vioscaleAI
Comparison

Retell AI vs Voiceflow

No clear leader: Voiceflow (80.6) and Retell AI (79.3) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Retell AI full profile →Voiceflow full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Retell AI79
Voiceflow81
Score
vioscaleAI score
Retell AI79 / 100medium · 72%
Voiceflow81 / 100medium · 72%
Pricing
Free tier
Retell AI✓
Voiceflow✓
Model
Retell AIfreemium
Voiceflowfreemium
Price level
Retell AIlow
Voiceflowlow
Starting price
Retell AI$0.00
Voiceflow–
Transparent
Retell AI✓
Voiceflow✓
Integrations
Count
Retell AI1,000
Voiceflow8
Security
Certifications
Disclosure policy
Retell AI–
Voiceflow✓
Gdpr
Retell AI✓
Voiceflow✓
Hipaa
Retell AI✓
Voiceflow✓
Iso27001
Retell AI✓
Voiceflow✓
Soc2
Retell AI✓
Voiceflow✓
Trust center
Reliability
Sla pct
Retell AI99.9
Voiceflow99.95
Status page
Retell AI–
Voiceflow✓
Market
Availability
Content
Faq
Retell AI7 items
Voiceflow6 items

Capabilities

Feature-by-feature on the axes that matter for voice ai agents. “-” means undocumented, not absent.

Capabilities
Deployment model
Retell AINo code saas platform
Voiceflowstandalone_agnostic_ai_layer
Sub second latency and interruption barget in handling
Retell AI✓
Voiceflow✓
Dynamic mid call API function execution
Retell AI✓
Voiceflow✓
Live human handoff and call transfer logic
Retell AI✓
Voiceflow-
Emotion prosody and custom voice cloning
Retell AI✓
Voiceflow-
Inbound reception and ivr routing replacement
Retell AI✓
Voiceflow-
Outbound dialing and campaign management
Retell AI✓
Voiceflow-
Post call transcription and CRM sync
Retell AI✓
Voiceflow-
Voicemail detection and answering machine drops
Retell AI✓
Voiceflow-
Twilio vonage bring your own carrier byoc support
Retell AI✓
Voiceflow-
SOC2 type ii
Retell AI✓
Voiceflow✓
HIPAA compliance for medical appointment setting
Retell AI✓
Voiceflow-
Pricing model
Retell AIPer minute usage based
Voiceflow-

What each one is

The product in its own terms, so the numbers below have context.

Retell AI

A cloud-based platform that deploys conversational AI agents to handle inbound and outbound phone calls, including lead qualification, appointment booking, call routing, and CRM integration.

Independently observed

Voiceflow

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.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Retell AI

from $0.00/messageUsage-basedFree tier

From $0.07/min usage-based pricing. Free tier with $10 credits.

  • Pay-as-you-go$0.07–$0.31/min for voice agents; $0.002+/msg for chat agents
    • 20 concurrent calls included
    • Full platform access
    • Drag-and-drop agent builder
    • Call transfers and routing
    • CRM integration
    • +1 more
  • EnterpriseContact sales
    • Unlimited concurrent calls
    • HIPAA/BAA compliance
    • SSO
    • Custom MSA
    • Custom DPA
    • +3 more
as of verify ↗

Voiceflow

HybridFree tier

Free trial for agencies with transparent usage-based billing; custom enterprise pricing available.

as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Retell AI✓
Voiceflow✓
CLI
Retell AI✗
Voiceflow✓
Deployment
Cloud / SaaS
Retell AI✓
Voiceflow✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (8)
  • Twilio
  • Salesforce
  • HubSpot
  • Zapier
  • n8n
  • Zendesk
  • Shopify
  • OpenAI

Retell AI

48 total - 40 not shared
  • Vonage
  • Telnyx
  • Zoho CRM
  • Make
  • viaSocket
  • Talkdesk
  • RingCentral
  • ServiceTitan
  • Nice
  • Workable
  • Go High Level
  • OpenDental
  • Slack
  • Monday.com
  • Smartsheets
  • Stripe
  • Xero
  • Supabase
  • Webflow
  • WhatsApp
  • ElevenLabs
  • Minimax
  • Fish Audio
  • Cartesia
  • +16 more
Independently observed

Voiceflow

20 total - 12 not shared
  • Anthropic
  • ChatGPT
  • Telegram
  • Alexa
  • NetSuite
  • Pinecone
  • Google Calendar
  • OpenSearch
  • Google
  • Airtable
  • Google Sheets
  • Gmail
Independently observed
Still deciding?

Retell AI or Voiceflow: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.