--- title: VoIP Reviews meta_title: 'VoIP Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter reviews by the users' company size, role or industry to find out how VoIP works for a business like yours. aggregate_rating: rating_value: 4.6 review_count: 5 scale: '5' date_modified: '2025-04-17' parent_category: name: Collaboration & Productivity url: https://www.g2.com/categories/collaboration-productivity --- # VoIP Reviews **Vendor:** Sigma Telecom **Category:** [VoIP Providers](https://www.g2.com/categories/voip-providers) **Average Rating:** 4.6/5.0 **Total Reviews:** 5 ## About VoIP Sigma Telecom was founded in 2003 to provide telecommunication infrastructure services. Today Sigma provides high-quality VOIP and software services to telecommunication operators, suppliers, and vendors worldwide. ## VoIP Reviews ### 1. Great Improvement **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Banking | Small-Business (50 or fewer emp.) **Reviewed Date:** August 17, 2023 **What do you like best about VoIP?** One of the most helpful things about VOIP is it's ease of use and the fact that you can add a list of contacts for those that you contact on a regular basis and then just click their name or # and dial **What do you dislike about VoIP?** The only downside is that it if the internet is sluggish or down, then you have no VOIP, meaning no phone to make calls, unless you have backup hard landline, which most organizations do not. **What problems is VoIP solving and how is that benefiting you?** VOIP solvs many problems. Not only do I use it to dial contacts and prospective clients, I can also send them a sms thru VOIP as well. It has so many more features now than it had just a few years ago. I can setup and look at reports for each user. ### 2. Vol **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Consulting | Mid-Market (51-1000 emp.) **Reviewed Date:** August 15, 2023 **What do you like best about VoIP?** It allows creativity while I have used it. **What do you dislike about VoIP?** It can fail in a moment notice when is very unhelpful. **What problems is VoIP solving and how is that benefiting you?** Talk to customers and help them overall - [View VoIP pricing details and edition comparison](https://www.g2.com/products/sigma-telecom-voip/reviews?filters%5Bnps_score%5D%5B%5D=4§ion=pricing&secure%5Bexpires_at%5D=2026-08-14+00%3A37%3A50+-0500&secure%5Bsession_id%5D=6b2b4419-9900-463e-b8d6-dd64020b1966&secure%5Btoken%5D=898bb1850194821f15d74321c0c4a6f2a383c2abbc61413c0b9944012d31281f&format=llm_user) ## VoIP Features **Additional Functionality** - Third-Party Integrations - To-Do List - @mentions - Single Sign On - File Management - Activity Dashboard - Drag & Drop - Alerts/Notifications - Prioritization - Access Controls/Permissions - Screen Sharing - Content Management - Brainstorming - AI Copilot - File Transfer - Calendar Management - Status Tracking - Real-Time Notifications - Version Control - Task Management - Activity Tracking - Real Time Editing - Communication Management - Chat/Messaging - Tagging - Generative AI - Assignment Management - Task Scheduling - Project Management - Collaboration Tools - Workflow Management - Secure Data Storage - File Sharing - Document Storage - Task Progress Tracking - Discussions/Forums - Commenting/Notes - Reporting & Statistics - Contact Management - Video Conferencing - Progress Tracking - Mobile Access - API - Document Management - Customizable Branding **Platform Basics - VoIP Providers** - PBX systems, VoIP Softphone - Call Management - Network monitoring - Integrations - Virtual PBX - SIP trunking services - Contact Management - Communication Management - Fax Management - Call List Management - Call Center Management - Queue Management - Third-Party Integrations - Computer Telephony Integration - Real-Time Monitoring - Call Monitoring - Workflow Management - Call Center Integration **Basic Communication** - Phone Calls - Video Calls - Instant Messaging - Screen Sharing - Conference Calls - Desk-to-Desk Calls - SMS Messaging - Chat/Messaging - Video Call Recording - Two-Way Audio & Video - SIP Trunking **Agentic AI - VoIP Providers** - Autonomous Task Execution - Cross-system Integration - Adaptive Learning - Proactive Assistance **Access** - Software Pairing - Browser Extension - Individual Download **Advanced Features** - Hold Music - Automated Attendants - VOiP Number **Additional Functionality** - Live Chat - Multi-Channel Communication - Customizable Reports - Call Tracking - Automatic Call Distribution - Real-Time Data - Purchasing & Receiving - Employee Directory - AI Copilot - Activity Tracking - Collaboration Tools - Call Scripting - Real-Time Reporting - Call Recording - Real-Time Analytics - Virtual Call Center - Activity Dashboard - Reporting & Statistics - CRM - Auto-Dialer - Generative AI - Contact Database - Call Transfer - Call Reporting - Call Logging - Voice Mail - Caller ID - Customizable Caller ID - Mobile Access - Callback Scheduling - IVR - API - Interaction Tracking - Call Routing - Alerts/Notifications - Video Conferencing - Call Conferencing - Call Disposition - Predictive Dialer - Spam Blocker - On-Demand Recording - Caller Profiles - Multiple User Accounts - VoIP Connection - Conferencing - Text to Speech - Reporting/Analytics - VoIP - Call Queues - Call Screening - Access Controls/Permissions - Online Voice Transmission - Unified Communications - Voicemail Transcription ## Top VoIP Alternatives - [KrispCall](https://www.g2.com/products/krispcall/reviews) - 4.5/5.0 (366 reviews) - [Webex Suite](https://www.g2.com/products/cisco-webex-suite/reviews) - 4.2/5.0 (17,667 reviews) - [Dialpad Connect](https://www.g2.com/products/dialpad-connect/reviews) - 4.4/5.0 (4,037 reviews)