How to find who engages with a competitor’s LinkedIn posts
Short answer
Open the competitor’s LinkedIn post, click the reaction count, and LinkedIn opens the list of people who reacted. Then read the comments beneath the post; comments show the commenter’s name and headline, and you can open the person’s profile from there. For one post or a small manual check, this is often the right method. It stops working well when you need the same competitor pages or profiles checked repeatedly, because the work is post-by-post and your list only exists if you record it.
How to do it manually in LinkedIn
Start with the post, not the company.
- Open a post on the competitor’s company page, or on a person’s profile at that company.
- Click the reaction count on the post to open the list of people who reacted.
- Scroll the reaction list and open profiles that look relevant.
- Read the comments under the post; each comment shows the commenter’s name and headline.
- Copy the names, profile URLs, and any notes you care about into your own spreadsheet or CRM.
This is the cleanest first pass because it shows the actual people engaging with a specific post. It is also useful for qualitative review: comments tell you more than a list of names.
The limits of the manual approach
Manual review is post-by-post. If you check five posts, you repeat the same click, scroll, open-profile, and copy process five times.
It also does not create a durable history by itself. LinkedIn shows reactions and comments on the post, but your own record only changes when you go back and update it. If someone reacts to an older post after you checked it, your spreadsheet will not know unless you revisit that post.
The other limit is structure. Reaction lists and comment threads are LinkedIn interface views, not a filtered lead list. If you want to sort people by job title, company, company size, industry, country, or email availability, you need a separate workflow after you collect the names.
What changes when you need it running continuously
When competitor engagement becomes a recurring sales or research motion, the unit of work changes. Instead of inspecting one post at a time, you monitor the LinkedIn profiles or company pages that matter and collect engagement as it appears over time.
Cornersight is built for that version of the workflow: you paste a LinkedIn profile URL for a person or a company page, and Cornersight watches that profile’s posts. It captures everyone who liked or commented on those posts, and the capture refreshes daily, so new engagement on older posts is picked up too.
Captured people are enriched with name, job title, company, company size, industry, country, and, where available, a work email. After that, you can filter by ICP and push the results where you work through webhooks, CSV export, or the API.
No LinkedIn account connection is required to capture engagement in Cornersight. A connected LinkedIn sender is only required if you use the optional outreach and campaign features.
When the native method is enough
Use LinkedIn directly when you only need to inspect a small number of posts, understand who is commenting, or read the substance of the discussion. If you are validating whether a competitor’s audience is relevant at all, manual review is a better first step than setting up a system.
The native method is also enough when you do not need a reusable list. If the task is simply “who reacted to this post?”, LinkedIn already shows you that list from the reaction count.
When to set up tracked capture
Set up tracked capture when the same competitor pages, executives, partners, or category voices are worth checking repeatedly. That is the point where the manual method starts to lose context: new engagement can appear on older posts, and your team may need the people in a format it can filter, enrich, export, or route into another system.
A practical workflow is: review manually first, decide which profiles or company pages are worth watching, then track engagement continuously only for those sources.