Everyone tells you to "be a reply guy" to grow on X. Reply to big accounts, get seen by their audience, gain followers.
It's not wrong. But most people do it wrong.
I've been building ShipPost — an AI-powered reply engine that scans your target accounts, scores tweets by relevance, and drafts replies in your voice. While building it, I became my own guinea pig. I set up 160+ target accounts and tracked everything.
Here's what the data taught me.
Most audiences are fake
Not "bot" fake. But functionally fake for your growth goals.
Some accounts have massive followings — 100K, 500K, millions. Their tweets get hundreds of likes. But their audience is passive. They scroll, they double-tap, they keep scrolling. They don't read replies. They don't click profiles. They will never follow you no matter how clever your comment is.
I had one account in my targets — a "content aggregator." They posted every 3-5 minutes. Just reposting viral videos and memes with no commentary. 25 tweets in 3 hours. Their posts got 30-200 likes each.
I replied to them multiple times through ShipPost. Zero engagement back. Zero followers gained. Dead air.
That's when I realized the tool needed to be smarter than just finding tweets to reply to.
So I built target performance tracking
ShipPost now tracks every reply you post — not just that you posted it, but what happened after:
- How many likes did your reply get?
- How many replies did your reply get?
- How many impressions?
- Did the original author engage with it?
It checks all of this automatically about 24 hours after you post, then rolls it up into a per-target effectiveness score.
After a few weeks, the data is undeniable. Some accounts consistently generate traction on your replies. Others are complete dead weight — you could write the most insightful comment of your life and it would get zero back.
The dead weight accounts now get surfaced so you can cut them. One click to remove a target, right from the reply card.
The accounts that actually work
The accounts worth replying to share specific traits:
- They write original thoughts, not reposts. Their audience follows them for their perspective, which means the audience is actively reading — including the replies.
- They reply back to comments. When an author engages with your reply, their audience sees it. It's an endorsement. This is 10x more valuable than any standalone tweet you'll ever write.
- They have a real community, not just followers. Look at their replies — do the same usernames show up consistently? That's a community. Those people will notice you too.
- They have reasonable reply counts. If a tweet already has 500 replies, yours is invisible. ShipPost automatically skips tweets with 80+ replies for this reason.
The framework
Before you add someone to your target list, ask:
- Do they create or curate? Creators have engaged audiences. Curators have passive scrollers.
- Do they reply to their own comments? If they never engage in their own replies section, their audience has learned not to look there either.
- What's their reply-to-follower ratio? 50K followers getting 3 replies per tweet = dead audience. 5K followers getting 20 replies = community.
- Is the audience relevant to you? Even a real, engaged audience is worthless if they're not your people.
What ShipPost does with all of this
The tool bakes these principles into the workflow:
- Scans your timeline for new tweets from your targets, filtering out replies, retweets, old tweets, and already-crowded threads
- AI scores each tweet for relevance to your profile and expertise
- Drafts a reply in your voice that you can edit, re-draft, or ship with one click
- Tracks performance on every reply so you learn which targets are worth your time
- Surfaces dead weight so you can prune your target list down to the accounts that actually move the needle
I started with 160 target accounts. I'm cutting down to about 40.
Those 40 — indie hackers, niche builders, engaged creators — generate more follower growth than the other 120 combined.
Quality over quantity
Stop being a reply guy to everyone. Be a reply guy to the right people. And if you want a tool that helps you figure out who the right people are — that's exactly what I built ShipPost to do.