Compare AssistCall vs. Hollerback

Zoom Phone is a cloud-based VoIP phone system designed to help businesses manage voice communications, employee collaboration, and customer calls. The platform combines business calling, SMS messaging, voicemail, video conferencing, and team chat within the Zoom Workplace environment. Users can make and receive calls through desktop applications, mobile devices, web-connected systems, and supported physical desk phones. Its call management capabilities include multi-level auto attendants, call queues, call transfers, forwarding, shared lines, and customizable business hours. Built-in AI features generate call summaries, identify action items, prioritize voicemails, and provide contextual assistance during conversations. Zoom Virtual Agent Receptionist adds conversational AI capabilities for answering business questions, booking appointments, and routing callers based on their needs. Call monitoring and reporting tools provide visibility into call volumes, usage patterns, connection quality, and employee communication activity. Zoom Phone integrates with Salesforce, Microsoft Teams, Google Workspace, and other business applications to connect calling activities with existing workflows. Its centralized administration tools support phone number management, device provisioning, user permissions, call recording policies, and communication security across distributed organizations.

Bigly Sales runs AI outbound and inbound calling as a managed service. Its AI voice agents call new and aged leads, qualify them against your criteria, live-transfer interested prospects to your team, book appointments, and answer inbound calls 24/7, with every disposition, transcript and recording written back to your CRM. Bigly's team builds the campaign for you. Scripts are written with Claude, ChatGPT and other leading LLMs, and the platform tests script versions on live calls and keeps the best performer. Bigly also handles phone-number procurement, carrier registration, more than 200 whitelisted local-presence lines, spam monitoring and call routing. Before every dial, the system checks consent, suppression and DNC lists, known TCPA litigants, and state and federal calling rules and quiet hours. The reporting dashboard measures success rate per lead, cost per live transfer and cost per human contact, and breaks the dial-to-transfer funnel into each stage, including transfers lost to an unanswered buffer or a carrier error. Lead sources are ranked side by side by success rate and cost. An hour-by-hour chart shows when leads convert. With the Bigly Sales MCP server, customers can manage campaigns from Claude or ChatGPT: push a list into an active campaign, check minute usage, pull transcripts, or ask which leads want a demo. Customers use it for lead reactivation, speed-to-lead follow-up, appointment setting, inbound answering and warm transfers in insurance, lending, home services, legal and fundraising. It integrates with HubSpot, Salesforce, Zoho CRM, Pipedrive, GoHighLevel and other CRMs, and plans start at $99 a month, with a free 30-minute AI calling setup to begin.

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.

CTM is a cloud-based conversation analytics and lead management platform designed to connect marketing attribution with customer communications and sales outcomes. Formerly known as CallTrackingMetrics, the software provides call tracking, conversation intelligence, lead routing, and contact center functionality. Its call tracking technology uses dynamic number insertion to attribute incoming calls to specific advertising campaigns, keywords, websites, and marketing channels. The platform also tracks SMS conversations, website form submissions, and online chats to provide a consolidated view of customer engagement. AI-powered analytics automatically transcribe, summarize, score, and analyze conversations to identify customer sentiment, purchasing intent, and potential sales opportunities. CTM includes AI voice agents that can answer inbound calls, qualify prospects, schedule appointments, and route inquiries to appropriate team members. Workflow automation tools support lead distribution, customer follow-ups, notifications, and CRM updates based on configurable business rules. Its reporting capabilities include real-time dashboards, advertising ROI analysis, agent performance monitoring, and campaign attribution reports. CTM integrates with marketing, analytics, and CRM platforms through native integrations, APIs, webhooks, and customizable automation tools.

Numa is the AI Customer Operations System built for dealerships that are tired of losing revenue and customers to broken processes. Every day, service calls go unanswered, advisors spend their time fielding "where's my car?" instead of selling work, and managers only find out about unhappy customers after the bad review is already posted. Numa fixes this at the infrastructure level that can follow-up with your customers automatically and give visibility into customer satisfaction to your advisors, reps, and managers. Operator answers and routes every inbound call so nothing goes dark. Status Updates proactively reaches out to customers so advisors stop drowning in callbacks. Voice AI books appointments automatically so customers never wait. LiveCSI flags heat cases in real time so managers can intervene before a CSI score takes the hit. Opportunities can proactively reach out on declined services, open recalls, and equity moments. And it all runs through one unified system: one inbox, one shared context. The result: recovered revenue, freed-up advisors, and a customer experience that increases CSI and builds loyalty.

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.

CallHub is a digital organizing platform built for political campaigns, nonprofits, advocacy groups, unions, and businesses to scale their outreach through calling, texting, email, and workflow automation. The platform includes Predictive, Power, and Auto Dialers for efficient and personalized calling. Its AI-powered Smart Insights analyze call sentiment, while Dynamic Caller ID, Spam Shield, and SHAKEN/STIR compliance ensure higher connection and answer rates. CallHub’s texting tools, Peer-to-Peer Texting, Text Broadcasts, and Text-to-Join support SMS/MMS, URL tracking, and automated replies. Workflow automation enables coordinated multi-channel campaigns, and the mobile app empowers volunteers to participate from anywhere. With native integrations for NationBuilder, NGP VAN, Salesforce, and Blackbaud, CallHub ensures seamless data sync across CRMs. The platform is SOC 2, ISO 27001, GDPR, and TCPA compliant. Trusted by over 200,000 campaigns worldwide, CallHub has powered 1 billion calls and 750 million texts, helping organizations connect, mobilize, and win.

In 60 seconds, activate your international phone number. You can choose from over 120+ countries or 1,000 cities. Forward your calls to any number worldwide. You can route your calls according to the hours and days of your business with robust scheduling options. You can route your calls to your main office during business hours or to voicemail during nonbusiness hours. You can instantly view detailed information about calls to your TollFreeForwarding number. To make informed decisions about outbound sales, and follow-up, learn about your customers' call patterns. Record all or part of your calls to keep track of them. Call detail records are a place where recordings can be stored. They can be downloaded or played at any time.

DialedIn is a cloud-based call center software built for teams that demand reliability, performance, and control at scale. It streamlines operations with intelligent tools that simplify call management, optimize agent workflows, and improve customer experiences. Rather than adding layers of complexity, DialedIn provides a flexible, scalable system that reduces wasted time and helps contact centers operate more efficiently. From inbound and outbound calling to blended environments, DialedIn is engineered to adapt to evolving business needs while maintaining compliance and uptime. • Intelligent Call Routing: Matches each customer with the right agent to improve satisfaction and better balance workloads. • Proven Dial Strategies: Leverages advanced algorithms to enhance contact rates and reduce downtime. • Customizable Tools: Adapts to your specific operational needs, ensuring that the technology works for you, not the other way around. • 100% US-Based Support: Offers comprehensive support, including technical and account management, ensuring maximum utilization of the dialer. • CleanCallerID™: An innovative feature that monitors and swaps out DIDs tagged as SPAM/SCAM by carriers with fresh DIDs automatically, ensuring uninterrupted customer interaction. With built-in analytics, reporting, and automation features, supervisors gain full visibility into agent performance and call outcomes, allowing for smarter decision-making and stronger ROI. DialedIn is not only designed to maximize live connections but also to keep agents connected with customers through secure, dependable, and user-friendly technology. By removing friction from daily operations, DialedIn empowers contact centers of all sizes to focus less on manual processes and more on delivering excellence.

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.