Caption.IM

Caption.IM is a privacy-first AI captioning assistant designed exclusively for macOS. It transforms any audio on your Mac into real-time captions, instant translations, recordings, and structured meeting notes, all powered by local AI processing directly on your device. Unlike browser extensions or meeting bots that require integration with specific platforms, Caption.IM captures system audio directly, making it compatible with virtually any application: Zoom, Google Meet, Microsoft Teams, YouTube, online courses, podcasts, livestreams, webinars, and recorded videos. The product is built with a strong emphasis on privacy and accessibility. All speech recognition and processing can run locally on your device, ensuring that your conversations never leave your Mac. This approach eliminates the need for third-party servers to handle your sensitive audio data. Caption.IM is optimized for Apple Silicon M1, M2, M3, and later chips, delivering ultra-fast speech recognition with minimal latency and efficient power usage. It serves a wide audience including remote workers, online learners, multilingual teams, accessibility advocates, content creators, researchers, and students who need to turn conversations into searchable, translatable knowledge instantly.

Real-Time Transcription

Caption.IM generates live captions for meetings, videos, podcasts, and calls directly on your Mac. The transcription engine processes audio from any source with high accuracy and low latency, providing you with immediate text output that keeps pace with spoken content. This feature is essential for following fast-paced discussions or reviewing recorded material.

Instant Translation

The application supports real-time translated subtitles, allowing you to understand content in multiple languages as it is spoken. This feature is invaluable for multilingual teams, international webinars, and foreign language learning. Caption.IM translates on the fly, ensuring you never miss important information due to language barriers.

Floating Subtitle Window

Caption.IM provides an elegant transparent overlay that works seamlessly with macOS. This floating window displays captions in a non-intrusive manner, allowing you to read subtitles while focusing on your primary task. The overlay is customizable and integrates smoothly with your existing workflow, whether you are in a video call, watching a video, or attending an online course.

AI Meeting Summaries

After conversations, Caption.IM automatically generates structured summaries and key insights. This feature transforms long discussions into clear summaries, key points, action items, and even mind maps. It saves you time by eliminating the need to manually review recordings or take extensive notes, making post-meeting analysis efficient and organized.

Remote Meetings and Video Conferencing

Professionals participating in remote meetings on platforms like Zoom, Google Meet, or Microsoft Teams can use Caption.IM to generate live subtitles and AI summaries. This ensures that all participants, including those with hearing impairments or non-native speakers, can follow the conversation. The automatic summary generation helps capture action items and key decisions without manual note-taking.

Online Learning and Education

Students and educators can benefit from Caption.IM while accessing online courses, webinars, or educational videos. The real-time captions improve comprehension and retention, especially for complex subjects or fast-paced lectures. The translation feature helps international students understand content in their preferred language, while the recording capability allows for later review and study.

Multilingual Team Collaboration

Teams working across different languages can use Caption.IM to bridge communication gaps. During international calls or meetings, the instant translation feature provides real-time subtitles in each participant's language. This reduces misunderstandings and enhances collaboration, making it easier for global teams to work together effectively on projects.

Content Creation and Research

Content creators, researchers, and journalists can use Caption.IM to transcribe interviews, podcasts, and recorded videos. The tool provides accurate text output that can be used for creating show notes, captions for social media, or research documentation. The ability to generate structured summaries and key points helps in quickly extracting valuable information from long audio files.

How does Caption.IM ensure privacy?

Caption.IM is built with a privacy-first architecture. All speech recognition and processing can run locally on your Mac using local AI and Local LLMs. Your audio data is never sent to external servers for processing, meaning your conversations and sensitive information remain on your device. No bots join your meetings, and there is no browser dependency or complicated setup required.

Which applications are compatible with Caption.IM?

Caption.IM works with virtually any application on your Mac that produces audio. This includes video conferencing tools like Zoom, Google Meet, and Microsoft Teams, as well as media players for YouTube, podcasts, livestreams, webinars, and recorded videos. Because it captures system audio directly, it does not require specific integrations or browser extensions.

What are the system requirements for Caption.IM?

Caption.IM is designed for macOS and requires macOS 15.6 or later. It is optimized for Apple Silicon chips M1, M2, M3, and later models to deliver ultra-fast speech recognition with minimal latency and efficient power usage. The application is 18.1 MB in size and is available in English.

Does Caption.IM offer a free trial or subscription?

Caption.IM is available as a free download with in-app purchases. The application includes optional subscriptions that automatically renew unless canceled at least 24 hours before the end of the current billing period. For specific pricing details and subscription plans, please refer to the app's purchase options and the developer's privacy policy and terms of use.