Reddit Keyword Monitoring

Set up real-time or near-real-time monitoring for keywords relevant to your product, competitors, and ICP pain points across Reddit. This fundamental covers three approaches ranked by reliability.

Option 1: Syften (Recommended for speed and coverage)

Syften monitors Reddit, Hacker News, X, Discourse, Slack communities, Stack Overflow, and more with ~1 minute delay.

Setup

1. Sign up at https://syften.com (14-day free trial, plans from $19.95/mo)
2. Create a "Project" for your monitoring campaign
3. Add keyword filters — these are the search queries Syften runs continuously

Configuring Filters

Create filters for each monitoring category:

Pain point keywords (what your ICP complains about):

Filter: "struggling with [problem]" OR "frustrated with [problem]" OR "looking for [solution category]"
Platforms: Reddit
Subreddits: (leave blank to monitor all, or specify target subreddits)

Competitor mentions:

Filter: "competitor-name" OR "competitor-name alternative" OR "competitor-name vs"
Platforms: Reddit

Product category keywords:

Filter: "[your category] tool" OR "[your category] software" OR "best [your category]"
Platforms: Reddit

Alert Delivery

Configure alerts to deliver via:

• Webhook (best for automation): Set up a webhook URL pointing to your n8n instance. Syften sends a POST with {title, url, text, source, matched_keyword, created_at}.
• Slack: Direct integration for human review before engaging.
• Email: Daily digest or real-time alerts.
• RSS: For consumption by other tools.

Pricing

| Plan | Price | Filters | Alerts | |------|-------|---------|--------| | Entry | $19.95/mo | 5 filters | Email, Slack, Webhook, RSS | | Standard | $39.95/mo | 15 filters | Same + priority support | | Pro | $99.95/mo | 50 filters | Same + API access |

Option 2: n8n Reddit Node (Self-hosted, free)

Build a polling workflow in n8n that checks target subreddits on a schedule.

Setup

1. In n8n, add Reddit OAuth2 credentials (Client ID, Client Secret, Username, Password)
2. Create a new workflow with a Schedule Trigger node

Workflow Pattern

Schedule Trigger (every 4 hours)
  → Reddit Node (Search: query="looking for [category]", subreddit="target_sub", sort="new", limit=25)
  → Filter Node (exclude posts older than 4 hours, exclude your own posts)
  → IF Node (check if post score > 1 AND num_comments < 20 — sweet spot for early engagement)
  → Slack Node (send alert with post title, URL, and matched keyword)

Multiple Keyword Monitoring

Chain multiple Reddit Search nodes in parallel, one per keyword group. Merge results and deduplicate by post ID before alerting.

Advantages

• Free (self-hosted n8n)
• Full control over filtering logic
• Can integrate directly with your response workflow

Limitations

• Polling delay (4-hour minimum recommended to stay within rate limits)
• Misses fast-moving threads where early comments matter most
• Must manage Reddit API rate limits across all n8n workflows

Option 3: Direct Reddit API Polling (Lowest level)

Use the reddit-api-read fundamental to poll subreddits directly via cron or a script.

Polling Script Pattern

import praw
import json
from datetime import datetime, timedelta

reddit = praw.Reddit(client_id="ID", client_secret="SECRET",
                     user_agent="Monitor/1.0", username="USER", password="PASS")

KEYWORDS = ["looking for", "alternative to", "best tool for", "struggling with"]
SUBREDDITS = ["SaaS", "startups", "smallbusiness", "Entrepreneur"]
SEEN_FILE = "seen_posts.json"

seen = json.load(open(SEEN_FILE)) if os.path.exists(SEEN_FILE) else []
cutoff = datetime.utcnow() - timedelta(hours=4)

for sub_name in SUBREDDITS:
    for post in reddit.subreddit(sub_name).new(limit=50):
        if post.id in seen:
            continue
        if datetime.utcfromtimestamp(post.created_utc) < cutoff:
            continue
        text = f"{post.title} {post.selftext}".lower()
        matched = [kw for kw in KEYWORDS if kw.lower() in text]
        if matched:
            # Send alert (Slack webhook, email, etc.)
            print(f"MATCH in r/{sub_name}: {post.title} | Keywords: {matched}")
            print(f"  URL: https://reddit.com{post.permalink}")
        seen.append(post.id)

json.dump(seen[-10000:], open(SEEN_FILE, "w"))

Run via cron every 4 hours. This is the lowest-cost option but requires the most maintenance.

Error Handling

• Rate limited: Back off and increase polling interval
• Subreddit not found: Verify the subreddit name hasn't changed or been banned
• No results: Check keyword specificity — too broad returns noise, too narrow returns nothing
• Syften webhook failures: Configure retry logic in n8n for webhook ingestion