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Gradium Speech-to-Text Review

Low-latency STT for voice agents

Among the 43 speech-to-text tools we track, Gradium Speech-to-Text has the 40th-widest language coverage.

From $13/mo

Facts verified Jul 20, 2026Try Gradium Speech-to-Text

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What we know about Gradium Speech-to-Text

This is our verified profile of Gradium Speech-to-Text, a speech-to-text apis platform - low-latency STT for voice agents. Every fact about Gradium Speech-to-Text below carries the source it came from and the day we checked it.

On pricing, Gradium Speech-to-Text starts at $13 per month for its entry tier. That is the sticker rate: real production cost usually runs higher once you add a language model, a voice provider, and telephony minutes.

On capabilities, Gradium Speech-to-Text covers speech translation and websocket streaming api, and does not offer language auto-detection, word-level timestamps, and custom vocabulary / keyterm boosting. Each of those is verified against Gradium Speech-to-Text's own docs or dashboard, not marketing copy.

Placed against the 43 speech-to-text tools we track, Gradium Speech-to-Text's strongest showing is the 40th-widest language coverage - a spread worth weighing against your own priorities.

In total we track 23 verified facts for Gradium Speech-to-Text today, each linking the primary source it came from so you can check our work - and vendor claims we have not measured ourselves are labeled as such on the Gradium Speech-to-Text fact sheet below.

Reviewed by vsref Editorialfacts verified Jul 20, 2026Methodology →

Fact sheet

Pricing
Pricing facts
Pricing modelhybridJul 20
Cheapest paid plan$13Jul 20
Free tier quota45k credits (~4 hrs STT)Jul 20
Published volume discountsYes - add-on credits cheaper at higher tiersJul 20
Concurrency on base planFree 3; XS/S 20 sessionsJul 20
Capabilities
Capabilities facts
WER (third-party benchmark)8.38 % WERJul 20
Streaming latency (vendor-claimed)~300 msJul 20
Languages supported5Jul 20
Language auto-detection✗ NoJul 20
Speaker diarization✗ Not availableJul 20
PII redaction✗ Not availableJul 20
Word-level timestamps✗ NoJul 20
Custom vocabulary / keyterm boosting✗ NoJul 20
Entity detection✗ Not offered.Jul 20
Sentiment analysis✗ Not offered.Jul 20
Summarization endpoint✗ Not offered.Jul 20
Speech translation✓ YesJul 20
Priced audio-intelligence add-onsNone (semantic VAD, translation only)Jul 20
Compliance & trust
Compliance & trust facts
Self-host / on-prem option✗ NoJul 20
Build experience
Build experience facts
Official SDKsPython (pip install gradium)Jul 20
Max file size / duration300 s per session (5 min)Jul 20
Supported audio formatsWAV, PCM, Opus, mu-law, A-lawJul 20
Websocket streaming API✓ YesJul 20

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