Amazon Polly vs Google Cloud TTS
Amazon Polly (Cloud-utility TTS at commodity prices) and Google Cloud TTS (Hyperscaler TTS with the broadest voice/language catalog) are Text-to-speech APIs platforms, priced from $30/1M chars and $30/1M chars respectively. Below: the bottom line, verified head-to-head facts, and real production costs.
Google Cloud TTS wins 3 of 4 use case verdicts and leads on every core differentiator in the facts. It offers 380 voices vs 100 for Polly, 75 languages vs 40, instant voice cloning vs none, a 5000 char request limit vs 3000, and 1000 requests per minute default concurrency vs 80 concurrent for Polly. Pricing is identical at both tiers. These advantages make Google Cloud TTS the safer default for virtually all buyer types.
Google Cloud TTS is our pick for most teams. Start there, or weigh the use-case verdicts below.
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Head-to-head facts
Every row independently verified| Fact | Amazon Polly | Google Cloud TTS |
|---|---|---|
| Price per 1M characters (flagship model) | 30 $/1M charsJul 20 | 30 $/1M charsJul 20 |
| Free tier quota | 5M chars/mo standardJul 20 | 4M chars/month free (Standard, WaveNet)Jul 20 |
| Streaming audio output | ✓ YesJul 20 | ✓ YesJul 20 |
| Instant voice cloning | ✗ NoJul 20 | ✓ YesJul 20 |
| Languages supported | 40 languages and variantsJul 20 | 75Jul 20 |
| Model weights license | closedJul 20 | closedJul 20 |
Pricing: true cost at 3 usage tiers
Effective monthly bill from published rates. Subscription plans resolve to plan fee plus overage; ~950 characters ≈ 1 audio minute.Verdicts by use case
For audiobooks, long-input handling matters: Google supports 5000 chars per request versus Amazon Polly's 3000, reducing chunking overhead for book-length text. Google also offers 380 voices across 75 languages versus Amazon Polly's 100 voices across 40 languages, giving more narrator options. Flagship pricing is identical at 30 dollars per 1M chars for both. Amazon Polly has pronunciation dictionaries, which help with audiobooks, but Google's larger per-request limit and vastly bigger voice library tip the balance.
Both tools share identical flagship and fast pricing at 30 and 4 dollars per 1M chars respectively, both usage-priced. Google edges ahead on developer flexibility: it supports 380 voices versus Amazon Polly's 100, handles 5000 chars per request versus Polly's 3000, and defaults to 1000 requests per minute versus Polly's 80 concurrent. Google also offers instant voice cloning, which Polly lacks. Polly counters with word-level timestamps and pronunciation dictionaries, useful for precise audio alignment. Overall, Google's higher concurrency ceiling, larger input limit, and broader voice library give it a narrow developer advantage.
Both tools use closed model weights and neither supports self-hosted or on-premises deployment. Amazon Polly is closed weights, as is Google Cloud TTS, and neither product can run on your own hardware. This makes the use case impossible for both, so a tie is the only honest verdict.
For voice agents, two practical factors stand out. First, Google supports 1,000 requests per minute default concurrency versus Polly's 80 concurrent streams, meaning Google handles bursty call center traffic far better. Second, Google accepts 5,000 characters per request versus Polly's 3,000, reducing the need to split longer agent utterances mid-stream. Both tools lack a real-time websocket API and both support streaming output, so those factors cancel out. The concurrency gap is the decisive edge for production voice agent deployments.
Common questions
How much does Google Cloud Text-to-Speech cost vs Amazon Polly for high-quality voices?+−
Both services charge identical rates for their flagship models at 30 dollars per 1M characters, and both match again at 4 dollars per 1M characters for fast or standard models. Pricing is usage-based for both, so you only pay for what you consume.
Which service has a bigger free tier, Google Cloud TTS or Amazon Polly?+−
Amazon Polly offers 5M characters per month on its free tier for standard voices. Google Cloud Text-to-Speech offers 4M characters per month free for Standard and WaveNet voices. Both allow commercial use on the free tier.
Does Google Cloud TTS or Amazon Polly support voice cloning?+−
Google Cloud Text-to-Speech supports instant voice cloning. Amazon Polly does not offer instant voice cloning but does support professional voice cloning. Neither service offers open model weights.
Which TTS service supports more languages and voices?+−
Google Cloud Text-to-Speech supports 75 languages and offers 380 voices, while Amazon Polly supports 40 languages and variants with 100 voices. Google Cloud therefore has a significantly larger voice and language library.
Do Amazon Polly or Google Cloud TTS support real-time WebSocket streaming?+−
Neither Amazon Polly nor Google Cloud Text-to-Speech offers a real-time WebSocket API. Both services support streaming audio output, but not via WebSocket connections.
What is the maximum text input length per request for each service?+−
Google Cloud Text-to-Speech supports up to 5,000 characters per request, while Amazon Polly supports up to 3,000 characters per request. If you need to synthesize longer texts in a single call, Google Cloud offers the higher limit.
Are Google Cloud TTS and Amazon Polly HIPAA compliant?+−
Both services offer HIPAA BAA availability and are SOC 2 Type II certified, making them suitable for healthcare and other regulated use cases.
What default concurrency limits should I expect with each service?+−
Google Cloud Text-to-Speech defaults to 1,000 requests per minute per project, while Amazon Polly defaults to 80 concurrent requests on its standard plan. Because these metrics differ in kind, direct comparison is difficult, but Google Cloud's default limit is substantially higher for high-throughput workloads.
Related comparisons
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When neither is right: browse all Text-to-speech APIs platforms →
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