Retell AI vs Voiceflow
Where they differ
Only on Retell AI
- Speech-to-text
- Text-to-speech
- Voice cloning
From the pricing tiers and capability tags we track. A capability missing on one side means we have not recorded it there, not that the tool cannot do it.
At a glance
Retell AI and Voiceflow both appear in this directory's agent listings. Prices below were read from the vendors' own pages, most recently on October 15, 2026. Retell AI starts at $0.07 usage-based; no paid figure is confirmed for Voiceflow. We track speech to text on Retell AI and ai chat on Voiceflow; both cover ai agents and workflow automation. No score and no winner: the facts do the picking.
Capability tags are factual labels we assign when a tool is added; they describe what a tool does, not how well it does it.
Checked against the vendors. Written from each vendor's own site and last re-checked there: Retell AI on October 12, 2026 · Voiceflow on October 15, 2026. Vendors change pricing and features without notice, so confirm anything that decides your purchase on the vendor's page.
Retell AI
Voice AI platform for building and deploying autonomous phone agents
Retell AI is a voice AI platform that builds and runs autonomous phone agents for inbound and outbound calls. Agents operate with roughly 600ms latency, handle mid-sentence caller interruptions, and support language switching across over 50 languages. Engineering teams can construct agents through a drag-and-drop canvas or programmatically via Node.js and Python SDKs.
Voiceflow
Enterprise conversational AI platform to build, launch, and scale agents
Voiceflow is an enterprise conversational AI platform that helps customer experience teams build, launch, and scale chat and voice AI agents. It processes billions of messages across more than 3,000 customers.
Also in agents
A tool we have an affiliate relationship with. It is not part of the comparison above and we are not calling it the better pick.
- Running automated signal-based outbound sequences
- Consolidating separate lead data and sales engagement stacks
- Scaling personalized cold outreach across email and LinkedIn
Retell AI and Voiceflow in action
Each vendor's own walkthrough, from its homepage or official YouTube channel. We don't make these videos and we don't rate them.
Retell AI
Voiceflow
Key features
Retell AI
- Sub-second voice response latency of approximately 600ms
- Interruption handling that pauses speech when callers cut in
- Support for more than 50 languages with mid-call switching
- SIP trunking and BYO telephony support for Twilio and Telnyx
- Live human handoffs with context transfer
Voiceflow
- Build and scale chat and voice AI agents across web, app, WhatsApp, SMS, and voice channels
- Integrate natively with tools such as Zendesk, Salesforce, HubSpot, and Shopify
- Split test and simulate agent versions across development, staging, and production environments
- Review agent logs, custom code executions, and performance analytics
What each one does well
Retell AI
- ✓ Automating inbound support lines and after-hours call routing
- ✓ Running multi-step outbound calling campaigns and appointment scheduling
- ✓ Developers needing programmatic voice primitives and custom LLM integration
Voiceflow
- ✓ Building customer support and CX AI agents
- ✓ Managing multi-client agent deployments for agencies
- ✓ Orchestrating chat and voice automation across multiple channels
People also ask
Does Retell AI or Voiceflow have a free plan?
Retell AI publishes no free plan, and Voiceflow publishes no free plan.
What is the difference between Retell AI and Voiceflow?
Retell AI and Voiceflow are both tracked for ai-agents, workflow-automation. Of the capabilities they do not share, only Retell AI is tracked for speech-to-text, text-to-speech, voice-cloning, developer-api, and only Voiceflow is tracked for ai-chat, app-integration, templates.
How much do Retell AI and Voiceflow cost?
Retell AI: from $0.07 usage-based. Voiceflow: paid.
Answers are generated from the tracked plans and capability tags shown above, so they move when the vendors' pages do.
Full fact sheets, FAQs, and discussion links: Retell AI · Voiceflow · all agents tools