Grow Your X Audience
on Autopilot
Tell postmatic how you write and what you care about. It auto-comments in your voice on relevant posts while you focus on what matters.
Runs in your browser
No servers involved. The extension generates and posts comments directly from Chrome — your data never leaves your device.
Paced like a human
Randomized delays between comments and natural scrolling behavior. Designed from day one to avoid triggering X's automation detection.
No API keys. No credentials shared.
We never ask for your X password or API access. The extension works with your existing logged-in session.
How It Works
Set it once. Grow on autopilot.
Install Extension
Add postmatic to Chrome in one click. Connect your X account to get started.
Set Your Voice & Frequency
Describe how you like to engage — your tone, topics, and style. postmatic handles the rest.
Watch Your Audience Grow
postmatic auto-comments on relevant posts while you sleep, work, or create.
See It In Action
Comments that get you noticed
postmatic watches your X feed and auto-posts sharp, insightful replies on your behalf — while you sleep, work, or create. Every comment sounds like you wrote it.
- Engages with the biggest voices in your niche
- Thumbs up / down to train your AI over time
- Frequency controls so you never over-post
Elon Musk@elonmusk8m ago"The rate of AI progress is going to make 2025 look like the warm-up act."
the scary part isn't the models getting smarter. it's that most companies still think they're in a software upgrade cycle. they're not. the orgs being built right now are structurally different. the gap isn't closing, it's compounding.
MrBeast@MrBeast14m ago"Just spent $7M on a single video. Worth it if it gets 500M views."
$7m for 500m views is roughly $0.014 cpm. no ad network gets close. but the real thing is the video's basically a loss leader. customer acquisition for chocolate bars, burgers, prime. content is just your cheapest marketing channel at this point.
Marc Andreessen@pmarca21m ago"The next trillion-dollar company will be built by a team of 10 people powered by AI."
the bottleneck was always judgment, not headcount. you just couldn't route around it before. now you can multiply one person's taste across the whole org. the question is which 10 people actually have that judgment. that's the moat now, not capital.
Custom Prompt
You are crafting replies for a startup founder.
Voice: Confident, direct, no fluff.
Goal: earn follows by being genuinely insightful.
426 chars
Cycle Frequency
Approved Topics (3× priority)
Blocked Topics
Blocked Profiles
Fully Customizable
Trained to your voice.
Built for your goals.
Write a custom prompt that defines your tone, expertise, and positioning. Then tell postmatic exactly where to focus — and what to stay away from.
- Custom Prompt — Define your voice and style in plain English
- Approved Topics — Posts about these get 3× priority in ranking
- Blocked Topics — Never engages with content you want to avoid
- Blocked Profiles — Skip any account, no matter how big
- Cycle Frequency — From every minute to every hour — you decide
Features
Everything you need to grow on X
Auto-Commenting
Set your frequency and let postmatic engage on your behalf. Runs in the background while you browse.
Custom Prompts
Define exactly how you want to comment. Set your voice, tone, and topics. Every comment sounds like you.
Smart Scheduling
Choose how often to comment — from once an hour to every few minutes. postmatic paces engagement naturally.
Audience Growth
More visibility means more followers. Consistent commenting on relevant posts puts you in front of the right people.
Works Natively
Seamlessly integrates into X.com's interface. Looks and feels like a native feature.
Always Updated
We keep up with X.com's changes so the extension always works. Automatic updates.
Simple Pricing
Try free for 3 days, then go Pro
5 auto-comments per day for 3 days. Then upgrade for unlimited auto-commenting.
Pro Monthly
- Unlimited auto-comments
- Custom prompt rules
- Priority support
- Cancel anytime
Pro Annual
- Everything in Pro
- Billed annually
- Save ~$20 vs monthly
- Cancel anytime
All plans include a 30-day money-back guarantee. Powered by Stripe.
Frequently Asked Questions
postmatic is a Chrome extension that auto-comments on posts on X.com. You describe your voice and style in plain English, set how often to engage, and postmatic runs in the background — commenting on relevant posts to grow your visibility and audience.
You need to install the extension and connect your X account. The free trial gives you 3 days with 5 auto-comments per day. After that, you can upgrade to Pro for unlimited auto-commenting.
No. postmatic generates natural, contextual comments tailored to each post. You define the prompt and tone, so every comment sounds like you. The AI adapts to the context of each post.
Yes. We only access the posts you interact with. Your X credentials are handled securely through OAuth. We do not store your browsing data or personal information.
After 3 days, auto-commenting pauses until you upgrade. You can go Pro Monthly at $9.99/month or Pro Annual at $99/year to keep growing your audience.
Yes! All paid plans come with a 30-day money-back guarantee. If postmatic doesn't help you grow your audience on X, just email us and we'll refund you — no questions asked.
Set it. Forget it.
Grow your audience.
Automate your X engagement and watch your audience grow on autopilot.
Start Your Free Trial5 auto-comments/day for 3 days · Custom prompts · Runs on autopilot