Deepgramvs
Cartesia
Cartesia: Cartesia offers comparable real-time speech and voice agent models.
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Voice AI API platform for speech-to-text, text-to-speech, and voice agents
Overview
Deepgram provides enterprise-grade voice AI infrastructure with unified APIs for speech-to-text, text-to-speech, and voice agent orchestration, enabling developers to build real-time conversational AI applications. Its Flux models handle conversation-aware turn-taking and interruptions, and the platform supports real-time or batch processing with cloud or self-hosted deployment options.
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Cross-shopped
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
Cartesia: Cartesia offers comparable real-time speech and voice agent models.
Resemble AI: Resemble AI provides voice cloning and text-to-speech as an alternative for conversational voice generation.
Pricing
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Pay As You Go
On request
Growth
On request
Enterprise
On request
Capabilities
Flux speech-to-text
Conversation-aware STT that handles turn-taking and interruptions in real time.
Flux text-to-speech
TTS designed for live conversations with tone and expression continuity.
Voice Agent API
Combines STT, TTS, and LLM orchestration into a unified voice agent API.
Real-time and batch processing
Supports both streaming and pre-recorded audio processing modes.
Self-hosted deployment
Offers cloud or self-hosted deployment for data control.
Audio intelligence
Provides token-based summarization and entity detection on audio.
Answered, with sources
Each answer names the page it came from, so you can check it rather than take our word for it.
Deepgram uses usage-based pricing starting with $200 in free credit, pay-as-you-go rates per minute or per character, a Growth plan with annual pre-paid credits requiring a $4K/year minimum, and custom Enterprise pricing.
SourceNew users get $200 of free credit with no credit card required, which can be applied to speech-to-text, text-to-speech, or voice agent usage before any payment is needed.
SourceUsage is metered per minute of audio for speech-to-text and voice agent calls, and per 1,000 characters for text-to-speech, with add-ons like redaction and entity detection billed separately per minute.
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