Build in Public. Scale Your Voice.
Close Deals.
Founders using X close 3x more deals. But who has time to engage? postmatic auto-comments on relevant posts while you build your product.
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.
Sound Familiar?
The struggle is real
You know you should be on X, but you're busy building product
Your competitors are gaining mindshare while you code
Investors follow active founders — you're invisible
Building in public works, but takes hours per day
How It Works
Set it once. Grow on autopilot
Install Extension
Add postmatic to Chrome. Connect your X account.
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. Your visibility grows every day.
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
Why Founders Love postmatic
Built for your specific needs
Network with VCs & Angels
Engage with investors without looking desperate. Show up in their feeds organically.
Build in Public
Share wins and losses with authentic comments. Let your journey attract customers.
Recruit Top Talent
Best developers follow active founders. Your presence attracts A-players.
Close More Deals
Prospects become customers when you engage. Turn comments into conversions.
founders building in public
“postmatic saves me 2 hours a day. I can engage with my community while still having time to ship features. Game changer for solo founders.”
Sarah Chen
Founder @ LaunchKit (YC W23)
Loved by users from
ProductHuntIndieHackersYCSimple Pricing
Try free for 3 days, then go Pro
Start with 5 auto-comments per day free. Upgrade for unlimited access.
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
You describe how you write — your tone, style, and topics — and how often to engage. postmatic then automatically finds relevant posts on X and comments in your voice. It runs in the background while you build.
No. You define the prompt — your voice, your style. postmatic generates contextual, human-sounding comments tailored to each post. Every comment is unique and relevant.
Yes! Define your exact voice with custom prompts. Whether you're technical, witty, or strategic — postmatic adapts to sound like you.
After 3 days, auto-commenting pauses until you upgrade to Pro. Your settings and prompt are saved, so you can pick up right where you left off.
That's the best time to start! Consistent engagement is how you build an audience. postmatic makes it sustainable — auto-commenting every day is more effective than sporadic bursts.
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