Resemble AI vs Speechmatics

An asynchronous audio processing API that edits spoken content by AI inpainting of only the changed segments, and enhances recordings with noise removal, loudness normalization and studio processing.

Deepfake detection across audio, image and video, billed per second and per image, with intelligence on each detection result and identity and watermarking tools sold alongside it for fraud prevention.

A voice biometric API that enrolls speaker profiles from short audio samples and returns per-speaker match distance scores for identity verification and watchlist screening.

An explainability layer that returns human-readable forensic explanations, speaker profiling, fraud classification and transcription alongside Resemble Detect's deepfake verdicts.

An API-first interpretation layer that sits on top of Resemble's detection stack, converting deepfake-detection results into fraud/impersonation judgments and recommended responses.

A voice conversion API that re-voices a recorded human performance into one or many target voices while preserving the original pacing, inflection and emotional delivery, with prompt-guided accent and tone steering.

A streaming text-to-speech API offering sub-200ms WebSocket synthesis, zero-shot voice cloning from about five seconds of audio, custom pronunciation locking and paralinguistic tags.

A voice cloning and voice design service offering rapid clones from ten seconds of audio, professional clones trained from longer recordings with consent workflows, and text-prompted generation of new voice candidates.

Embeds imperceptible, machine-readable watermarks into audio, video, images and text at the point of creation (built on the PerTh Multimodal model) to establish provenance, ownership and AI-generation status, supporting C2PA and SynthID verification and EU AI Act Article 50 compliance.

Speechmatics' automatic speech recognition API transcribes audio into text in 55+ languages in either real-time streaming or batch mode, with speaker diarization, custom dictionary, translation and summarization options.

Generates a short summary of an audio file in the same API call that transcribes it, as paragraphs or bullets. It is a Speech Intelligence feature enabled by adding a config block to a batch Speech to Text job, not a product bought on its own.

Speechmatics' text-to-speech API generates streaming synthetic English speech from text with sub-150ms latency using four named voices (Sarah, Theo, Megan, Jack), aimed at real-time voice agent use.

Translates a transcript into other languages in the same API call that produces it, for files or live audio. It is a feature switched on inside a Speech to Text request rather than a separate product; the docs file it under Speech to Text and return the translations alongside the transcript.

Speechmatics' voice agent offering provides a real-time conversational speech API - including the Flow WebSocket endpoint that chains speech-to-text, an LLM, text-to-speech and function calling - plus a Python Voice SDK for turn detection and speaker management, and integrations with Vapi, LiveKit and Pipecat.