Synthflow vs. Retell: Best Alternative for Call Automation
Features
Synthflow vs. Retell: Feature Comparison
When it comes to functionality, Synthflow offers broader multilingual support, advanced workflow customization, and real-time CRM integrations. Retell provides strong baseline voice AI features, but lacks some of the flexibility and enterprise-grade options needed for complex deployments.
Pricing & Implementation
Free Tier / Trial
14-day Trial
$10 Free Credits
Price per Minute
$0.08/min
$0.08/min
Transparent Pricing
Custom
Annual Commitment (Enterprise)
From $30K
Custom
Deployment Time
Under 3 weeks
Unknown
No-Code Setup
Dedicate Onboarding Team
Concurrent Calls
2K
Custom
Volume Discounts
Dedicated CSM
Pricing
Synthflow vs. Retell: Pricing Comparison
Both platforms price usage by the minute, but Synthflow stands out with transparent pricing, flexible volume discounts, and lower enterprise entry points (starting at ~$30K annually). Retell’s costs are often custom-quoted, which can make budgeting less predictable.
Agent Features & Developer Tools
Post-Call Analysis
Built-in
Test Center (Simulations)
Persistent Memory
-
Agent Builder (GUI)
No-code
LLM Testing Sandbox
Built-in GPT UI
Multi-Prompt Support
Multi & single
Available Languages
30+
30+
Latency
< 500 ms
<800ms
Emotion & Prosody Controls
Partial
Multi-Speaker Handling
-
-
Knowledge Base Integration
Webcall Support
Custom Telephony (SIP Trunking)
Any SIP provider
WFM/QA Platform Integration (NICE, Verint, Calabrio)
Via SIP/API
SIP Trunking (BYOC)
Overage Handling
-
STIR/SHAKEN Compliance
Full Whitelabel
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Salesforce Integration & Oauth
Prompt Builder SDK
-
Native CRM Integrations
CCaaS Integrations
-
APIs & Webhooks
Cost Breakdown
Compare the Total Cost of Usage
Discover how Synthflow provides more value at a lower cost.
Synthflow
$0.13/min
$0.13/min
Everything under one unified service
x2 Savings
Retell
$0.13/min
$0.07/min
Platform
$0.08/min
Voice
$0.06/min
LLM
$0.04/min
Transcription
$0.02/min
Telephony
AI Bundle: Maximum Performance, Minimum Cost
Access a complete package of OpenAI LLM, transcriber, and voice API optimized for top-tier performance at the lowest price.
Plug & Play Setup: Seamless Integrations
Skip the trial-and-error as our fully tested, high-performance tech stack saves you time, effort, and money.
Ultimate Flexibility:
Use Your Own API Keys
Enjoy complete control and customization with an enterprise package; integrate your API keys for a smooth, tailored experience.
Enterprise-Grade
Synthflow vs. Retell: Security, Scalability & Reliability
Synthflow is fully compliant with SOC 2, HIPAA, GDPR, and ISO 27001, making it ready for enterprise security reviews. Its infrastructure ensures latency under 800ms and scales easily for global teams. Retell offers core compliance and reliability, but lacks the same breadth of certifications and proven scalability.
Agent Features & Developer Tools
SOC 2 / GDPR
PCI-DSS Level 1
-
HIPAA Compliance
ISO 27001
-
Data Encryption
Audit Logs & RBAC
On-Prem Option
GDPR
Our Benefits
Why Businesses Choose Synthflow
Enterprise-grade voice AI—without the heavyweight pricing
Synthflow delivers the capabilities large teams need, but at a budget range that fits $30K–$100K rollouts, not just all-in enterprise overhauls. Ideal for departments, pilots, or scaling without red tape.
Fast voice response under 800ms
Latency matters in voice. Synthflow’s infrastructure ensures real-time responsiveness, even during high-volume or concurrent call traffic.
More flexibility in agent design (without writing code)
Build multi-prompt flows, add conditional logic, and handle complex conversation paths—visually, with no need for dev support.
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Test before you deploy
With Synthflow’s LLM prompt testing sandbox, your team can iterate quickly and safely—no staging environments or backend hacks required.
Use your existing telephony stack
Full support for SIP trunking, Twilio, and BYOC means IT teams stay in control of routing, carriers, and compliance.
Ready for global teams
With 30+ languages and multilingual voice cloning, you can support customers across regions without duplicating agent work.
Meets enterprise security requirements out of the box
Synthflow is fully compliant with SOC 2, HIPAA, GDPR, and ISO 27001, helping you move faster through procurement and security review.
CASE EXAMPLE
The ROI for Your Business
Unlock measurable impact with AI voice agents. Synthflow helps you save time, reduce costs, and improve customer experience — without trade-offs.
FAQ