The idea, in one sentence. You don't need to write a single post to grow on LinkedIn: by commenting on the right creators, at the right time, you borrow their audience and win visibility, network and clients. This guide is a step-by-step method, backed by our first-party LinkHub data. Third-party figures (comment weight, +29% reach) are estimates from cited, dated studies — flagged as such.
Key takeaways
- A post without an audience falls flat; a comment borrows a big creator's audience. In raw reach, the post crushes the comment (1,607 vs 35 median impressions) — but the post requires a network to distribute, the comment requires none. (see comment vs post)
- Volume is accessible: 20-49 comments/day generate on average ~4,587 impressions/day (and total reach never declines with volume). (see how many per day)
- The most underrated lever: who you comment on. A top-10% creator earns ~3.4x more impressions per comment than the median. (see who to comment on)
- And timing: commenting within the first 30 minutes earns ~3.8x more impressions than after 24h. (see when to comment)
- ⚡ Bonus: commenting also boosts your posts if you write them (~+29% reach, LinkPost study) — but you are not required to post to grow.
- Honesty: posting builds authority (E-E-A-T) over time, it's complementary — but it's not a prerequisite to get started.
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1. Why commenting is enough to grow (without posting)
The common belief — "to grow on LinkedIn, you have to publish" — has a blind spot: a post only exists if it has an audience to distribute it. Without an established network, the LinkedIn algorithm shows your post to 2-5% of your contacts; if early engagement is low, it dies (Teract, 2026).
The comment flips the equation. When you comment on someone else's post, you appear in front of the audience that creator has already gathered — with no upfront algorithmic filtering, and without having to build that audience yourself. That is the core difference, measured in our data:
| Criterion | POST | COMMENT |
|---|---|---|
| Median reach / unit | 1,607 impressions | 35 impressions |
| Audience required | Yes — you need a network that reads you | None — you borrow the host's |
| Time with the tool | 1-5 min (LinkPost, estimate) | ~29 s — measured (LinkHub, n = 44,523) |
| Repeatable / instant | Costly, gated by audience | Yes — no prerequisite |
Reading. Yes, a single post reaches further (×46 at the median). But that reach has two conditions: having an audience, and investing writing time. The comment caps lower per unit — yet it happens in ~29 measured seconds and requires no audience. That is precisely what makes it the best entry door when you start from zero (see also commenting as a beginner, with no audience). For the full numbers of the duel, see comment or post: what earns more.
2. Step 1 — Target the right creators (the #1 lever)
At equal effort, who you comment on swings your visibility by a factor of 1 to over 40. Across 4,861 analyzed creators, the median creator earns 36 impressions per comment; a top-10% creator earns 124 (~3.4x) and a top 1%, 357 (~10x). Same comment, same quality, same window — placed under the right creator, it's seen 3 to 10x more.
The right creator isn't necessarily the biggest by followers. It's the one who combines:
- Niche audience: their followers = your ICP (prospects, peers, decision-makers). An off-topic top 1% is worth less than a highly engaged niche creator.
- Real engagement: an account with 8,000 active followers often beats one with 80,000 passive ones. Reach follows engagement, not raw count.
- Consistency: a creator who posts often gives you more chances to comment early.
To identify these targets without guessing, LinkHub includes an AI profile recommendation: it analyzes your profile and activity to infer your ICP, then searches 100,000+ LinkedIn profiles for those with the best ROI for your niche — not just the biggest accounts. Details and data in who to comment on LinkedIn.
3. Step 2 — Comment early (the 0-30 min window)
The right creator isn't enough: you have to be there when the post goes out. Across 261,137 real comments, a comment posted within the first 30 minutes generates 391 impressions on average, versus 104 after 24h — that is ~3.8x more (and ~4.3x at the median). The decline is steady: every hour of waiting costs visibility.
The reason: a post gets most of its reach in its first hour. Commenting then means exposing yourself to the host post's audience peak. Early comments also get more replies → a thread forms, and LinkedIn distributes beyond the author's audience.
The practical problem: you can't watch the native feed continuously. That's the role of personalized feeds — gather your target creators to see their posts the moment they go live, without scrolling. You comment within the half hour, without missing the golden window. Full numbers in when to comment on LinkedIn.
4. Step 3 — Hold the volume (without spending your whole day)
Once the right targets are gathered and the window is mastered, the last lever is volume. And the good news is it's accessible: in our data, total reach climbs without ever declining with volume, from 581 impressions/day (1-7 comments) to 11,737/day (100+).
The reach/time sweet spot sits at 20-50 comments/day: strong total reach (~4,587 impressions/day), still-solid per-comment value (153) and a reasonable time cost. Because the real barrier to volume isn't the algorithm — it's time. With LinkHub, a comment takes ~29 s measured, so 30 comments ≈ ~15 min. That is what makes 20-50/day sustainable day after day.
This is exactly what LinkHub automates: spotting the right posts as soon as they go out, in the right slot, and writing the right comment with personalized AI comments (always approved by you). The full volume/reach detail is in how many comments per day.
5. Should you really never post?
Let's be honest: no, the post isn't useless. Posting builds your deep authority (E-E-A-T) over time, your voice, your positioning. The two channels are complementary, not competitors.
But two nuances change everything:
- The post isn't a prerequisite to start. You can win visibility, network and clients today by commenting, without waiting until you have an audience that makes your posts viable.
- ⚡ Commenting amplifies your posts if you write them. A daily commenting routine raises your own posts' reach by roughly +29% (LinkPost algorithm study) — and warms up your prospects before your messages. The comment competes with none of your channels: it boosts them all.
In other words: start by commenting to grow without depending on an audience, and add posting later for authority. The optimal order is comment first, post second — not the other way around.
FAQ
Can you really grow on LinkedIn without posting? Yes. By commenting on the right creators, you borrow their audience without having to build your own. A comment requires no audience to be seen (unlike a post), and the volume is accessible: 20-50 comments/day generate on average ~4,587 impressions/day in our data.
Why does a comment work without an audience, unlike a post? A post is distributed to your network; without an established network, it reaches 2-5% of your contacts and dies if early engagement is low. A comment appears in front of the audience already gathered by the creator you comment on — you don't have to build it.
How much time does it take per day? Count ~15-25 min/day for 20-50 comments with LinkHub (a comment ≈ 29 s measured). That's the reach/time sweet spot.
Should you still post eventually? It's not required to grow, but it's complementary: the post builds authority over time, and commenting additionally boosts your posts' reach (~+29%). Recommended order: comment first, post second.
Who and when to comment to maximize the effect? On creators with a strong audience in your niche (a top 10% earns ~3.4x the median), and within the first 30 minutes after publishing (~3.8x more impressions than after 24h). See who to comment on and when to comment.
Sources & methodology
- LinkHub first-party data — impressions per comment and per post, volume (user-day base), commented creators (
creator_stats_cache), measured creation time (n = 44,523). See comment vs post, how many per day, who to comment on, when to comment. - LinkPost — Algorithm Playbook 2026 (+29% reach) · Teract — Comment Strategy 2026 · Sprout Social — LinkedIn Algorithm 2026
- Find all our studies on the LinkHub blog.
About the author
Founder of LinkHub
Yannis writes about social selling, LinkedIn comments and visibility. He builds LinkHub, the extension that helps you attract qualified clients through your comments.
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