For a free DIY approach, Reddit's own JSON API is surprisingly useful. Just append .json to any search URL like reddit.com/r/SideProject/search.json?q=keyword&sort=new&t=day and you get structured results. Combine that with a simple cron job or even a Google Apps Script, and you have a basic monitoring setup for $0. For something more polished, F5Bot is completely free — it emails you whenever your keywords are mentioned across Reddit. No frills but it works. If you need more features like lead scoring or AI-drafted replies, the paid tools others mentioned are worth looking at. But honestly for most side projects, F5Bot + manual checking has been enough for me. Answer from Educational-Solid686 on reddit.com
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RedditAlert
redditalert.com
RedditAlert: Never miss what matters on Reddit
Receive real-time alerts from Reddit posts and comments triggered by AI prompts, regex rules and boolean queries.
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Alertsforreddit
alertsforreddit.com
Alerts For Reddit: A Mobile App
Receive notifications for your favorite Reddit subreddits.
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GitHub
github.com › JoshuaTLand › redditAlert
GitHub - JoshuaTLand/redditAlert: A Python Bot That Sends Top Posts Via Discord · GitHub
A Python Bot That Sends Top Posts Via Discord. Contribute to JoshuaTLand/redditAlert development by creating an account on GitHub.
Author   JoshuaTLand
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Reddit
reddit.com › r/growthhacking › keyword alerts probably send you 90% noise and you just stopped reading them
r/GrowthHacking on Reddit: Keyword alerts probably send you 90% noise and you just stopped reading them
February 17, 2026 -

Most social listening tools work the same way: enter keywords, get a feed of every post that mentions them. The problem isn't that they don't work. The problem is what happens next.

You set up "CRM software" and start getting results. A developer tutorial. A "best CRM software 2025?" listicle someone wrote for SEO. A certification question. Three posts about Salesforce internships. To then shortly start skimming the emails. And then starting to ignore them entirely.

Meanwhile, the post you actually wanted, "HubSpot is charging us $1,200/mo and we use maybe 20% of it", never triggered your alert because it doesn't contain "CRM software."

This is the core gap with keyword matching: keywords match words, not intent. You either get noise for broad terms or miss important posts because people describe their problems without using your category label.

Not many services make it possible to match on what people mean in addition to what they write. I built RedditAlert specifically for this. You can write AI prompts like "small business owners frustrated with their current CRM and considering switching" alongside keywords. The AI reads the post and decides if the intent matches, not just the words.

I just published a detailed comparison of keyword matching vs intent matching with real examples that might be useful:

Reddit Keyword Alerts: RedditAlert vs F5Bot

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Google Play
play.google.com › store › apps › details
Alerts for Reddit - Apps on Google Play
May 31, 2026 - Never miss a Reddit post again - get custom subreddit & user post notifications
Rating: 3.1 ​ - ​ 273 votes
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Redditalert
redditalert.com › blog › reddit-keyword-alerts-redditalert-vs-f5bot
F5Bot vs RedditAlert: Keywords Miss Most Reddit Mentions | RedditAlert
February 17, 2026 - F5Bot is email-only. RedditAlert has a web dashboard where you can review all matches, see why something matched (including the AI's reasoning), and refine your queries over time.
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Medium
medium.com › @ivanpalii › reddit-keyword-alert-tool-free-46e824f350d5
Reddit Keyword Alert Tool [Free!] | by Ivan Palii | Medium
March 29, 2026 - Reddit Keyword Alert Tool [Free!] This is a must-have tool if you’re serious about Reddit! Here is it >> F5bot. It’s free! Below is the guide on how to use it properly. Why is this alert tool so …
Find elsewhere
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App Store
apps.apple.com › us › app › alerts-for-reddit › id1208773745
Alerts for Reddit - App Store - Apple
1 month ago - Download Alerts for Reddit by Amanda O'Neal on the App Store. See screenshots, ratings and reviews, user tips, and more apps like Alerts for Reddit.
Rating: 4.2 ​ - ​ 174 votes
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YouTube
youtube.com › @redditalert6909
Reddit Alert - YouTube
Subscribe for the best Reddit content on YouTube
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Chrome Web Store
chromewebstore.google.com › detail › reddit-post-scrapper › bfecofhokehaehmfkcbccdabfddaoafg
Reddit Post Scrapper - Chrome Web Store
December 18, 2025 - Get Real-Time Reddit Alerts for Your Keywords. Reddit Post Scrapper (powered by Pulse of Reddit) is your ultimate real-time Reddit monitoring and keyword alert Chrome extension. Instead of endless scrolling, get instant ...
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Reddit
reddit.com › r › sto › wiki › redditalert
Star Trek Online
March 1, 2016 - r/sto redditalert · Open menu · View page history · View page source · Copy URL · REDdit ALERT & Reddit Star Empire Fleet Charter · What is REDdit ALERT & Reddit Star Empire? What's the difference between RA & RSE? General Fleet and Chat Guidelines · General Rules ·
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Reddit
reddit.com › r/saas › what's your go-to tool for monitoring reddit keywords?
r/SaaS on Reddit: What's your go-to tool for monitoring Reddit keywords?
June 26, 2025 -

I'm looking for a smart way to find relevant conversations here on Reddit without spending hours searching manually every time.

The goal is to get a daily digest of new posts/comments that match keywords related to my project (in the data/investing space).

I know there are SaaS tools, no-code platforms, and open-source scripts that can do this, but I'm looking for recommendations from people who are actually using them. What's your workflow? What's been effective for you?

Any hidden gems you'd recommend checking out?

Thanks!

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GitHub
github.com › BillyCurtis › OpenRedditSafariExtension
GitHub - BillyCurtis/OpenRedditSafariExtension: Displays an Open in Reddit alert for sideloaded Reddit App · GitHub
Displays an Open in Reddit alert for sideloaded Reddit App - BillyCurtis/OpenRedditSafariExtension
Starred by 22 users
Forked by 5 users
Languages   JavaScript 69.9% | HTML 15.1% | CSS 15.0%
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Reddit
reddit.com › r/rss › how can i get alerts when a certain keyword shows up on an a reddit?
r/rss on Reddit: How can I get alerts when a certain keyword shows up on an a reddit?
June 9, 2025 -

I have no idea how this works...

But RSS shows you the posts and comments in real time right?

I'm a web designer, and when people have tech questions, I want to answer right away.

I'm a Canadian living in Thailand, so when people have questions after hours and at night, I think I could be one of the first ones to answer.

Goal is not to sell immediately, but to build credibility in the communities.

Is RSS a good way to do this, and if so how?

Top answer
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RSS shows you the posts and comments in real time No. There are some RSS feeds that use WebSub protocol which can be served real-time, but for the most part, I'd say the majority are not like this. RSS isn't really for real-time stuff. This is 1000% true for Reddit, which seems to be rate-limiting their feed polling more and more. So in theory, yes, you could make a Reddit search feed to deliver keyword mentions (across the whole of Reddit or across your chosen group of subreddits) via RSS. But especially today, you'll be lucky if it updates more than 5 times a day or so. Many of my Reddit feeds update once every two days, thanks to Reddit's artificial rate limiting.
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You have a lot of options here. For simple keyword alerts: Octolens, Syften, RedditAlert, F5bot, even something like Alertmouse or Google Alerts will work. Of those, Octolens is a good option but on the pricer side for just keyword alerts. RedditAlert is decent and you can create several alerts for free. Though the monitoring is pretty basic: you have to select specific subreddits to monitor (can't monitor everything), no advanced filtering (like negative keywords, excluding subreddits, languages, etc.), and there's no historical data or analytics. F5bot is also free, but really bare bones, and the UI looks like it was made in the 90s. If you need something more advanced with historical data and deeper analytics (like Share of Voice, competitive benchmarking, advanced keyword filters, etc.), I would look at something like Threadlytics.io (which is Reddit-specific). Going beyond that, you're looking at enterprise social listening platforms like Meltwater, Brand24, etc., which cost tens of thousands per year and require annual contracts. I've been using Threadlytics for a few months. Overall, I like it. It's helped us find more relevant mentions, benchmark against competitors, and see if we're showing up more often on Reddit over time. If you have any questions on any of the above tools (I've tried them all and then some), feel free to ask!
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GitHub
github.com › JoshuaTLand › redditAlert › blob › main › README.md
redditAlert/README.md at main · JoshuaTLand/redditAlert
A Python Bot That Sends Top Posts Via Discord. Contribute to JoshuaTLand/redditAlert development by creating an account on GitHub.
Author   JoshuaTLand
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Instagram
instagram.com › popular › redditalert
Redditalert
March 23, 2026 - We cannot provide a description for this page right now
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Reddit
reddit.com › r › Reddilert
Reddilert - Instant alerts for Reddit
August 3, 2024 - Support, bug reports, and feature requests for https://reddilert.me