Writing thoughtful replies on LinkedIn, X (Twitter), and Threads takes time. ReplyGen is a Chrome extension that places a toolbar directly inside each platform and generates context-aware reply draft - right inside the platform, no tab-switching needed. Features: ✓ BYOK — plug in your own Gemini API key for unlimited replies ✓ No OAuth required — we never access your accounts ✓ No post data stored ✓ 11 languages supported ✓ One-time payment — $9.99/platform, no subscription ever
Hey fellow Product Hunters! I'm Tanuj, the solo developer behind ReplyGen.
I built this after spending hours each day writing replies on LinkedIn and Twitter - time I'd rather spend building the product.
Most AI reply tools I found were subscription-only and required OAuth access to your accounts. I wanted none of that: one-time payment, works across all three major social platforms, and zero access to your login credentials and your posted replies.
The extension is live on the Chrome Web Store for LinkedIn, X/Twitter, and Threads. You get 25 free replies on signup - no card needed.
Happy to answer any questions about how it works, the tech stack (Chrome MV3, Gemini, Next.js), or what's coming next. Would love to hear which platform you'd want to see added (Bluesky? Reddit? Instagram?)
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Writing the perfect reply is often harder than creating the original post 😅 What I like about ReplyGen is that it focuses on helping people engage better instead of just generating more content.... what's the biggest mistake people make when responding online?
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Maker
@harini_mukesh Great observation and honestly it's what pushed me to build this in the first place.
The biggest mistake? Replying without a point of view. "Great post! Totally agree!" feels like engagement but actually signals to the algorithm and the person you're replying to that you didn't really read it. It's worse than not replying at all.
The replies that build real relationships are the ones that add something: a counterpoint, a personal example, a question that shows you actually thought about what they said.
ReplyGen tries to generate exactly that - personalized & context-aware replies that react to what's actually in the post, not just generic affirmations. Still takes a human to pick the right one and put their own spin on it, which I think is the right balance.
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The social reply co-pilot space is moving fast, most tools generate generic replies but the 'personalized' angle is what actually matters. Curious how ReplyGen handles context from long threads where the original post is buried under 50 replies... does it read the full thread or just the immediate reply target?
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Maker
@romeo_ciobanu Really sharp question — and the answer is platform-specific.
On X, ReplyGen walks the thread and collects all posts from the original author, filtering out other people's replies, so it gets the full context even in a long thread. On Threads it reads everything visible inside the reply composer. LinkedIn is the most limited right now - it reads the immediate post, no thread traversal yet.
The "buried original post" problem is real and it's the next thing I want to improve on LinkedIn specifically - pulling the root post even when you're replying 40 comments deep. You're right that context depth is what separates a useful reply from a generic one.
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Writing the perfect reply is often harder than creating the original post 😅 What I like about ReplyGen is that it focuses on helping people engage better instead of just generating more content.... what's the biggest mistake people make when responding online?
@harini_mukesh Great observation and honestly it's what pushed me to build this in the first place.
The biggest mistake? Replying without a point of view. "Great post! Totally agree!" feels like engagement but actually signals to the algorithm and the person you're replying to that you didn't really read it. It's worse than not replying at all.
The replies that build real relationships are the ones that add something: a counterpoint, a personal example, a question that shows you actually thought about what they said.
ReplyGen tries to generate exactly that - personalized & context-aware replies that react to what's actually in the post, not just generic affirmations. Still takes a human to pick the right one and put their own spin on it, which I think is the right balance.
The social reply co-pilot space is moving fast, most tools generate generic replies but the 'personalized' angle is what actually matters. Curious how ReplyGen handles context from long threads where the original post is buried under 50 replies... does it read the full thread or just the immediate reply target?
@romeo_ciobanu Really sharp question — and the answer is platform-specific.
On X, ReplyGen walks the thread and collects all posts from the original author, filtering out other people's replies, so it gets the full context even in a long thread. On Threads it reads everything visible inside the reply composer. LinkedIn is the most limited right now - it reads the immediate post, no thread traversal yet.
The "buried original post" problem is real and it's the next thing I want to improve on LinkedIn specifically - pulling the root post even when you're replying 40 comments deep. You're right that context depth is what separates a useful reply from a generic one.