Zendesk AI Agents vs Sierra

Zendesk AI Agents9.1Visit Sierra8.0Visit

Higher score Zendesk AI Agents #3 in AI Customer Service Agents 9.1/10 14-day trial Free trial✓ 5 of 5 features Visit Zendesk

vs

Sierra #13 in AI Customer Service Agents 8.0/10 Pricing on request ✓ 5 of 5 features Visit Sierra

• Zendesk AI Agents fits best

  Support teams already using Zendesk

• Sierra fits best

  Brands automating complete service workflows

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Side by side

Feature	Zendesk AI Agents 9.1/10 Visit ↗	Sierra 8.0/10 Visit ↗
At a glance
Editor score	9.1	8.0
Ranking	#3 in AI Customer Service Agents	#13 in AI Customer Service Agents
Best for	Support teams already using Zendesk	Brands automating complete service workflows
Pricing model	Paid	Paid
Starting price	$19/seat/mo	Pricing on request
Free plan	—	Not checked yet
Free trial	14 days	—
Support	Docs	Docs
Integrations	1 integrations	40+ integrations
Built for	Small business, Mid-market, Enterprise	Enterprise
Features Zendesk AI Agents 5/5 · Sierra 5/5
Workflow actions	✓	✓
Human handoff	✓	✓
Voice support	✓	✓
Multilingual support	✓	✓
API access	✓	✓
Specs
Supported channels	social, web, mobile, voice, email, messaging	Voice, website chat, mobile app chat, SMS, WhatsApp, Apple Business Chat, email, ChatGPT
Our review
Pros	Handles multi-step requests and actions across connected systems Supports messaging, email, social, web, mobile, and voice Adds human escalation, quality assurance, and outcome-based improvement	Supports voice, chat, email, SMS, messaging, and ChatGPT Completes exchanges, reservations, subscriptions, warranties, and payments Escalates to human representatives with summaries and conversation context
Cons	Usage pricing is based on successful automated resolutions Advanced Copilot features are reserved for higher-tier plans Its strongest fit is within the Zendesk service ecosystem	Pricing requires a conversation with sales Broad system integrations may require implementation work Designed for complete workflows rather than simple FAQ automation
Our verdict	Zendesk AI Agents are autonomous customer service agents for organizations using Zendesk. They can answer inquiries across messaging, email, social, web, mobile, and voice; reason through multi-step requests; execute actions across… Read the review →	Sierra is a conversational AI platform for businesses that want customer-service agents across voice, chat, email, SMS, messaging, WhatsApp, Apple Business Chat, mobile apps, and ChatGPT. Agents can use knowledge bases, policies, and brand… Read the review →

Strengths and trade-offs

• Zendesk AI Agents — where it wins

  • Handles multi-step requests and actions across connected systems
  • Supports messaging, email, social, web, mobile, and voice
  • Adds human escalation, quality assurance, and outcome-based improvement

  Where it doesn't

  • Usage pricing is based on successful automated resolutions
  • Advanced Copilot features are reserved for higher-tier plans
  • Its strongest fit is within the Zendesk service ecosystem

• Sierra — where it wins

  • Supports voice, chat, email, SMS, messaging, and ChatGPT
  • Completes exchanges, reservations, subscriptions, warranties, and payments
  • Escalates to human representatives with summaries and conversation context

  Where it doesn't

  • Pricing requires a conversation with sales
  • Broad system integrations may require implementation work
  • Designed for complete workflows rather than simple FAQ automation

• Zendesk AI Agents9.1/10 · 14-day trial

  A broad AI customer service layer for teams already working in Zendesk.

  Visit ZendeskFull verdict →
• Sierra8.0/10 · Pricing on request

  A broad AI service platform for brands automating complete customer-service workflows.

  Visit SierraFull verdict →