Best Business VoIP Providers in Japan

CallTools is a powerful Business VoIP solution built for high-volume sales and support teams. With a cloud-based infrastructure and enterprise-grade reliability, it delivers crystal-clear call quality, robust scalability, and the tools needed to drive conversations at scale. Manage both inbound and outbound calls from a single platform with smart queuing, IVR, and call routing. Our built-in CRM and real-time analytics help teams improve contact rates, close deals faster, and stay compliant. Easily connect with your favorite tools through native integrations and open API. Whether you’re managing a growing team or optimizing a contact center, CallTools simplifies operations and boosts performance with advanced call control, auto dialers, live monitoring, call recording, and more. Backed by U.S.-based support, CallTools empowers teams to make more meaningful connections and convert more leads with every call. Ideal for remote and hybrid teams looking for flexibility and results.

Thirdlane is a scalable UCaaS platform that blends multi-tenant PBX, Contact Center, and collaboration apps into one solution. MSPs, Enterprises, and telecom providers adopt Thirdlane when they want freedom of deployment, deep integrations, and reliable control over their communications stack. Whether your team prefers cloud-hosted services or on-premises deployments, Thirdlane adapts to your strategy. IT departments appreciate the API-first design, while business leaders value the ability to cut costs and avoid lock-in. Core benefits: - Enterprise-grade PBX with calling, video meetings, voicemail, and advanced routing. - Unified Thirdlane Connect apps for chat, video meetings, and file sharing. - Built-in Contact Center - Advanced analytics to improve service and sales. - CRM integration for context-rich customer interactions. - White-label branding across all user touchpoints. - Options for geo-redundancy and high availability.

Powerful Cloud Telephony for Global Businesses Zadarma offers a feature-rich VoIP platform designed for businesses that want flexibility, scalability, and professional communication without high costs. Set up your cloud PBX in minutes, manage international teams, and serve customers worldwide — all from a single interface. Key features: - Virtual phone numbers in 110+ countries - Free cloud PBX with IVR, call routing, and analytics - Integration with CRMs: HubSpot, Zoho, Bitrix24, and more - Apps for desktop, mobile, and browser-based calling - AI-powered voice agents and call tracking - Full control via web interface and API Ideal for remote teams, support centers, and growing companies looking to modernize their phone systems.

See how the developer friendly Telnyx API can transform your business communications. Telnyx is an all-in-one communication platform designed to be tailored exactly to your needs. We created our network with real-time communications in mind so we can deliver quality calls, messaging, and data around the world. Easily build reliable messaging with our SMS API. Keep your data safe by setting up two-factor authentication using SMS or voice codes. Plug and play your VoIP setup in minutes and get carrier-grade voice with elastic SIP trunks. Our cloud-agnostic approach means you can rest easy knowing you are protecting in case of a network failure. With Telnyx deploy communications exactly to specifications.

Bria is a softphone solution designed to extend the capabilities of your call server, PBX, or VoIP service so you can take calls anywhere on both desktop and mobile devices, and augment your communications with team messaging, HD video conferencing and screen sharing capabilities, hosted by CounterPath. Experience crystal clear audio and HD, 1080p video calls whether in your office or on-the-go; and manage calls easily with intuitive call recording, music on hold, and call transfer functions. Need more collaboration features? Bria Teams and Bria Enterprise include team messaging, screen sharing, and HD video conferencing with up to 200 participants! Easily talk, chat, meet, and share on any device in one efficient app that syncs calling and messaging history across devices so you're always in the loop. Check out counterpath.com for more details!

Buy toll-free numbers and local phone numbers from more than 160 countries without commitment. You can route incoming calls to any phone, PBX, or SIP worldwide. Our global network has multiple layers of redundancy. Make international outbound calls and show any of your business phone numbers as Caller ID. Connect our SIP trunks to your phone system or use the GCF softphone to make outbound calls. Easily set up and modify smart call routing features like auto-attendant / IVR, location & time-based routing, local ringback tones, simultaneous ring, customized greetings, call recording, voicemail, and more. Easily add or remove virtual numbers, change calling plans, download your invoices and call detail records, modify advanced features, reach live technical support 24/7, and contact your account manager.

VoIP Office, a leading provider of Cloud based communications, makes it affordable and easy to connect to anyone, anywhere in the world. Our communications solutions meet the needs of any type of business in any industry, from home offices to large enterprises. VOIP OFFICE is a new-generation cloud based communications provider that offers all the features of your traditional PBX along with the latest functionality enabled by the use of VoIP technology. VoIP Office integrates easily with your business applications, seamlessly integrating your desktop and your office into one interconnected system.

From startups to enterprises, companies worldwide rely on Telzio for mission-critical phone services. Easy to deploy, manage, and scale. Telzio Call Flows will have you up and running with a complete business phone system in 5 minutes. Our interface gives you complete control so you don't have to call a tech to make a change to your phone system. It's so easy, you can do it yourself. Expect great customer service from our team, dedicated specialists who know your account, and fast response times you can count on.

With video collaboration software, mobile capabilities, and a best-in-class streamlined quote-to-cash solution, Viirtue transforms white label VoIP & UCaaS so you can compete with the big players and easily scale your business with modern tools and excellent support. Rebrand our full suite of white label communication tools as your own, becoming a one-stop-shop for technology solutions without bringing on additional team members. Schedule a demo and see how our industry-leading platform, quote-to-cash software, and other proprietary automation can make running a unified communications business easy. Fair pricing algorithm that only charges for seats that are used and not multiple times for users with multiple devices. Our proprietary, all-in-one quote-to-cash software and reseller dashboard provides a turnkey tool for sales, quoting, tax automation, marketing, and online learning that supports your branded platform and gives you the edge on capturing and winning more business.

A powerful feature-packed Cloud phone system to help your business thrive. Flexible, scalable and compatible with the devices you already use, Yay.com offers a communication solution that combines a host of of professional features with lightning fast set-up and ease of use. Built from the ground up to support businesses around the world, wherever they're based. Connect teams and collaborate across borders in minutes with a dynamic phone system that lets your teams work the way they want to. Deliver improved caller satisfaction through a range of business features such as CRM integrations, call queuing, IVR call menus and more. Get started with a free trial and discover how our phone system can seamlessly enhance your business and help you reduce your business costs today.

Imagine if your customers could seamlessly communicate with your business how they want to. Calling, SMS, messaging, social, and chat all unified in one interface with one goal: simplifying communication. You’ll want to see what we have in store. With Vonix, you’ll be able to call, text, social message and chat using your business profile from one mobile app. You’ll access all your business phone features as if you were in the office, using your business number from your cell phone. Text or message your customers, and transfer whole conversations with the internal collaboration features. Sync conversations into your customer records and keep everyone in the loop. Access business calling features like interactive voice menus, day/night mode, voicemail transcription & more. Improve satisfaction and get faster resolutions by enabling customers to communicate via their preferred method.

At My Country Mobile, we provide superb, easy-to-use, and low-budget VoIP solutions for small businesses. Enjoy the following with a 30-day risk-free trial based on our premium VoIP phone system. Our mission is to help families and friends stay connected across borders through seamless communication, By leveraging technology and intelligence, we aim to empower both personal and professional connections in a seamless and efficient manner. Our team has gained a wealth of knowledge and expertise, allowing us to deliver high-quality results and exceed our clients’ expectations. We look forward to continuing to grow and expand our portfolio. With over tens of years of experience, My Country Mobile has been a pioneer in developing technologies and services that facilitate easy and affordable communication and sharing for individuals and businesses worldwide.

CallHarbor offers small and medium-sized business phone & UCaaS systems. Our platform give you statistics on your employees, integrates with your existing applications, and allows you to access full functionality even when out of the office. We are so much more than just in and out calling. CallHarbor works with businesses in diverse industries and continually provides industry leading systems to streamline workflow in communication. CallHarbor offers leading mobile and web apps to allow you to work on the go. From making calls on your desktop, to checking your voicemail in your email, we have it all. CallHarbor does not limit the amount of Queues, Auto-Attendants, Parking Lots, or Users your system can have. This makes it easy to start small and grow big. We're with you every step of the way. We have reliable geo-redundant data centers so that you don't have to worry about a dropped call. We offer 25+ world class features with your original plan, and give you one great flat rate.

Our expert team will customize your BroadConnect VoIP service with the hardware and support to bring your office phone system to the highest level. BroadConnect Canada specializes in serving the business community as a whole with a national presence and dedicated lines for all of your IP telephony communication needs with our commercial phone systems for businesses. Unified communications integrated with collaboration applications, such as video conferencing or file-sharing create a dynamic work environment. We promise you crystal-clear call quality, flexibility, and system scalability through our extensive advanced phone features delivered over our reliable and global IP network. We will manage all aspects of your VoIP business phone service, keeping your office phone system up to date with the latest technology upgrades. We provide a state-of-the-art unified communications service with multiple points of access to permitted resources.

Companion or replacement for your desk phone! Already have modern phones? Bring them with you! You can connect any compatible device to your virtual phone system, with no restrictions. Sign up for pricing and features, and stay for service and support! The only cloud business phone service to publish this level of reliability! You have control, add what you need when you need it! Volume discounts and automatic pricing tiers are available! Everything your business needs the inclusive modern phone system! Industry-leading technology + the highest certification possible! We take care of security, updates and upgrades, for free! How you and your customers communicate matters. We'll teach you! Feeling abducted by something new and different? We'll be right here to help! Can your phones and fax pass an audit today? We've done all the work, so you don't have to! Using the world's most advanced speech-to-text technology our service instantly transcribes voicemails and sends them to your email.

We unleash human momentum with collaboration, connectivity, and communications technology. All business is human—and when custom technology empowers human ingenuity, people and companies thrive. High performing teams do more, achieve more, and win more. Companies become agile, efficient, and resilient. Our team takes pride in making technology easy and cost effective. We love what we do—and it shows in the way we partner with you, from our first conversation to ongoing post-install support. Working with over 30,000 customer locations in 65+ countries, we deliver straightforward, secure, and scalable global managed services and advanced collaboration and communications solutions. Together let’s build your human momentum. More at gomomentum.com