Post on X daily without missing a single day.
Paste your old tweets once. FastPost AI builds your voice profile and writes every post in your exact style.
your idea
fastpost ai generated post
Your Name
@yourhandle
How it works
From idea to post in 3 steps
No prompting skills needed. No blank page. No second-guessing your wording.
Paste your old posts
Copy 10–15 of your existing X posts into FastPost AI. The AI analyzes your tone, structure, emoji usage, and writing patterns.
Drop your idea
Type a rough idea — it doesn't have to be perfect. A few words or a sentence is enough to get started.
Get your post
FastPost AI generates a tweet in your exact voice in seconds. Copy it and post. Done.
The difference
Writing posts manually is draining
Every creator knows this feeling. FastPost eliminates it.
Without FastPost AI
~25 minutes
per post
- Stare at a blank page for 10 minutes
- Research the right angle and hook
- Write a draft that doesn't feel right
- Rewrite it 3 more times
- Second-guess every word before posting
With FastPost AI
~30 seconds
per post
- Type your idea (one sentence is enough)
- Hit Generate
- Copy your post — done
And it sounds like you — not a generic AI.
See it in action
Watch FastPost AI in action
Loading interactive demo...
Chrome ExtensionReply fast. Post often. Grow faster.
FastPost AI puts an AI button inside X — paste a few old tweets, we learn your voice, and every reply you generate sounds exactly like you wrote it.
Generated Reply
25 min per post is wild. That's why you built @FastPostAI. Use @AnthropicAI for drafting. Cuts it down to like 5 min for a first pass.
Never leave X
One click opens the reply generator right inside the compose box. No tab switching, no copy-pasting.
Your voice, not AI's
Replies are generated using your trained style profile — they sound like you wrote them, not like ChatGPT. Reply in your voice instantly.
Reply in seconds
See a tweet. Click AI Reply. Copy the result. Post it. The whole flow takes less time than typing a bad reply. Grow on X with AI replies faster.
Why FastPost
Everything you need to grow on X consistently
Built specifically for X creators who want to show up every day without burning out.
Your style, not AI's
Most AI tools sound like AI. FastPost AI is trained on your actual posts — so every output sounds like you wrote it.
Seconds, not hours
From idea to ready-to-post tweet in under 30 seconds. No editing, no rewriting, no blank page.
Never run out of ideas
FastPost AI learns what you write about and suggests 6 post ideas tailored to your topics. Pick one and generate — no brainstorming needed.
Regenerate instantly
Don't like the result? Hit regenerate and get a fresh take on your idea — same style, different angle.
Built for X / Twitter
Every post is optimized for X — character limits, hooks, CTAs, hashtags and mentions handled automatically.
Built to grow your audience
Posts are written to hook readers, spark engagement, and attract followers — not just fill your feed.
Pricing
Simple, transparent pricing
Start for free. Upgrade when you need more power and the Chrome extension.
Free
- 5 posts generated per day
- AI reply generator (10/day)
- Style + Topic profile (full quality)
- Web app access
Creator
- Unlimited post generation
- Unlimited AI replies
- Chrome extension (inline X replies)
- Style + Topic profile (full quality)
- Early access to new features
Have a discount code?
Start posting in your voice today
Train your style once. Generate tweets forever. No credit card required.
Get Started