How to find Reddit and LinkedIn threads worth commenting on

By James Taylor, founder of LaunchEngine · Updated October 23, 2026

A good comment on a post where someone is already asking for help gets read. A cold post in the same community usually doesn't. The hard part is finding those posts every day. Here is how to do it by hand, and which tools do it for you.

To find threads worth commenting on, describe the person you can help ("founders asking where to submit a new startup"), turn that into the words they would actually type ("just launched", "no traffic yet", "first paying customer"), search those phrases daily in your niche subreddits and LinkedIn, and skip posts that are hiring threads or job ads. Then comment only where you can add something useful without linking your product.

Step 1: describe who you are looking for

Keywords alone match too much. Start with up to five short descriptions of people you can help, written as what they are doing: asking how to get first users, struggling to get traffic after a launch, asking which tool to use for a job your product does. Those descriptions decide whether a post is worth a reply.

Step 2: turn that into search phrases

Write the words a real post uses, not your marketing words. Nobody posts "seeking a launch distribution platform". They post "launched last week, zero signups". Keep a list of 10 to 15 phrases and a short list of things to skip, such as hiring threads and job boards.

Step 3: search them every day

• →Reddit: search each phrase inside your niche subreddits, sorted by New. Threads older than a day or two rarely get read.
• →LinkedIn: search posts (not people) for the same phrases and filter to the past 24 hours.
• →Facebook groups and Instagram: search inside the groups and hashtags your buyers use. Neither has a good public search, so this is the slowest part by hand.

Step 4: comment like a person

Answer the question first. Mention your product only if it is the honest answer, say you built it, and follow the subreddit's self-promotion rules. One useful comment a day beats ten pasted ones; repeated near-identical replies are the fastest way to get an account flagged.

Tools that do the finding

LaunchEngine's Commenter runs this whole loop: you set the targets, skip list and keywords shown above, it searches Reddit, LinkedIn, Facebook groups and Instagram, and drafts a comment for each match with the reason it picked the post. You approve drafts one by one, or turn on auto-post with a daily cap per platform.

LaunchEngine Commenter

Tell it who you help. It finds the threads and drafts the comment.

• →Reddit, LinkedIn, Facebook groups and Instagram
• →You approve each draft, or switch on auto-post with a daily cap
• →Posts from your own browser and accounts

See the Commenter Creator plan, £29 / $39 / €35 a month