AI SUPPORTSOFTWAREBrowse 30 tools 
Side-by-side comparison
Compare audience fit, channels, integrations, knowledge sources, public pricing information, and operational considerations.
Both products appear in ai support agents and voice and contact-center ai. That overlap gives you a starting point; it does not mean the products cover the same channels, workflows, or deployment model.
AI agents that answer and act across Zendesk messaging, email, web forms and voice workflows.
Support organizations standardizing ticketing, knowledge, routing and AI automation in one suite.
Explore its buying criteria: AI support agents · AI help desks · Voice and contact-center AI.
Full Zendesk AI profile and vendor sources · Checked 2026-09-02
Developer platform for building, testing, deploying and monitoring production voice and chat agents.
Developers and startups building phone agents with APIs, webhooks and custom logic.
Explore its buying criteria: AI support agents · Voice and contact-center AI · Agent builders.
Full Retell AI profile and vendor sources · Checked 2026-09-02
The table below preserves each vendor’s scope and qualifiers. An unlisted feature is unverified here; it is not a claim that the feature is unavailable.
Before you decide
Zendesk AI: Agent licenses plus AI resolution usage. Support Team and Suite Team include 5 automated resolutions per agent/month; Suite Professional includes 10, subject to a 10,000 annual cap. Messaging AI requires messaging access; advanced AI capabilities may require another package. Retell AI: Voice cost combines infrastructure, speech, model, telephony and optional per-minute features. Chat is charged per AI message. Phone numbers cost $2/month; 20 concurrent calls are included, with additional concurrency $8/month each. Use the selected configuration to estimate the monthly bill. Ask both vendors to quote the same expected workload, required channels, and implementation scope. Include required subscriptions and usage charges before comparing the total; the listed starting prices alone may cover different work.
The recorded sources for Zendesk AI include Zendesk Knowledge; ticket history; help center; connected business systems. For Retell AI, they include prompts; documents/knowledge bases; API tools; business systems. Ask each vendor to demonstrate ingestion or live access for the exact system you use, with permissions and refresh behavior. A source missing from this directory is not proof that a vendor cannot support it.
Use the same sample of real support requests, approved knowledge, and escalation rules in both pilots. Can it cite or restrict answers to approved knowledge? What happens when the agent is uncertain? Which actions can it complete beyond answering? Record answer quality, completed tasks, human handoffs, and total cost in the buyer worksheet. Check these specific cautions before launch: Zendesk AI: AI consumption is measured by automated resolutions/allowances; confirm current allowance and overage terms. Retell AI: Telephony, model, speech and other provider costs may be separate; technical integration work is expected.
Record your requirements and pilot results in the buyer worksheet →
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| Criterion | Zendesk AI | Retell AI |
|---|---|---|
| Best fit | Support organizations standardizing ticketing, knowledge, routing and AI automation in one suite. | Developers and startups building phone agents with APIs, webhooks and custom logic. |
| Key capabilities | automated resolutions, intent detection, authorized actions, handoff, agent copilot, voice AI | voice agent builder, drag-and-drop flows, call transfer, DTMF, transcripts, simulation testing, webhooks |
| Company sizes | mid-market, enterprise | small, mid-market, enterprise, developer/startup |
| Channels | messaging, email, web form, voice | phone, web chat, SMS, telephony |
| Integrations | Zendesk Support, Zendesk Knowledge, CRM and marketplace apps, APIs | telephony providers, webhooks, REST APIs, CRM/helpdesk via APIs |
| Knowledge sources | Zendesk Knowledge, ticket history, help center, connected business systems | prompts, documents/knowledge bases, API tools, business systems |
| Pricing model | Agent licenses plus AI resolution usage. Support Team and Suite Team include 5 automated resolutions per agent/month; Suite Professional includes 10, subject to a 10,000 annual cap. Messaging AI requires messaging access; advanced AI capabilities may require another package. | Voice cost combines infrastructure, speech, model, telephony and optional per-minute features. Chat is charged per AI message. Phone numbers cost $2/month; 20 concurrent calls are included, with additional concurrency $8/month each. Use the selected configuration to estimate the monthly bill. |
| Pricing summary | Support Team $25/agent/month for email AI; omnichannel Suite Team $69 or Suite Professional $149 (USD, monthly subscription). Additional automated resolutions cost $1.50 committed or $2 pay as you go. | Pay as you go: advertised voice range $0.07–$0.31/minute and chat from $0.002/message (USD). No base subscription commitment; selected models, telephony and add-ons can increase the total. Enterprise is quoted. |
| Free plan or trial | 14-day Suite Professional trial with AI evaluation access; available capabilities vary. | $10 in free credits to build and test; pay-as-you-go access has no commitment. |
| Differentiator | Broad helpdesk and contact-center footprint with native AI agent actions. | Transparent usage entry point and production-oriented voice tooling for developers. |
| Considerations | AI consumption is measured by automated resolutions/allowances; confirm current allowance and overage terms. | Telephony, model, speech and other provider costs may be separate; technical integration work is expected. |
Support organizations standardizing ticketing, knowledge, routing and AI automation in one suite.
Broad helpdesk and contact-center footprint with native AI agent actions.
Developers and startups building phone agents with APIs, webhooks and custom logic.
Transparent usage entry point and production-oriented voice tooling for developers.
Verify current pricing, limits, security, and required integrations directly with each vendor before purchasing.