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Saniya
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Published September 8, 2026 · Updated September 8, 2026
The answer up front: everyone who likes or comments on a competitor's LinkedIn post is telling you, in public, that they care about exactly what you sell - and the lists are visible to anyone, because reactor and commenter lists on public posts are not private. Tracking them at scale takes a tool: Trigify (from $40/mo) is the purpose-built tracker, Clay pulls any post's audience into an enrichment table, PhantomBuster/TexAu export raw lists, and Valley (that is us) watches competitor audiences continuously and turns matches into researched, ready-to-approve outreach. The free manual method works too - it just does not scale past a few posts a week.
Disclosure: Valley (that is us) works this signal natively, so we are a vendor in this list. The comparison covers everyone honestly, including where a cheaper or narrower tool is the better fit.
How we know this: we run outbound for 1,000+ LinkedIn accounts and have sent 30M+ messages, most of them triggered by exactly these signals. Every tool fact below was verified September 8, 2026 against the vendor's live pages; every LinkedIn capability was checked against LinkedIn's own help documentation the same day.
Valley is an AI outbound platform that finds the people most likely to buy from you - from live buying signals, natural-language search, or your own lists - qualifies them against your ICP, researches each one, and sends personalized messages across email and LinkedIn that get 15-45% reply rates, against a category average of about 2%.
Why this beats almost every other prospecting source
A cold list tells you someone fits your ICP. A competitor engager tells you they fit AND they are actively paying attention to your category, this week. That combination - fit plus timing plus demonstrated interest - is why engagement-sourced outreach posts the reply rates it does (the one published case study: 28% replies; our 30M-message dataset: 15-45% on warm signals vs ~2% cold - methodology in the benchmarks report). It is also completely visible: you need no special access to see who reacted to a public post.
The tools that track it (verified September 8, 2026)
Tool | What it does with competitor posts | Price |
|---|---|---|
Trigify | The purpose-built play: track competitors' posts and topic keywords continuously; enriches engagers and routes to Slack, CRM, or your sender. Capture-only. | $40/mo (4,000 credits), $199/mo (40,000) |
Clay | Paste any post URL into 'Find Post Audience'; enrich; push anywhere. Per-post, not continuous. | Free tier; from $167/mo |
PhantomBuster / TexAu | One-off exports of likers/commenters from any post URL (~3,000/post cap). Can chain to auto-messaging - where the account risk concentrates. | $69+/mo · $79+/mo |
Common Room | Its Chrome extension captures engagement from any post; the platform is enterprise-priced. | $2,500/mo billed annually |
Gojiberry | Tracks competitor page/post engagement among its signals; no published pricing page. | Reported $99+/mo, unverified |
Valley (us) | Competitor audiences as a continuous signal source: engagers qualified against your ICP, researched across 200+ sources, outreach drafted in your voice - you approve every send. | $149/mo billed quarterly |
The manual method (free)
1. List 3-5 competitors and the 2-3 loudest voices at each (founder posts out-pull company pages).
2. Twice a week, open their recent posts, click the reaction counts, and log engagers who match your ICP - name, title, company, which post.
3. Prioritize commenters over likers (higher effort = stronger signal), and repeat engagers over one-timers.
4. Reach out about the TOPIC, not the competitor: "saw your take on X" opens doors; "I saw you follow our competitor" closes them. Never name the competitor in the first message.
Three rules that keep this classy (and effective)
Engage the idea, not the rivalry. The person cared about a problem, not a brand fight. Move within 48 hours - the engagement is a timestamp. Respect the rules: the lists are public, but automated scraping sits outside LinkedIn's User Agreement 8.2; manual is safe, tools are a sized risk, and volume that looks robotic gets accounts restricted regardless of the tool.
► Fit + timing + interest, watched continuously - you approve every send: Valley free for 7 days
How to choose in 30 seconds
A few posts a week: manual. Continuous tracking into your existing stack: Trigify. Ad-hoc enrichment: Clay. The whole loop - watch, qualify, research, write, approve: Valley. Related: messaging post engagers (the general playbook) · the best warm-outbound tools compared.
FAQ
Is it legal to see who engaged with a competitor's LinkedIn post? Seeing it is just using LinkedIn - reactor and commenter lists on public posts are visible to any member. Automated collection is what LinkedIn's terms prohibit. Manual logging is entirely safe.
Which tool is best for tracking competitor post engagement? Trigify is the purpose-built tracker (from $40/mo, capture-only). Valley is the option if you want the signal turned into researched, approved outreach rather than another list to work.
Should I mention the competitor in my outreach? No. Reference the topic they engaged with, never the surveillance. The signal buys you relevance; naming it spends the goodwill.
How fresh does the signal need to be? Days, not weeks. Engagement is a timing signal - the reply-rate advantage decays as the moment passes. Continuous trackers beat weekly exports for exactly this reason.
Does Valley track competitor audiences natively? Yes - competitor audiences are one of Valley's signal sources, alongside profile viewers, post engagers and followers. Matches get qualified against your ICP and researched before a word is written. 7-day free trial.
► They did the audience-building. You do the conversations: start free, see a reply this week
The full signal map: every B2B buying signal, ranked by distance from the buyer.
