AssemblyAI Guardrails
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.
Find alternatives to AssemblyAI Guardrails
What it does
- Guardrails and safety
- Data security
Features 5
- PII Text RedactionIdentifies and removes personally identifiable information from the transcript before it is returned.
- PII Audio RedactionReplaces personally identifiable information in audio files with a beep for compliance.
- Profanity FilteringIdentifies and redacts profane or sensitive terms to keep speech-to-text output clean.
- Speech ThresholdTranscribes only files that contain a minimum percentage of spoken audio.
- Start & End of TranscriptLimits transcription to the sections of the file that contain speech.
Sources
- Pricing
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Per audio hour on top of the transcription rate: Profanity Filtering $0.01, PII Audio Redaction $0.05, PII Text Redaction $0.08 (pre-recorded; $0.12 on the realtime models), Content Moderation $0.15. The one-time new-account credit covers Guardrails and is not a recurring free tier.
- Description
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Official documentation · 9 Oct 2026
"Profanity filtering, content moderation, and PII redaction at the text and audio level. One API, compliant by default."
- What it does
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Official documentation · 9 Oct 2026
Content moderation and profanity filtering (safety); redaction of personal data (data security).
- Sold within
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Official documentation · 9 Oct 2026
"Enable Guardrails features via options in your transcription request. Each feature can be toggled independently in the API configuration — no separate pipeline required." Pricing notes for the pre-recorded models: "All four guardrails are available on Universal-3.5 Pro and Universal-2." Also: "Select Guardrails features are available with Realtime Speech-to-Text API for real-time safety filtering." All four are sold on the pre-recorded API.
- Name
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Official documentation · 9 Oct 2026
Page heading: "Guardrails" (the product menu says "Guardrails and Safety").
- URL
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Official documentation · 9 Oct 2026
The product's own page.
- Deployment
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Official documentation · 9 Oct 2026
Hosted API.
- Interfaces
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Official documentation · 9 Oct 2026
Set through the transcription request in the API or the official Python and JavaScript SDKs.
- Modalities
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Official documentation · 12 Oct 2026
Page: 'Replace personally identifiable information — such as social security numbers, dates of birth — from the audio files with a'.
- Intended for
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Official documentation · 9 Oct 2026
An API for developers.
Also from AssemblyAI
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AssemblyAI Pre-recorded Speech-to-Text API API service
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.
-
AssemblyAI Realtime Speech-to-Text API API service
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.
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AssemblyAI Voice Agent API API service
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.
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AssemblyAI Speech Understanding API API service
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.
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AssemblyAI LLM Gateway API service
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.
-
Sync Speech-to-Text API API service
Returns a transcript of a short audio clip in a synchronous API response.
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Dictation API API service
Converts spoken audio into text with a cleanup pass and an accompanying verbatim transcript.
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Blurt Application
Converts speech into text wherever the user is typing.
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