Dialpad vs. Quo (vs. ZoomInfo): Direct Comparison [2026]

Choosing between Dialpad and Quo for your business phone system comes down to a few questions:

• Do you need an enterprise contact center with AI agents, or a simple business phone for a small team?

• Is real-time AI coaching during live calls important, or would after-hours call answering solve your biggest problem?

• Are you managing a sales floor with dozens of reps, or a service business where every missed call is lost revenue?

• Do you need your phone system to integrate with Salesforce and enterprise tools, or is a basic CRM built into your phone app enough?

• And the question most buyers overlook: does your team already know who to call, or is figuring that out the real bottleneck?

In short, here's what we recommend:

Dialpad is the AI communications platform built for enterprises that need voice, video, messaging, and contact center capabilities in one system. Its proprietary DialpadGPT, trained on over seven billion minutes of business conversations, delivers real-time transcription, live agent coaching, and AI-generated call summaries. However, large deployments report call quality degradation during peak loads, support quality drops after initial onboarding, and pricing escalates past the $15 entry point once essential features are added.

Quo (formerly OpenPhone) is the business phone system for startups and small businesses that need a professional number, shared team inbox, and after-hours AI answering without enterprise complexity. Its Sona AI agent answers inbound calls 24/7, captures lead details, and logs summaries automatically. But call quality and connection issues surface in reviews, support is email-only on the Starter plan, and the platform lacks outbound dialing tools, advanced reporting, and the enterprise routing that growing sales teams eventually need.

Both platforms handle the mechanics of business communication well. But here's what neither solves: knowing which prospects to call, when they're likely to engage, and what to say when they pick up. That's the gap between a phone system and a platform that can drive pipeline.

ZoomInfo is an AI GTM platform built on a broad data foundation: 500M contacts, 100M companies, 135M+ verified phone numbers, 120M direct-dial phone numbers, and 200M+ verified business email addresses. Its GTM Context Graph processes 1.5B+ data points daily, combining this data with your CRM records, conversation transcripts, and behavioral signals to reveal the full context of your accounts. That context gives AI the fuel to show not just what happened, but why, and which actions will capitalize on that momentum. Your team can run sales from the GTM Workspace, build GTM plays in GTM Studio, or feed their own tools through the API and MCP. The result: teams using ZoomInfo book nearly 60% more meetings per week and reach an account first in over half of cases.

If you want the intelligence that makes your phone system productive, see how ZoomInfo works.

Dialpad vs. Quo vs. ZoomInfo at a glance

Dialpad is built for enterprise communications, Quo for small business simplicity

Dialpad and Quo target different buyers, and the gap shows in every design decision.

Dialpad is a full unified communications platform. Voice calls, video meetings, SMS, team messaging, and an omnichannel contact center (voice, web chat, SMS, email, Facebook, Instagram, Twitter, WhatsApp) all run through a single application.

Source: Dialpad

The platform was built for organizations consolidating fragmented phone systems. The company offers products for business communications (Dialpad Connect), contact centers (Dialpad Support), and sales teams (Dialpad Sell).

Source: Dialpad

Quo does one thing well: it gives small teams a shared business phone number that keeps everyone on the same page. Every call, text, and voicemail appears in one thread per customer, visible to the whole team.

Source: Dialpad

A plumber's office, a law firm with three attorneys, a property management company with a handful of agents: these are Quo's core users. The platform targets the 99.9% of US businesses that are small businesses, and its design reflects that focus. Setup takes minutes, not months.

The practical difference is clear. Need to route calls across departments, coach agents in real time, and manage workforce scheduling for a 200-person contact center? Dialpad. Need a shared business number where your five-person team can see who called, what they said, and who responded? Quo.

Both platforms bet on AI, but in different ways

Dialpad's AI runs wide and deep. Its proprietary DialpadGPT is trained on over five billion minutes of business conversations and powers real-time transcription, live sentiment analysis, and coaching during every call.

Source: Dialpad

AI Live Coach Cards pop up on agents' screens with objection handling tips when specific phrases are spoken.

Source: Dialpad

AI Playbooks track whether reps follow sales methodologies like BANT or SPIN in real time.

Source: Dialpad

Dialpad's AI Agent handles end-to-end customer requests across voice and digital channels (authentication, order status updates, appointment scheduling) without human intervention. The company claims its agents can answer 90% of common queries and reduce handling times by 70%.

Source: Dialpad

Quo's AI is narrower but practical for its audience. Sona is an always-on AI voice agent that answers inbound calls 24/7, handles common questions, captures caller details, and logs everything into the conversation thread.

Source: QUO

It can send SMS mid-call (texting a scheduling link while the caller is still on the line) and transfer calls to a team member after confirming with the caller.

Source: QUO

For a home services company that loses leads at 7 PM when the office closes, Sona solves a real problem. Cornerstone Caregiving reported saving 3,000 hours per month using Quo's automation features.

The difference: Dialpad's AI makes contact center agents and sales reps better during live interactions. Quo's AI makes sure calls get answered when no human is available. Both are useful. They serve different realities.

The intelligence gap neither phone system fills

Dialpad and Quo both excel at what happens after you dial a number. But they assume you already know who to call.

For small businesses where customers call you, that assumption holds. A plumber doesn't need a database to know the phone is ringing. But for any business running outbound sales, account management, or proactive customer engagement, the question of who deserves your team's time right now is where most productivity is lost.

Sales reps spend hours researching prospects, updating CRM records, and guessing which accounts are worth their time. Phone numbers in CRM systems go stale. Contacts change jobs. Buying committees shift. The phone system works fine. The intelligence feeding it doesn't.

This is what ZoomInfo solves. ZoomInfo operates a comprehensive B2B data platform: 500M contacts, 100M companies, 135M+ verified phone numbers, 120M direct-dial phone numbers, and 200M+ verified business email addresses.

Source: ZoomInfo

That data is verified through a collection and verification system backed by 300+ human researchers, reaching up to 95% accuracy on first-party data.

But raw data is only the starting point. ZoomInfo's GTM Context Graph fuses this B2B data with your CRM records, conversation transcripts, and behavioral signals, processing 1.5B+ data points daily.

Source: ZoomInfo

The result isn't a list of phone numbers. It's an understanding of which accounts are researching solutions like yours, which contacts hold decision-making authority, and what signals suggest they're ready to engage.

In a Fortune 500 competitive RFP analyzing 25 million contacts across vendors, an independent consultant concluded that "no other competitor came even close" to ZoomInfo's data quality.

How ZoomInfo works alongside your phone system

ZoomInfo isn't a replacement for Dialpad or Quo. It's the intelligence that makes your phone system productive.

Through GTM Workspace, sellers see a prioritized feed of accounts with AI-drafted outreach already addressing the concerns the reasoning engine identified.

Source: ZoomInfo

Seismic's sales team boosted productivity by 54% and attributed 39% of pipeline to ZoomInfo signals. Thomson Reuters increased closed-won deals by 40%. Databricks reached prospects 50% faster.

Source: ZoomInfo

Through GTM Studio, marketers and RevOps teams describe audiences in natural language, build multi-channel plays, and activate them across email, calls, ads, and direct mail. Expansion plays that used to take 3 weeks now launch in 30 minutes.

Source: ZoomInfo

Through APIs and MCP, the same intelligence flows into any tool your team already uses, whether that's Dialpad, Quo, Salesforce, HubSpot, or a custom-built internal system.

Source: ZoomInfo

API access is included in all relevant plans, and the MCP server connects AI models directly to ZoomInfo's data as a native tool.

Source: ZoomInfo

The practical outcome: instead of your sales rep opening Dialpad or Quo and guessing who to call next, ZoomInfo has already identified the accounts showing buying signals, surfaced the direct-dial numbers of the right contacts, and drafted context-aware outreach. The phone system handles the call. ZoomInfo handles the intelligence behind it.

Pricing reflects each platform's target market

Dialpad starts at $15/user/month (billed annually) for its Standard plan, but that entry point is misleading. The Standard plan limits you to one office location and excludes CRM integrations, which require the Pro plan at $25/user/month (annual).

Reviews flag that pricing climbs to $25+ once essential features are added, with confusing invoices and hidden add-on fees. Dialpad Support (contact center) and Dialpad Sell (sales dialer) are separate products with their own pricing, and calls through those products incur per-minute rates starting at $0.01/min inbound and $0.02/min outbound.

Quo is more straightforward. The Starter plan costs $19/user/month ($15 annually) and includes one phone number, unlimited US/Canada calling and texting, voicemail transcripts, and Sona AI with 1,000 free credits (about 10 AI calls) per month.

The Business plan at $33/user/month adds AI call summaries, phone menus, analytics, auto call recording, and HubSpot/Salesforce integrations. The Scale plan at $47/user/month adds AI call tags, dedicated onboarding, and phone support

Additional Sona usage beyond the free tier runs from $25/month for 40 AI calls up to $199/month for 600 calls. One caution: the free-tier overage rate for annual plan customers is $1.00 per call, so teams expecting meaningful AI call volume should budget for a credit tier add-on.

ZoomInfo offers ZoomInfo Lite as a permanent free tier (no credit card, no time limit) with access to 100M+ verified profiles, 10 monthly export credits, the ReachOut Chrome Extension, and WebSights Lite.

Source: ZoomInfo

Paid plans are custom-quoted based on seats, credit volume, and feature access. ZoomInfo is premium-priced, but the ROI math differs: Seismic saved 11.5 hours per week per seller, and Snowflake achieved 200% higher conversion rates on ZoomInfo-scored accounts.

Call quality and reliability matter more than features

Both Dialpad and Quo face user-reported reliability concerns.

Dialpad's dual-cloud architecture delivers a 100% uptime SLA for enterprise users with no required maintenance windows. Small teams generally experience stable call quality.

But G2 reviewers report that large deployments see call degradation during peak loads and system updates, including dropped calls and one-way audio. AI transcription can miss words or struggle with industry-specific terminology.

Quo users on G2 report intermittent glitches, dropped calls during long conversations, and missed call notifications. Some users report that ported numbers do not consistently receive text messages after migration, a real risk for businesses that rely on both calls and texts from an existing number.

For businesses where every call is a potential sale, these reliability issues matter. Neither platform's problems are dealbreakers, but they're worth testing during a trial before committing.

Support quality varies by plan tier

Dialpad's Standard plan includes 24/5 chat and web support. Pro and Enterprise customers get 24/7 coverage with phone support. Both G2 and TrustRadius reviews note that support is strong during onboarding but degrades after go-live, with slow responses and difficulty resolving billing or account issues.

Quo's Starter plan is email-only. Business adds live chat. Only Scale ($47/user/month) includes phone support and dedicated onboarding. Multiple reviewers flag the absence of real-time support on the Starter plan as a frustration during outages or urgent issues.

ZoomInfo provides support through a Help Center, ZoomInfo University, Release Notes Hub, and community, with direct support via phone at (866) 904-9666.

Enterprise customers get dedicated customer success managers. ZoomInfo's onboarding program won Rocketlane's Golden Comet award for Best Customer Onboarding Team of 2024, and the redesigned 30-to-90-day program drove a 25% improvement in customer satisfaction scores.

Source: ZoomInfo

Security and compliance comparison

All three platforms hold enterprise-relevant security certifications, but coverage differs.

Dialpad holds SOC 2 Type II, HIPAA readiness with one-click BAA, ISO 27001, ISO 27017, ISO 27018, and CSA membership. Calls are encrypted via TLS and WebRTC with SRTP, and data at rest uses AES 256-bit encryption on Google Cloud Platform. However, G2 reviewers note vague retention controls, with administrators unable to verify whether redaction meets HIPAA or FINRA requirements.

Source: Dialpad

Quo holds SOC 2 Type II certification and runs on AWS with AES-256 encryption at rest and TLS 1.3 in transit. HIPAA compliance with BAA is available on Business and Scale plans, but not on Starter. Quo does not document ISO 27001 certification in its public security materials, which may limit adoption in regulated industries requiring that standard.

ZoomInfo maintains the broadest compliance portfolio: ISO 27001, ISO 27701, SOC 2 Type II, TRUSTe GDPR, and TRUSTe CCPA certifications, all renewed annually. ZoomInfo is a registered data broker in California and Vermont and maintains a dedicated Trust Center.

Dialpad vs. Quo vs. ZoomInfo: Which should you choose?

The right choice depends on what problem you're solving.

Choose Dialpad if:

• You run a contact center or distributed sales team that needs enterprise communications

• Real-time AI coaching and agent assist during live calls are priorities

• You're consolidating multiple phone systems into one platform

• You need omnichannel support across voice, chat, SMS, email, and social

• Your team is large enough to justify the complexity and cost

Choose Quo if:

• You're a small business or startup that needs a professional phone presence fast

• Shared team visibility into every customer conversation matters more than advanced routing

• After-hours AI answering would capture leads you're currently missing

• Your budget is under $50/user/month and simplicity is a priority

• You need a basic built-in CRM without a separate subscription

Use ZoomInfo alongside either if:

• Your outbound team needs verified direct-dial numbers that connect, not bounced calls to switchboards

• Buyer intent signals would help you prioritize accounts that are researching solutions

• You're tired of reps spending hours on manual research instead of selling

• You want AI-drafted outreach based on real account context, not generic templates

• You need the intelligence that turns a phone system into a pipeline generator

Start free with ZoomInfo Lite or request a demo here.

A phone system handles the call. An intelligence platform tells you which calls will move your business forward. The most effective teams pair a communication tool that fits their size with an intelligence layer that ensures every dial is backed by data.

Dialpad vs. Quo vs. ZoomInfo FAQ

What is the core difference between Dialpad, Quo, and ZoomInfo?

Dialpad is an enterprise AI communications platform combining business phone, video, messaging, and contact center in one system. Quo is a business phone system for startups and small businesses, built around shared team numbers and an AI answering agent. ZoomInfo is an AI GTM platform that provides the data, intent signals, and account context your team needs to prioritize outreach and engage the right buyers. Dialpad and Quo handle communication mechanics; ZoomInfo handles the intelligence that drives productive conversations.

Which platform is cheaper: Dialpad or Quo?

Quo is more affordable for small teams. Its Starter plan is $19/user/month (or $15 annually) with unlimited US/Canada calling and texting included. Dialpad starts at $15/user/month (annual) but climbs to $25+ once you add CRM integrations and essential features. Dialpad's contact center and sales dialer products are priced separately and include per-minute call charges.

Can I use ZoomInfo with Dialpad or Quo?

Yes. ZoomInfo is not a phone system; it complements whichever communication platform you use. ZoomInfo provides verified direct-dial phone numbers, buyer intent data, and AI-prioritized accounts. Your team uses that intelligence to make calls through Dialpad, Quo, or any other phone system. ZoomInfo also offers APIs, MCP, and native integrations with CRMs that connect to both platforms.

Which platform has better AI capabilities?

Each platform's AI serves a different purpose. Dialpad's DialpadGPT powers real-time transcription, live coaching during calls, sentiment analysis, and autonomous AI agents for customer service. Quo's Sona AI agent answers inbound calls 24/7, captures leads, and generates summaries. ZoomInfo's GTM Context Graph uses AI to identify in-market accounts, prioritize outreach, draft personalized emails, and surface buying signals across your addressable market. Dialpad and Quo apply AI to conversations; ZoomInfo applies AI to the strategy behind those conversations.

Is Quo reliable enough for a business that depends on phone calls?

Quo serves 90,000+ businesses and holds a 4.7-star rating across 3,200+ reviews. However, some users report intermittent call quality issues, dropped calls, and missed notifications. Businesses where every inbound call represents significant revenue should test reliability during the 7-day trial before committing, particularly with ported numbers where some users report inconsistent SMS delivery.

Does Dialpad actually cost $15/month?

The $15/user/month Standard plan exists, but it's limited to one office location, excludes CRM integrations (Salesforce, HubSpot), and provides only 24/5 web and chat support. Most businesses need the Pro plan at $25/user/month for Salesforce integration and 24/7 phone support. Contact center and sales dialer products carry additional per-user and per-minute charges. Reviews note that actual costs exceed the advertised entry price once essential features and add-ons are factored in.

What does ZoomInfo Lite include for free?

ZoomInfo Lite is a permanent free tier (no credit card, no time limit). It includes access to 100M+ verified profiles, 10 monthly export credits, individual and company searches, email addresses, the ReachOut Chrome Extension, WebSights Lite (up to 10 website visitor reveals per day), built-in email sending, and HubSpot integration. It does not include mobile phone numbers, full intent signals, Chorus conversation intelligence, or advanced AI features available on paid plans.

Which platform is best for outbound sales teams?

ZoomInfo paired with Dialpad is the strongest combination for outbound sales. ZoomInfo identifies accounts showing buying intent and provides verified direct-dial numbers, while Dialpad Sell offers a sales dialer with power dialing, local presence, and real-time AI coaching. Quo lacks outbound dialing tools and is built for inbound communication, making it less suitable for high-volume outbound sales operations.