01
Three tones
Friendly · Professional · Humorous
Every generate returns Friendly, Professional, and Humorous — one of each. Pick the draft that fits the thread.
NewYour Angle is here. Add your point of view and make every reply sound more like you.See what's new
Scale deal:1 year of Mobbin TeamReplies that keep up with the feed.
Three tones — Friendly, Professional, Humorous. Paste once.
Limited offer
Buy Scale → get 1 year of Mobbin Team
10 seats · worth $1,440
0 / 50
Claimed
Demo
See it work
How it works
A thread, pulled slowly.
02
Paste once
Open a post, generate, tap a draft. It lands in the composer. No copy-to-ChatGPT loop.
03
Credits don't expire
Signup grant and purchased packs stay until you spend them. No monthly wipe.
04
We don't post for you
Replyfast never sends the reply. You stay on the button. You hit post.
Pricing
Credits that stay.
Pack
Starter
$4.99
50 credits
One-time · Credits never expire
$0.10 / generate
Popular
Growth
$11.99
150 credits
One-time · Credits never expire
$0.08 / generate
Pack
Pro
$29.99
500 credits
One-time · Credits never expire
$0.06 / generate
Pack
Scale
$69.99
1,500 credits
One-time · Credits never expire
$0.047 / generate
FAQ
Before you install.
A Chrome extension for X. On a post, it drafts three reply tones so you can keep moving instead of staring at the composer.
No. We never send, schedule, or publish a reply. A draft pastes into the composer. You decide whether to post.
The three fixed tones on every successful generate. Friendly is like a friend, not support. Professional is clear, not a LinkedIn essay. Humorous is one beat, not a bit.
No. Generate on the post you are already reading. One click replaces the four-step copy-ask-copy loop.
No. Credits from the signup grant and from packs stay until you use them.
Starter is 50 credits for $4.99, Growth is 150 for $11.99, Pro is 500 for $29.99, and Scale is 1500 for $69.99. Completing Profile the first time grants 20 credits.
The post you are replying to, plus the ancestor chain needed to draft in context. It does not post as you and it does not send DMs.
Install Replyfast from the Chrome Web Store, then open any X post and generate.