Line 21

Line 21 delivers real-time AI captions and subtitles for live events, streaming, and digital content. Our hybrid AI-human approach ensures high accuracy with industry-specific terminology, accents, and niche references. The AI Proofreader enhances captions in real time, reducing errors for a more inclusive experience. Designed for event organizers, broadcasters, and language service providers, Line 21 offers scalable, cost-effective captions that integrate seamlessly into workflows. Unlike traditional human captioning or basic ASR, we provide precise, real-time captions that improve accessibility, meet regulations, and expand audience reach. The cloud-based platform eliminates logistical costs and environmental impact by removing the need for in-person captioners.