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Soniox vs Deepgram pricing

Compare real-time STT costs from Soniox and Deepgram across per-minute, hourly, and monthly usage. The comparison also covers included speech features and paid add-ons.

Pricing calculator

Compare Soniox and Deepgram STT cost

Adjust monthly audio volume to see how usage changes the estimated real-time STT cost on each side.

1,000 hours of audio / month

1025501002505001k2.5k5k10k100k

Pricing assumptions

Based on public pay-as-you-go pricing. Enterprise discounts and committed-use contracts may differ. Some providers charge separately for certain features. The calculator uses the public price for the provider configuration that most closely matches Soniox.

How much does Deepgram STT cost?

Deepgram bills Nova-3 streaming by audio duration, per minute. The compared Deepgram price includes Keyterm Prompting and Speaker Diarization because Soniox includes equivalent custom context and speaker diarization in its base rate.

Deepgram lists Nova-3 Multilingual Streaming at $0.0092 per minute of streaming audio before add-ons. With Keyterm Prompting and Speaker Diarization, that corresponds to approximately $0.75 per hour. For a direct comparison with Soniox:

Soniox

stt-rt-v5, updated June 2026

$0.12/hr

$0.002 per minute

Deepgram

Nova-3 Multilingual Streaming, updated September 2026

$0.75/hr

$0.0125 per minute

Effective cost is driven by audio minutes plus which Deepgram add-ons are enabled.

Deepgram cost per minute, hour, and month

Deepgram lists $0.0092 per minute of streaming audio for Nova-3 Multilingual streaming. Keyterm Prompting adds approximately $0.0013 per minute or $0.08 per hour, and Speaker Diarization adds approximately $0.002 per minute or $0.12 per hour, compared with $0.002 per minute for Soniox.

At the compared rate of $0.0125 per minute:

Sonioxstt-rt-v5DeepgramNova-3 Multilingual Streaming
Cost per minute$0.002$0.0125
Cost per hour$0.12$0.75
Cost per 100 hours$12$75
Cost per month at 1,000 hours$120$750

Deepgram bills streaming STT by audio duration, so there is no fixed monthly API price in this comparison. Monthly cost depends on the amount of audio processed and the add-ons enabled.

At 1,000 hours per month, Soniox costs $120, while the compared Deepgram rate costs $750.

Monthly real-time STT cost at 1,000 hours of audio

Soniox

stt-rt-v5

$120

Deepgram

Nova-3 Multilingual Streaming

$750
Difference$630/month

This comparison covers voice agents, live captions, conversational AI, and other real-time STT workloads.

Soniox vs Deepgram STT

The comparison covers a single multilingual model, language hints, language identification, speaker diarization, customization, timestamps, confidence scores, real-time latency configuration, endpoint detection, and manual finalization.

Sonioxstt-rt-v5Deepgramnova-3
Single multilingual model
Language hints
Language identification
Speaker diarization
Customization
Timestamps
Confidence scores
Real-time latency config
Endpoint detection
Manual finalization
SupportedPartialNot supported

Soniox also supports speech translation in the same real-time API call at no extra cost. Speaker diarization, language identification, smart formatting, and custom context are included in its hourly STT rate.

At 1,000 hours per month, the current public pricing represents a $630 monthly difference between the two services.

Deepgram STT pricing FAQ

How much does Deepgram cost?
Deepgram Nova-3 streaming is listed at $0.0092 per minute of streaming audio before add-ons. For this comparison, Keyterm Prompting and Speaker Diarization are included, giving a compared rate of approximately $0.75 per hour.
What is Deepgram speech to text pricing?
Deepgram speech-to-text pricing for Nova-3 streaming is based on audio duration, billed per minute. The compared rate includes Keyterm Prompting and Speaker Diarization.
What is Deepgram pricing per minute?
Deepgram pricing per minute starts with the published Nova-3 Multilingual streaming rate of $0.0092 per minute of streaming audio. The like-for-like comparison also includes approximately $0.0013 per minute for Keyterm Prompting and $0.002 per minute for Speaker Diarization.
What is the Deepgram cost per minute?
The compared Deepgram cost per minute is $0.0125, including both add-ons. Soniox real-time speech-to-text is $0.002 per minute.
What is the Deepgram cost per hour?
The compared Deepgram cost per hour is approximately $0.75, including Keyterm Prompting and Speaker Diarization. The base Nova-3 rate before add-ons corresponds to approximately $0.55 per hour.
How much does Deepgram cost per month?
Deepgram streaming STT is billed by audio duration rather than as a fixed monthly API price. At 1,000 hours of monthly audio, the compared cost is $750.
What is Deepgram API pricing for real time transcription?
Deepgram API pricing for real time transcription is based on the duration of streaming audio. Nova-3 streaming is billed per minute, with Keyterm Prompting and Speaker Diarization priced separately.
What is Deepgram Nova-3 pricing?
Deepgram Nova-3 pricing for streaming starts with $0.0092 per minute of streaming audio before add-ons. This page compares Nova-3 Multilingual Streaming and does not compare Nova-3 Multilingual Batch.
What is Deepgram diarization pricing?
Deepgram Speaker Diarization is an add-on to the Nova-3 streaming rate. It costs approximately $0.002 per minute, or $0.12 per hour.
Does Deepgram charge extra for keyterm prompting?
Yes. Keyterm Prompting is a paid add-on to the Nova-3 streaming base rate. It costs approximately $0.0013 per minute, or $0.08 per hour.
Is Deepgram Nova-3 streaming the same price as batch?
No. Deepgram offers Nova-3 Multilingual Batch for async transcription at a separate, lower rate. This comparison covers streaming only.
Does Deepgram Nova-3 support language identification?
No. Nova-3 does not support automatic language identification or language hints. Soniox includes language identification in its base STT rate.
How does Deepgram STT pricing compare with Soniox?
The compared Deepgram rate is $0.75 per hour with Keyterm Prompting and Speaker Diarization included for like-for-like comparison. Soniox is $0.12 per hour, with speaker diarization and custom context included.
Is this Deepgram pricing up to date?
Prices can change. These figures use Deepgram public list prices checked in September 2026. Verify current pricing before budgeting.

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