Soniox review

Soniox lists input pricing from $1.50 and output pricing from $3.50. Both figures sit well above the €0.07 and €0.23 medians across the brands compared here, so a transcription budget needs more headroom than a text-only one.

The stated certifications are SOC 2 Type 2, ISO/IEC 27001:2022 and HIPAA. That spans a security audit, an information security standard and two data protection regimes, which is usually enough to answer the compliance questions a first purchase raises.

Soniox offers stt rt v5 and stt async v5. The choice between them is about latency rather than specialisation, so teams running live captions and teams handling recorded files can each pick the model that matches the job.

Soniox lists a largest context window of 8,000, the smallest maximum among the brands compared on this measure. Long recordings will not fit in a single request, so large files need splitting before they can be transcribed in one call.

Support runs on email, community and help centre. Those channels are email, a help centre and a community, and no phone line appears among them, so teams should plan around written replies rather than a live call.

The contracting entity is Soniox Inc., and its headquarters country is the US. For teams that onboard vendors through procurement, that gives a single named counterparty to place alongside the certifications on the security questionnaire.

Soniox runs its own speech-to-text models rather than acting as a multi-vendor gateway. Its catalogue is limited to stt rt v5 and stt async v5, so there is no text model and no second provider to route to. Buyers after a broad catalogue should look at Azure AI Foundry or Supascale AI.