> **Methodology in brief.** A first-party data duel. **Post**: impressions measured on **625 real posts** (LinkPost database). **Comment**: impressions on **657,722 real comments** + **creation time measured on 44,523 comments** written with LinkHub (LinkHub database). Creation times *without a tool* and the *number of clients generated* are **not measured**: they are treated as estimates or explicit reasoning — flagged as such. No invented figures.

## Key takeaways

- **The post wins on raw reach per unit**: **1,607 median impressions** (3,179 average) per post, versus **35 median** (179 average) per comment. *(LinkPost n=625 · LinkHub n=657,722)*
- **But the post is expensive in time**: ~**30-60 min** by hand *(estimate)*, cut to **1-5 min with [LinkPost](https://www.linkpost.gg/fr)** *(estimate)*. A comment with LinkHub takes **~29s — measured** (median, n=44,523).
- **The post requires an audience** to distribute; the **comment requires none** — you borrow the audience of large creators. It's the best **entry point** with no established network.
- **Effort/reach ROI**: the comment is **repeatable** and near-instant → it wins on *impressions per minute* and accessibility, especially when starting out.
- **Verdict: they're complementary.** The winning combo = **posting (LinkPost) + commenting (LinkHub)**. The post builds your authority (E-E-A-T), the comment puts you in front of the right audiences today.
- ⚡ **Commenting amplifies your OTHER channels.** A daily commenting routine (~10-15 min/day) boosts the reach of your own posts by roughly **+29%** *([LinkPost algorithm study](https://www.linkpost.gg/fr/playbooks/linkedin-algorithm-playbook-2026))* — and warms up your prospects, so **more replies to your messages**. Commenting doesn't compete with your other channels: it **boosts them all**.

## 1. The numbers duel: post vs comment

Here is the central table, row by row, from our two first-party datasets.

| Criterion | **POST** *(LinkPost)* | **COMMENT** *(LinkHub)* |
|---|---|---|
| **Median reach** | **1,607 impressions** *(avg. 3,179)* | **35 impressions** *(avg. 179)* |
| **Engagement received** | avg. reach ~709, ~17 profile views | 0.90 like · 0.71 reply |
| **Time by hand** *(estimate)* | 30-60 min | 30s – 2 min |
| **Time with the tool** | 1-5 min *(LinkPost, estimate)* | **~29s — measured** *(p25 12s · p75 68s)* |
| **Audience required** | Yes — you need a network to distribute | **None** — you borrow the host's |
| **ROI / accessibility** | High reach per unit, but costly and gated by audience | Low reach per unit, but **repeatable, instant, no prerequisite** |

**Reading.** Per unit, the post crushes the comment on reach: **1,607 vs 35** median (×46), **3,179 vs 179** average (×18). That's logical — a post **is your own distribution** to your network. But that reach has two conditions: **having an audience** that reads you, and **investing 30-60 minutes** of writing (cut to a few minutes with [LinkPost](https://www.linkpost.gg/fr)). The comment caps lower per unit — but it's produced in **~29 measured seconds** and **requires no audience**.

## 2. Raw reach per unit: the post wins (and that's honest)

Let's be clear: **on a single unit of content, the post is unbeatable.**

- **1,607 median impressions** per post (n=625, real impressions) — that's your direct distribution.
- Distribution: **p25 1,007 · p75 2,806 · p90 5,584**. Even the bottom-of-the-barrel post (p25) far exceeds the median comment.
- The post builds your **authority**: it's *your* name, *your* angle, *your* demonstration of expertise. It's the E-E-A-T foundation a comment doesn't replace. LinkPost's [algorithm playbook](https://www.linkpost.gg/fr/playbooks/linkedin-algorithm-playbook-2026) details how to maximize that reach, and our [breakdown of the LinkedIn algorithm in 2026](/en/blog/algorithme-linkedin-2026) explains why the first hour is decisive.

The comment, conversely, generates **35 median impressions** (179 average — the average is pulled by a long tail of viral comments). See our detailed [comments vs likes](/en/blog/commentaires-vs-likes-linkedin) study for the real value of a comment.

**Conclusion of step 1:** if we looked *only* at reach per piece, we'd post all day. But time and audience change everything.

## 3. Does the post really cost more in time?

Yes — and this is where the comment takes the lead back.

- **Writing a post by hand**: ~**30-60 min** *(estimate)* — find the angle, structure, hook, proofread.
- **With [LinkPost](https://www.linkpost.gg/fr)**: ~**1-5 min** *(estimate — AI generation takes a few seconds, editing takes the rest)*. A massive gain, but still longer than a comment.
- **Writing a comment by hand**: ~**30s – 2 min** *(estimate)*.
- **With LinkHub**: **~29s — measured** (median, n=44,523; p25 12s, p75 68s). And **52% of comments are edited by hand** (human-in-the-loop) — so validated by you, not raw AI copy-paste.

In other words: in the time it takes to write **one** post (even optimized with LinkPost, say 5 min), you can publish **~10 comments** by hand with LinkHub (~29s each). For the optimal timing of those comments, see [when to comment on LinkedIn](/en/blog/quand-commenter-sur-linkedin).

## 4. So, comment or post: which has the best ROI?

ROI isn't measured in raw reach, but in **reach per minute invested** and **accessibility**.

> ⚠️ **The number of clients generated is measured nowhere.** What follows is **explicit ROI reasoning**, not a statistic. We compare orders of magnitude of effort and reach, not conversions.

- **Impressions per minute.** A LinkPost post: ~1,607 median impressions for ~1-5 min → on the order of **320 to 1,600 impressions/min**. A LinkHub comment: ~35 median impressions for ~29s → on the order of **~70 impressions/min**. *On paper, the post wins here too* — **provided you have the audience that receives those impressions.**
- **The post's blind spot: audience.** Those 1,607 impressions assume a network that reads you. **Without an established audience, a post falls flat** — few followers, little distribution. The comment, on the other hand, **borrows a large creator's audience**: its 35 median impressions don't depend on *your* network, but on theirs. It's the **best entry point** when you start from zero — see [commenting when you start with no audience](/en/blog/commenter-linkedin-debutant-sans-audience).
- **Repeatability and accessibility.** A comment is instant, has no prerequisite, and you can do **10+ per day** without fatigue. It's an acquisition channel **available immediately**, where the post requires building an audience first.

**The ROI verdict:** the **post** has the best ROI *once you have an audience*. The **comment** has the best ROI *for effort/reach at the start* and remains the most accessible and repeatable channel. They're not competitors.

## 5. The real answer: they're complementary

The false debate is "comment **or** post." The right strategy is **both**:

- **The post (LinkPost) builds your authority.** It's your direct distribution, your demonstration of expertise, your E-E-A-T foundation. Essential in the long run — and 10× faster with [LinkPost](https://www.linkpost.gg/fr) than by hand. Read its [2026 algorithm playbook](https://www.linkpost.gg/fr/playbooks/linkedin-algorithm-playbook-2026) to get the most out of it.
- **The comment (LinkHub) puts you in front of the right eyes today.** No audience required, in ~29s, repeatable. It feeds your network *while* your posts build it — a virtuous circle. Gather your targets in [personalized feeds](/en/features/feeds-personnalises) and write fast with [personalized AI comments](/en/features/ia-commentaires-personnalises) (always approved by you).

**The multiplier effect: commenting lifts everything else.** Commenting on the right creators doesn't just earn impressions in the moment — it **warms up your profile and network**, and it spills over to all your channels:

- **Your posts get seen more.** A daily commenting routine boosts the reach of your own posts by roughly **+29%** *([LinkPost algorithm study](https://www.linkpost.gg/fr/playbooks/linkedin-algorithm-playbook-2026))*: you borrow the leaders' audiences and the algorithm distributes you more widely. And when comments land on your posts, [replying fast](/en/blog/repondre-commentaires-ses-posts-linkedin) extends your reach even further.
- **Your messages get more replies.** A prospect who has already seen you comment relevantly is far more likely to reply to your message than to a cold approach *(warm-vs-cold reasoning, not measured)* — that's the heart of [social selling through comments](/en/blog/social-selling-commentaires-linkedin) and the path to [finding clients via comments](/en/blog/trouver-clients-linkedin-commentaires).
- **All your channels rise together.** Commenting isn't an isolated channel: it's a **multiplier** that feeds your posts, your messages, and your overall visibility.

Winning combo: **post 2-3× a week with LinkPost** + **comment 5-10× a day with LinkHub.** The post gives you reach and credibility; the comment gives you volume and access to audiences you don't have yet.

## FAQ

**Is it better to comment or post on LinkedIn?**
Both — they serve different goals. The **post** wins on raw reach (1,607 median impressions vs 35 for a comment) and builds your authority, but requires an audience and 30-60 min (1-5 min with LinkPost). The **comment** earns less per unit, but takes ~29s (measured), requires no audience and is repeatable. Ideal: combine the two.

**How many impressions does a post vs a comment earn?**
Post: **1,607 median impressions** (avg. 3,179), LinkPost data on 625 posts. Comment: **35 median** (avg. 179), LinkHub data on 657,722 comments.

**How long does a comment take with LinkHub?**
**~29 seconds median** (p25 12s, p75 68s), measured on 44,523 comments. 52% are edited by hand before publishing.

**Why start by commenting when you have no audience?**
Because a post without an audience falls flat, whereas a comment borrows a large creator's audience. It's the most accessible and repeatable entry point to get seen before you have a network.

**Are LinkHub and LinkPost competitors?**
No, complementary. LinkPost helps you **post** (reach, authority); LinkHub helps you **comment** (access to audiences, volume). The combo covers both levers of LinkedIn presence.

## Sources & methodology

- **LinkPost dataset** — impressions per post on **625 real posts**: median 1,607, average 3,179, p25 1,007, p75 2,806, p90 5,584; avg. reach ~709, ~17 profile views. See [LinkPost](https://www.linkpost.gg/fr) and its [2026 algorithm playbook](https://www.linkpost.gg/fr/playbooks/linkedin-algorithm-playbook-2026).
- **LinkHub dataset** — impressions per comment on **657,722 comments** (avg. 179 / median 35; 0.90 like; 0.71 reply); **creation time measured on 44,523 comments** (median ~29s, p25 12s, p75 68s; 52% edited by hand).
- Creation time *without a tool* and *clients generated*: **not measured** → treated as estimate / explicit ROI reasoning.
- Sister studies: [When to comment on LinkedIn?](/en/blog/quand-commenter-sur-linkedin) · [Comments vs likes](/en/blog/commentaires-vs-likes-linkedin)