features like multi-user access and CRM integration, plans start at 10 dollars per user per month. For a solo operator, the free personal account works well for basic business use.
What's the difference between a virtual number and a VoIP number?
A virtual number is a telephone number not tied to a physical phone line or device. VoIP (Voice over Internet Protocol) is the technology that often powers virtual numbers, routing calls over the internet instead of a traditional phone network. Most free business numbers are both virtual and VoIP.
Can I use a free business number for WhatsApp Business?
Yes, but with a catch. WhatsApp Business requires you to verify the number via SMS or a phone call. Virtual numbers that support SMS verification will work. Numbers that only receive calls (not texts) won't complete the WhatsApp verification process, so confirm SMS support before choosing your free number for this purpose.
Related reading: How to Start a Virtual Assistant Business in 2026 (Without the Burnout) and Work From Home as a Virtual Assistant: What You'll Earn and How to Land Clients.
