Custom Speech-to-Text Software That Actually Understands Your Audio

We design and build custom speech-to-text systems with real-time transcription, custom-trained models, and secure integrations.

Generic APIs fail on accents, jargon, and noisy environments. We don't use generic APIs. We build yours.

Custom STT & ASR Software Development Built for Real Audio

Off-the-shelf transcription tools are trained on clean, neutral speech. Your audio isn't clean or neutral; it's medical terminology in a clinic, legal arguments in a deposition room, or customer calls in a contact center.

We build custom speech-to-text systems trained on your real data, tuned to your environment, and deployed where you need them: cloud, hybrid, or on-prem.

Every project is handled by senior engineers who have worked on real-time audio systems for over 20 years. No handoffs to junior staff, no templates. We own the outcome.

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Looking for a specific feature?

We've got you covered with a wide range of features and integrations – whatever you need! Just reach out to us for a custom quote tailored to your requirements.
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project example

TransLinguist

A video conferencing SaaS built for global interpretation services, trusted by the UK’s National Health Service. Supporting 62 languages, it features real-time machine translation, AI subtitles, voice-over, and tools like speaker slowdown indicators and sign language integration. With an estimated $4.2M in annual revenue, TransLinguist delivers 2x ROI in just two years and increases client revenue by up to 1.5x.

How Our Custom STT Development Process Works

We don't start writing code until we understand your audio. Most projects fail at the data and requirements stage, not the engineering stage.

Here's how we avoid that.

By the time you're in production, you have a model tuned to your environment – not a black-box API you rent by the minute.

Have an idea
or need advice?

Contact us, and we'll discuss your project, offer ideas and provide advice. It’s free.

STT Architecture & Technology Stack

We design modular, observable pipelines built to scale from MVP to enterprise volume without a full rebuild.

Core components:

🎧 Ingestion & Audio Preprocessing
WebSocket / HTTP streaming, noise gating, voice activity detection (VAD), multi-channel demux.
🎙️ Acoustic Model
Whisper (fine-tuned), Wav2Vec 2.0, Conformer, or hybrid architectures depending on latency and accuracy requirements.
🧠 Language Model Rescoring
n-gram and neural LM integration for domain vocabulary and contextual correction.
🎤 Speaker Diarization
PyAnnote-based pipeline, customizable to your speaker count and session length.
🔍 Post-Processing
Punctuation restoration, inverse text normalization, PII redaction, custom vocabulary injection.
🚀 Serving Layer
Triton Inference Server, custom FastAPI/gRPC endpoints, horizontal scaling via Kubernetes.
☁️ Deployment Targets
AWS, GCP, Azure, on-premise bare metal, air-gapped environments.
📊 Monitoring
WER drift detection, latency p95/p99 dashboards, cost-per-hour tracking.

Start with an MVP and scale to enterprise-grade systems with millions of concurrent streams. Reach out for free roadmap and SRS →

What Custom STT Software Gets Built For

Real-time audio intelligence is not a single use case; it's a layer that different products need in different ways.

🩺 Medical Transcription & Clinical Documentation
📞 Contact Center Intelligence
⚖️ Legal & Compliance Transcription
🌍 Video Conferencing & Multilingual Interpretation
📚 E-Learning & Accessibility
🖥️ Voice-Enabled Enterprise Applications
📺 Broadcast & Media Monitoring
🎙️ Podcast & Media Production Tooling
🔒 Security & Surveillance Analytics

We Handle Every Kind of Custom Speech Recognition Project

Custom speech-to-text software development for every stage and situation. Secure, scalable, and built by engineers who have been doing this for 20 years.

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From Scratch Development

Have an idea? We’ll turn it into a fully working app – from design and backend to launch and support.

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Upgrades & Improvements

Got a product that needs more speed, stability, or features? We’ll make it stronger and ready to scale.

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Takeovers & Fixes

Struggling with unfinished or broken code? We’ll step in, clean it up, and get your project back on track.

Flexible Pricing for Every Growth Stage

* Pricing is always project-specific and based on your exact requirements. We provide a detailed estimate after a short call — no surprises, ever.
** Optional add-ons: custom vocabulary and jargon packs, accent and dialect fine-tuning, noise reduction pipelines, PII redaction and profanity filtering, sentiment detection, real-time WebSocket streaming API, on-prem/air-gapped deployment, transcription analytics dashboards, audit logs and role-based access, SLA monitoring and retraining pipelines, and more.

Ready for a realistic timeline and cost breakdown tailored to your ARS & STT needs? We offer free SRS and a code audit for existing projects.

Why Clients Choose Us for Speech-to-Text Development

20 Years in Real-Time Tech

Perfecting complex real-time video & audio software since day one – reliable custom solutions that deliver real value.

All Skills Under One Roof

Senior developers, QA, UI/UX designers, analytics – all in-house. We think like product owners, not just coders.

Proven Results & Reliability

Over 600 completed projects, 100% Upwork Success rate, and 400+ honest clients' reviews. Results you can trust.

Your custom speech-to-text development questions, answered.

Custom Speech-to-Text Software Development FAQ

Straight answers from engineers who build these systems.

What is custom speech-to-text software development?

It’s building an ASR (Automatic Speech Recognition) system trained on your specific data, vocabulary, and audio conditions, rather than relying on general third-party APIs. The result is a model that understands your accents, jargon, and acoustic environment, deployed on infrastructure you control.

How accurate can a custom speech recognition model get?

With enough domain-specific data, custom models routinely reach 95-98% word accuracy. Off-the-shelf models often drop to 70-80% on specialized audio; fine-tuned custom models regularly hit 93%+. Accuracy depends on your data quality and volume.

How much does custom speech-to-text development cost?

Projects range from ~$8,000 for a single-domain MVP to $32,000+ for a full enterprise system with multi-language support, diarization, compliance, and on-prem deployment. Costs vary by languages, accuracy requirements, deployment, and available training data. We provide a precise estimate after a free discovery call.

How long does it take to build a custom ASR system?

MVP systems launch in 4-6 weeks. Full enterprise systems take 4-6 months. Using our Agentic Engineering approach – senior engineers working alongside AI agents – we deliver 4-10× faster than conventional timelines.

What training data do I need to provide?

More domain-specific audio improves results, but limited data can be used via transfer learning and augmentation. Rough guide: 10-50 hours for meaningful fine-tuning, 100-500 hours for production-grade accuracy. We’ll audit your data and identify gaps.

Can you deploy on-premise or in a private cloud?

On-premise or private cloud deployment is standard, including air-gapped setups for HIPAA, GDPR, or government/defense compliance.

What happens after the system goes live?

We provide ongoing support: model monitoring, retraining pipelines, and incremental feature updates, so you’re never left with just a container and a goodbye.

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