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AI Voice Agent Comparison

Vapi VS Retell

Choosing between Vapi and Retell for your voice AI needs? This comparison breaks down the key differences to help you decide.

Here's our comprehensive guide to help you choose the right AI voice agent solution for your business's needs. Get into the details to compare pricing, features, and performance.

Vapi Logo
RATING
3.9
Ease of Use
Features
Support
Developer-Focused
Retell Logo
RATING
4.2
Ease of Use
Features
Support
Voice Synthesis Focused

Vapi

Vapi is a developer-focused voice AI platform that provides robust APIs and customization options. It's designed for technical teams who need flexibility and control over their voice implementations.

Retell

Retell specializes in high-quality voice synthesis with natural-sounding AI voices. Their platform focuses on realistic voice generation for various applications with relatively simple implementation.

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Features

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Key Feature Comparison

Vapi Strengths

  • Developer-focused API with extensive customization
  • Strong WebRTC integration capabilities
  • Robust voice processing pipeline
  • Good documentation for technical teams
  • Flexible integration with existing systems

Retell Strengths

  • User-friendly interface with simpler setup
  • Strong focus on realistic voice synthesis
  • More limited customization options
  • Better out-of-the-box conversation capabilities
  • Fewer integration options for complex systems
Vapi Logo
Retell Logo
Developer Experience
4.5

Advanced API with comprehensiv...

3.8

Good developer tools with easi...

Voice Quality
4.0

High-quality voices with good ...

4.7

Industry-leading voice synthes...

Integration Capabilities
4.8

Extensive integration options ...

3.5

More limited but straightforwa...

Pricing Model
3.7

Usage-based pricing, can be ex...

4.0

More predictable pricing struc...

Customer Support
3.5

Developer-focused support with...

4.2

More accessible support for no...

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Pricing

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The Pricing Comparison

Retell offers a more transparent and cost-effective pricing model compared to Vapi. With a flat rate of $0.07/min for Voice AI, Retell eliminates Vapi's additional fixed platform fees, which can drive up costs. Phone numbers are significantly more affordable at just $2.00/month, while Vapi's pricing varies.

Retell also includes Speech-to-Text at no extra charge, unlike Vapi's $0.01/min fee. Plus, Retell provides Verified Phone Numbers to enhance call deliverability and reduce spam risks.

Vapi Logo
Retell Logo
Voice AI

$0.05/min + $0.066 fixed platform fee (price varies)

$0.07/min

Phone Number

Variable Price

$2.00/month

Speech to Text

$0.01/minute

Included

Adds-on

Voice Quality Upgrades

Verified Phone Number

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Enterprise-Grade

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Scalability & Reliability

Vapi ensures top-tier security with HIPAA, SOC 2 Type 1 & 2, and GDPR compliance across all plans. Retell matches these compliance standards but with different implementation approaches. Both platforms offer high reliability with 99.99% uptime and no rate limits, providing businesses with scalable, enterprise-ready solutions.

Vapi Logo
Retell Logo
Compliance

HIPAA compliant, SOC2, GDPR

HIPAA, SOC2 Type 1&2, GDPR

Rate limit

Not Limit

Not Limit

Uptime to date

99.99%

99.99%

Security

Strong encryption protocols

Top-tier security protocols