Microsoft Azure AI Speech review

Azure AI Speech is Microsoft's text to speech service, and like Google's it is aimed at developers and enterprises. Microsoft documents standard neural voices, higher-quality HD voices and Azure OpenAI neural voices, along with custom voice options for building a voice unique to a product or brand. SSML gives fine control over pitch, pauses, pronunciation and speaking rate, though Microsoft notes that some HD and personal voices do not support every tag. For people who do not code, the Audio Content Creation tool in Speech Studio offers a no-code way to produce narration, which makes Azure more usable for training teams than most raw APIs. The free F0 tier includes 0.5 million neural characters a month. We could not confirm USD per-character rates from the pricing page as fetched, since the figures load dynamically, so check the calculator for your region. For organizations already on Azure, it keeps voice work inside existing security and billing.

Who it is for

Enterprises on Azure that want branded custom voices and compliance within Microsoft's cloud.

Price

Free tier with 0.5 million neural characters per month; see vendor pricing (USD check pending).

US price check pending. See the vendor pricing page.

Key features

• Standard neural voices plus HD and Azure OpenAI neural voices
• Custom voice for a voice unique to your brand
• SSML for pitch, pauses, pronunciation and speaking rate
• Audio Content Creation tool in Speech Studio for no-code work
• Batch synthesis API for files longer than 10 minutes

Strengths and weaknesses

• Strength: Free F0 tier includes 0.5 million neural characters a month
• Strength: Fits teams already on Azure
• Strength: Custom voice options for brand identity
• Weakness: Pricing page prices load dynamically, so check your region's rates
• Weakness: Some HD and personal voices do not support all SSML tags
• Weakness: Setup requires an Azure subscription and resource

Key facts

• Free tier: 0.5 million neural characters per month
• No-code tool: Audio Content Creation in Speech Studio
• Custom voices: Yes, professional and personal voice

Where it ranks

Microsoft Azure AI Speech is No. 8 in our Best AI Voice Generators verdict.