Best Business VoIP Providers for Slack

Intermedia Unite is an all-in-one business communications and collaboration platform designed to keep employees connected and responsive across locations, devices, and teams. The solution combines cloud phone service, video meetings, team messaging, file sharing, customer engagement tools, and productivity features into one integrated platform. By consolidating multiple communication tools, Unite reduces app switching and gives employees a simpler way to call, meet, chat, share files, and engage customers from desktop or mobile devices. Its enterprise-grade calling system includes more than 100 voice features that support professional business communications and consistent customer interactions. The platform also supports enhanced Microsoft Teams experiences, helping organizations extend communication capabilities within their existing collaboration environment. AI features such as transcription, summaries, and conversation insights help users retain important information, identify follow-up actions, and improve team efficiency. Mobile and desktop apps allow employees to maintain a consistent business identity whether they are in the office, remote, or on the go. Backed by strong uptime commitments and J.D. Power-certified support, Intermedia Unite is built for reliability and ease of use. By unifying communications, collaboration, and engagement, Unite helps organizations increase productivity while improving the way teams serve customers.

Aircall transforms conventional VoIP systems and outdated telephone hardware into a cutting-edge phone solution that operates entirely in the cloud. This ensures dependable calling capabilities supported by a worldwide cloud voice infrastructure, eliminating the need for desk phones or physical servers. In addition to standard VoIP services, users benefit from Business Text Messaging (SMS and MMS), mobile phone applications, and a centralized Shared Inbox that organizes calls and messages within a single collaborative environment, rather than leaving them dispersed across different devices. The platform features integrated AI Assistants that offer instantaneous coaching and automated call summaries, while AI Agents manage routine customer inquiries around the clock. With seamless integration to over 250 CRMs and help desk platforms, every communication—be it a call or a text—automatically includes relevant customer context. For organizations that have outgrown basic VoIP solutions, Aircall serves as the preferred customer communication platform chosen by more than 24,000 businesses.

net2phone is an AI-powered business communication platform for companies serious about customer experience. Trusted by 500,000+ users and backed by 30+ years of experience, net2phone eliminates the friction of scattered channels and disconnected tools, so every conversation drives retention and growth. Communication breaks down when channels are scattered and tools do not talk to each other. net2phone solves this with a connected business VoIP and unified communications platform built for teams that cannot afford dropped context or slow resolutions. Unite, net2phone's unified communications solution, brings voice, messaging, video, and chat into a single place, with call and video recording, transcription, sentiment analysis on voice calls, automated action item tracking, and AI-generated follow-up emails. AI Agent handles inquiries and completes workflows on its own, answering questions, resolving support cases, scheduling, and managing returns across phone and chat, in 30+ languages, with seamless handoff to human agents when needed. Coach AI analyzes 100% of voice, video, and text interactions, giving managers full visibility into team performance with sentiment analysis, call summaries, and coaching recommendations by user or department. uContact, net2phone's omnichannel contact center, gives high-volume sales and support teams the automation, AI-driven routing, and real-time dashboards they need to deliver consistent customer experiences at scale. Every net2phone solution connects to the tools businesses already use, with a drag-and-drop workflow builder for automating processes without writing code, backed by enterprise-grade security and expert guidance at every step, from setup to integration to ongoing optimization.

Turn the world into your office. 800.com allows you to manage your business from your cell phone. No contract, advanced calling features, forwarding for cell phones, and advanced calling features Increase conversions, brand recall, higher call response, and SMS messaging. Manage extensions, send professional greetings and manage your account online. 800.com offers standard forwarding as well as simultaneous and sequential ringing. Toll free numbers are the best standard for telephone numbers and will be taken seriously by US customers. Local numbers signal that your company isn't focused on doing business in the entire country. Every 800.com member has access to every phone system tool, regardless of the plan they choose. You will not only help your customers avoid long distance fees but also your company.

Transform your contact center operations with CallTools—an innovative cloud-based platform that unifies inbound and outbound dialing for maximum efficiency. Enhance agent productivity and foster stronger customer relationships with robust features like predictive dialing, call recording, and integrated multi-channel campaigns for email and SMS. Gain a holistic understanding of team performance through comprehensive analytics and real-time reporting tools. With flexible integrations, streamlined queue management, and customizable IVR options, CallTools simplifies workflows and delivers superior call outcomes. Optimize your connection rates using advanced data targeting and dynamic caller ID tools. Designed with an intuitive interface, CallTools empowers teams to handle even complex tasks with ease.

Kixie: Smarter Calling & Texting for Revenue Teams Kixie is the AI-powered sales engagement platform that helps teams connect faster, close more deals, and scale effortlessly—all while keeping it personal. 🔥 Outbound Sales: Boost connection rates up to 400% with AI-powered Local Presence, Multi-Line PowerDialer, and Spam Risk Prevention. 🚀 Marketing: Automate calls & texts for instant follow-ups and high-converting outreach—without the manual work. 📞 Inbound Sales & CS: Handle more calls with smart CRM-based routing, shared SMS inboxes, and instant auto-replies. 📊 RevOps & Leadership: Get AI-driven insights, real-time coaching tools, and advanced analytics to level up your team. 💥 Supercharge your sales team today! Visit our website to get started for free, no credit card required.

KrispCall allows you to manage all your telephony needs, whether they are personal, business, or corporate, using one app (Web, Android and iOS). You can access international numbers from the comfort of your own home. KrispCall makes it easy to create international numbers for national, local, shortcode and toll-free numbers (for more than 100 countries) in no matter how fast you want. You can easily manage your call logs. KrispCall's unified phonebox allows you to manage and monitor all your business calls, voicemails, and recorded conversations from one place. Call your international clients through their local numbers to earn their trust. KrispCall offers international numbers for your business at an affordable price. Our embeddable widget makes it easy to reach your customers. Clients can now easily call you by clicking on the KrispCall widget embedded in their website.

The cloud phone solution is natively designed for the Zoom platform. Modern user interface and enterprise-class features to simplify voice communications. Zoom administrator portal allows you to manage and provision users, as well as monitor call quality and usage. Globally distributed Zoom cloud platform provides secure HD Voice with enterprise-class reliability. You can easily make and receive calls, share content and participate in video meetings. You can also send chat messages using Zoom desktop or mobile apps. You can easily elevate phone calls to Zoom Meetings without having to ask participants to hang up or dial in to a separate conference bridge. Native apps for Windows, MacOS and Android are easy to use and maximize voice and video quality. There is an ever-growing number of countries that provide local phone numbers. Customers who want to simplify global telephony carrier management can port numbers to Zoom.

Dialpad Connect is a comprehensive AI-driven communication platform that unites voice, video, and messaging channels to improve both internal teamwork and customer engagement. The platform provides smart features such as live call transcription, voicemail transcription, AI-powered call recaps, and recommended next steps, allowing users to be fully present in conversations without missing key details. It offers deep integration with leading business applications including Salesforce, Microsoft Teams, Zendesk, and Google Workspace, creating a seamless experience across tools. Built on a resilient dual-cloud architecture, Dialpad ensures enterprise-level performance with 24/7 support, disaster recovery, and a 100% uptime service level agreement. Privacy and security are foundational, with certifications like GDPR, HIPAA, ISO, and SOC 2 safeguarding user data. Dialpad Connect supports a broad range of business sizes, from small teams to large enterprises, enabling better communication and faster decision-making. Its AI capabilities also include live coaching for agents during calls and detailed analytics to improve customer satisfaction. This platform empowers businesses to transform every conversation into a valuable opportunity.

Smart VoIP Solution for Teams of Any Size Zadarma replaces traditional phone systems with a cloud-based platform that’s easy to configure and use. Whether you’re a freelancer, small business, or global enterprise — Zadarma scales with your needs. What you get: - Local, mobile, and toll-free numbers worldwide - Virtual PBX with call queues, voice menus, call recording - AI Voice Agent and AI-speech recognition and analytics - Connect multiple offices and remote employees - Affordable call rates and flexible pricing plans - Real-time call statistics and recording storage - Support for IP phones, softphones, and browsers No hardware needed — just connect your team and start calling.

RingCentral RingEX, a powerful cloud-based telephone system, helps optimize your business communication. RingCentral RingEX provides enterprise-grade communication tools, including voice, fax and text, as well as BYOD (bring your own device) capability. This allows you to work wherever and however you choose. RingCentral RingEX's core features include auto-recording and conferencing as well as unlimited long-distance calling and local calls. RingCentral RingEX can be customized to suit your needs by configuring call management features such as call forwarding, message alerts and missed-call notifications.

The phone system for customer service departments. Yodel is a receptionist who pre-qualifies inbound voice communications. It also allows call management without switching to other tools. Our battle-tested infrastructure allows you to collaborate on calls and enjoy crystal clear voice quality. Your phone system will be up and running in just minutes. No need to transfer your business phone number. Yodel integrates seamlessly with over 1000 software tools, so you can connect your phone to your existing workflows. Yodel gives you access to over 100 countries' phone numbers so you can stay in touch with your customers wherever they may be. Yodel only works with reliable local carriers to ensure the highest quality call quality. We provide reliable service uptime and a secure phone infrastructure. Modern customer service teams must provide high quality customer support and ensure customer satisfaction. Yodel takes out the pain from phone systems and delivers what's important: voice communication.

CallHippo is a modern Contact Center Tool that allows you to connect with customers. CallHippo is simple to use and offers robust functionality with extensive reporting and seamless integrations that enable sales and service teams have productive conversations with customers. CallHippo is trusted worldwide by more than 5000 companies.

My Country Mobile offers low-cost, easy-to use VoIP solutions that are excellent. Enjoy the following features with a 30-day, risk-free trial of our premium VoIP phone system. Our mission is to enable families and friends to stay connected across borders by leveraging technology and intelligence. We aim to empower personal and professional connections with ease and efficiency. Our team has a wealth knowledge and expertise that allows us to deliver high quality results and exceed clients' expectations. We look forward to expanding our portfolio and growing. My Country Mobile, with its tens of year's experience in developing technologies and solutions that facilitate communication and sharing for businesses and individuals worldwide, has been a leader in the development of these technologies and services.

NUACOM is a Software-as-a-Service and Telecom company that provides flexible and scalable calling solutions for businesses to deliver exceptional customer service and handle successful sales calls.. Sales and customer service are important departments for any organization and having a powerful communication platform is crucial for business success. Our calling platform is focused on the user experience, call analytics and automation, so you can focus on what matters most: close more deals and delight your customers.

Quo transforms business communications by merging phone calls, texts, and customer data into a shared, AI-driven environment. Its standout feature, Sona, acts as a virtual answering agent available 24/7 to engage callers, provide business-specific answers, and transfer conversations as needed. The platform gives businesses full oversight with unified conversation threads that consolidate every interaction across channels. Built-in CRM capabilities allow teams to manage contacts, add notes, and maintain context throughout the customer journey. Quo AI further boosts productivity with features like real-time transcription, call summaries, actionable recommendations, and AI-driven tags that automatically categorize interactions. Collaboration tools such as shared numbers, group calling, and warm transfers ensure smooth teamwork, while analytics provide managers with insight into performance trends. Customizable workflows, including scheduled messages, auto-replies, and full call flow control, give businesses flexibility to tailor communication. Backed by thousands of positive G2 reviews and trusted by over 60,000 companies, Quo is a proven solution for growing businesses that want faster, smarter, and more connected customer support.

Built for both large organisations and growing businesses, the Yay.com business phone system offers a versatile and dynamic communication solution that both reduces costs and increases business flexibility. With softphone apps that work with the devices you already use, remote and hybrid working is seamless. Collaborate and connect from any location around the world and work the way you want to. Yay provides a platform for distributed workforces in the office, at home or on the go. Benefit from a host of business features including CRM integrations, IVR call menus, call queueing and more. Get started with a free trial and see how we can help your business thrive today.

Toky is a fully-featured Business Phone System that allows customers and employees to communicate easily. All you need is an internet connection. Virtual phone numbers allow you to be available from anywhere in the world. Integrate your CRM with your business tools seamlessly so you can call customers with one click and automatically log all details. With proven reliability and affordable rates, you can take advantage of features like call recordings, voicemails SMS, Speech to Text, and voicemails.

Voxloud stands out as Italy's pioneering cloud-based phone system that seamlessly incorporates AI to enhance productivity and save valuable time. You can retain your existing landline number when transitioning to Voxloud at no additional cost to you. With a simple activation process, you can set up your new landline number and phone system in just 59 seconds, allowing you to start communicating professionally from the very first day. Say farewell to traditional phone systems and embrace a smarter way of working with Voxloud's innovative cloud phone solution. This single telephone system encompasses all your communication needs, specially tailored for small and medium-sized businesses. Enhance the efficiency of your incoming calls by utilizing an interactive voice response (IVR) system that can be configured with multiple levels. Work flexibly from anywhere and at any time on your laptop, tablet, or smartphone through our user-friendly apps and VoIP devices. Easily add users from various locations and adjust your phone system’s settings with just a few clicks, ensuring that it meets your evolving business requirements. Furthermore, enrich your phone conversations with the most renowned CRM integrations available in the market, providing a comprehensive solution for your communication needs. As a result, Voxloud enables your team to collaborate effectively, no matter where they are.

Dialbird is a cutting-edge phone system for businesses that utilizes AI and VoIP technology to streamline communication for contemporary teams. As companies expand, their phone systems often struggle to keep up, leading to calls being scattered across personal devices, messages trapped in different applications, and reliance on memory for follow-ups. This disorganization can result in slower response times, missed chances, inadequate customer service, and ultimately, revenue loss. By employing Dialbird, teams can effectively enhance their response times, maintain alignment, automate their communication processes, and efficiently oversee follow-ups. Over 500 small and medium-sized enterprises, including various sales and support teams, clinics, and service-oriented businesses, have adopted this system for its structured approach that surpasses the capabilities of lighter phone applications without incurring the high costs or complications associated with traditional phone systems. The platform not only simplifies communication but also fosters a collaborative environment that can adapt to the changing needs of growing businesses.

Crafting Customer Journeys Through Meaningful Conversations. Delivering compelling experiences that align with your customers' needs. Favored by developers and designed for enterprises. Vonage Communications APIs (previously known as Nexmo) empowers emerging startups and nimble organizations to elevate customer interactions and achieve significant business results at scale. With our user-friendly APIs, comprehensive global platform, and dedicated support, you can simplify communication complexities and drive innovation at a quicker pace. Rethink voice communication to transform how your customers engage with your brand. Each message can become a pivotal moment for both your customers and your organization. Advance security and privacy measures while providing smooth login experiences. Develop contemporary, high-quality voice applications hosted in the cloud. Effortlessly send and receive SMS messages in nearly every nation worldwide. Access real-time insights on any phone number across the globe. Initiate and receive calls using your current VoIP system, all from the cloud, ensuring flexibility and efficiency. This holistic approach not only enhances user engagement but also fosters long-term relationships with your audience.