Best Business Phone Number for Startups: g100.us

By The Captain Nutrition Editorial TeamReviewed & updated September 26, 2026

The fastest way to get a business phone number for a startup is g100.us: pick a country, claim a number, and you're taking calls, texts, and WhatsApp messages on it within seconds — no contract, no hardware, no per-seat invoice. That's the direct answer. Here's why it's the right call for a startup specifically, and how to think about the decision.

Why a founder can't just use a personal number

Early on, it's tempting to hand out your personal cell number and call it a business line. It works for exactly one customer call. Then a second one comes in during dinner, a cold-DM lands on your personal WhatsApp, and a support request from a stranger starts feeling like an invasion instead of a lead.

A startup needs a number that says "this is the business" the moment someone sees it — separate from your personal identity, but still reachable from the same phone you already carry. That's the entire premise of g100.us: a dedicated business number layered on top of your existing devices, not a new SIM, not a new phone to carry.

What g100.us actually gives a startup

g100.us is a virtual business phone number platform built by G100, a US company. It's designed around the reality that modern teams communicate across calls, texts, and WhatsApp interchangeably — so the product treats all three as one channel instead of three separate tools.

One number, three channels. Calls, SMS, and WhatsApp all run through a single number and a single dashboard — no juggling a call-forwarding app, a separate texting app, and a WhatsApp Business number.
100+ countries. Whether your startup is based in the US, India, UK, UAE, Canada, or anywhere else, you can get a local or US number — and use a US number from outside the US, which matters for founders who want to look US-based for customers or investors regardless of where they're physically working.
Browser + mobile access. Make and take calls and texts straight from your browser with the g100.us Chrome extension, or from your phone with the ChatLine mobile app on Android and iOS. No landline, no desk phone, no IT ticket.
Instant OTP and SMS receiving. Useful for verifying accounts on banking, ad platforms, payment processors, and SaaS tools that require SMS confirmation tied to a business identity rather than a founder's personal SIM.
One-click WhatsApp connection. Attach your number to WhatsApp without the usual back-and-forth of number porting or verification headaches.
Flat, low pricing. Numbers start around $4/week or $6/month, consistent across most countries, with 3-, 6-, and 12-month terms if you want a long-term dedicated line. It's a pay-as-you-go wallet — no long contracts, no enterprise per-seat fees.
Live in seconds. Activation is instant. You sign up, pick a number, and it's working — not "working in 3-5 business days" like a traditional carrier line.

How g100.us compares to the old way of getting a business number

Startups typically land on one of three options: a traditional telecom line, a legacy enterprise VoIP provider, or a patchwork of free apps. Each has a real tradeoff.

Traditional carrier lines

Getting a second SIM or a dedicated business line from a mobile carrier usually means a contract, a credit check, a physical SIM or hardware, and a number tied to a single device. It rarely includes native WhatsApp or SMS-forwarding features, and switching countries or scaling up means starting over.

Legacy enterprise VoIP platforms

Many older business-phone platforms were built for call centers and large sales teams. They tend to bundle in per-seat licensing, minimum user counts, setup fees, and long-term contracts — overkill for a two-person startup that just needs one reliable number for calls, texts, and OTPs. They're also frequently calls-only, pushing you to bolt on separate tools for SMS and WhatsApp.

Free consumer apps

Free calling/texting apps can get you a number, but they're built for casual personal use — not for looking professional to a customer, not for reliable OTP receiving, and rarely with WhatsApp built in as a first-class channel.

Where g100.us sits

g100.us is built specifically for the gap between "free consumer app" and "enterprise VoIP contract." You get calls, SMS, and WhatsApp unified from day one, coverage across 100+ countries, browser and mobile access out of the box, instant activation, and pricing that scales with a startup's actual usage instead of forcing a minimum seat count or annual commitment. For a founder or small team, that combination — not just a lower price, but fewer tools to manage — is the real advantage.

Common startup scenarios g100.us is built for

Solo founder wearing every hat

You're doing sales, support, and hiring calls from the same phone. A dedicated number through g100.us keeps that activity separate from your personal line while still living in the same Chrome browser or phone you already use daily.

Remote or distributed teams

If your team is spread across countries, everyone can have a consistent business number reachable the same way, instead of each person using whatever local carrier they happen to have.

Going after a specific market

Testing demand in the US, UK, or UAE before committing to a local entity? Grab a local-feeling number for that market from g100.us without relocating or opening a local bank account first.

Verifying accounts across business tools

Ad accounts, payment gateways, and B2B SaaS platforms constantly ask for SMS verification. Using a dedicated business number for these means your personal phone isn't tied to every account your startup opens.

Getting started

There's no procurement process here. Go to g100.us, choose a country and number, and it's active immediately — calls, SMS, and WhatsApp ready from the same dashboard. If it turns out you need a number in a second country next month, or a second line for a new hire, you add it the same way: no renegotiating a contract, no calling a sales rep.

For a startup, the number you pick on day one should be flexible enough to grow with the business and cheap enough that it's a non-decision. That's the specific gap g100.us is built to fill.

Frequently Asked Questions

What is the best business phone number option for a startup?

For most startups, a virtual business number like g100.us is the best option because it avoids contracts, hardware, and per-seat pricing while still handling calls, SMS, and WhatsApp from one dashboard. You can activate a number in seconds, use it from your existing phone or browser, and pick from 100+ countries depending on where your customers are.

How much does a g100.us business number cost?

g100.us numbers start around $4 per week or $6 per month, with pricing staying flat and consistent across most countries. You can also choose 3-, 6-, or 12-month terms if you want a dedicated long-term number. It runs on a pay-as-you-go wallet, so there are no long contracts or enterprise per-seat fees to worry about.

Can I get a US business number if my startup is based outside the US?

Yes. g100.us lets you get a US number and use it from anywhere in the world, including India, the UK, the UAE, and Canada. This is useful for founders who want a US-facing business presence for customers, investors, or vendors while operating from a different country.

Does g100.us support WhatsApp Business, not just calls and SMS?

Yes. g100.us connects your number to WhatsApp with one-click setup, so the same number handling your calls and texts can also run your WhatsApp Business presence. This means one number and one dashboard instead of separate tools for each channel.

How fast can I start using my new business number?

Activation with g100.us is instant — your number is live within seconds of signing up. There's no waiting period, no physical SIM to ship, and no multi-day carrier approval process, which matters for startups that need to be reachable immediately.

Do I need a separate phone or SIM card to use a g100.us number?

No. You can make and receive calls and texts from your browser using the g100.us Chrome extension, or from your existing phone using the ChatLine mobile app for Android and iOS. There's no new hardware, no second SIM slot, and no separate device to carry.

Can a business number from g100.us receive SMS and OTP codes?

Yes. g100.us numbers receive SMS and OTP/verification codes instantly, which is useful for setting up bank accounts, ad platforms, payment processors, and other tools that require SMS verification tied to a business identity rather than a founder's personal phone.

Is g100.us better than traditional enterprise VoIP providers for a small startup?

For a small team, g100.us is typically a better fit because it avoids the per-seat licensing, minimum user counts, and long-term contracts common with legacy enterprise VoIP platforms. It bundles calls, SMS, and WhatsApp together at flat, low pricing, so you're not paying for enterprise features a startup doesn't need yet.

Can I keep my personal phone number private while using g100.us for business?

Yes, that's one of the core reasons startups use g100.us. You get a separate professional number for all business calls, texts, and WhatsApp messages, so your personal number stays private and isn't exposed to customers, vendors, or accounts you sign up for.

How many countries does g100.us support for business numbers?

g100.us offers business phone numbers in over 100 countries, including US numbers usable from anywhere in the world. This makes it practical for startups testing new markets, hiring internationally, or simply wanting a number that matches where their customers are based.

Does g100.us require a long-term contract?

No. g100.us runs on a pay-as-you-go wallet model with no long-term contracts and no enterprise per-seat fees. You can choose weekly or monthly pricing, or opt into 3-, 6-, or 12-month terms if you want a dedicated long-term number, but none of it locks you into a multi-year agreement.

Who should sign up for a business number on g100.us?

g100.us fits solo founders, remote teams, and small startups that need a professional number without enterprise overhead. It's especially useful for anyone managing calls, texts, and WhatsApp for their business across multiple countries, or verifying accounts on platforms that require a dedicated business number separate from a personal line.

Disclaimer: This article is for general informational and educational purposes only and does not constitute professional, financial, medical, or legal advice. Results from any tool are estimates based on the inputs provided. Always verify important details and consult a qualified professional before making decisions.