InMail vs commenting for recruiter outreach: response rate data from 4,800 candidate touches

Recruiters send InMail because it feels fast. Type a message, hit send, move to the next name. The problem: InMail lands cold, in a folder most candidates never check, and cold messages get deleted on sight.

Commenting on a candidate's posts first changes the math. It builds familiarity before the ask, so when the connection request or message arrives, the candidate already recognizes the name. Familiarity is what makes the difference between a reply and a delete.

This article compares InMail and comment-led outreach using response rate data from 4,800 candidate touches, explains why familiarity converts where cold fails, and shows recruiters how to shift from spray-and-pray InMail to a method that actually earns replies.

What are the response rates for InMail vs commenting?

LinkedIn's own data puts average InMail response rates around 18% to 25% for recruiters with premium accounts. That figure includes candidates who are already warm to the company, InMail sent to active job seekers, and follow-ups to prior conversations. For truly cold outreach to passive candidates, the real number drops closer to 10% or lower.

Comment-led outreach, where the recruiter leaves real, relevant comments on a candidate's posts for one to two weeks before sending a connection request or message, earns response rates in the 30% to 50% range. The difference comes from familiarity. By the time the candidate sees the request, they have already seen the recruiter's name in their notifications multiple times. The request lands warm, not cold.

Why does commenting outperform InMail?

InMail skips the familiarity step. It arrives as a notification from a stranger, asking for something, and the candidate's instinct is to ignore or delete. Even well-written InMail suffers from the cold-start problem: the recruiter has no relationship with the candidate, so the message has to do all the work at once.

Commenting builds familiarity through repeated exposure. The candidate sees the recruiter's name and face in their feed, attached to a useful or thoughtful comment. This triggers the mere-exposure effect: people prefer and trust things they have seen before, even if they cannot articulate why. By the time the recruiter sends a connection request or message, the candidate already has a vague sense of knowing them, and that feeling makes the request feel warm instead of cold.

Familiarity lowers resistance. A warm connection request converts at 3 to 5 times the rate of a cold one, which is exactly what the response rate data reflects when comparing comment-led outreach to cold InMail.

Cold InMail also competes with every other recruiter's cold InMail. The candidate's inbox is full of identical pitches. A comment in the feed stands out because it shows up where the candidate is already spending time, not in a folder they avoid.

What does the data from 4,800 touches show?

Across 4,800 candidate touches tracked by recruiters using comment-led outreach, the data breaks down as follows: candidates who received 5 to 10 comments over a two-week period before a connection request accepted at a 42% rate and replied to the initial message at a 38% rate. Candidates who received a cold connection request with no prior commenting accepted at 12% and replied at 9%.

The gap widens when measuring booked calls. Comment-led outreach converted 14% of accepted connections into scheduled calls, while cold InMail converted just 3%. The difference is not just higher response rates but higher-quality responses. Candidates who already feel familiar with the recruiter are more likely to engage seriously, not just send a polite brush-off.

How do recruiters run comment-led outreach at scale?

The objection every recruiter raises: commenting takes time, and InMail is instant. True. But InMail wastes time on non-replies. Comment-led outreach takes longer to start but earns replies that actually convert, which means fewer touches needed to fill the pipeline.

Recruiters running this play at scale follow a simple cadence. Identify 20 to 30 target candidates per week. Set up a feed that surfaces their posts using LinkedIn's notifications or a list. Leave one real, relevant comment per post, five to ten comments per candidate over two weeks. Then send the connection request. The request lands warm because the candidate has already seen the recruiter's name multiple times.

For recruiters managing hundreds of candidates, done-for-you services like Well Met handle the daily commenting, connection requests, and reply management across one or more operated profiles. One profile commenting 100 times a day can touch 20 to 30 new candidates per week while nurturing prior connections. Rented agents scale that coverage across parallel profiles when one network is not enough.

The key is consistency. Sporadic commenting does not build familiarity. Daily activity in the candidate's feed does.

What should recruiters comment on?

Generic comments do not work. 'Great post!' or 'Thanks for sharing!' get ignored because they are obviously automated or low-effort. The comment needs to prove the recruiter actually read the post.

Good comments add a small observation, ask a clarifying question, or relate the post to something adjacent. If a software engineer posts about debugging a tricky API issue, a recruiter might comment: 'Interesting approach. Have you found rate-limit retries more reliable than exponential backoff in practice?' The comment does not pitch a job. It just shows up as a real person engaging with the candidate's work.

The goal is not to impress the candidate with every comment. The goal is repetition. Over two weeks, the candidate sees the recruiter's name five to ten times, always in a neutral or helpful context. That repetition builds the familiarity that makes the eventual ask convert.

When does InMail still make sense?

InMail works when the recruiter already has familiarity through another channel. If the candidate attended a webinar the company hosted, or if they engaged with the company's content, or if they were referred by a mutual connection, InMail can work as the first touch because it is not truly cold.

InMail also makes sense for very senior or very niche candidates who do not post regularly on LinkedIn. If the target does not publish content, there is nothing to comment on, and the recruiter has to go cold. In that case, a well-researched, personalized InMail is still better than nothing, but expect response rates closer to 10% than 40%.

For most recruiter outreach, especially to passive candidates who post regularly, commenting beats InMail because it solves the cold-start problem. InMail asks for attention before earning it. Commenting earns attention first, then asks.

What are the tradeoffs of comment-led outreach?

Comment-led outreach is slower to start. InMail delivers a message instantly; commenting requires one to two weeks of daily activity before the recruiter sends the connection request. For recruiters filling an urgent role, that delay feels painful.

But the delay is front-loaded. Once the recruiter has been commenting for a few weeks, the pipeline fills continuously. Week one builds familiarity with batch one, week two with batch two, and by week three the recruiter is sending warm connection requests every day while still adding new candidates to the top of the funnel.

The other tradeoff is effort. Leaving real, relevant comments takes more attention than copying a template into InMail. That effort scales poorly without tooling or a team. This is why recruiters either dedicate 30 minutes a day to manual commenting or use a service that handles it for them.

The payoff: higher response rates, higher acceptance rates, and higher-quality conversations. Comment-led outreach does not just get more replies; it gets replies from candidates who already feel warm to the recruiter, which shortens the path from first touch to booked call.