# Sierra vs Voiceflow

**Leader by vioscaleAI score:** Voiceflow

| Attribute | Sierra | Voiceflow |
|---|---|---|
| **vioscaleAI score** | 55.3 (44% (low)) | 80.6 (72% (medium)) |
| content.faq | `[{"answer":"A platform for building and deploying AI agents across chat, voice, email, SMS, WhatsApp, and ChatGPT. Includes a no-code agent builder, conversation analytics, and automated agent optimization capabilities with enterprise-grade security and compliance. It is indexed under Voice AI Agents.","source":"https://sierra.ai/resources/podcasts/bret-taylor-of-sierra-on-ai-agents-outcome-based-pricing-and-the-openai-board","question":"What is Sierra?","confidence":0.6},{"answer":"Sierra does not publish its prices. Pricing is quoted on request, so the figure depends on your seat count and requirements. We record this as a pricing-transparency signal rather than guessing a number. Pricing changes often, so verify at source before relying on it.","source":"https://sierra.ai/resources/podcasts/bret-taylor-of-sierra-on-ai-agents-outcome-based-pricing-and-the-openai-board","question":"How much does Sierra cost?","confidence":0.6},{"answer":"We have confirmed browser-based access to Sierra. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://sierra.ai/resources/podcasts/bret-taylor-of-sierra-on-ai-agents-outcome-based-pricing-and-the-openai-board","question":"What platforms does Sierra support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Sierra, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://sierra.ai/resources/podcasts/bret-taylor-of-sierra-on-ai-agents-outcome-based-pricing-and-the-openai-board","question":"Can Sierra be self-hosted?","confidence":0.6},{"answer":"We have confirmed 5 integrations for Sierra, including ChatGPT, Voice, Email, SMS and WhatsApp. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://sierra.ai/resources/podcasts/bret-taylor-of-sierra-on-ai-agents-outcome-based-pricing-and-the-openai-board","question":"What does Sierra integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001, HIPAA and GDPR for Sierra. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Sierra not holding them. Always confirm compliance directly before you rely on it.","source":"https://sierra.ai/fr/product/trust-and-reliability","question":"What security certifications does Sierra have?","confidence":0.7},{"answer":"Sierra is available worldwide. Its primary market is the United States. The vendor is headquartered in the United States.","source":"https://sierra.ai/resources/podcasts/bret-taylor-of-sierra-on-ai-agents-outcome-based-pricing-and-the-openai-board","question":"Where is Sierra available?","confidence":0.75}]` | `[{"answer":"A cloud-based platform for building and managing AI conversational agents. Teams use Voiceflow to visually design agent workflows, integrate with multiple LLM providers and third-party services, and deploy agents for customer support automation and business process orchestration. It is indexed under No Code Agent Builders.","source":"https://www.voiceflow.com/blog/zendesk-pricing","question":"What is Voiceflow?","confidence":0.6},{"answer":"We have confirmed browser-based access to Voiceflow. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://www.voiceflow.com/blog/zendesk-pricing","question":"What platforms does Voiceflow support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Voiceflow, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.voiceflow.com/pricing","question":"Can Voiceflow be self-hosted?","confidence":0.6},{"answer":"We have confirmed 14 integrations for Voiceflow, including OpenAI, Anthropic, Zapier, Shopify, ChatGPT, Telegram, Alexa and NetSuite, plus 6 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.voiceflow.com/blog/zendesk-pricing","question":"What does Voiceflow integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001, HIPAA and GDPR for Voiceflow. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Voiceflow not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.voiceflow.com/legal/security","question":"What security certifications does Voiceflow have?","confidence":0.7},{"answer":"Voiceflow is available worldwide. Its primary market is the United States.","source":"https://www.voiceflow.com/pricing","question":"Where is Voiceflow available?","confidence":0.5}]` |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | Sierra enables businesses to create and deploy conversational AI agents across voice, chat, email, SMS, and other channels. The platform uses an outcome-based pricing model where customers pay based on business results delivered rather than traditional fixed fees. | Voiceflow provides teams with visual tools to design and deploy AI agents that handle customer support conversations, integrate with existing business systems, and provide analytics on agent performance. Agents are built using workflows, language models, and custom integrations. |
| features.capabilities | `{"deployment_model":"no_code_saas_platform","post_call_transcription_and_crm_sync":true,"live_human_handoff_and_call_transfer_logic":true,"hipaa_compliance_for_medical_appointment_setting":true}` | `{"soc2_type_ii":true,"deployment_model":"standalone_agnostic_ai_layer","architecture_model":"managed_cloud_saas","mit_or_apache_permissive_oss_license":false,"dynamic_mid_call_api_function_execution":true,"embeddable_iframe_or_chat_widget_export":true,"omnichannel_deployment_web_whatsapp_sms":true,"visual_drag_and_drop_node_canvas_builder":true,"multi_model_selection_openai_anthropic_local":true,"custom_api_tool_calling_and_webhook_execution":true,"rag_knowledge_base_document_upload_and_chunking":true,"team_sharing_and_role_based_access_control_rbac":true,"agent_memory_and_persistent_conversation_threads":true,"api_action_execution_for_refunds_and_order_updates":true,"sub_second_latency_and_interruption_barget_in_handling":true}` |
| integrations.count | 6 | 8 |
| integrations.list | `[{"name":"ChatGPT"},{"name":"Chat"},{"name":"Voice"},{"name":"Email"},{"name":"SMS"},{"name":"WhatsApp"}]` | `[{"name":"OpenAI"},{"name":"Anthropic"},{"name":"Zapier"},{"name":"Shopify"},{"name":"ChatGPT"},{"name":"Telegram"},{"name":"Alexa"},{"name":"NetSuite"},{"name":"Salesforce"},{"name":"n8n","native":true,"category":"workflow_automation","direction":"bidirectional"},{"name":"Pinecone","native":true,"category":"knowledge_base","direction":"bidirectional"},{"name":"Google Calendar","native":true,"category":"calendar","direction":"outbound"},{"name":"Zendesk","native":true,"category":"crm","direction":"bidirectional"},{"name":"OpenSearch","native":true,"category":"search","direction":"bidirectional"},{"name":"Google","native":true,"direction":"inbound"},{"name":"HubSpot","native":true,"category":"crm","direction":"bidirectional"},{"name":"Airtable","native":true,"category":"data","direction":"bidirectional"},{"name":"Google Sheets","native":true,"category":"data","direction":"bidirectional"},{"name":"Gmail","native":true,"category":"email","direction":"outbound"},{"name":"Twilio","native":true,"category":"sms","direction":"outbound"}]` |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"web":true}` | `{"cli":true,"web":true}` |
| pricing | `{"summary":"Outcome-based pricing model (specific tiers not publicly documented)","sourceUrl":"https://sierra.ai/resources/podcasts/bret-taylor-of-sierra-on-ai-agents-outcome-based-pricing-and-the-openai-board","retrievedAt":"2026-09-22T13:51:11.002Z"}` | `{"type":"hybrid","summary":"Free trial for agencies with transparent usage-based billing; custom enterprise pricing available.","freeTier":true,"sourceUrl":"https://www.voiceflow.com/pricing","retrievedAt":"2026-10-15T15:33:38.601Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | unknown | low |
| pricing.transparent | no | yes |
| reliability.sla_pct | - | 99.95 |
| reliability.status_page | - | yes |
| security.certifications | `[{"name":"PCI-DSS Level 1","level":"Level 1","status":"active"},{"name":"ISO 27001","status":"active"},{"name":"ISO 42001","status":"active"}]` | `[{"name":"SOC 2 Type II","level":"Type II","status":"active"},{"name":"ISO/IEC 27001:2022","status":"active"}]` |
| security.disclosure_policy | - | yes |
| security.fedramp | yes | - |
| security.gdpr | yes | yes |
| security.hipaa | yes | yes |
| security.iso27001 | yes | yes |
| security.pci | yes | - |
| security.soc2 | yes | yes |
| security.trust_center | https://sierra.ai/de/product/trust-and-reliability | https://www.voiceflow.com/legal/security |

## Capabilities (Voice AI Agents)

| Capability | Sierra | Voiceflow |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | No code saas platform | standalone_agnostic_ai_layer |
| Sub second latency and interruption barget in handling | - | ✓ |
| Dynamic mid call API function execution | - | ✓ |
| Live human handoff and call transfer logic | ✓ | - |
| Emotion prosody and custom voice cloning | - | - |
| Inbound reception and ivr routing replacement | - | - |
| Outbound dialing and campaign management | - | - |
| Post call transcription and CRM sync | ✓ | - |
| Voicemail detection and answering machine drops | - | - |
| Twilio vonage bring your own carrier byoc support | - | - |
| SOC2 type ii | - | ✓ |
| HIPAA compliance for medical appointment setting | ✓ | - |
| Pricing model | - | - |

*Source: vioscaleAI. Generated 2026-10-16T21:22:12.425Z. "-" = undocumented, not absent.*