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Top Rated VoIP Software with Slack

Last updated: August 2026

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36 software options

Ringover logo

100% cloud phone for startups and SMEs

Ringover allows you to make unlimited VoIP calls to over 110 destinations worldwide - no matter your plan - offering you precise, transparent rates for all other global destinations.

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CallTools logo

All-in-one predictive dialer & inbound call center solution

CallTools is an all-in-one call center solution offering an outbound power dialer & inbound call center with live agent monitoring, skill-based routing, & more. Unlimited Minutes on Predictive, Power, and Preview Dialer with Built-In Web Phone, CRM, and Dedicated In-House Support Team. Call us now!

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Gladly logo

Cloud-based customer service platform

Gladly is the only CX AI that delivers cost savings AND customer devotion—built to engage, not deflect. Learn more at gladly.ai

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Intermedia Unite logo

All-in-one communications & collaboration tool

Award-winning VoIP business phone system that helps small businesses lower costs and increase employee productivity. With complementary mobile and desktop apps Unite users stay seamlessly connected. Unite is backed by J.D. Power-certified 24/7 support and a 99.99% uptime service level agreement.

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Spoke Phone logo

Great customer conversations anywhere, on any device.

Spoke Phone is the leading platform for high-value, complex, and regulated conversations. Spoke guides employees to say and collect the right things so deals move forward and customers get better experiences. Compliant calls, SMS, and WhatsApp conversations on mobile phones and desktops devices.

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VirtualPBX logo

One simple plan. Everything included.

VirtualPBX is radically simple: one plan, no contracts, at just $15/user/mo, plus real U.S.-based expert support—not a runaround.

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FreeConferenceCall.com logo

Web conferencing and team collaboration solution

FreeConferenceCall.com is a conference management solution designed to help businesses organize, launch & manage meetings with external and internal stakeholders. The audio conferencing functionality lets users connect with participants using VoIP or domestic/local dial-in numbers.

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uContact logo

Beautiful Contact Center Solution - Omnichannel - All in One

uContact is a beautiful contact center solution designed to make the life of the agents easier and more productive. Ideal for inbound, outbound & blended call centers.

Key features:
- True All in One
- Omnichannel: Email, SMS, Web Chat, Facebook, Twitter.
- IVR
- Gamification
- Recording
- WFM

Read more about uContact

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NUACOM logo

All-in-one Cloud Phone System for SMBs

NUACOM offers an all-in-one Cloud phone system for SMBs that need a modern, fully scalable business communication solution. The platform offers over 50 business-class features to help boost productivity, connect departments, and centralize telephony for all locations.

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Vodia PBX logo

Cloud-based IP PBX for business communications

Vodia IP-PBX is a cloud-based business phone system that enables professional communication from office or remote locations. The platform supports mobile and desktop applications, VoIP phones, and features unified caller identification across devices. It includes Microsoft Teams integration, CRM connectivity with platforms like HubSpot and Salesforce, and multimedia messaging capabilities. The system offers multi-tenant architecture with a built-in session border controller and load balancer.

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Yay logo

Powerful business cloud phone system for easy collaboration

Yay is a cloud-based phone system that combines business messaging, HD VoIP, and a host of call features. It offers instant setup and friendly support.

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net2phone Canada logo

Cloud-based VoIP communications platform for business users

net2phone Canada is a SaaS-based communications provider offering VoIP and analytics solutions to Canadian businesses, with scalable telephony packages providing call queues, unlimited international calling to 40+ countries, free Polycom phones, & features including data insights & app integrations.

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Placetel logo

All-in-one - cloud calling, team messaging & online meetings

Placetel + Webex combines business telephony software from the cloud with the full Webex suite. Benefit from over 150 telephone system features paired with video conferences in HD, file and screen sharing, call control, instant messaging, call center functions and unified communication.

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CircleLoop logo

Cloud based business telephony system

CircleLoop is a cloud-based,self-serviced business telephony software system with native desktop, and mobile apps, boasting features including UK and international number support, personalized voicemail, call transfer, call recording, SMS integration, smart notifications, contact management and more

Read more about CircleLoop

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GoCo logo

Cloud-based business phone system for businesses

GoCo is a cloud-based business phone system that enables hybrid work with call routing features across devices such as desktop, mobile, and tablet.

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Avaya Spaces logo

Video conferencing & meeting platform for team collaboration

Avaya Spaces is a unified communications platform that provides non-profit organizations, educational institutions, and corporate businesses with tools to facilitate collaboration across remote teams. Key features include alerts/notifications, messaging, task management, progress tracking, and more.

Read more about Avaya Spaces

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Ring4 logo

Second phone number app for texting and calling

Ring4 provides companies and individuals with a lightweight voip cloud solution to manage phone lines as simply as they manage emails. The Ring4 smart numbers work on any iOS or Android device and can be managed via the Admin Console.
Ring4 starts at $9.99/month/line.

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Users also considered
CloudTalk logo

Cloud-based call center software for sales and support teams

CloudTalk is a VoIP phone system built for modern companies. Make things easier for your sales and customer support teams with 70+ advanced features and easy-to-setup integrations with your existing business software. It’s the perfect phone system for mid-sized companies. Try a FREE 14-day trial.

Read more about CloudTalk

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8x8 Contact Center logo

One solution for every customer interaction.

8x8 Contact Center is a complete, reliable and secure solution that helps businesses boost engagement, collaboration, and operational effectiveness for customer success.

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CxEngage logo

Video, audio & web conferencing platform

Lifesize is an audio, web & video conferencing tool which supports chat functionality, an integrated search-based directory, plus video call recording & sharing

Read more about CxEngage

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Dialpad AI Meetings logo

AI-native meetings that turn conversation into action.

Dialpad is an AI-native VoIP platform where Agentic AI reasons through every conversation in real time, connecting voice and video that used to sit in silos, including meetings in Dialpad AI Meetings. Intelligence compounds over time, governed by Dialpad's Guardian layer.

Read more about Dialpad AI Meetings

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GoTo Connect logo

The first-ever truly unified voice and video solution.

GoToConnect combines the power and reliability of Jive's cloud VoIP phone systems with GoToMeeting's web, audio and video conferencing into one simple, reliable and flexible solution. Users can meet, talk, chat, text and collaborate seamlessly via web browser, desktop application, or desk phone.

Read more about GoTo Connect

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Yodel logo

Business phone system for streamlining customer service

Yodel is a cloud-based business phone system designed to help teams manage inbound and outbound calls via Slack using existing phone numbers. It lets customer service representatives view which members are on active calls, and join conference calls to facilitate communication across organizations.

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Sprinklr logo

The definitive AI-native platform for customer experience

Sprinklr is the definitive, AI-native platform for Unified Customer Experience Management (Unified-CXM), empowering brands to deliver extraordinary experiences at scale, across every customer touchpoint.

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GoTo Meeting logo

Online meeting software with HD video conferencing

Get a fast, easy and reliable professional solution that enables customers to connect with colleagues through in-meeting chat or conference calling, and screenshare their presentations, all with the click of a button. The Meeting solution from GoTo Connect pairs productivity with flexibility.

Read more about GoTo Meeting

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