Best On-Premises Closed Captioning Software of 2025

Google Cloud Speech-to-Text serves as an essential resource for closed captioning solutions, enabling precise transcription of spoken dialogue into written text instantaneously. By transforming audio into captions for video material, it effectively broadens accessibility for a diverse audience, particularly benefiting individuals with hearing disabilities. The platform's capability to recognize a variety of languages and accents guarantees high accuracy in transcripts, even in multilingual settings. Additionally, it can identify different speakers, improving the clarity of captions for interviews, panel discussions, and presentations. New users can take advantage of a $300 credit to explore this closed captioning feature, offering a seamless method to incorporate accessibility into their video projects.

Best-in-Market Speech-to-Text & Voice AI for Enterprises. Speechmatics delivers industry-leading Speech-to-Text and Voice AI for enterprises needing unrivaled accuracy, security, and flexibility. Our enterprise-grade APIs provide real-time and batch transcription with exceptional precision—across the widest range of languages, dialects, and accents. Powered by Foundational Speech Technology, Speechmatics supports mission-critical voice applications in media, contact centers, finance, healthcare, and more. With on-prem, cloud, and hybrid deployment, businesses maintain full control over data security while unlocking voice insights. Trusted by global leaders, Speechmatics is the top choice for best-in-class transcription and voice intelligence. 🔹 Unmatched Accuracy – Superior transcription across languages & accents 🔹 Flexible Deployment – Cloud, on-prem, and hybrid 🔹 Enterprise-Grade Security – Full data control 🔹 Real-Time & Batch Processing – Scalable transcription 🚀 Power your Speech-to-Text and Voice AI with Speechmatics today!

OOONA is an internationally recognized provider of management and production tools in the media localization sector. OOONA is renowned for its cutting-edge software that caters to subtitling and voiceover needs, as well as dubbing, captioning, and dubbing. Its modular, pay-as you-go pricing model allows users to customize solutions to meet their specific requirements. OOONA is trusted by broadcasters, media localizers and a large user base in over 160 countries.

CapMate is an innovative platform designed for the quality control and correction of captions and subtitles, which automatically detects various issues and enables users to make corrections and export the improved captions efficiently. It ensures that your captions or subtitles meet specific standards, including SCC, IMSC, and TTML, while also validating them for popular content delivery services such as Netflix, Amazon Prime, Disney+, and HBO, among others. This tool helps users identify synchronization problems and overlaps between captions and burnt-in text, offering both auto and manual correction options. Furthermore, it quickly highlights offensive or inappropriate language in captions and allows users to replace such words with alternatives of their choosing. CapMate also features an advanced browser-based interface for reviewing and correcting captions, making it easy to validate essential captioning parameters like Duration, Characters per line, Words per minute, and overlaps of successive captions, enabling users to maintain high-quality standards in a time- and cost-effective manner. By integrating these functionalities, CapMate simplifies the entire process of captioning, ensuring that content creators and distributors can focus more on their core activities while relying on effective solutions for caption accuracy.