The cloud contact center (CCaaS) platforms businesses use to run phone, chat and messaging support, ranked by how many customers each one says it serves.
Aircall has the biggest published customer base here, 24,000+ companies, and is the easiest contact center for small and mid-size teams. Amazon Connect is second with 10,000+ customers and pure pay-as-you-go pricing from $0.038 per voice minute. Genesys Cloud is third with 8,000+ organizations in over 100 countries and is the enterprise AI pick, with Five9 (4,000+ customers) and Talkdesk (3,000+) close behind.
How it's ranked: Customers, companies, organizations or teams each vendor says it serves, as published on its own website (read November 2026). Zoom, Dialpad and CloudTalk publish no customer count, so they are listed last. Counts are each company's own claims and are measured differently, so treat them as a guide to scale, not an audit.
Aircall · Cloud phone and contact center for sales and support teams
24,000+ companies
The easiest contact center for small and mid-size teams.
Aircall says 24,000+ companies trust it to power their customer communications. It is the easiest pick here for small and mid-size teams: calls, SMS and messaging sit in one shared inbox, and 250+ integrations connect every conversation to tools such as Salesforce, HubSpot and Zendesk, so call logs land in the CRM without manual work. Its AI Assistants give live coaching, transcribe and analyze calls and automate CRM updates and follow-up tasks, while its AI Agents handle routine requests around the clock and escalate complex issues with the full conversation history. Aircall says it meets SOC2 Type II, GDPR and HIPAA standards. It fits sales and support teams that want a phone-first contact center they can set up quickly rather than a heavy enterprise platform.
Best forSmall and mid-size sales and support teams that live in their CRM
Skip it ifYou run a large enterprise contact center with complex routing and workforce planning
Amazon Web Services · Pay-as-you-go cloud contact center with built-in AI agents
10,000+ customers
Best pay-as-you-go pricing.
Amazon Web Services says Amazon Connect has 10,000+ customers globally and handles 20M+ interactions daily, with 12B minutes of AI-powered conversations in 2025. Its pricing is the most unusual here: pay-as-you-go with no minimums, no long-term contracts and no seat-based licensing, and all AI capabilities are included in the channel price. Listed rates are $0.038 per minute for voice, $0.010 per chat message, $0.014 per SMS and $0.080 per email. AI agents handle requests such as returns, account updates and rebookings and suggest replies to human agents, and business users build flows on a visual no-code canvas. It covers voice, chat, email, SMS, web, WhatsApp and Apple Messages, and is HIPAA eligible. It fits teams with uneven call volumes that would rather pay per use than per seat.
Best forTeams that want usage-based pricing with no seat licenses
Skip it ifYou want a fixed per-agent price and a vendor that does the setup for you
Genesys · Enterprise cloud contact center with agentic AI orchestration
8,000+ organizations
The enterprise AI orchestration pick.
Genesys says it serves more than 8,000 organizations in over 100 countries, and it has been in customer experience since 1990, with more than 6,000 employees. Genesys Cloud is its enterprise platform, pitched as agentic AI for every customer experience. AI agents give 24/7 service in any language across voice, text, web, social and WhatsApp, both inbound and outbound, and routing sends each customer to the right person, AI agent or flow with context intact. Agents work in one AI-powered workspace with copilots and knowledge, and Genesys Cloud AI can be embedded in CRM workflows with routing, workforce engagement and channels. Genesys says Electrolux supports 65%+ of service demand with its agentic AI. It fits large contact centers that want deep orchestration and plenty of AI.
Best forLarge enterprises orchestrating AI and human service across many channels
Skip it ifYou are a small team that needs a phone line set up this week
JustCall · Cloud call center with dialers, SMS and AI voice agents
6,000+ teams
Best for outbound-heavy teams.
JustCall says 6,000+ growing teams use it and that it powers over a billion conversations. It is built for teams that call and text a lot: inbound features include IVR call menus, automated call distribution and call forwarding, while outbound teams get sales and predictive dialers, including power, dynamic and 10-line parallel dialers. Local, international and toll-free numbers are available in 70+ countries. AI voice agents act as an AI receptionist, AI SDR and answering service that qualify leads and escalate to humans, and AI agent assist gives live guidance, call scoring, transcription and sentiment analysis. 70+ native integrations keep HubSpot, Salesforce and other tools in sync. A trial includes 14 days of JustCall AI with no credit card required. It fits small and mid-size teams that want dialers and AI in one place.
Best forGrowing sales and support teams that make a lot of outbound calls
Skip it ifYou need a large enterprise platform with deep workforce management
Five9 · Cloud contact center (CCaaS) with AI and workforce optimization
4,000+ customers
The veteran voice-heavy specialist.
Five9 says it has 4,000+ enterprise, mid-market and SMB customers worldwide. It was founded in 2001 and claims 20+ years of cloud contact center experience, with 2,600+ employees and 1,450+ global SI, channel and technology partners. Its scale shows in the voice numbers: 14+ billion call minutes recorded annually and 246K concurrent agent seats, a figure Five9 dates to 12/31/21. The platform covers multichannel customer engagement, analytics and workforce optimization, and uses AI and automation to make agents more productive. Five9 also reports an 86+ Net Promoter Score for its professional services, which matters because a contact center rollout leans on the vendor's implementation team. It fits voice-heavy contact centers that want a long-established CCaaS specialist.
Best forMid-market and enterprise contact centers with heavy call volumes
Skip it ifYou only need a simple business phone for a few people
Talkdesk · CCaaS plus customer experience automation with AI agents
3,000+ customers
The AI-first CCaaS challenger.
Talkdesk says it has 3,000+ global customers in 100+ countries, handling 150M+ customer interactions a month. It was founded in 2011. Talkdesk pairs customer experience automation with contact center as a service on one shared platform, so AI agents and human agents work from the same customer context, knowledge and workflows. Routine interactions go to autonomous AI and sensitive ones to human experts. Named products include Autopilot, Copilot, Navigator, Agentic Outbound, Omnichannel Engagement, Workforce Engagement, Quality Management and Interaction & Quality Analytics, plus a Data Cloud and multi-agent orchestration. Talkdesk cites a Gartner Magic Quadrant Leader placement for CCaaS. It fits mid-size and large contact centers that want a modern AI-first platform without stitching tools together.
Best forContact centers that want AI agents and humans working from the same platform
Skip it ifYou want the smallest, simplest phone tool
Sprinklr · Unified-CXM contact center across voice, social and digital
1,900+ customers
Best for social-heavy customer care.
Sprinklr says it has 1,900+ customers across 19 countries; it was founded in 2009 and is headquartered in New York. Sprinklr Service is its contact center, and its edge is channel breadth: 30+ voice, social and digital channels, including 25+ social channels, from one platform, so agents keep context when a customer moves from a tweet to a phone call. It includes AI agents for self-service, an agent desktop with real-time assistance, AI routing, quality management that scores 100% of interactions, workforce management and a live command center. Sprinklr says Telefonica unified 11K agents on one platform and that its AI handled 78% of cases without agent intervention for Heineken Brazil. It fits large consumer brands with heavy social customer care.
Best forBig brands whose customers reach out on social media as much as by phone
Zoom · Omnichannel contact center built on the Zoom platform
No customer count published
Best for video support and Zoom shops.
Zoom does not publish a customer count for its contact center, so it is ranked after the vendors that do. Zoom Contact Center puts voice, video, chat, SMS, email and social media on one platform, with WhatsApp and Gmail support, and video is the standout: few rivals here make it a core channel. It comes in three tiers. Essentials covers inbound omnichannel with a flow editor, IVR, real-time transcription and PII redaction. Premium adds email and social, progressive and preview outbound dialers and Cobrowse. Elite adds AI Expert Assist, advanced quality management and workforce management. It connects to over 2,500 integrations in the Zoom App Marketplace, and Zoom says Cricut cut call abandonment rates by 90%. It fits teams already on Zoom that want video support.
Best forCompanies already on Zoom Phone and Zoom Workplace
Skip it ifYou need a vendor with a long contact center track record
Dialpad · AI contact center with live coaching and workforce management
No customer count published
Best real-time AI coaching.
Dialpad does not publish a customer count, so it is ranked after the vendors that do. Dialpad Support is its inbound contact center, and it pulls customer history, conversation intelligence, quality management, coaching, real-time assistance and automation into one app. The headline feature is AI Live Coach, which guides agents during calls, while AI agents handle routine requests and hand off to humans with context. It also includes a dialer for outbound calls, workforce management for forecasting and scheduling, and AI CSAT to track customer sentiment, and it integrates with Salesforce, Zendesk and ServiceNow. Dialpad cites 75% more efficient coaching, a 20% reduction in average handle time and a 14% increase in CSAT in 4 weeks. It runs on the same platform as Dialpad's Connect, Sell and Resolve products.
Best forSupport teams that want real-time AI coaching on every call
Skip it ifYou need a vendor that publishes its customer numbers
CloudTalk · Cloud call center with global numbers, dialers and AI voice agents
No customer count published
Best for calling across many countries.
CloudTalk does not publish a customer count, so it is listed last. It is a cloud call center built on its own telephony layer, with local, national, mobile and toll-free numbers in 160+ countries, which makes it a strong pick for teams that call across borders. A Call Flow Designer handles IVR, time-based routing and overflow between teams, with queue callbacks and VIP queues so callers keep their place. Outbound teams get smart, preview and power dialers plus a Parallel dialer for up to 10 lines. It integrates with HubSpot, Salesforce, Pipedrive, Zoho and 100+ more, and is SOC 2 Type 2 audited, ISO/IEC 27001 certified and GDPR compliant. Pricing is Starter $25, Essential $29 and Expert $49 per user per month billed annually. It fits small and mid-size teams.
Best forTeams that call customers in many countries
Skip it ifYou need a vendor that publishes its customer numbers
By published customers, Aircall (24,000+ companies) leads, followed by Amazon Connect (10,000+ customers) and Genesys Cloud (8,000+ organizations). For large enterprise contact centers, Genesys Cloud, Five9 and Talkdesk are the established CCaaS choices.
What is CCaaS?
Contact center as a service: cloud software that runs a contact center's calls, chat, email and messaging, with routing, AI agents, quality management and analytics, instead of on-premises phone hardware. Five9, Talkdesk and Genesys Cloud are examples.
Which contact center software has pay-as-you-go pricing?
Amazon Connect charges by use with no minimums, no long-term contracts and no seat licenses: $0.038 per minute for voice, $0.010 per chat message, $0.014 per SMS and $0.080 per email, with AI included in the channel price.
What is the best contact center for a small business?
Aircall, used by 24,000+ companies, combines calls, SMS and messaging in a shared inbox with 250+ integrations such as Salesforce, HubSpot and Zendesk. JustCall (6,000+ teams) and CloudTalk (from $25 per user per month billed annually) are strong alternatives for calling-heavy teams.
How were these tools ranked?
By the number of customers, companies, organizations or teams each vendor publishes on its own website. These are the companies' own claims; Zoom, Dialpad and CloudTalk publish no count and are listed last.
How we ranked
Customers, companies, organizations or teams each vendor says it serves, as published on its own website (read November 2026). Zoom, Dialpad and CloudTalk publish no customer count, so they are listed last. Counts are each company's own claims and are measured differently, so treat them as a guide to scale, not an audit. Every number on this page comes from the source linked under each pick, and every photo shows the actual product. Brands can't pay to be on this list.
Amazon Connect10,000+ customers
Genesys Cloud8,000+ organizations
