Zero vs. SIPSTACK

Engage and collaborate on your own terms with the all-encompassing solution provided by Intermedia Unite. Whether you're working from the office, traveling, relaxing at home, or sipping coffee, the expansive communication and collaboration tools from Intermedia Unite ensure that you can maintain productivity and stay connected with both colleagues and clients effortlessly. You can securely share and work on documents from almost any location, enjoying complete file management with features like real-time backup and recovery. Automated greetings and rapid call routing that align with your operational hours guarantee that customers are swiftly directed to the right team member, ensuring efficient access to your staff. Incoming calls can be directed to specific teams designated for handling them, while also keeping you informed about your coworkers' availability statuses through instant notifications that indicate whether they are Available or Unavailable. With Intermedia Unite, maintaining connections while enhancing productivity has never been easier or more effective, making it an essential tool for any modern workplace.

Yeastar P-Series Phone System is a business communication solution that offers companies of all sizes with a complete package for calls, video, messaging and integrations, out of the box. With inbuilt visual call management, integrated video conferencing, advanced contact center features, and ready-made SMS, WhatsApp, Microsoft Teams, CRMs, and more platform integrations, it boosts user experience at all levels and provides everything across desktop, mobile, and browser with simple user apps.

PBXware stands out as the original and most prominent IP PBX Professional Open Standards Turnkey Telephony Platform available today. Since its inception in 2004, PBXware has been delivering adaptable, dependable, and scalable Next Generation Communication Systems (NGCS) alongside VoIP solutions tailored for small and medium-sized businesses (SMBs), large enterprises, Internet Telephony Service Providers (ITSPs), call centers, and various governmental agencies across the globe. This achievement is realized by integrating the finest elements of cutting-edge technologies. The Bicom Systems softswitch is offered in several editions, including Business, Call Center, and Multi-Tenant, with each edition designed to support specific features that enhance performance, reliability, and expandability, ensuring users get the most out of their systems. This versatility makes PBXware a preferred choice for organizations seeking robust telephony solutions.

Zoom Phone is an AI-powered business communications platform that provides cloud-based Voice over Internet Protocol (VoIP) calling, messaging, and phone system management for organizations. The software replaces or supplements traditional business telephone infrastructure with internet-based calling accessible through desktop applications, mobile devices, and compatible desk phones. Its unified communications environment connects business calling with Zoom Meetings, Zoom Chat, SMS messaging, and online fax capabilities. Call management features include automated receptionists, interactive voice response menus, call forwarding, call transfers, shared line groups, call queues, and configurable routing policies. Administrators can assign phone numbers, configure business hours, manage devices, establish user permissions, and monitor communication activity through a centralized management portal. Zoom Phone provides voicemail transcription, call recording, searchable call histories, and reporting tools for reviewing communication performance. Its built-in AI capabilities generate post-call summaries, identify discussion highlights, extract action items, and prioritize important voicemail messages. ZoomMate provides contextual assistance during conversations and helps users prepare for calls, retrieve relevant information, and automate follow-up activities. Zoom Virtual Agent Receptionist offers optional AI-powered call answering that can respond to customer questions, schedule appointments, communicate in multiple languages, and transfer callers with conversation context. The platform also supports outbound calling workflows through Zoom Auto Dialer and integrates with Zoom Revenue Accelerator for conversation intelligence and sales coaching. Zoom Phone provides integrations with Salesforce, Microsoft, Google, and other enterprise systems, along with developer APIs, call quality dashboards, security controls, and international calling options.

Scattered conversations cost businesses time, money, and customers. When voice, chat, video, and support tickets live in different systems, teams lose context, customers repeat themselves, and problems take longer to solve. net2phone fixes this. For 30+ years, net2phone has built AI-powered communication technology for businesses that treat customer experience as a competitive advantage. Today more than 500,000 users rely on net2phone to turn everyday conversations into retention and growth, backed by expert guidance at every step of implementation and beyond. Unite brings voice, messaging, video, and chat together in one workspace. Calls and video are recorded and transcribed automatically, sentiment analysis flags how conversations are actually going, action items get tracked without manual entry, and AI drafts the follow-up emails, so teams stop switching tabs to get work done. AI Agent takes routine work off your team's plate entirely. It answers customer questions, resolves support cases, books appointments, and processes returns across phone and chat, in more than 30 languages, and hands off to a human the moment a conversation needs one. Coach AI reviews every single voice, video, and text interaction, not a sample, so managers can see exactly how each rep and department are performing, spot coaching opportunities, and act on real call summaries and sentiment data instead of guesswork. uContact powers high-volume sales and support operations with intelligent routing, omnichannel automation, and live dashboards, keeping customer experience consistent no matter how much volume comes in. net2phone integrates with the systems you already run, includes a no-code workflow builder, and is protected by enterprise-grade security throughout, so the technology keeps delivering measurable results long after go-live.

Aircall is redefining call center and customer communication software with an AI-driven platform that empowers teams to work smarter and connect better. Designed for both sales and support teams, it centralizes phone calls, SMS, and WhatsApp messaging, ensuring no customer interaction slips through the cracks. With AI Voice Agents, businesses can handle inbound calls 24/7, qualifying leads and addressing routine queries without missing a beat. The new AI Assist Pro takes conversations further by coaching reps in real time, guiding them with prompts, and automating follow-ups—turning every rep into a top performer. Teams also gain actionable insights with powerful analytics, call recordings, and performance dashboards to identify trends and improve outcomes. Aircall’s shared inbox keeps cross-channel communication organized, while IVR and automated call routing reduce resolution times. Businesses appreciate its fast, intuitive setup: claim numbers instantly, configure workflows in minutes, and connect seamlessly to Salesforce, HubSpot, Zendesk, Intercom, Shopify, Microsoft Teams, and 250+ integrations. Customers around the world—from travel agencies to healthcare recruiters—praise Aircall for its stability, reliability, and ease of use. With proven results like increased bookings, faster onboarding, and measurable boosts in customer satisfaction, Aircall demonstrates real business impact. By combining automation, AI, and human connection, it delivers a future-ready communication hub that helps companies scale without sacrificing quality.

Transform your surroundings into a functional workspace with 800.com, which enables you to oversee your business operations directly from your mobile device. This service comes without the need for a contract, providing advanced calling features and cell phone forwarding capabilities that enhance customer engagement, brand recognition, and response rates through SMS messaging. You can effortlessly manage extensions, send out professional greetings, and oversee your account conveniently online. 800.com supports various types of forwarding, including simultaneous and sequential ringing, ensuring you never miss a call. Utilizing toll-free numbers establishes a credible presence in the U.S. market, while local numbers can suggest a limited business scope. Each member of 800.com enjoys full access to all phone system tools, irrespective of their selected plan, making it easier to serve clients and reduce long-distance charges for both your customers and your business. By choosing 800.com, you position your company for success in a competitive environment.

Transforming communication within your organization, our service integrates your business phone number seamlessly with the devices of your employees. Featuring a host of impressive functionalities, callers can easily navigate through a professional voice-guided dial menu, allowing them to make purchases, access MP3s, or connect with specific team members effortlessly. You can make and receive calls using your number across multiple devices without callers realizing that there are different lines involved. Employees enjoy the advantages of concealed in-house menus, the ability to transfer calls, and the convenience of sending voicemails straight to their email, all via a user-friendly dialpad. Best of all, implementing these innovative business capabilities requires no extra software or hardware, ensuring a straightforward transition. Your dialpad becomes a dynamic resource, making it simple to transfer either your business or personal number with just a single touch. Select from a variety of modern voice features designed specifically for your business or personal line, and we will manage the activation on your existing phone with minimal effort required from you. Our dedication lies in adapting your number to meet your changing requirements whenever you need it, ensuring that your communication remains efficient and effective. This flexible approach not only streamlines operations but also enhances overall productivity within your team.

Ultatel stands out as a prominent leader in the field of business communications. By leveraging advanced cloud VoIP technology, we empower businesses to enhance their productivity and maintain seamless connections with their customers, no matter their location. Our offerings are designed to be fully customizable and scalable, featuring unlimited Calling, SMS, Fax, Chat, Video, and over 40 Advanced Features to meet diverse needs. One of the most appealing aspects of our service is our commitment to Transparency in Pricing; you won’t encounter any hidden fees or unexpected charges, ensuring that what you see is indeed what you pay, unlike some competitors. As a recognized Gartner Category Leader and G2 High Performer, Ultatel is dedicated to delivering a cohesive communications platform that evolves alongside your company's requirements. Our innovative FlexScale technology allows you to adjust your service capacity effortlessly and immediately, without any interruptions or penalties. In addition, our award-winning Customer Support team is available around the clock, every day of the year. With an impressive 94% first-contact resolution rate, you can trust that you’ll receive exceptional assistance whenever you need it. Don't hesitate to reach out to us today to arrange your discovery call or demo, and experience how Ultatel can transform your business communications! Your satisfaction is our priority, and we look forward to partnering with you for success.

3CX is a versatile, software-driven IP PBX built on open standards that delivers comprehensive Unified Communications straight out of the box. It caters to businesses of all sizes and across various sectors, offering a full suite of features that range from mobility and presence indicators to sophisticated call center functionalities, all at a significantly reduced cost. This platform is particularly well-suited for remote work environments, featuring mobile applications, video conferencing capabilities, and live chat integration for websites. Installation, management, and maintenance of the PBX are straightforward, allowing users to easily handle it themselves on their own hardware, a dedicated server, or via a cloud environment. Alternatively, users can opt for 3CX's hosting services to simplify their setup even further. With its user-friendly design and extensive feature set, 3CX empowers companies to enhance their communication strategies effectively.