Dessa

Dessa

Block
+
+

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About

Dessa is Block's speech-to-speech artificial intelligence model for conversational voice research and applications. It takes audio input and produces audio output directly, without converting speech into text as an intermediate step. Trained from scratch on human conversation rather than text, the model supports full-duplex interaction, listening and speaking at the same time, and runs locally on a MacBook Pro with an M4 Max chip or better. It captures conversational cues such as emotion, sarcasm, laughter, pauses, and turn-taking that can be lost in text-based pipelines. Dessa is intended for AI safety researchers and developers studying voice-model behavior, privacy, and real-time interaction. It is a speech model for research and development, not a general-purpose business application or hosted voice-agent platform.

About

MAI-Voice-2-Flash is Microsoft AI’s fast, efficient text-to-speech model for high-volume voice experiences where responsiveness is essential. It produces high-fidelity, natural, and expressive speech while preserving the prosody, acoustic quality, human-like rhythm, intonation, and emotional nuance of MAI-Voice-2. The model is optimized for real-time synthesis and runs twice as fast as MAI-Voice-2, making it suitable for voice agents, assistants, interactive applications, call centers, and IVR systems that must respond without noticeable delay. It supports 15 languages across 18 locales and includes a library of licensed, curated voices that can be used immediately. Developers can control speaking style and emotion through SSML, shaping delivery with expressions such as joy, excitement, empathy, sadness, whispering, or shouting to match different conversational situations and brand experiences.

Platforms Supported

Windows Not Supported
Mac Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

AI safety researchers and developers evaluating or building speech-based conversational AI.

Audience

Teams, creators, and anyone searching for responsive, multilingual, and expressive voice agents for high-volume passenger interactions

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Block
Founded: 2009
United States
block.xyz/dessa

Company Information

Microsoft
Founded: 1975
United States
microsoft.ai

Alternatives

Alternatives

FLUX.2

FLUX.2

Black Forest Labs
Grok Voice 3.0

Grok Voice 3.0

SpaceXSI
MAI-Voice-2

MAI-Voice-2

Microsoft AI
Eleven Realtime

Eleven Realtime

ElevenLabs
MAI-Voice-2.1

MAI-Voice-2.1

Microsoft

Categories

AI Voice Models Supported

Categories

Integrations

Azure Voice Live API Not Supported
Bing Not Supported
GitHub Copilot Not Supported
Microsoft Azure Not Supported
Microsoft Dynamics 365 Not Supported
Microsoft Excel Not Supported
Microsoft Foundry Not Supported
Microsoft OneDrive Not Supported
Microsoft PowerPoint Not Supported

Integrations

Azure Voice Live API Supported
Bing Supported
GitHub Copilot Supported
Microsoft Azure Supported
Microsoft Dynamics 365 Supported
Microsoft Excel Supported
Microsoft Foundry Supported
Microsoft OneDrive Supported
Microsoft PowerPoint Supported
Claim Dessa and update features and information
Claim Dessa and update features and information
Claim MAI-Voice-2-Flash and update features and information
Claim MAI-Voice-2-Flash and update features and information