Some of the most persuasive praise your company will ever receive is sitting in a LinkedIn comment thread right now. A customer replies to your launch post with "we switched to this last quarter and it cut our reporting time in half." Someone tags a colleague under your update and writes "you need to see this." A user you have never spoken to leaves an unprompted line about how your tool changed their week. These are testimonials — real, specific, publicly stated — and most companies scroll past them, reply with a heart emoji, and let them sink into the feed forever.
That is a waste. A comment written in public, without any incentive, is exactly the kind of genuine proof that a manufactured testimonial can never match. The person chose to say it where their own network could see. Turning that comment into a featured testimonial is one of the cheapest, most authentic sources of social proof available — if you handle the permission and attribution with the same care you would give a formal request.
Watch your comment threads like a proof pipeline
The raw material only helps if you actually collect it. Most praise on LinkedIn appears in three places: replies to your own posts, comments on posts where a customer mentions you unprompted, and threads where someone tags a peer to recommend you. Make scanning these a routine, not an accident. Whenever you or a teammate posts, revisit the thread a day later and flag any comment that names a concrete outcome. When someone tags your company in their own post, read the whole thread — the best line is often three replies deep.
Keep a simple running file of these comments the way you would keep a pipeline of any collected testimonial. A screenshot with a link back to the original comment preserves both the words and the proof that a real person said them.
Prize specificity over enthusiasm
Not every kind comment makes a good testimonial. "Love this!" is nice and useless — it could be about anything. The comments worth featuring name a problem, a change, or a number: "we replaced three tools with this," "our close went from two days to two hours," "I was skeptical about the migration and it took an afternoon." Sort the thread by substance, not by how flattering it sounds. A measured comment that describes a real result out-persuades an excited one that says nothing, because it reads as honest rather than performative.
Pay special attention to comments that answer the objection your prospects raise most. If buyers hesitate over switching costs, a comment that says "the migration I dreaded took one afternoon" is worth more than a dozen generic compliments — it speaks directly to the fear standing between a reader and a decision.
Ask permission, even though it is public
A public comment is visible to everyone, but that does not mean the author agreed to appear in your marketing. Lifting their words onto your landing page as an endorsement is a different act from them replying to a post, and treating the two as the same is how you burn a happy customer. Adopt a simple default: ask before you feature. A short direct message works — "thank you for the generous comment on my post; would you be comfortable with us featuring it on our website, with your name and title?" It keeps you clearly inside the lines, gives the commenter control, and often turns a casual supporter into an engaged advocate who is flattered to be asked.
If you cannot get a reply, do not quote them on your own page as if they endorsed your ad. Instead, link to the original comment where it lives in context on LinkedIn. The persuasive value is slightly lower, but you keep your credibility intact and avoid a quote the author never agreed to see repackaged.
Edit for clarity, never for meaning
Comments are written fast, so they often contain a great sentence wrapped in a typo or a rambling aside. You may tighten — fix an obvious spelling slip, trim an unrelated tangent, cut filler — but never change what the person meant or stitch phrases together to manufacture praise they did not give. Use an ellipsis to show where you cut. When in doubt, show the commenter your edited version and let them approve it; the same person who praised you publicly will rarely object to a faithful trim, and their approval removes any risk that the quote feels doctored.
Attribute it to a real, identifiable person
LinkedIn has a quiet advantage over most review platforms: every commenter comes with a real name, a job title, a company, and usually a photo. That is the exact attribution that makes a testimonial believable. When you ask permission, confirm how they want to be credited and use it fully — name, role, and company turn a floating quote into a vouching from a person a reader can look up. Respect whatever limit they set; a commenter who agrees to "first name and industry" has still given you usable proof, and pushing for more risks losing it.
Put the quote where the decision happens
A converted comment only works if it sits where a buyer is hesitating. Move your strongest, permissioned quotes out of a buried testimonials page and onto the pages where doubt peaks — beside pricing, next to the signup button, on the feature page that addresses the objection the quote answers. Thoughtful placement on your landing page is what turns a nice screenshot into a conversion. The commenter already did the hard part by vouching for you in public; your job is to put those words in front of the next person with the same problem they described.
Every unprompted comment praising your product is a customer who already endorsed you where their own network could see. Watching your threads, choosing the specific ones, asking permission, editing honestly, and attributing them to real people turns that scattered goodwill into a library of proof you can feature anywhere. The praise has already been earned in public — the only question is whether you let it keep working for you.