6 Best VoIP Tools for Businesses Going Global

When you expand globally, your phone system must adapt along with you. A tool that's perfect for a sales team in Austin might fall apart the moment you try to give a French rep a local Paris number or run a call summary in Spanish.

Unfortunately, many popular VoIP tools don't work well internationally. Sometimes, they don't work at all. Nextiva, a household name in the VoIP space works great – but only if you’re operating in the US and parts of Canada. If you only learn this after signing a contract, you're stuck.

Whether you're selling abroad, supporting customers across time zones, or collaborating with an international team, the right phone system makes a real difference. We've picked 6 options worth a serious look, and we'll walk through what each one is best at, plus where it falls short.

Quick takeaways:

• Most popular VoIP providers (Nextiva, Ooma, Grasshopper) are built for the US and Canada only, so going global often means switching tools entirely.
• The biggest gotchas for international teams rarely involve advanced features. They come down to the basics: local number availability, multi-language AI, and whether your remote hire in Madrid can get set up in under an hour.
• We recommend Zoom Phone and Microsoft Phone for users already involved in the Microsoft and Zoom ecosystem, Allo for small teams who want strong AI features and transparent pricing, and Cloudtalk for teams who sell internationally.

Our Recommendations at a Glance

Common Challenges for International Teams with Their Phone Systems

Most buyers' regret when going global traces back to the same handful of issues, so it's worth knowing them before comparing tools.

Lack of local numbers

During our recent Next Market Live 2 : Spain, one of our panelists, Fleet, shared how important it was for them to use local numbers for their prospecting efforts.

As they explained, local numbers build trust, and they're often required to comply with local telecom regulations. A surprising number of VoIP providers cap you at US and Canadian numbers, or charge a hefty premium for international ones.

Unpredictable and/or expensive pricing

International calling rates can wreck a monthly budget. Some providers bury per-minute fees, others charge add-ons for AI features, SMS, or every extra number. By the time you tally it all up, the "$25/user" plan you signed up for costs 3 times as much.

Difficult onboarding for remote employees

If your new hire in Berlin needs an IT admin to walk them through provisioning, you've already lost a day. The best tools let someone download the app, sign in, and start making calls in 10 minutes. The worst require Windows-only desktop installs or multi-step license assignments across separate admin panels.

Lack of integration with everyday tools (mostly the CRM)

Your CRM is the source of truth. If your phone system doesn't push call recordings, transcripts, and contact updates into HubSpot, Salesforce, or Pipedrive automatically, reps will skip logging and your data quality will tank.

Hard-to-configure call routing rules

Routing a call to the right person across multiple offices, time zones, and languages is harder than it sounds. Some tools make this easy with visual flow builders. Others bury it behind admin menus that need a consultant to set up.

Now, let's review your options.

Best for Zoom-centric Teams: Zoom Phone

Zoom Phone launched in 2019 as a natural extension of the core Zoom product. If your team already lives in Zoom Meetings all day, adding Zoom Phone feels effortless: same login, same interface, same address book.

Why international teams like Zoom Phone

• Local numbers in 49 countries, which is solid global coverage.
• AI Companion supports 32 languages for transcription and post-call summaries.
• 195 native integrations in the Zoom marketplace, including HubSpot and Salesforce (though the HubSpot is rated 1.9/5 on the HubSpot marketplace).
• Smooth transitions between phone, video, and mobile which is useful if you're escalating a sales call into a Zoom meeting on the fly.

The downside: settings can be confusing, with lots of options and labels that aren't always intuitive (but if you’re a Zoom user, you must know this already). There's also no AI answering service or AI IVR, which is a gap if you want full automation.

Zoom Phone pricing

• US & CA Unlimited: $18/user/month.
• Pro Plus: $24/user/month (bundles Zoom Phone with Zoom Workspace).
• Business Plus: $29/user/month (adds SSO and larger meeting capacity).

International rates depend on the destination, so check the Zoom pricing page for the country-by-country breakdown.

Best for Small International Teams: Allo

Allo is a newer AI- and mobile-first phone system, launched in 2024 and headquartered in Miami. It's built specifically for small teams, SMBs, and sales teams who don't want to wrestle with enterprise software.

The pitch is simple: get a phone system that works on your phone first, comes with AI baked in, and doesn't surprise you with add-ons.

Why international teams like Allo

A few things stand out for teams operating across borders:

• The AI answering service speaks French, Spanish, and English, and the app itself is available in all three. AI transcription supports 36 languages, which covers most teams.
• Mobile-first onboarding. A new hire downloads the app, signs in, and is taking calls in minutes –  no IT admin required. The desktop app works the same way.
• CRM integrations that actually sync the important stuff. Native HubSpot, Pipedrive, Salesforce, Attio, Notion, and Zoho integrations push call recordings, transcripts, and contact updates automatically. The HubSpot integration is rated 5/5 on the HubSpot marketplace, which is rare in this category.
• No add-ons. AI features, SMS, and international calling are all included in the Business plan.
• Transparent pricing: Allo publishes their international calling rates on their website. No need to contact their CSM or sales team.

The trade-off: Allo is newer and not really designed for large enterprises with hundreds of agents or complex contact-center workflows.

Allo pricing

• Starter: $25/month for one user. Includes unlimited domestic calls, a local number, AI summaries, and IVR.
• Business: $45/user/month. Adds CRM integrations, unlimited AI answering service, SMS, and international calling.

Additional phone numbers are $5/month each. There's a 7-day free trial and no setup fees. International call rates are published on Allo's pricing page.

Best for Microsoft 365 shops: Microsoft Teams Phone

If your company is all-in on Microsoft 365, Microsoft Teams Phone is the obvious default. Calling lives inside Teams, contacts sync from Outlook, and AI features run through Copilot.

Why international teams like Microsoft Teams Phone

• Local numbers in 30+ countries.
• Copilot AI supports 41 languages for live transcription.
• Tight integration with the rest of Microsoft 365:  Outlook contacts, Teams chat, calendar.
• Reliable call quality and a clean UI once it's set up.

The catch is real, though. Setup is notoriously complex: you typically need a Microsoft 365 license, then a Teams Phone license, then a calling plan (3 separate purchases), and the admin experience bounces you between Microsoft 365 and Teams Phone settings with no guidance. Plan on IT admin involvement.

AI features also cost extra; Copilot is a separate $30/user/month add-on. CRM integrations lag behind dedicated VoIP tools (the HubSpot integration gets 3.3/5), and there's no native Salesforce integration.

Microsoft Teams Phone pricing

• Teams Phone Standard: $10/user/month (requires a separate calling provider).
• Teams Phone with pay-as-you-go calling: $13/user/month.
• Teams Phone with Calling Plan: $17/user/month (includes 3,000 outbound domestic minutes in US/UK/Canada).

Add a Teams license (from $4/user/month) and Copilot ($30/user/month) on top. International rates are published in the Microsoft 365 admin center.

Best for Sales and Support Teams: CloudTalk

CloudTalk was founded in Slovakia in 2016 and now serves 4,000 customers across 100 countries. It's built specifically for sales and support teams, including small contact centers.

Why international teams like CloudTalk

• Local numbers in 160+ countries, one of the widest coverage maps in the category.
• Automatic local-number switching when calling out, so prospects see a familiar area code.
• 70 native integrations, including Salesforce, HubSpot (rated 4.3/5 on the HubSpot marketplace), Pipedrive, Zoho, Odoo, and more.
• Four call routing options (Ring All, Round Robin, Random, Least Recent) configurable at the ring-group level.
• A clean, easy-to-use interface.

The downsides: call quality can be inconsistent depending on geography, and customer support response times draw complaints. Voice agents are also billed separately.

CloudTalk pricing

• Lite: $27/user/month. Unlimited domestic calls and local numbers, but most features locked.
• Essential: $39/user/month. Adds IVR, ring groups, and integrations.
• Expert: $69/user/month (3-license minimum). Adds power dialer, live monitoring, and WhatsApp support.

There's a 14-day free trial with no credit card required. International rates aren't listed publicly, so you'll need to reach out to their support team directly.

Best for Established Sales Teams: Aircall

Aircall started in Paris in 2014 as a challenger to hardware-based phone systems and has grown into one of the most recognized brands in the space. It's a safe, established choice, especially if you've already invested in Salesforce or HubSpot.

Why international teams like Aircall

• Local numbers in 38 countries.
• Deep CRM integrations with HubSpot, Salesforce (advanced), Attio, Pipedrive, Zoho, Intercom, and more. The HubSpot integration scores 4.3/5 on the HubSpot marketplace.
• Recognized, trusted brand that is easy to defend internally.
• Strong call routing (random, simultaneous, longest idle).

A few important caveats: AI features are limited to English and French only, which is a hard ceiling if your team operates in German, Italian, or Portuguese. There's a 3-license minimum, which makes it pricey for very small teams.

Aircall pricing

• Essentials: $40/user/month (3-license minimum). Local number, unlimited US/Canada calling, IVR, call recording.
• Professional: $70/user/month. Adds advanced analytics, power dialer, voicemail drop.

AI Voice Agent ($0.49/min), WhatsApp ($10/user/month), and Analytics+ ($15/user/month) are add-ons.

Unfortunately, Aircall doesn’t list their international calling rates publicly and recommends to get in touch with their team to anticipate your costs.

Best for Large Contact Centers: 8x8

8x8 has been around since 2000 and is built for contact centers and larger enterprises. If you have hundreds of agents, supervisor dashboards, and complex compliance needs, this is the kind of tool that fits.

Why international teams like 8x8

• Local numbers in 100+ countries.
• 75 native integrations, including Salesforce, Pipedrive, Zoho, ServiceNow, and HubSpot (though the HubSpot integration scores poorly at 1.6/5).
• Bulk engagement campaigns via text-to-speech, SMS, and messaging apps.
• Power dialer, agent supervision tools, detailed analytics –  the contact-center toolkit you'd expect.

The challenges are real: 8x8 is complex to configure (one reviewer flat-out said "the configuration process is difficult to handle independently"), pricing isn't public for the upper tiers, cancellation is reportedly painful, and several users complain about support quality. This is not a tool for small teams. But if you have a large team, 8x8 could be a good choice.

8x8 pricing

Pricing isn't public anymore. Reported tiers start around $24/user/month for the entry plan and $44/user/month for a more complete plan. You'll need to talk to sales for an accurate quote, and international rates are quoted on a per-deal basis.

3 Tips to Find the Right VoIP for Your Team

Picking a phone system isn't just about feature lists ; it's about whether the day-to-day experience holds up when your team is spread across continents.

Check the user onboarding process

Before you sign anything, sign up for the free trial and time how long it takes to: download the app, port (or buy) a number, and place your first call. If it takes longer than 30 minutes for a non-technical user, imagine doing that for every new hire abroad. Bonus points if there's no IT admin in the loop.

Check the international call rates and focus on your popular destinations

Don't just look at the headline per-user price. Look at the per-minute rates for the five countries your team actually calls the most. Some providers are cheap for US/Canada and surprisingly expensive for places like Brazil, India, or Italy. A 90-second call to a mobile number in Argentina can cost more than a 10-minute call across the US.

Make sure they support local numbers and multiple languages for the AI features

Two checks here. First: confirm they actually offer local numbers in every country your team operates in (and read the fine print on documentation requirements, some countries require a local address). Second: if you rely on AI for transcription, summaries, or an answering service, make sure your team's languages are supported. An AI receptionist that only speaks English will frustrate half your callers.

Conclusion

There's no single "best" VoIP for going global –  the right pick depends on the size of your team, the countries you're operating in, and the tools you're already using.

• If you're a small or mid-sized team that wants something that just works (with AI and CRM sync included), Allo is the strongest fit.
• If you're already deep in Zoom or Microsoft 365, Zoom Phone and Microsoft Teams Phone are natural defaults, just budget for the setup time and Copilot costs respectively.
• If you need wide country coverage and a sales-team feature set, CloudTalk and Aircall are both proven options (CloudTalk wins on geography and price; Aircall wins on brand and CRM depth).
• If you're running a large contact center, 8x8 has the toolkit, but expect a heavier implementation.

Whatever you pick, run a trial first. Test it from the country you're hiring into, not just from your HQ. The gap between a VoIP that technically supports a country and one that actually works well there is bigger than vendor brochures admit.

A phone system is one piece of going global. Your website is another, and that's the part we know best. Weglot makes your site multilingual in minutes, so customers in every market hear from you in their own language. Start your 14-day free trial and see how easy it is to go multilingual.