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Microsoft Azure AI Speech vs. OpenAI Text-to-Speech

The best way to compare Microsoft Azure AI Speech vs. OpenAI Text-to-Speech: audio samples, features, plans, pricing, and more.

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Live Demo

Try our text-to-speech API. Click a button to generate random text:

Non-Fiction
Fiction
News
Blog
Conversation
0/250
Voice
Format
Normal
Speed
Filesize
0 kb
Text to speech API - Microsoft Azure AI Speech

Microsoft Azure AI Speech

Enables your applications, tools, or devices to convert text into human-like synthesized speech.
Text to speech API - OpenAI Text-to-Speech

OpenAI Text-to-Speech

Convert text into lifelike spoken audio using one of the six built-in voices.

Voice Quality

Microsoft Azure AI Speech Samples

Mean Opinion Score
Fiction
3.69
Non-Fiction
3.13
Conversation
3.18

OpenAI Text-to-Speech Samples

Mean Opinion Score
Fiction
N/A
Non-Fiction
N/A
Conversation
N/A
Mean Opinion Score (MOS) is a numerical measure that represents the perceived quality of audio samples, commonly used in evaluating text-to-speech systems. The score ranges from 1 to 5, with 1 indicating poor quality and 5 signifying excellent quality. These scores are derived from comprehensive, professionally-conducted evaluations, and are anonymized to ensure unbiased results.

Features

Microsoft Azure AI Speech Features

Voice Cloning
Multi-lingual
Per-word Timestamps
Pitch Control
Speed Control
Phone Formats (e.g. pcm_mulaw)

OpenAI Text-to-Speech Features

Voice Cloning
Multi-lingual
Per-word Timestamps
Pitch Control
Speed Control
Phone Formats (e.g. pcm_mulaw)

Features - Conclusion

  • Microsoft Azure AI Speech offers a more feature-rich service compared to OpenAI Text-to-Speech, including voice cloning, per-word timestamps, pitch and speed control, and support for phone formats.
  • OpenAI's Text-to-Speech, while supporting multiple languages, lacks these advanced features, making Azure's offering more versatile for developers seeking detailed customization and control over the speech synthesis process.
  • This makes Microsoft Azure AI Speech a more suitable option for applications requiring a high degree of personalization and functionality in text-to-speech services.

Pricing & Plans

Microsoft Azure AI Speech Pricing

Free
$0/mo
5 hours of audio (~225K chars)
Pay As You Go
$15per
1M characters

OpenAI Text-to-Speech Pricing

Pay As You Go
$15per
1M characters
Optimized for speed
Pay As You Go (TTS HD)
$30per
1M characters
Optimized for quality

Pricing & Plans - Conclusion

  • Microsoft Azure AI Speech offers a competitive edge with its free tier, allowing users to access up to 225,000 characters per month at no cost, a benefit not provided by OpenAI Text-to-Speech.
  • For high-volume needs, both services present identical pricing structures in their pay-as-you-go plans, making them equally cost-effective for users exceeding the free tier limits of Microsoft Azure AI Speech.
  • Therefore, for those with minimal usage requirements, Microsoft Azure AI Speech stands out as the more economical choice, while both services are on par for users with more extensive needs.

Compare Alternatives

Microsoft Azure AI Speech Alternatives

Microsoft Azure AI Speech vs. Unreal Speech
Microsoft Azure AI Speech vs. Amazon Polly
Microsoft Azure AI Speech vs. ElevenLabs
Microsoft Azure AI Speech vs. Play.ht
Microsoft Azure AI Speech vs. Google Cloud Text-to-Speech
Microsoft Azure AI Speech vs. Murf API
Microsoft Azure AI Speech vs. Neets.ai
Microsoft Azure AI Speech vs. IBM Watson
Microsoft Azure AI Speech vs. Resemble.AI
Microsoft Azure AI Speech vs. LOVO AI
Microsoft Azure AI Speech vs. Deepgram Aura

OpenAI Text-to-Speech Alternatives

OpenAI Text-to-Speech vs. Unreal Speech
OpenAI Text-to-Speech vs. Amazon Polly
OpenAI Text-to-Speech vs. ElevenLabs
OpenAI Text-to-Speech vs. Play.ht
OpenAI Text-to-Speech vs. Google Cloud Text-to-Speech
OpenAI Text-to-Speech vs. Murf API
OpenAI Text-to-Speech vs. Neets.ai
OpenAI Text-to-Speech vs. IBM Watson
OpenAI Text-to-Speech vs. Resemble.AI
OpenAI Text-to-Speech vs. LOVO AI
OpenAI Text-to-Speech vs. Deepgram Aura

Summary

  • Microsoft Azure AI Speech emerges as a more comprehensive and versatile text-to-speech service compared to OpenAI Text-to-Speech, offering superior features such as voice cloning, pitch and speed control, and a free usage tier.
  • While both services offer competitive pricing for high-volume needs, Azure's additional functionalities and better voice quality scores make it a more attractive option for developers seeking detailed customization and control.
  • Overall, Microsoft Azure AI Speech stands out for its blend of affordability, advanced features, and higher user satisfaction in voice quality.

Looking for a better alternative to Microsoft Azure AI Speech & OpenAI Text-to-Speech?

Try Unreal Speech! You get 250,000 free characters every month.

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