AssemblyAI vs Soniox
Relationship
Blurt and Smart Scribe both list speech to text; both also serve buyers who need to turn speech into text; scale not recorded for either.
Assembled from the recorded fields for this pair, not hand-checked. The comparison below is read from each company’s own profile.
4 shared capabilities — Across all their products, both list speech to text, summarization, text to speech and 1 more.
Ludbee capability tags · every product each company sellsShared product type — Both ship API service and application.
Ludbee product recordsAligned comparison
Capability overlap
Shared · 4
Not verified for Soniox · 4
Recorded for AssemblyAI. Soniox’s product records say nothing either way — a missing record is not a missing capability.
Soniox has no capability AssemblyAI lacks, among the 4 recorded here.
Products, side by side
Algorithmic pairing — assembled from recorded fields, not hand-checked
AssemblyAI
Application
API service
Safety add-ons for transcription requests: profanity filtering, content moderation and redaction of personal data in the transcript text and in the audio itself, each toggled per request.
OpenAI-compatible API that routes requests to GPT, Claude, Gemini, Qwen and other hosted models with automatic fallbacks, at the providers' own token prices with no markup, beside AssemblyAI's speech APIs.
Speech-to-text API for recorded audio and video files: transcripts in 99 languages with speaker diarization, language detection, word-level timestamps and keyterm prompting, billed per second of audio.
Live transcription API: audio streamed over a WebSocket comes back as text within a few hundred milliseconds, with endpointing for voice agents, sold by the hour of session time and also offered self-hosted.
Add-on models switched on in a transcription request that turn recorded audio into structured output: speaker labels, sentiment, entities, topics, key phrases, summaries, translation and custom formatting, each priced per audio hour.
One connection that runs a production voice agent end to end: speech recognition, a conversational language model, voice generation, turn detection, interruptions and tool calls, at one flat hourly rate.
Converts spoken audio into text with a cleanup pass and an accompanying verbatim transcript.
Returns a transcript of a short audio clip in a synchronous API response.
Soniox
Application
API service
Real-time speech translation API that translates speech one way into a target language, or both ways in a conversation, while people are still speaking, across 60+ languages, for voice agents, live captions and multilingual meetings.
Speech-to-text API (stt-rt-v5) for real-time and file transcription and speech translation, priced by tokens of audio.
Soniox Text-to-Speech API generates audio from text through a REST endpoint.