How to Track Reactions to a Product Launch on Reddit, X, and Hacker News

Why launch day is different

Most social listening runs in the background. You check a digest, reply to a few posts, and move on. A launch squeezes weeks of conversation into a day or two, and the window to reply is short.

Hacker News is the clearest example. A Show HN post lives or dies on the front page in its first few hours, and the questions in the comments are what decide how the thread reads. If the founder answers the "how is this different from X?" comment in ten minutes, it sets the tone. If it takes three hours, someone else answers for you.

So the goal for launch week is speed and coverage. The report can wait. You want every mention in front of the person who can reply, while replying still matters.

Pick your keywords a week before

Keywords are where most launch monitoring goes wrong, and it's easier to fix them before the day than during it. I'd write four groups.

The first is the product and company name, plus the common misspellings. If your product is called a common word, pair it with something that narrows it down. In KWatch, a comma between words means all of them must appear, so acme, sync only matches content that contains both.

The second is the launch itself: the feature name, the campaign hashtag, and the URL of your launch page or Product Hunt listing. People paste links more often than you'd think, and a URL is about as precise as a keyword gets.

The third is your category phrased the way buyers say it ("tool to sync notion and airtable"). These catch people who heard about the launch secondhand and can't remember the name.

The fourth is competitors' names next to yours. An acme, competitorname alert surfaces the comparison threads, which are usually the ones worth answering first.

Then add excluded keywords for the obvious noise. Content is dropped if any one of your excluded keywords is found, so a short list like hiring, job, giveaway goes a long way. You can also exclude your own team's accounts with Excluded Users, so you don't get pinged for your own launch posts. Filtering needs the Essential plan or above.

How fast will alerts arrive?

Before you promise the team "we'll see everything in real time", check what each platform allows. These are the refresh rates from our docs:

Hacker News is the fast one, which is lucky, because it's where speed matters most on launch day. Reddit can lag by up to an hour, so for a big subreddit launch post I'd still keep that one thread open in a tab and let the alerts catch everything else.

Coverage has edges too. On Linkedin we monitor posts but not comments, and on Youtube we match titles and descriptions, not what's said in the video. We don't monitor Instagram, TikTok, or Bluesky at all, so if your launch audience lives there, you'll need something else for those channels.

Route alerts on launch day

Once the keywords are in, decide where the alerts go. Email works on every plan, but on launch day a shared Slack channel is better because the whole team sees each mention and can claim it with an emoji.

Each alert can have its own Slack webhook (Business plan and above), so I'd split them. Name and launch-URL alerts go to #launch-mentions, where the founder and support are watching. Competitor comparison alerts go to the same channel or a separate one for whoever owns positioning. Category alerts can go to sales, since those are often people still shopping.

The AI sentiment tag on each alert helps the team triage. A negative mention on Hacker News in hour one goes to the top of the pile. A positive tweet can wait for a like and a thank you later in the afternoon. Sentiment is measured toward your keyword and sarcasm still fools it sometimes, so treat it as a sorting hint and read the post before reacting.

If you want a log of everything for later, add an API webhook on the same alerts and send it to Zapier or n8n. Each match arrives as a small JSON payload like this one:

{
  "platform": "hackernews",
  "query": "Keywords: acme, sync",
  "datetime": "05 Nov 26 14:12 UTC",
  "link": "https://news.ycombinator.com/item?id=...",
  "author": "jdoe",
  "content": "Tried the Acme sync this morning, the setup was quick but it choked on a 10k row table.",
  "sentiment": "negative"
}

A Catch Hook trigger in Zapier and a Google Sheets "Create Spreadsheet Row" step is enough. Map platform, datetime, link, content, and sentiment to columns. Our Zapier and n8n guide covers the webhook part step by step.

Use it after the launch

The sheet is what makes launch monitoring worth more than a busy day. A week later, you've got every public mention in one place, with the platform and sentiment next to it.

A few things are worth pulling out. Count mentions per platform, because it tells you where your launch actually traveled (sometimes it's a subreddit nobody had planned for). Read the negative ones together, since three people hitting the same bug should jump the queue. And copy the phrases people used to describe the product, which are often better than the ones in your launch copy.

Then trim the alerts down. Launch keywords like the campaign hashtag can go. The name, competitor, and category alerts are worth keeping, and they become your normal background listening.

If some of the people who reacted are prospects or customers you want to follow closely, our sibling product MultiFollow.io tracks what specific people post on Linkedin and X, which is a different setup from keyword alerts.