Amazon Polly vs Retell AI

Amazon Polly9.3Visit Retell AI8.6Visit

Higher score Amazon Polly #2 in Voice Ai Tools 9.3/10 Paid ✓ 2 of 4 features Visit Amazon Polly

vs

Retell AI #8 in Voice Ai Tools 8.6/10 Paid ✓ 0 of 4 features Visit Retell AI

• Amazon Polly fits best

  Production TTS via a mature cloud API

• Retell AI fits best

  Affordable production phone agents

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Side by side

Feature	Amazon Polly 9.3/10 Visit ↗	Retell AI 8.6/10 Visit ↗
At a glance
Editor score	9.3	8.6
Ranking	#2 in Voice Ai Tools	#8 in Voice Ai Tools
Best for	Production TTS via a mature cloud API	Affordable production phone agents
Pricing model	Paid	Paid
Starting price	$4/unit/mo	$0.07 usage-based
Free plan	Not checked yet	—
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Features Amazon Polly 2/4 · Retell AI 0/4
Voice cloning	✓ (best)	Not checked yet
Real-time generation	Not checked yet	Not checked yet
API access	✓ (best)	Not checked yet
Commercial use	Not checked yet	Not checked yet
Specs
Languages supported	Not checked yet	Not checked yet
Included minutes	Not checked yet	Not checked yet
Output formats	Not checked yet	Not checked yet
Our review
Pros	Four voice engines spanning standard, neural, long-form, and generative output Real-time streaming, asynchronous synthesis, SSML, lexicons, and speech marks 42 languages, regional accents, multiple formats, and 24/7 support	Handles inbound calls, outbound campaigns, IVR, and DTMF. Warm transfers pass transcript context to human agents. Includes analytics, transcripts, and simulation testing.
Cons	Usage is billed per million characters across paid voice engines Engine prices and included request types differ by plan Cloud deployment centers work on APIs, console, CLI, or SDKs	Usage-based rates vary by model, voice, telephony, and add-ons. Pay as you go is not an unlimited free plan. Enterprise pricing is custom.
Our verdict	Amazon Polly is a cloud text-to-speech service for turning plain text or SSML into audio streams and files. It serves solo developers, small teams, mid-market organizations, and enterprises building IVR systems, chatbots, e-learning,… Read the review →	Retell AI is a platform for building, testing, deploying, and monitoring AI voice agents for business phone operations. It is suited to teams that want agents to answer inbound calls, place outbound campaigns, book appointments, or connect… Read the review →

Strengths and trade-offs

• Amazon Polly — where it wins

  • Four voice engines spanning standard, neural, long-form, and generative output
  • Real-time streaming, asynchronous synthesis, SSML, lexicons, and speech marks
  • 42 languages, regional accents, multiple formats, and 24/7 support

  Where it doesn't

  • Usage is billed per million characters across paid voice engines
  • Engine prices and included request types differ by plan
  • Cloud deployment centers work on APIs, console, CLI, or SDKs

• Retell AI — where it wins

  • Handles inbound calls, outbound campaigns, IVR, and DTMF.
  • Warm transfers pass transcript context to human agents.
  • Includes analytics, transcripts, and simulation testing.

  Where it doesn't

  • Usage-based rates vary by model, voice, telephony, and add-ons.
  • Pay as you go is not an unlimited free plan.
  • Enterprise pricing is custom.

• Amazon Polly9.3/10 · Paid

  A production-focused cloud TTS API with four engines, streaming, SSML, and multilingual output.

  Visit Amazon PollyFull verdict →
• Retell AI8.6/10 · Paid

  Usage-based voice agents for inbound and outbound business calls.

  Visit Retell AIFull verdict →