Retell AI vs Synthflow AI: Features, Pricing and User Reviews 2026
Compare features, pricing, reviews, and more to make an informed decision
Retell AI
Retell AI is a voice agent platform for building human-like AI phone agents with lightning-fast responses and natural conversations.
Synthflow AI
Synthflow AI creates human-like voice agents that automate phone calls for customer service, sales, and appointment scheduling.
Retell AI
Retell AI is a voice agent platform for building human-like AI phone agents with lightning-fast responses and natural conversations.
Synthflow AI
Synthflow AI creates human-like voice agents that automate phone calls for customer service, sales, and appointment scheduling.
Retell AI
Human-like voice agents with sub-second response times
Multi-language support for 18+ languages
BYOC telephony integration with major providers
Warm transfers and IVR navigation capabilities
Real-time webhooks and API connectivity
Batch calling and verified phone numbers
Enterprise security and compliance (SOC 2, HIPAA, GDPR)
Advanced testing and monitoring tools
Knowledge base auto-sync
Custom LLM integration support
Synthflow AI
No-code voice agent builder with drag-and-drop interface
Human-like conversations in 30+ languages
Real-time appointment booking and call transfers
Integration with CRMs, calendars, and business tools
24/7 automated customer support and lead qualification
White label platform for agencies and resellers
Enterprise-grade security and compliance features
Analytics dashboard for performance monitoring
Retell AI
Retell AI uses a simple pay-as-you-go pricing model with no platform fees or hidden costs. All new users receive $10 in free credits, equal to about 60 minutes of calls to test the platform.
Standard pricing starts at $0.07-$0.08 per minute depending on voice quality and features selected. This includes voice synthesis, speech recognition, and basic telephony. Additional costs may apply for premium voice models and advanced language models.
Enterprise plans offer significant discounts for high-volume users, with rates dropping to as low as $0.05 per minute for customers spending over $3,000 monthly. Enterprise customers also receive dedicated support through private Slack channels and priority assistance.
The transparent pricing model means you only pay for actual usage, making it cost-effective for businesses of any size without requiring large upfront investments.
Synthflow AI
Synthflow AI offers flexible pricing plans that scale with your business needs. All plans include a 14-day free trial to test the platform before committing.
Starter Plan: Pay-as-you-go model where you only pay for voice API, language model, and transcription costs during development.
Pro Plan: $0.13 per minute after 2,000 included minutes, perfect for businesses with low to moderate call volumes.
Growth Plan: $0.12 per minute after 4,000 included minutes, offering 10% savings for higher-volume users.
Agency Plan: $0.12 per minute after 6,000 included minutes with white-label features, unlimited sub-accounts, and 30-day onboarding support.
Enterprise Plan: Custom pricing starting as low as $0.08 per minute for high-volume businesses, includes SIP trunking, dedicated support, compliance features, and guaranteed uptime agreements.