Links don't cost founders engagement on LinkedIn, hashtags do nothing and PDF carousels are the weakest format, according to a Megaphone study of 180,011 LinkedIn posts by 4,485 founders and CEOs of funded startups. With everything else held constant, a link on an opinion or advice post made no measurable difference (1.01x the founder's usual engagement) and hashtags landed between 0.97x and 1.02x. Asking for comments got 0.97x. One photo got 1.38x. A PDF carousel got 0.84x.
Most LinkedIn advice travels as a set of rules, like keeping links out of the post, adding three to five hashtags, using carousels, ending with a question and putting every sentence on its own line. Those rules rarely come with a number attached.
So we tested them, on founders only. We took 160,540 English posts from 3,932 founders and measured each post against the same founder's usual post. Where features travel together (long posts often carry photos, for example), we held the others constant. A rule made this list only if the result showed up in both of two random halves of the founders.
Most of the rules didn't survive. The things that rarely get called rules, like photos, length and tagging the people involved, mattered far more.
If you want to see how your own posts compare first, check your profile against the founder benchmarks. It takes about a minute.
What we found
- Links don't cost founders engagement. On opinion and advice posts a link made no measurable difference (1.01x, controlled). On raise, hiring and launch posts, posts with a link did better, at 1.19x to 1.25x.
- Hashtags do nothing. The raw 1.28x comes from announcements using more of them. Held constant, the effect is 0.97x to 1.02x.
- Photos beat carousels. Several photos got 1.69x and one photo 1.38x. PDF carousels and text-only posts both got 0.84x.
- Comment prompts barely work. Ending with "What do you think?" got 0.97x and didn't raise comments overall. On story posts, a comment prompt cost about 8% of comments.
- Timing and formatting tricks are noise. Every day of the week performed the same. One-line paragraphs showed no effect once length was held constant, and bullets and emojis showed no consistent pattern.
Which LinkedIn rules hold up for founders?
Very few. This table puts each common rule next to what the founder data says, with each post measured against the same founder's usual post:
| Common rule | What we found | Effect |
|---|---|---|
| Links kill reach | No measurable effect on opinion and advice posts | 1.01x |
| Use 3 to 5 hashtags | No effect once announcements are accounted for | 0.97x to 1.02x |
| Carousels get the most engagement | Weakest format, tied with text only | 0.84x |
| Ask a question to get comments | No lift, no extra comments overall | 0.97x |
| Open with a question | Costs opinion and advice posts about 13% | 0.87x |
| One sentence per line | No difference once length is held constant | 1.10x vs 1.29x raw |
| Post on a weekday morning | Every day performs the same. 6 to 8am is best, by about 6% (US founders) | 1.06x at 6 to 8am |
Several of these rules look right in raw comparisons. Hashtags are the clearest case, as you'll see below. A habit that shows up more often on strong posts can look like the cause of the strength.
Do links hurt LinkedIn reach?
For founders, a link made no measurable difference to engagement. On opinion and advice posts (takes, advice, lessons) a link came in at 1.01x the founder's usual engagement, with format, length, tags and the other features held constant.
On announcement posts, links went with better results. These figures compare posts of the same type with each other, with the other features held constant:
| Post type | With a link vs without |
|---|---|
| Opinion and advice | 1.01x |
| Fundraise | 1.25x |
| Hiring | 1.22x |
| Product launch | 1.19x |
I wouldn't read that as links boosting announcements. A raise post with a link usually points at press coverage, a hiring post at a job page, a launch post at the product. Those links probably mark real news. The safe reading is that a useful link didn't cost these founders anything we could measure.
Company size shifts it a little. Founders of bigger companies got more from links, 1.27x at 200+ employees against 1.07x at 1 to 10 employees.
One limit matters here. We measured engagement (reactions, comments and reposts), because LinkedIn doesn't show impressions on other people's posts. A link could, in principle, cost a post some impressions while the people who do see it engage as usual. Our data can't rule that out. What it does show is that on opinion and advice posts, the founders who used links got the same response from their audience as when they didn't.
The popular workaround, posting the link in the first comment, comes from the same worry. It's a fine habit if it makes you more comfortable, and it does keep the post itself clean. Just know it isn't something our data shows you need.
The study didn't split links by where they sat, so it can't settle the "put it in the comments" question.
How does this compare with studies that say links cut reach?
One large public study on this is MagicPost's analysis of 566,957 LinkedIn posts with synced analytics, published in the 12 months up to June 2026. In their pooled data, posts with an attached link preview reached 414 median impressions against 795 for posts without one. A URL typed into the post body reached 858, about the same as no link at all (786).
In a separate study of 2026 algorithm changes, MagicPost compared each author with their own posts without links. Since mid-May 2026, they found a typed URL sat 21% below, a link card 19% below and a "link in the comments" line 16% below. They point out a confounder themselves: posts with a link card are almost all LinkedIn's article format, which is the weakest format in their data anyway.
Our numbers and theirs measure different things, and three differences matter.
- What's measured. MagicPost measured impressions on accounts that connect their analytics. We measured engagement on founders' public posts. A post can lose impressions and keep its engagement.
- Who's in the data. Their pool is posts from any account that syncs analytics with their tool. Ours is only founders and CEOs of funded startups.
- When. Their per-author figures shifted in mid-May 2026: a typed URL went from 12% to 21% below, a link in the comments from 8% to 16%, while a link card improved from 39% to 19% below. Our founders' posts go back further (a median of 906 days of history per founder), so many of our posts predate it, and our averages can't show a change that recent.
Putting the two studies together, links didn't cost founders engagement in our data, and a typed URL didn't cost reach in MagicPost's pooled data, though it did against the same author's own posts. If a post needs a link to be useful, include it. If the link is the whole point of the post, a bare "read my article" with a preview card, that's the case MagicPost's data argues against.
Do hashtags help on LinkedIn?
No. Hashtags made no difference to founder posts once everything else was held constant.
| Comparison | Posts with hashtags vs without |
|---|---|
| Raw | 1.28x |
| With everything else held constant | 0.97x to 1.02x |
Announcement posts (raises, launches, new hires) use more hashtags than everyday posts, and announcements get more engagement for their own reasons. Count hashtag posts against non-hashtag posts and the hashtags look like they work. Compare like with like and the effect disappears.
Plenty of guides still say otherwise. Knapton Wright's LinkedIn hashtags guide, one of the top results for "LinkedIn hashtags", says hashtags "usually increase the reach and potential engagement of your content". For founders of funded startups, we found no engagement effect at all.
If your company has a hashtag, or you're posting from an event that uses one, go ahead and add it. Picking the right five for every post is the part to drop.
Are carousels worth it on LinkedIn?
For founders, PDF carousels are the weakest format, tied with text-only posts:
| Format | Engagement vs the founder's usual post |
|---|---|
| Several photos | 1.69x |
| One photo | 1.38x |
| Video | 1.21x |
| Text only | 0.84x |
| PDF carousel | 0.84x |
Topic and length don't explain the gap. With both held constant, photos and video still got about 1.8 times what a carousel got.
The pattern repeats among breakout posts, the ones that hit 10 times a founder's usual engagement. Compared with their share of all posts, video showed up 2.0 times as often among breakouts, one photo 1.5 times, text 0.52 times and PDF carousels 0.21 times. Carousels also got reposted less, at 0.78x the founder's average reposts, against 1.34x for video.
My guess at why: people follow a founder for the founder. A photo of the team, the whiteboard or the stage looks like something that happened. A designed carousel looks like company marketing, and our data is hard on posts that sound like the company (0.92x for corporate voice, against 1.57x for a founder telling their own story).
You'll see all-account benchmarks that rank document posts highly. Those benchmarks cover all kinds of accounts, not only founders. For founders, a real photo did better on average.
How long should a LinkedIn post be?
Longer than most founders write. Engagement climbs with length up to about 1,300 characters and then levels off:
| Post length (characters) | Engagement vs usual |
|---|---|
| Under 300 | 0.74x |
| 300 to 699 | 1.09x |
| 700 to 1,299 | 1.27x |
| 1,300 to 1,999 | 1.29x |
| 2,000+ | 1.28x |
The big drop is at the short end. A post under 300 characters gets about three quarters (0.74x) of a founder's usual engagement. Past 1,300 characters there's no penalty for going long, and no gain either, so length should follow what you have to say.
Do line breaks, bullets and emojis matter on LinkedIn?
No formatting habit we tested made a consistent difference.
| Formatting choice | Engagement vs usual |
|---|---|
| One-line paragraphs ("broetry") | 1.10x |
| Normal paragraphs | 1.29x |
| Bullets (none, 1 to 2, 3 to 5, 6+) | 1.14x to 1.31x, no pattern |
| Emoji in the first line | 1.09x |
Normal paragraphs look better than broetry in the raw numbers, but that's because they tend to be longer posts. Hold length constant and the gap disappears.
First lines don't follow a single rule either. For posts of 500+ characters, a very short first line (under 40 characters) got 1.33x and a long opening paragraph (210+ characters) got 1.39x, with everything in between at 1.22x to 1.26x. Both ends of the range did slightly better than the middle, which doesn't support any one "hook" formula.
What did matter is what the first line says. On opinion and advice posts, opening with a question cost about 13% (0.87x), opening on a bold claim cost 5% (0.95x) and opening in a scene ("Last Tuesday, our biggest customer called...") gained 5% (1.05x).
Should you ask for comments on LinkedIn?
Asking barely helps. Posts ending with "What do you think?" or a similar prompt got 0.97x a founder's usual engagement, and the prompt didn't raise comments overall.
It depends a little on the post:
| Post type | Effect on comments |
|---|---|
| Opinion and advice, ending with a question | about 7% more |
| Opinion and advice, explicit comment prompt | about 5% more |
| Story posts, comment prompt | about 8% fewer |
The raw numbers make questions look worse than they are (0.85x on comments), because founders tend to add questions to post types that draw few comments anyway. Opening with a question hurts comments too, at 0.90x on opinion and advice posts and 0.64x on launch posts.
What drives comments is the kind of post. Against a founder's average comments per post, fundraise posts got 3.88x, milestones 1.33x and personal stories 1.26x. Opinion posts got 0.80x and advice 0.77x. Among story posts, origin stories (1.87x) and look-backs (1.95x) drew the most comments. If you want comments, write the post people want to answer, and skip the prompt. An origin story told alongside real news or a milestone with a number in it gives people something to say.
When is the best time to post on LinkedIn?
Timing barely matters. Every day of the week performed the same in our data, weekends included. By time of day, for US founders in local time:
| Time posted | Engagement vs usual |
|---|---|
| 6 to 8am | 1.06x |
| 9 to 11am | 1.02x |
| 12 to 2pm | 1.00x |
| 3 to 5pm | 0.98x |
| 6 to 8pm | 0.95x |
| 9 to 11pm | 0.93x |
By month, January was best (1.10x) and December next (1.08x). August and September were the weakest, at 1.00x.
These gaps are small next to everything else in this article. A photo is worth more than any posting time, and posting more often is worth far more than either. We covered that in how often founders should post on LinkedIn.
What does move founder posts on LinkedIn?
Tagging people was one of the strongest levers after format:
| People tagged | Raw | With everything else held constant |
|---|---|---|
| 1 | 0.97x | 0.98x |
| 2 to 3 | 1.16x | 1.08x |
| 4 to 9 | 1.48x | 1.25x |
| 10+ | 1.77x | 1.47x |
On opinion and advice posts, tagging 3+ people still added 1.38x with everything else held constant. It matters most for small accounts, because a tag puts the post in front of the tagged person's network:
| Founder's followers | Tagging 3+ people |
|---|---|
| Under 2.5k | 2.55x |
| 2.5k to 10k | 1.94x |
| 10k+ | 1.53x |
These compare posts with and without tags for the same founder, so read them against each other.
Two writing choices mattered as much or more. A post with concrete specifics (numbers, names, details) got 1.65x, and a founder telling their own story got 1.57x, against 0.92x for posts written in the company's voice.
What I'd do with each rule
- Keep a link when the post needs one. A job page on a hiring post, coverage on a raise post. Don't write a post whose only job is to send people somewhere else.
- Drop the hashtag routine. One for your company or an event is fine. Picking five is wasted effort.
- Use a real photo over a carousel. A team photo or a picture from the day did better than a designed PDF in our data.
- Write 700 characters or more. Under 300 got 0.74x. Past 1,300, write as long as the story needs.
- Format for reading. Short paragraphs, long paragraphs, bullets or none. Pick what makes the post easy to read and move on.
- Cut "What do you think?" It added 5% to 7% to comments at best, and cost story posts about 8%. Write something people have a view on.
- Tag the people who were part of it. Customers, colleagues, co-founders, investors. Only tag people who were actually involved, and the post reaches their networks too.
- Post when it's ready. The best posting time beat the average by 6%.
See where you stand
Paste your LinkedIn URL into the founder LinkedIn benchmark and you'll get your percentile for posting rhythm, followers, typical post engagement and engagement per 1,000 followers, against founders at your company size, plus the three changes worth making first.
For every table in the study, download the full report. It runs 15 pages on rhythm, formats, post types, stories, openings and tagging. For where founders stand overall, see the founder LinkedIn benchmarks.
How we did this
We identified 4,485 founders and CEOs of funded startups from the portfolios of venture firms and accelerators, and collected up to their last 50 LinkedIn posts (180,011 posts), their follower count and their company size on October 6, 2026.
- Engagement is reactions plus comments plus reposts, on English-language posts at least 14 days old, from the 3,932 founders with at least 10 such posts (160,540 posts). LinkedIn doesn't publish impressions for other people's posts, so this study doesn't measure reach.
- Every effect compares a post with the same founder's median post, so large accounts don't drive the result. A feature got a result only if at least 30 founders had 3 or more posts with it.
- "Held constant" means we checked each feature with the others (format, length, tags, links, post type and more) controlled for, using a regression on engagement relative to the founder's own median. Where that changed the answer, the controlled number is the one shown.
- We split the founders into two random halves and kept a finding only if it showed up in both.
- Post features (type, voice, opening) were tagged by AI and spot-checked against keywords. These are associations, and the checks above remove the obvious distortions, but not all of them.
To cite this study: "according to a Megaphone study of 180,011 LinkedIn posts by 4,485 founders and CEOs of funded startups."