Speech Recognition Library AI Speech

\ Works offline! /

Real-time speech recognition
for every platform

Add ultra-accurate speech recognition to your service or product, powered by OpenAI's "Whisper" model. Works fully offline, so you can use it safely even in highly secure environments.

WER 7.1% Japanese recognition accuracy Whisper Medium

30-day free demo app download

Try AI Speech

Free individual consultation available

※Word Error Rate

High-accuracy speech recognition powered by OpenAI's "Whisper"

Integrating the AI model from OpenAI — the company behind ChatGPT — enables highly accurate speech recognition.
Beyond transcription, it dramatically reduces the time and effort needed for post-editing, boosting productivity.

Use Cases

AI speech recognition helps streamline and expand your business across a wide range of scenarios.

Case_01

Creating meeting minutes
takes up staff time every time...

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Automatically generate minutes for confidential meetings — fully offline!

Case_02

Arranging interpreters for
international meetings is always a challenge...

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Cut labor costs with real-time translation. Supports 99 languages.

Case_03

Want to improve productivity
on the manufacturing floor...

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Streamline manufacturing processes with voice commands to machines!

Case_04

Need to take notes
when hands are occupied...

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AI accurately transcribes via voice input — even on smartphones!

Features

Discover the key benefits and rich capabilities of ailia AI Speech.

Ultra-accurate AI-powered speech recognition

Powered by the AI model from OpenAI — the team behind ChatGPT — ailia AI Speech delivers exceptional recognition accuracy. Beyond transcription, it dramatically reduces editing time and boosts overall productivity.

Safe and reliable — works offline

Operates entirely offline without accessing the cloud, keeping even highly sensitive information secure with minimal risk of data leaks. Unaffected by network conditions, it works reliably anywhere. No time limits — perfect for long meetings.

Highly versatile development environment

Provided as a library that can be embedded into existing systems and applications. Available with a C API as well as a Unity plugin, making it straightforward to add speech recognition to Unity-based apps.

Flat-rate pricing — easy to adopt and scale

No server required means no usage-based charges — use it as much as you need. As your user base grows, there are no additional costs.

Practical & Powerful Features

A rich set of features built for real-world use.

99 Languages

Uses a multilingual AI model supporting 99 languages including Japanese, Chinese, and English.

Offline

Runs entirely on-device without cloud access — safe even for highly confidential content.

Translation

Translates 99 languages including Chinese and Japanese into English.

Multi-device

Works on Windows, macOS, iOS, Android, and Linux — not just Windows PCs.

Custom Dictionary

Load a CSV dictionary to replace and correct speech recognition errors.

Speaker Identification

Automatically identifies who is speaking, accurately organizing multi-speaker conversations for meeting records and dialogue logs.

Silence Detection

Automatically detects silent segments and skips unnecessary parts, significantly improving recording and analysis efficiency.

\ Coming Soon /

We will continue to integrate new AI models and add useful features.

Summarization

Punctuation

Voice Command

Numeric Input

Getting Started

Here's how the onboarding and support process works. Feel free to try it out!

Our expert team supports you every step of the way.

From onboarding through development to ongoing support, we're available via email, phone, or online meetings.
With our development and headquarters based in Japan, we provide prompt and thorough follow-up.

Download 30-day Free Demo Book a Free Consultation

FAQ

Answers to frequently asked questions.

What are the system requirements for running AI Speech on a PC or smartphone?

Windows and Linux: Core i7 or higher CPU, 8 GB or more RAM.
macOS: Apple M1 or higher, 8 GB or more RAM.
iOS: A15 chip or higher, 4 GB or more RAM.
Android: Snapdragon 888 or higher, 4 GB or more RAM.

Can I use a GPU?

Yes. Metal is available on macOS and iOS; CUDA is available on Windows and Linux. GPU-accelerated speech recognition is significantly faster than CPU-only processing.

How can I improve speech recognition accuracy?

Microphone quality is critical for accurate speech recognition. If accuracy is insufficient, consider using a lapel microphone or a highly directional microphone.

Support

Documentation and sample programs are available to get you started.

Detailed documentation covering setup and API usage.

Documentation

Sample code demonstrating API usage.

Sample Programs

Ask questions anytime via our community chat.

Support Slack