Speech Recognition
Improve your model’s ability to recognize spoken words with accurately labeled audio data.
Audio & Speech AI
Audio Annotation Services
High-accuracy speech transcription, speaker diarization, and acoustic event tagging across 55+ languages.
RUN FREE PILOTFeatured Capability
Recording Active
00:0.055+ Languages Supported98.5% Accuracy
Speech AI Pipeline
Multi-Speaker Diarization & Acoustic Tagging
Trusted by leading brands
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Your data problem
has a human solution.
Speech AI Teams
Your ASR model is only as good as the transcripts it's trained on — we deliver phoneme-level precision across accents and dialectsWe handle studio recordings to noisy field audio, multilingual code-switching, and specialized domain vocabulary
Contact Center Analytics
Call center audio needs speaker-level diarization and sentiment tagging to build meaningful customer experience AIWe label intent, emotion, and conversation flow — the exact signals your NLU models need to detect escalation and satisfaction
Podcast & Media Platforms
Searchable, timestamped transcripts at scale unlock content discovery and compliance for media companiesWe transcribe and annotate speaker turns, topic boundaries, and named entities across any audio format
Accessibility Tech
Accurate captions and audio descriptions aren't cosmetic — they're legal requirements and human necessitiesWe produce broadcast-grade closed captions and descriptive audio annotations for your accessibility pipeline
OUR ANNOTATION SERVICES FOR SPEECH & AUDIO DATA
We provide high-precision annotation for all major speech recognition, audio classification, and acoustic intelligence tasks across 55+ languages. Our global team can expertly deliver the following audio annotation services:
Speech Recognition — Voice Assistants
Wake-word detection, acoustic trigger validation, and multilingual natural voice assistant training datasets.
Voice Assistants
AUTO
A Futureproofed Pipeline
We exist for a future where high-performance speech recognition and acoustic AI models are built on pristine, expertly annotated audio data running perfectly within your infrastructure.
Step 1
Free Pilot
Step 2
QA Review
Step 3
Proposal
Step 4
Start Labeling
Step 5
Delivery
Estimate Your Costs for ML projects
1 Pick application field
NLP
2 Select annotation method
Entities to label
3 Specify how many objects to label
Amount
entities
SmallMediumLarge
4 Check the approximate total cost
Estimated Cost:$0 /total
5 Run free pilot
Why Projects Choose Engai for Audio Annotation
98%
Transcription Accuracy
5x
Faster Delivery
20%
Cost Optimization
Train Better Voice Models
Clean, timestamp-accurate audio annotations feed your ASR, TTS, and LLM voice pipelines with ground truth clarity.
Multi-Tier QA Assurance
Every transcript passes native speaker verification, timestamp boundary checks, and automated lexicon validation.
Scale Without Compromise
From small test sets to hundreds of audio hours in 55+ languages, scale effortlessly with benchmark accuracy.
Safe and secure
Your trust is our foundation. Engai is designed with a deep commitment to data privacy and security. Visit our trust page and security center to learn more.
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27001Start Free Piloting your ML project !
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Discover how Engai's Data Pipeline and AI Infrastructure platform can make your organization AI-ready:
Automatically discover and map all datasets with contextualized inventory
Effortlessly manage ML lifecycle and address governance gaps
Drastically reduce deployment time by mitigating edge-case risks
Immediately detect and respond to model drift to minimize threat impact
Proactively apply zero-trust protection mechanisms for proprietary data
Live Infrastructure Telemetry
1.2BData Points
189Models
24Pipelines
3Alerts
TypeOriginOwnerStatus
Vision ModelGitHubDave DigsterHealthy
DatasetAWS S3Emily ThompsonSyncing
DeploymentGCPRobert BrownActive
Zero-Trust Dataset Confidentiality
Your requirements and proprietary sample assets are encrypted in transit and never used for public model training.
Support Center
Frequently Asked Questions
We accept all standard audio formats including WAV, MP3, FLAC, M4A, OGG, AAC, and AIFF. We also support video formats (MP4, MKV, MOV) where audio needs to be extracted, transcribed, and aligned with visual timestamps.