5 Best Reddit Alert Tools in 2026
If you only want Reddit alerts, F5Bot and Syften are the better picks. Five tools compared, with prices checked on 31 Oct 2026 and links.
We make FounderDive, and we list it first. Every other tool here is described from its own site, checked on 31 Oct 2026. Prices change; follow the links and check before you buy.
If all you want is an alert when a word shows up on Reddit, F5Bot is the best free option and Syften is the best paid one. Both have done this for years. You don't need anything else on this page.
We make FounderDive and list it first, but in fairness it is not an alert tool. It is for the step after the alert: deciding which posts are worth answering and writing the reply. Read its card with that in mind.
How we picked
- Sends Reddit alerts, or says plainly that it doesn't
- How fast, how many and where alerts go
- Price from the tool's own site, dated
1. FounderDive
Not an alert tool. For when reading alerts has become the slow part and you want the reply written.
- Price (as of 31 Oct 2026)
- Free first hunt; Starter $29.99/mo; Pro $79.99/mo
- Posts for you?
- No
Good at
- Looks in nine places, Reddit first, and keeps only posts that score 72 or more out of 100
- Writes each reply only from facts you gave it; a draft that can't cite one is thrown away
- Eight safety checks on every reply, including group rules, 9 helpful replies per 1 that mentions you, and a shadowban check
Watch out for
- Never posts for you, and some buyers want that. You press send from your own account
- No keyword or brand-mention alerts, no Slack, and X only through Google's index
- Young product with no public customer numbers; almost all kept posts come from Reddit
2. F5Bot
Free keyword alerts for Reddit, Hacker News and Lobsters.
- Price (as of 31 Oct 2026)
- Free; Silver $12.99/mo; Gold $49.99/mo; Platinum $214.99/mo
- Posts for you?
- No
Good at
- The free plan has no time limit: 5 keywords, 20 alerts a day
- Simple: a keyword in, an email out
- Covers Reddit, Hacker News and Lobsters
Watch out for
- Alerts only: no scoring, no replies, no safety checks
- Free alerts can arrive up to 2 hours late; it suggests Gold for business use
3. Syften
Fast keyword alerts across many sites, for people who already know how to reply.
- Price (as of 31 Oct 2026)
- Entry $29.95/mo, Standard $49.95/mo, PRO $119.95/mo; trial of 14 days, no card
- Posts for you?
- No
Good at
- Running since 2019; watches Reddit, Hacker News, X, Bluesky, Mastodon, Indie Hackers, Slack groups, Stack Exchange, YouTube, GitHub, DEV, podcasts and blogs
- Alerts usually within a minute, by email, Slack, RSS, API, webhook or MCP
- Shows the last 60 days of matches as soon as you sign up
Watch out for
- You write the filters, read every alert and write every reply
- No safety checks on replies; X and YouTube cost extra
4. Octolens
Teams that monitor a brand across social media, code sites and reviews.
- Price (as of 31 Oct 2026)
- Pro $159/mo and Scale $499/mo, both billed yearly; trial of 7 days, no card
- Posts for you?
- No
Good at
- Very broad: Reddit, X, LinkedIn, YouTube, TikTok, Bluesky, DEV, Hacker News, GitHub, Stack Overflow, reviews
- Alerts, an API and an MCP server
Watch out for
- Priced for teams, billed yearly, with charges for extra mentions and keywords
- Built to monitor, not to write replies
5. RedShip
A Reddit inbox with keyword and competitor tracking, Slack alerts and an MCP server.
- Price (as of 31 Oct 2026)
- Founder $29/mo; Company $49/mo; 7-Day Pass $12 one-time
- Posts for you?
- No
Good at
- Tracks your site, keywords and competitors on Reddit and suggests replies, with no limit on suggestions
- Email and Slack alerts, a REST API and an MCP server
- Weekly reports on Reddit posts that rank on Google and get cited by AI tools
Watch out for
- Reddit only
- No free plan or trial; the cheapest way in is the $12 pass
Questions
What's the best free Reddit alert tool?
F5Bot. Five keywords, up to 20 alerts a day by email, on Reddit, Hacker News and Lobsters, free with no time limit.
What's the fastest Reddit alert tool?
Of the tools here, Syften says it targets under a minute, with alerts by email, Slack, RSS, API, webhook or MCP. Entry is $29.95 a month (as of 31 Oct 2026).
Does FounderDive send Reddit alerts?
No. It looks for posts asking for what you built when you press Hunt, keeps the ones scoring 72 or more out of 100, and writes the reply. If you want alerts, use F5Bot or Syften.
Can I get Reddit alerts in Slack?
Yes, with Syften (Standard and up), RedShip or Octolens. F5Bot sends email. FounderDive has no Slack.