How do their growth rates compare?

HearSub has a month-over-month growth rate of 0%; InterSub has -11.2%.

How does pricing compare?

HearSub: Free. Free for personal use with no usage cap, according to the product's help section. The team states that any optional paid features will be announced clearly in advance. InterSub: Freemium, Free Trial. Free to start with dual subtitles included. The free plan allows a limited number of word lookups each month; Pay-as-you-go and Premium plans add more lookups and unlock AI subtitle translation. Exact prices are listed on the site's plans page.

What are alternatives to HearSub and InterSub?

Other tools in related categories include Immersive Translate, Language Reactor, Trancy, AI Dubbing, Checksub.

HearSub vs InterSub — Traffic (0 vs 71.64K), Pricing & Verdict

Open AI Tools

HearSub vs InterSub — Traffic (0 vs 71.64K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	HearSub	InterSub
Official Domain	hearsub.ai	intersub.cc
Pricing Model	Free	Freemium, Free Trial
Monthly Visits	0 (0)	71.64K (71,644)
MoM Traffic Delta	0 (0%)	-9.04K (-11.2%)
Primary Market & Share	🌐 Global (—)	🇺🇸 United States (15.2%)
Direct Visits / mo	0	31.96K
User Rating	4.2	4.2
Supported Platforms	Website	Website

HearSub

Watch foreign-language YouTube videos in your own language, in real time

Real-time subtitle translation

HearSub translates only the lines near the current playhead and updates them as the video plays, so you do not wait for a whole file to finish processing.

Bilingual captions

Show both the original and translated text together to follow the meaning and pick up the source language as you watch.

Synchronized AI dubbing

HearSub prepares target-language audio ahead of playback so the AI voice tracks the speaker instead of lagging behind.

Stays in sync with the player

Translation and dubbing are tied to playback position, so switching between languages stays aligned with what is on screen.

Strengths & Pros

+No video upload needed, so it starts fast and keeps your files private
+Translated subtitles and AI dubbing update in step with the player
+Bilingual captions help with both comprehension and language learning
+Works as a lightweight browser extension across Chrome, Edge, Brave and Firefox
+