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Top Rated Telephony Software with Open source - Page 10

Last updated: October 2026

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332 software options

Quo logo

The collaborative phone system trusted by 90k+ teams

Quo is the collaborative phone system trusted by teams at over 90,000 businesses.

Quo modernizes business telephony with a cloud-based phone system built for teams. Get shared numbers, intelligent call routing, recording, and AI-generated call notes, all on one simple platform.

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Zadarma logo

Business phone system for companies of all sizes

A new generation of VoIP for your business, offering virtual phone numbers, cloud PBX and much more. Save up to 90% on phone bills!

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Pascom Cloud logo

We upgrade business communications

Upgrade your business communications with the pascom cloud phone system.

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eVoice logo

Small business phone software

eVoice is a virtual phone system and PBX tool for small and medium sized businesses. eVoice provides users with new phone numbers, or it takes your existing phone numbers, adds the ability to use a range of features such as auto-receptionist, recorded greetings, voicemails, conferencing and more.

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NiCE CXone logo

Cloud-based contact center software

For organizations around the globe, NICE provides customer experience (CX) solutions that increase customer satisfaction, boost operational efficiency, and strengthen brand value.

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Five9 logo

Cloud contact and call center software

Five9 is an all-in-one cloud contact center solution for inbound, outbound, blended and omnichannel contact centers world-wide. Powered by Practical AI, Five9 enables agents to provide customer experiences across phone, email, chat, mobile, social and more

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RingEX logo

RingEX - AI meets trusted communications

Designed to give you a flexible, mobile, and powerful cloud phone system. Experience HD-quality web, audio, and video, along with one-click functionality and webinar capabilities with RingCentral Video. Promote collaboration with team messaging, unlimited SMS, and more.

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MyOperator logo

Cloud communication platform for calls, WhatsApp & AI

MyOperator is a cloud-based business communication platform unifying calls, WhatsApp, and AI-powered bots for SMBs and enterprises.

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Bitrix24 logo

Cloud & on-premises workspace for all business sizes

Bitrix24 #1 business phone system and CRM in one. Inbound and outbound calls, IVR, telemarketing, robocalling, voice mail, call recording, call routing, domestic and international phone number rental. Used by over 12 million businesses worldwide!

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MiVoice Business logo

AI-powered communications solutions for all industries

MiVoice Business delivers a full communications solution with business phone features, chat and video messaging, audio and video conferencing, collaboration, and AI-integrated contact center capabilities that enables faster and more effective communications.

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Grasshopper logo

Turn the World Into Your Office

Turn the world into your office with Grasshopper, the entrepreneur’s phone system. With a toll free or local number and features like unlimited extensions, professional greetings, voicemail via email and a dial by name directory. Prices as low as $14/month.

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Sideline logo

Your Phone’s Other Number.

A second-phone number without a second phone that works better than VoIP or cloud based options.

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Playbooks logo

Sell More with an AI System of Growth

The Playbooks sales acceleration platform delivers:
• Visibility: Know what your sales reps are doing and what is working.
• Productivity: Increase key metrics with easy-to-use tools and motivation.
• Effectiveness: Sell more by focusing reps on deals most likely to close.

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Aircall logo

Cloud-based phone & AI comms for SMB & mid-market

Make every phone conversation count and give time back to your reps with 100+ CRM, Helpdesk, and software integrations.

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8x8 Work logo

Integrated contact center, voice, chat, video, and APIs

8x8 Work: Your all-in-one collaboration hub - phone, video, messaging. Secure unified communication for every employee, anywhere, any device.

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MightyCall logo

MightyCall's Call Center solution for your business.

MightyCall’s telephony capabilities makes business communications more reliably than ever. With dozens of features, you can know that every aspect of your company’s communications is covered smoothly.

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Vonage Business Communications logo

Cloud-based business VoIP phone service

Vonage Business provides a cloud-hosted business VoIP phone system, with customizable feature sets for the differing needs of small and medium businesses

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Mango Voice logo

Making Communication Simple

Mango is a simple yet powerful VoIP, cloud based, phone system software. Combine that with a mobile app, world class software integrations, competitive pricing, good old fashioned U.S. based customer service, and you've got the best VoIP phone software solution your office could have.

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JustCall logo

Cloud-based AI communication platform for sales teams

Never miss a lead or customer call with JustCall's AI-powered communication platform. Voice, SMS, email & WhatsApp in one place.

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CDC Telephony Software logo
(0)

Read more about CDC Telephony Software

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everreach logo
(0)

Read more about everreach

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KI Telefonassistent logo
(0)

Read more about KI Telefonassistent

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5G Software logo
(0)

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GoContact logo
(0)

Contact Center as a Service (CCaaS) platform

GoContact is a native Contact Center as a Service (CCaaS) platform developed 100% in the cloud, with integrated omnichannel and artificial intelligence solutions. GoContact offers a robust set of features designed to streamline contact center operations and enhance customer service delivery.

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Speak2Leads logo
(0)

Automated Lead Calling Software

Speak2Leads automatically puts your reps on calls with leads in less than 60 seconds – meaning more sales, reduced costs and a killer competitive edge. 78% of leads buy from the first company they speak to. But most sales teams don’t follow-up quickly enough – and it costs your business big time.

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