Best Slingshot VoIP Alternatives & Competitors in 2025

RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies.

Key RingCentral features:

Comprehensive Features Scalability Easy Integration Reliable Uptime

Open Source freemium $19.99 / Monthly (All-in-One Phone, Team Messaging, and Video Conferencing.)

Virtual phone system that lets you run your business from anywhere.

Key MightyCall features:

Ease of Use Affordability Call Quality Scalability

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Key VoIPstudio features:

Call Recording Call Forward Call Analytics and Reporting Call Conferencing

Try for free paid Free Trial $4.99 / Monthly (User)

Line2 adds a second phone number or complete cloud business phone system to smartphones & computers that's robust yet affordable. Buy online or get a custom quote.

Key Line2 features:

Multiple Numbers on One Device Cross-Platform Compatibility Affordable Pricing Advanced Call Features

The Cloud Phone System of choice for modern sales and support teams. We help end clueless conversations by adding context to every call.

Key JustCall features:

Ease of Use Integration Capabilities Global Calling Automation Features

paid $30.0 / Monthly

Google Voice gives you one number for all your phones, voicemail organized in an email format, free...

Key Google Voice features:

Cost-effective Integrations Unified Number Voicemail Transcription

Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.

Key Skype features:

Cross-platform availability Integration with Microsoft services Free video and voice calls Screen sharing

Call Me Private masks your phone number behind a virtual number, for privacy, or for a professional...

Key Call Me Private features:

Anonymity Ease of Use Affordability Flexibility

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Key VoIPstudio features:

Call Recording Call Forward Call Analytics and Reporting Call Conferencing

Try for free paid Free Trial $4.99 / Monthly (User)

YouMail turns visual voicemail into a personal assistant for handling all your missed calls.

Key YouMail features:

Call Blocking Visual Voicemail Automatic Spam Identification Custom Greetings

Read, play and manage voicemail and missed calls on your smartphone, PC, tablet & email.

Key HulloMail features:

Ease of Use Visual Voicemail Voicemail Transcription Cloud Storage

Switch is a cloud-based phone system built for Google Apps users.

Key Dialpad features:

Unified Communications AI-Powered Features Mobile and Desktop Compatibility Integration Capabilities

Use your iPhone, iPad or iPod touch to make and receive calls using your 8x8 Virtual Office phone...

Key 8x8 Virtual Office features:

Integration Capabilities High Call Quality Global Reach Comprehensive Feature Set

Wireless business phone system built for sales and support team.

Key Truly Wireless features:

Portability Ease of Installation Aesthetics Freedom of Placement