DubTab: DubTab is a Chrome and Edge browser extension that delivers real-time translated subtitles and optional AI voice dubbing for audio playing in any browser tab, including livestreams and online meetings. spf.io: AI captioning and translation platform for in-person, virtual, and hybrid events, supporting 100+ languages with broad streaming integrations. This comparison weighs them on pricing, features, and everyday workflow fit.
How Hosiqo compares and tests toolsFinal recommendation
Shortlist DubTab when following zoom, google meet or teams meetings in another language with live captions and dubbing matters most, and spf.io when providing multilingual accessibility for webinars streamed via zoom, youtube, or obs matters most. Trial each on a few real meetings before you commit — the better fit usually shows fast.
DubTab is a Chrome and Edge browser extension that delivers real-time translated subtitles and optional AI voice dubbing for audio playing in any browser tab, including livestreams and online meetings.
AI captioning and translation platform for in-person, virtual, and hybrid events, supporting 100+ languages with broad streaming integrations.
DubTab is a browser extension for Chrome and Edge that translates spoken audio in real time as it plays in a browser tab. Rather than requiring file uploads or exports, it listens to the audio of whatever tab is playing and produces live translated subtitles on screen, optional bilingual (original plus translation) captions, and low-latency AI voice dubbing that speaks the translation aloud. The vendor states audio stays in the tab and only text segments are processed, and that translations appear with roughly half-a-second latency suitable for live content. It supports 50+ languages and offers voice selection and volume-ducking controls. Because it works on any site with audio, supported contexts include YouTube, Twitch, Netflix, Udemy, Coursera and Bilibili, as well as meeting and conferencing tools such as Zoom, Google Meet and Microsoft Teams, where it can show what participants are saying in real time. It is aimed at online learners, livestream and international-content viewers, and remote meeting participants who need on-the-fly interpretation and captioning.
Best suited for
spf.io, operated by TheoTech LLC, is an AI-powered captioning and translation platform built for in-person, virtual, and hybrid events. It provides automatic live captions and real-time translation in more than 100 languages, plus AI-generated translated audio in over 70 languages, so multilingual and deaf or hard-of-hearing audiences can follow sessions in their preferred language. Output can be shown on projectors with up to four languages at once, embedded into web and app players, or accessed by attendees on mobile devices through a QR code or URL with both text and audio options. The platform integrates with common meeting and streaming tools including Zoom, Microsoft Teams, Google Meet, YouTube, Facebook Live, OBS, StreamYard, vMix, and Twitch. Beyond fully automatic captions, spf.io supports supervised and edited captioning for quality control, bidirectional translation, manuscript-based delivery, and interpreter subtitling. It offers customization such as vocabulary fine-tuning, adapted machine translation models, custom speech recognition, and profanity filtering, and it makes remote operators, professional captioners, and interpreters available as add-on services. The company publishes ongoing product updates into 2026, confirming it is actively operating. Pricing varies by plan. Check the official website for current pricing.
Best suited for
DubTab is a free tier with paid upgrades (freemium); spf.io is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | DubTab | spf.io |
|---|---|---|
| Core capability | Real-time translated subtitles overlaid on any audio-playing browser tab | Automatic live captions and translation in 100+ languages, with translated audio in 70+ |
| Standout feature | Low-latency AI voice dubbing that speaks the translation aloud | Projector display of up to four languages plus mobile QR/URL attendee access |
| Team usage | Optional bilingual captions showing original and translation simultaneously | Integrations with Zoom, Teams, Google Meet, YouTube, OBS, StreamYard, vMix, and Twitch |
| Integrations | Support for 50+ languages with selectable AI voices | Supervised/edited captioning and bidirectional translation modes |
| Languages & capture | Works across video, streaming and meeting platforms (YouTube, Twitch, Zoom, Google Meet, Teams, Udemy, Coursera) | Vocabulary fine-tuning, custom speech recognition, and adapted translation models |
| Best-fit workflow | In-tab audio processing with no file uploads required | Optional professional captioners, interpreters, and remote operators as add-ons |
DubTab
Choose DubTab if you need following zoom, google meet or teams meetings in another language with live captions and dubbing — strengths include real-time, low-latency translation works live across meetings, courses and streams without pausing.
spf.io
Choose spf.io if you need captioning and translating large in-person conferences across projectors and mobile devices — strengths include very broad language coverage for both captions and translated audio.
DubTab
spf.io
It depends on your workflow. DubTab is strong for following zoom, google meet or teams meetings in another language with live captions and dubbing, while spf.io is strong for captioning and translating large in-person conferences across projectors and mobile devices. Both transcribe and summarize meetings.
DubTab is a free tier with paid upgrades and spf.io is a free tier with paid upgrades. Check each vendor's pricing page for the latest plans and free-tier limits.
You can — some teams pair them when each covers a different part of the meeting workflow.
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