# SonicCaption Review Chrome and Edge extension that shows live bilingual subtitles on any browser tab, with no file uploads and no meeting bot. ## Editor's Score: 68/100 Capability scores 16 because SonicCaption does its single job (live bilingual overlay captions at roughly 0.5-second latency) well, but it has no transcript export, no speaker diarization, and no dubbing output, features that Tremigos and other directory competitors include. Ease of use scores 21 because the install-and-click workflow is genuinely minimal and the pricing page is unusually plain-spoken. Value scores 17 because the free tier is only 20 minutes per month, which is too thin to evaluate the product properly, and the Starter plan at $10 per month for 8 hours is reasonable but the jump to $39 for 50 hours is steep for a solo learner. Delivery scores 14 because the tool is a solo-developer project with no published uptime record, no user review corpus found in search, and no transcript or export functionality to verify output quality beyond live display; the narrow browser-only delivery (Chrome and Edge only) further limits who can actually use what is promised. ## Pros - Zero-upload, zero-export architecture means it works on live streams, paywalled courses, and browser-based meetings that file-upload tools cannot touch. - Dual-subtitle mode shows original speech and translation simultaneously, a genuinely useful distinction from single-language caption overlays. - Privacy model keeps raw audio inside the browser tab; only processed text segments leave the device, which matters for users on sensitive work calls. ## Cons - The free tier is capped at 20 minutes per month, which is not enough to evaluate the tool across a real week of use before committing to a paid plan. - Extension-only delivery locks out Safari and Firefox users entirely, and there is no desktop app or mobile option for audio outside a browser tab. - No transcription export, speaker labels, or dubbing output: the tool does one thing (live overlay captions) and stops there, so users who later need a searchable transcript have no path forward within SonicCaption. ## Pricing Freemium. A free tier is available. - Free: $0 - Starter: $10/mo - Pro: $20/mo - Power: $39/mo - Ultra: $79/mo - Team / Enterprise: Custom Pricing reflects what we saw at the time of review (2026-10). Confirm current pricing on the official site. Category: AI Voice, Audio & Music (https://aitoolseekers.com/category/ai-voice-audio-music) Official site: https://soniccaption.com/ Last verified by a human: 2026-10-02 Reviewed by a human at AI Tool Seekers, a hand-reviewed AI tools directory. Every listed tool is verified by a person before publishing. Scores are editorial opinions from a fixed rubric (capability, ease of use, value, delivery on promise) and cannot be bought; there is no pay-to-rank. Directory: https://aitoolseekers.com This review: https://aitoolseekers.com/tools/soniccaption Methodology: https://aitoolseekers.com/how-verification-works ## Verdict SonicCaption is the right pick for solo language learners and remote workers who need live bilingual subtitles inside their browser without installing a meeting bot or uploading files. The free tier caps at just 20 minutes per month, which is barely enough to evaluate it, and the tool only works in Chrome and Edge, so anyone on Safari or Firefox is out immediately. If your need is translation at scale across a team, or you want dubbing and transcription export rather than live overlay captions, Tremigos covers that ground more broadly. Best for: Language learners and remote workers watching foreign-language content in Chrome or Edge Not for: Safari or Firefox users, teams needing transcription export or dubbing ## Overview SonicCaption is a Chrome and Edge browser extension that generates live bilingual subtitles for any tab playing audio. You install it, open a tab with video or audio, pick your source and target languages, hit Start, and subtitles appear on top of the page in roughly half a second. There are no files to upload, no exports to wait for, and no separate app to run alongside your browser. What separates it from most captioning tools is the combination of zero-upload architecture and dual-subtitle display. Most transcription services ask you to upload a file or paste a URL; SonicCaption listens to whatever the tab is playing, which means it works on live streams, Zoom calls opened in a browser tab, and paywalled course platforms equally. The dual-subtitle mode shows the original speech and the translation simultaneously, which is specifically useful for language learners who want to check comprehension rather than just read a translation. The tool is a solo-developer project built by Ethan Hu, a software engineer who uses it daily for work meetings and language study. That context matters: the feature set is tightly focused on the live-caption use case and does not branch into transcription export, speaker diarization, or dubbing. The privacy model is also worth noting: audio processing stays within the browser tab, and only text segments are sent for translation, not raw audio streams. ## Who should use it SonicCaption fits a specific kind of user well: someone who regularly watches foreign-language YouTube videos, follows live streams in another language, or sits through Zoom meetings where the primary language is not their own. A language learner working through Japanese anime or a Korean variety show gets genuine value from seeing both the original and the translation at once. A non-native English speaker attending daily English-language standups in a browser tab gets a live safety net without asking IT to install anything. Anyone who needs more than live overlay captions should look elsewhere. If you want to export transcripts, identify speakers, or produce dubbed audio, Tremigos handles all of those workflows and supports 60-plus languages with a more complete production toolset. If your primary need is high-quality voice synthesis or text-to-speech rather than captioning, ElevenLabs is the better fit. And if you are on Safari or any browser outside Chrome and Edge, SonicCaption simply will not run. ## FAQ Q: How much does SonicCaption cost, and is there a free plan? A: Yes, there is a free plan at $0 that gives 20 minutes of captioning per month. Paid plans start at $10 per month for 8 hours (Starter) and go up to $79 per month for 120 hours (Ultra). Annual billing cuts prices by 30%. Q: Does SonicCaption work with Zoom and Google Meet? A: Yes, as long as you open Zoom or Google Meet in a browser tab rather than the desktop app. SonicCaption listens to whatever audio the tab is playing, so browser-based meeting calls are supported. Q: Which browsers does SonicCaption support? A: SonicCaption is available as a Chrome and Edge extension only. Safari and Firefox are not supported, and there is no desktop or mobile app. Q: Is my audio sent to a server? A: Audio stays within the browser tab. Only processed text segments are sent externally for translation, not the raw audio stream. Q: Can I export transcripts or get speaker labels? A: No. SonicCaption is focused on live overlay captions and does not offer transcript export, speaker diarization, or dubbing. If you need those features, you would need a different tool. Q: Does the yearly plan actually save money? A: Yes. Switching to annual billing saves 30% across all paid tiers. For example, the Pro plan at $20 per month would drop to the equivalent of $14 per month billed annually.