Compare AT&T Office@Hand vs. OnSIP

Intermedia Unite is an all-in-one business communications and collaboration platform designed to keep employees connected and responsive across locations, devices, and teams. The solution combines cloud phone service, video meetings, team messaging, file sharing, customer engagement tools, and productivity features into one integrated platform. By consolidating multiple communication tools, Unite reduces app switching and gives employees a simpler way to call, meet, chat, share files, and engage customers from desktop or mobile devices. Its enterprise-grade calling system includes more than 100 voice features that support professional business communications and consistent customer interactions. The platform also supports enhanced Microsoft Teams experiences, helping organizations extend communication capabilities within their existing collaboration environment. AI features such as transcription, summaries, and conversation insights help users retain important information, identify follow-up actions, and improve team efficiency. Mobile and desktop apps allow employees to maintain a consistent business identity whether they are in the office, remote, or on the go. Backed by strong uptime commitments and J.D. Power-certified support, Intermedia Unite is built for reliability and ease of use. By unifying communications, collaboration, and engagement, Unite helps organizations increase productivity while improving the way teams serve customers.

net2phone is an AI-powered business communication platform for companies serious about customer experience. Trusted by 500,000+ users and backed by 30+ years of experience, net2phone eliminates the friction of scattered channels and disconnected tools, so every conversation drives retention and growth. Communication breaks down when channels are scattered and tools do not talk to each other. net2phone solves this with a connected business VoIP and unified communications platform built for teams that cannot afford dropped context or slow resolutions. Unite, net2phone's unified communications solution, brings voice, messaging, video, and chat into a single place, with call and video recording, transcription, sentiment analysis on voice calls, automated action item tracking, and AI-generated follow-up emails. AI Agent handles inquiries and completes workflows on its own, answering questions, resolving support cases, scheduling, and managing returns across phone and chat, in 30+ languages, with seamless handoff to human agents when needed. Coach AI analyzes 100% of voice, video, and text interactions, giving managers full visibility into team performance with sentiment analysis, call summaries, and coaching recommendations by user or department. uContact, net2phone's omnichannel contact center, gives high-volume sales and support teams the automation, AI-driven routing, and real-time dashboards they need to deliver consistent customer experiences at scale. Every net2phone solution connects to the tools businesses already use, with a drag-and-drop workflow builder for automating processes without writing code, backed by enterprise-grade security and expert guidance at every step, from setup to integration to ongoing optimization.

Signalmash is a specialized CPaaS platform designed for companies that value dependable messaging infrastructure paired with hands-on, human support. No complicated pricing tiers. No long support queues. Just direct access to real experts to help you build faster and deliver better customer experiences. Enterprise clients work directly with our engineering team via a dedicated Slack channel. We offer direct Tier-1 carrier connectivity with AT&T, Verizon, and T-Mobile, along with a 94% first-pass approval rate for 10DLC campaigns. Messaging SMS: 10DLC, short codes, toll-free RCS: Rich messaging and media via API or no-code tools Voice SIP trunking, VoIP, inbound and outbound calling Numbers & Identity Local, short code, and toll-free numbers Branded Caller ID (BCID) Number Intelligence CNAM lookups, carrier details, line type (wireless vs. landline), and federal DNC checks Signalmash combines enterprise-level performance with a high-touch, partner-first support model.

3CX is an open-standards, software-based IP PBX that provides complete Unified Communications right out of the box. 3CX is suitable for all industries and sizes. It can provide everything you need, from mobility and status to advanced call center features and more, at a fraction the cost. 3CX is ideal for remote companies and includes mobile apps, video conference, and website live chat. The installation, management, and maintenance of the PBX are so simple that you can easily manage it yourself, on your own appliance, server, or on a cloud-based platform. You can also choose to have it hosted on 3CX for an easy solution.

Google Workspace is an all-in-one cloud productivity platform developed by Google to help businesses manage communication, collaboration, document creation, and workflow automation from a centralized environment. The platform combines professional email, cloud storage, video conferencing, document editing, team messaging, scheduling, and AI-powered assistance into one subscription-based ecosystem optimized for modern work environments. Google Workspace includes applications such as Gmail, Google Drive, Google Meet, Docs, Sheets, Slides, Calendar, Chat, Keep, Forms, Sites, NotebookLM, and Gemini AI, enabling teams to work together seamlessly across devices and locations. One of the platform’s core strengths is its built-in AI functionality powered by Gemini, which helps users draft emails, summarize meetings, generate research insights, automate repetitive tasks, and improve productivity using contextual awareness from workplace data. Google Workspace also supports advanced collaboration features including real-time editing, appointment scheduling, eSignatures, document sharing, cloud storage management, and AI-assisted research tools. Businesses benefit from enterprise-grade security features such as AI-powered threat protection, data classification, endpoint management, Data Loss Prevention, secure access controls, and compliance support for enterprise environments. The platform offers scalable pricing plans suitable for startups, small businesses, enterprises, educational institutions, nonprofits, and government organizations. Google Workspace also simplifies data migration and onboarding with built-in migration tools and partner support for transferring emails, files, and business information securely into the cloud.

Ultatel is a recognized industry leader in business communications. With the power of cloud VoIP technology, we help businesses to be more productive and connect with their customers wherever they are. Our plans come fully customizable and scalable with unlimited Calling, SMS, Fax, Chat, Video & 40+ Advanced Features. The best part is, there are no hidden fees or charges! Thanks to our Transparent Pricing model, what you see is what you pay (unlike some other vendors). A Gartner Category Leader and G2 High Performer, Ultatel aims to provide a unified communications platform that adapts to your companies' needs. Powered by our FlexScale technology, you can scale up or down seamlessly and instantly with no downtime or penalty. Furthermore, our Award-Winning Customer Support department is there for you 24/7/365. With a 94% first-contact resolution, you'll have the peace of mind of being connected beyond limits. Contact us today and schedule your discovery call or demo.

Focusing on delivering "Easy-first Unified Communications", Yeastar P-Series Phone System offers companies of all sizes with a complete package for calls, video, messaging, and integrations, out of the box. Available in the Appliance, Software, and Cloud Editions, P-Series provides flexible deployment options, allowing you to have it sited on-premises or in the cloud. Balancing costs and future growth, it requires a lower total cost of ownership, less training, and fewer management efforts. The ease of use and future-proof adaptability are paramount.

Aircall transforms business communications with an intelligent, cloud-based phone system built for modern sales and customer support. More than just a calling tool, it provides an all-in-one hub that connects phone, SMS, and WhatsApp conversations in a single platform. Its AI Assist Pro feature delivers real-time coaching during calls and simplifies follow-up, enabling reps to sell smarter and resolve support issues faster. Teams can leverage advanced capabilities like call routing, IVR, analytics dashboards, and power dialers to maximize efficiency. With integrations across Salesforce, HubSpot, Zendesk, Intercom, Shopify, and 250+ other apps, Aircall seamlessly fits into existing workflows. Businesses benefit from reliable call quality, international number coverage, and scalable features that grow with their needs. Customer stories highlight improvements such as a 4% increase in CSAT scores and the ability to process 25,000+ calls per month with stability and ease. Aircall makes customer conversations more personal, productive, and impactful—without the complexity of traditional systems.

Turn the world into your office. 800.com allows you to manage your business from your cell phone. No contract, advanced calling features, forwarding for cell phones, and advanced calling features Increase conversions, brand recall, higher call response, and SMS messaging. Manage extensions, send professional greetings and manage your account online. 800.com offers standard forwarding as well as simultaneous and sequential ringing. Toll free numbers are the best standard for telephone numbers and will be taken seriously by US customers. Local numbers signal that your company isn't focused on doing business in the entire country. Every 800.com member has access to every phone system tool, regardless of the plan they choose. You will not only help your customers avoid long distance fees but also your company.

Modernizing communication for your business, our service connects your business number seamlessly with your employees' phones. With an array of incredible features, callers can navigate through a dial menu voiced by professional actors, allowing them to make purchases, listen to MP3s, or reach specific staff members with ease. You can conveniently make and receive calls using your number across various devices without the caller being aware of the multiple lines. Employees benefit from hidden in-house menus, can transfer calls, and send voicemails directly to their email, all through an intuitive dialpad. Implementing these business functionalities requires no additional software or hardware, making it hassle-free. Your dialpad becomes a vibrant tool, enabling the effortless transfer of your business or personal number at the touch of a button. Choose from an array of contemporary voice features tailored for your business or personal line, and we'll handle the activation on your existing phone without any effort on your part. Our commitment is to adapt your number to your evolving needs whenever you desire.