Naval @naval · 2h
Most founders over-plan and under-ship.
Chrome extension · launching soon
Reply in your voice.
Not ChatGPT's.
ReplySathi drafts three replies for any tweet — in your words, your rhythm, your slang. Hindi-English included. You pick one, tweak it, hit reply.
Free plan forever, no card. Built for indie hackers, founders and creators growing on X the honest way — by replying.
✦ ReplySathi
Agree & add value
Three angles, not three paraphrases. Edit anything before you send.
Thirty seconds of setup. Then it's just a button.
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01
Teach it your voice
Paste three to five of your own tweets into the extension. That's the entire setup — no training, no waiting. It reads your sentence length, your punctuation habits, whether you capitalise.
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02
Hit ✦ on any tweet
A small spark sits in the tweet's action bar, next to reply and like. Click it and three drafts appear right under the tweet. Works on the timeline, on profiles, inside threads.
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03
Pick one and send it
Click a draft — it lands in X's own reply box. Change a word, change all of them, or write something else entirely. You press Reply. Always.
Every other AI reply tool has one voice.
It's this one.
You've seen it a thousand times in your replies. Everyone can spot it. It's why AI replies get ignored — and why they quietly cost you followers.
Great point! Execution truly is everything. Planning without action leads nowhere. 🚀 Keep shipping! #startup #founders #buildinpublic
Four tells: the opener, the emoji, the hashtags, the zero information.
guilty. sat on a landing page for 3 weeks polishing copy. launched it, got the same feedback in a day.
Lowercase because you write lowercase. Specific because you're specific.
bhai yeh sach mein hota hai. 3 hafte landing page pe gaye, launch kiya toh ek din mein wahi feedback mil gaya.
Roman script, natural code-switching, only where it actually fits the tweet. No forced Hindi. No competitor ships this.
- A voice profile, not tone presets. Presets give you four flavours of the same robot. Your tweets give you you.
- It never posts. No auto-reply, no scheduling, no bot behaviour. The draft goes in the box; your thumb does the rest.
- Hinglish that isn't cringe. Switches only where a Hindi word is genuinely the better word.
Competitors start at $39/mo.
We start at free.
Free
$0forever
To find out whether it sounds like you.
- 10 replies a day
- Voice profile
- All four tones
- Hinglish mode
Most people land here
Starter
$9/month
For a daily reply habit that actually compounds.
- 50 replies a day
- Everything in Free
- Priority generation
- All major cards
Pro
$19/month
For people who reply like it's a job. Because it is.
- Unlimited replies
- Everything in Starter
- Multiple voice profiles
- Early access to new features
Cancel any time. Prices in USD.
Straight answers
Is this against X's rules?
ReplySathi doesn't automate posting. It drafts text, puts it in X's own reply box, and stops — you read it, edit it, and press Reply yourself. That's the same category as a keyboard suggestion, not a bot. X's automation rules target unattended posting, spam and bulk engagement, and we deliberately make all three impossible. We'd still say read X's rules yourself and use it like a person, not a machine gun.
Does it auto-post?
No. There is no code path in the extension that clicks X's Reply button. That is a deliberate design decision, not an unshipped feature, and it isn't coming.
What data do you store?
Your email and a count of how many replies you generated today. That's it. The tweet you're replying to is sent to the model to generate the draft and is never written to a database. Your voice profile is stored so replies keep sounding like you. We don't read your DMs, we can't post as you, and we don't sell anything to anyone.
Will the replies actually sound like me?
In proportion to the effort you put into the voice profile. "Casual and friendly" gets you a generic bot. Five of your real tweets pasted in gets you something your followers won't clock as AI. It takes two minutes and it's the whole product.
Which browsers work?
Chrome, Edge, Brave, Arc — anything Chromium-based. Firefox and Safari aren't supported yet.
Do I need an API key?
No. Paid plans include generation. You sign in with your email and it works — no keys, no billing dashboards, no usage surprises.
Get in before launch
Early access, founding-member pricing locked for a year, and a say in what gets built next. No spam — you'll hear from us when there's something to open.