The single highest-leverage compounding sourcing method is the post monitor. Set it up once, the tool re-scrapes a target post on schedule, captures every new commenter, and adds them to a running list. Wake up Monday with fresh warm leads from the previous week's engagement.
What a post monitor actually is
A normal extraction is a snapshot. You open a post, capture the people who engaged with it, and that is the end of it. Anyone who comments the following week is invisible to you unless you remember to go back.
A monitor turns that snapshot into a subscription. You point it at a post once, and it keeps checking, capturing new engagers as they arrive. The difference matters most on posts that keep attracting engagement for weeks, which is exactly the kind of post worth targeting.
The practical effect is that a good monitor on the right author quietly builds you a list of everyone in your market who engages with that topic, without you doing anything after setup.
Which plan you need
Post monitors are one of the eight sourcing methods, and scheduled sourcing sits on the higher plans. Being clear so you are not surprised at checkout:
- Free and Basic. Manual capture. Open a post, import the commenters or reactors, export the CSV. You can absolutely do this repeatedly by hand, it just costs you the time.
- Starter. Adds multi-step campaigns, the unified inbox and the Kanban pipeline, so the leads you capture have somewhere to go.
- Diamond Pro. Adds auto-sourcing across all eight methods. This is where monitors run on a schedule without you.
- Diamond Plus. Adds Post Spy for competitor post monitoring, plus Signal Radar.
If you are unsure whether this technique works for your market, do it manually on the free plan first. Re-checking one post every Monday for a month tells you whether the audience is worth automating, and it costs nothing to find out.
Choosing what to monitor, in order of value
The author you pick determines the entire quality of the output, so this is where the thinking belongs.
- Competitor founders and their teams. The single best target. People engaging with a competitor's content are in-market for your category by definition, and they have already demonstrated they will engage with content like yours.
- Niche practitioners rather than general influencers. An author with 4,000 engaged followers in your exact space beats one with 200,000 mixed followers. Big accounts attract engagement farmers and job seekers.
- Consistent posters. A monitor on someone who posts once a quarter is a monitor doing nothing. Weekly or better is the threshold.
- Evergreen topics over launches. A launch post spikes and dies. A post about a recurring problem in your market keeps collecting people for months.
How many monitors, and on whom
More is not better. Every monitor produces a stream you then have to act on, and an unworked stream is just a bigger backlog. Three to five well-chosen authors generate more usable pipeline than twenty scattered ones, because you can actually follow up on what they produce.
A workable starting set: two competitors, two respected practitioners in your niche, and your own best-performing post. Run that for a month, see which produces replies, and drop the rest.
What goes wrong
- Monitoring the wrong side of the market. If you sell to sales teams, monitoring sales influencers gets you other sales people, many of whom are peers rather than buyers. Monitor the authors your buyers read, not the ones your industry reads.
- Letting the list pile up. The value is speed. A commenter contacted a month later is a cold lead with an awkward opening line.
- Contacting everyone. Filters exist for a reason. Unfiltered monitors burn your weekly invitation allowance on people who were never prospects.
- Reusing the same reference too often. If you monitor one author heavily, some people will receive several messages from you referencing several of their posts. That reads as surveillance rather than attention.
Privacy and GDPR
Comments and reactions are public. Anyone can open the post and read the same list without any tool. A monitor automates checking, it does not access anything private, and neither the author nor the commenters are notified.
Under GDPR, contacting a professional about their professional role can rest on legitimate interest, provided you say who you are, are honest about how you found them, and stop when asked. Mentioning the post handles the second point in one line. Data is processed on EU infrastructure and your prospects stay in your own account.
Why post monitors compound
- Set once, harvest forever. No daily manual work after setup.
- Catches new commenters as they engage. Window stays warm.
- Layered with other sourcing. Plus signals + plus events = continuous lead pipeline.
- Hard for competitors to copy. They'd need to know which posts you're monitoring.
Step-by-step
Step 1: Pick the right posts to monitor
Criteria:
- Author posts frequently (weekly+) with consistent high engagement
- Audience matches your ICP
- Posts get 100+ comments (volume to harvest)
- Topics stay evergreen (not one-off launches)
Best targets: competitor founders, B2B thought leaders in your space, industry journalists, well-known agency owners.
Step 2: Open the post in Chrome
Click into the specific post you want to monitor. URL must include `/feed/update/`.
Step 3: Click Leadsforlinked, choose "Set up monitor"
The extension prompts you for monitoring frequency: daily, every 3 days, or weekly. Weekly is the sweet spot for most B2B use cases (less LinkedIn API pressure, still catches commenters within outreach window).
Step 4: Configure filters at setup
Set the filters once: job title, company size, location, seniority. New commenters matching your filters get auto-tagged for outreach. Anyone outside your ICP gets silently filtered.
Step 5: Connect to a campaign (optional, Diamond Pro+)
If you have Diamond Pro, link the monitor to a LinkedIn campaign. New commenters automatically enter your sequence. Fully autopilot.
Step 6: Check weekly and harvest
Every Monday, check the dashboard. New commenters from the last 7 days are listed. Send connection requests with personalized references to the post.
Recommended monitoring targets by industry
| Your industry | Profiles to monitor |
|---|---|
| B2B SaaS sales tools | Toinon Georget (Waalaxy), Brice Maurin (LGM), Guillaume Moubeche (Lemlist), JB Jézéquel (Evaboot) |
| Recruiting tools | Lou Adler, Glen Cathey, Hung Lee |
| Marketing tools | Rand Fishkin, Justin Welsh, Emma Stratton |
| French B2B | Stan Leloup, Benoît Dubos, Toinon Georget |
Set up your first 3 monitors.
Post monitor available from Starter tier. The free plan gives 100 leads on signup, no card.
Start freeFAQ
How often should monitors run?
Weekly is optimal. Daily creates more noise; less frequent risks missing the warmth window.
Can the monitored author detect monitoring?
No. Monitoring scrapes the public commenters list, same as a manual visit. The author sees normal traffic.
What plan do I need for monitors?
Manual capture works on every plan, including the free one. Scheduled auto-sourcing across all eight methods, which is what runs monitors for you, starts at Diamond Pro. Diamond Plus adds Post Spy for competitor post monitoring.