Short answer: Reddit has no keyword alerts, so nothing native can post to Slack. The free route is F5Bot emails forwarded into a Slack channel's email address. It works, but every match lands unfiltered. Syften sends Reddit alerts straight to Slack from its $49.95 Standard plan. Updately sends Reddit alerts to Slack, Discord or email, scores each one for relevance and sentiment, and adds LinkedIn and X in the same tool from $49/month ($39/month billed annually). Step-by-step setups for each are below.
Table of Contents
- Can Reddit send keyword alerts to Slack?
- Reddit to Slack options compared
- Option 1: F5Bot emails forwarded into Slack (free)
- Option 2: Syften
- Option 3: Updately
- Other routes: F5Bot Gold, KWatch.io, RSS
- Choosing keywords for a Slack channel
- Filtering the noise
- FAQ
Can Reddit send keyword alerts to Slack?
No. Reddit notifies you about replies to your own posts and comments, and about the users and communities you follow. It has no way to tell you that someone, somewhere on Reddit, just wrote your brand name, a competitor's name or "looking for a tool that…". There's no official Reddit app for Slack that does this either.
So every Reddit-to-Slack setup has two parts:
- Something that watches Reddit for new posts and comments containing your keywords.
- A delivery path into Slack, Discord or email.
Some tools do both. The free route stitches two tools together. For a wider look at the alert tools themselves, see the best tools for Reddit alerts.
Reddit to Slack options compared
Prices are list prices from each vendor's site in October 2026.
| Option | Cost for Slack delivery | Discord | Relevance filtering | Comments too | Other platforms |
|---|---|---|---|---|---|
| F5Bot free + email forwarding | Free (needs a Slack plan with channel email) | Via Zapier or similar | No | Yes | Hacker News, Lobsters |
| F5Bot Gold | $49.99/mo | Yes | AI filtering | Yes | Hacker News, Lobsters |
| Syften Standard | $49.95/mo | Not listed | AI filtering | Yes | HN, Bluesky, forums, GitHub; X as a +$40 add-on |
| KWatch.io Business | $79/mo | Not listed | Yes | Not listed | HN, X, YouTube, LinkedIn, Facebook |
| Updately Starter | $49/mo ($39 annual) | Yes | AI relevance + sentiment | Yes | LinkedIn, X, Bluesky, Hacker News |
| Reddit RSS + Slack | Free | Via Zapier or similar | No | No (posts only) | — |
Option 1: F5Bot emails forwarded into Slack (free)
F5Bot emails you when your keywords appear in new Reddit posts and comments. Its free plan is email only, but email is enough to reach Slack.
- Create an F5Bot account and add your keywords. Start with three to five (your brand, one competitor, one category phrase).
- Get an email address for your Slack channel. On paid Slack plans, a channel can be given its own address: open the channel's details, go to Integrations, and look for the option to send emails to the channel. Check your workspace settings, since admins can turn this off.
- Forward F5Bot's alerts to that address. In Gmail or Outlook, create a filter for emails from F5Bot and set it to forward automatically to the channel address. Confirm the forwarding address when your mail client asks.
- For Discord, there's no email-in address, so use an automation tool (for example a Zapier zap from "new email matching a search" to "send channel message") to repost each alert.
- Test it by adding a keyword that appears on Reddit every few minutes, wait for a message, then delete it.
What you get: free Reddit alerts in a channel within minutes of a post.
What you don't get: any filtering. Every keyword match becomes a Slack message, and the free plan includes a snippet rather than the full post (full text needs Silver at $9.99/month). On busy keywords the channel gets muted within a week. That's the main reason people move on; see F5Bot alternatives.
Option 2: Syften
Syften watches Reddit along with Hacker News, Bluesky, forums, Stack Exchange and GitHub, and typically alerts within about a minute. Its filter syntax is the most precise of the alert tools: exact phrases, exclusions and subreddit scoping.
- Pick a plan with Slack. Entry ($29.95/month, 3 filters) is email. Slack and AI filtering arrive on Standard at $49.95/month with 20 filters. Webhooks are on PRO at $119.95/month.
- Write a filter per intent, for example your category phrase scoped to the subreddits your buyers use, with job-post words excluded.
- Connect Slack and choose the channel.
- Review after a few days and tighten any filter that sends more noise than signal.
Choose it if Reddit and developer communities are where your buyers talk and you want speed. It doesn't cover LinkedIn, and X costs an extra $40/month.
Option 3: Updately
Updately's social listening streams Reddit in real time and scores every matching post and comment with AI for relevance and sentiment, so "can anyone recommend an alternative to [competitor]?" is ranked above an off-topic joke that happens to use the same word.
- Create a listener with your keywords. You can include or exclude subreddits.
- Turn on alerts to Slack, Discord or email. All three are on every plan.
- Add LinkedIn and X to the same listener if your buyers are there too. LinkedIn and X are scanned hourly; Reddit and Bluesky stream in real time. Every platform is included on every plan.
- Act on the alert. Reply on Reddit yourself, or push a high-intent mention into a signal so the person is researched and contacted on LinkedIn.
You can also skip the dashboard. Add https://api.updately.ai/mcp as a custom connector in Claude and ask "What did people say about [competitor] on Reddit this week?" Claude calls Updately's fetch_posts tool and answers from your monitored posts. Setup is in the MCP docs.
Price: Starter is $49/month ($39/month billed annually) with 10 tracked terms and 3 listeners. Growth is $99/month ($79 annually) with 30 terms, 10 listeners, webhooks and CSV export. Full details are on the pricing page.
Choose it if you're a B2B team and a Reddit mention should turn into a conversation, not just a notification. If you only need to know when your brand name appears, F5Bot is cheaper.
Other routes: F5Bot Gold, KWatch.io, RSS
- F5Bot Gold ($49.99/month) adds native Slack and Discord delivery, 200 keywords, AI filtering and RSS/JSON feeds. It replaces the forwarding setup above.
- KWatch.io Business ($79/month) adds Slack, webhooks and an API, with 100 Reddit keywords. Its cheaper plans are email only.
- Reddit search RSS. A feed like
https://www.reddit.com/search.rss?q="your brand"&sort=newcan be added to Slack's RSS app or a Zapier RSS-to-Slack zap. It covers posts, not comments, and has no filtering. Fine for one exact brand name, not for intent phrases. - Octolens posts Reddit mentions to Slack with AI relevance tags, from $159/month billed annually, refreshing hourly on that plan. See Octolens alternatives.
Choosing keywords for a Slack channel
A Slack channel can take far fewer alerts than an email inbox. Pick keywords with that in mind.
| Keyword type | Example | Send to |
|---|---|---|
| Brand | updately, misspellings, product names | Real-time Slack |
| Competitor + switching | "switching from [competitor]", "[competitor] alternative" | Real-time Slack |
| Category + intent | "looking for" social listening tool, "recommend a" CRM | Real-time Slack |
| Problem phrases | "how do I find leads on reddit" | Daily email digest |
| Competitor name alone | [competitor] | Daily email digest |
Three rules help:
- Phrases, not single words. "Pipeline" alone matches plumbers and data engineers. "Sales pipeline tool" doesn't.
- Write the way buyers write. Reddit users say "anyone used…" and "what do you use for…", not your homepage tagline.
- Scope noisy terms to subreddits. A category word may be useless site-wide but valuable in r/sales or r/SaaS.
More phrase ideas are in how to find people asking for tool recommendations.
Filtering the noise
Most Reddit-to-Slack channels die of noise, not missed mentions. To keep yours alive:
- Use exclusions.
"social listening" -job -hiring -interncuts recruiting posts. - Filter on relevance, not just keyword match. AI relevance scoring (Updately, Syften Standard, F5Bot Gold, Octolens) drops off-topic matches before they reach the channel.
- Use sentiment for brand terms. Negative brand mentions go to the channel your support or marketing lead watches. Neutral ones can wait for a digest.
- Split channels by owner.
#reddit-leadsfor sales,#brand-mentionsfor marketing. A channel nobody owns gets muted. - Prune weekly. Delete any keyword that produced nothing you acted on in two weeks.
For routing across platforms, see real-time social listening alerts.
FAQ
Is there a Reddit app for Slack that sends keyword alerts?
Not from Reddit. You need a monitoring tool (F5Bot Gold, Syften Standard, KWatch.io Business, Octolens or Updately) or a forwarding setup from F5Bot's free email alerts.
What's the cheapest way to get Reddit alerts in Slack?
F5Bot's free plan with email forwarding into a Slack channel address, if your Slack plan supports channel emails. Of the tools with built-in Slack delivery, Updately at $39/month billed annually and Syften Standard at $49.95/month are the lowest, with F5Bot Gold at $49.99/month.
Can I get Reddit alerts in Discord?
Yes. F5Bot Gold and Updately post to Discord directly. With other tools you can forward email alerts to Discord through an automation tool.
Do Reddit alerts include comments?
With F5Bot, Syften and Updately, yes. Reddit's search RSS feeds cover posts only.
Can I get LinkedIn and X alerts in the same Slack channel?
Yes, with Updately, which monitors LinkedIn, X, Reddit, Bluesky and Hacker News in one listener. See LinkedIn keyword alerts and Twitter keyword alerts.
Want Reddit alerts in Slack that are already sorted by relevance? Start free with 800 credits, no card required. Related: what social listening tools actually cost in 2026 and the best social listening tools for 2026.