Reddit to Slack and Gmail, daily insights without scrolling
Your best market signals are sitting on Reddit. The problem is you don’t have time to babysit subreddits, open 20 tabs, skim comment fights, and still walk away unsure what actually matters.
This hits marketers first, honestly. But founders and agency leads feel it too, because Reddit digest automation turns messy threads into something you can act on without losing your morning.
This workflow scans Reddit daily, summarizes what’s worth knowing with AI, then sends the same clean brief to Slack and Gmail. You’ll see how it works, what you need, and where teams usually trip up.
How This Automation Works
The full n8n workflow, from trigger to final output:
n8n Workflow Template: Reddit to Slack and Gmail, daily insights without scrolling
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The Problem: Reddit Research Is Valuable, but It’s a Time Sink
Reddit is where people say the quiet part out loud. They share frustrations, compare tools, complain about pricing, and reveal what they tried before they found a solution. The catch is that manual Reddit “research” is basically controlled chaos: you skim headlines, get pulled into comments, lose the original question, then realize you forgot to capture anything you can share with your team. Do that a few times a week and you’re spending real hours just to end up with half-remembered notes and a couple of links no one clicks.
The friction compounds. Here’s where it breaks down in real life:
- You read a promising thread, then can’t find it later when you need it for a pitch or a post.
- Trends show up in bursts, but you notice them days late because you only check when you remember.
- Sharing “research” becomes copying raw links into Slack with no context, so it gets ignored.
- Important signals get mixed with noise, which means your brain does the filtering work every single time.
The Solution: A Daily AI Reddit Digest Sent to Slack and Gmail
This n8n workflow runs on a schedule (by default, daily around 9 AM) and checks Reddit for fresh threads that match your subreddits, keywords, and ranking rules. It pulls in the posts you actually care about, then an AI agent analyzes each one using an OpenAI chat model. Instead of dumping a wall of text, it extracts themes, assigns short categories, and writes concise summaries you can scan in seconds. Finally, it publishes the digest to a Slack channel for quick team visibility and emails the same report through Gmail for stakeholders who live in their inbox. Links back to the original discussions are included, so you can jump into context only when something is worth it.
The workflow starts with a scheduled Reddit scan. From there, Reddit threads are retrieved and sent to the AI summarizer for theme extraction and one-sentence takeaways. The finished brief is then delivered to Slack and Gmail at the same time, so nobody has to ask, “Did you see this thread?”
What You Get: Automation vs. Results
| What This Workflow Automates | Results You’ll Get |
|---|---|
|
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Example: What This Looks Like
Say you monitor 4 subreddits for product and market chatter, and you usually skim about 10 threads a day. If you spend maybe 5 minutes per thread to understand it (and grab a quote), that’s roughly 50 minutes daily, plus another 10 minutes posting a summary into Slack and emailing someone who asked for “the highlights.” With this workflow, you spend 2 minutes setting your filters, then the 9 AM digest shows up on its own. You skim for 5 minutes, click through only the winners, and you’re done.
What You’ll Need
- n8n instance (try n8n Cloud free)
- Self-hosting option if you prefer (Hostinger works well)
- Reddit for sourcing threads from target subreddits.
- Slack to broadcast the daily digest to your team.
- OpenAI API key (get it from the OpenAI dashboard).
Skill level: Intermediate. You’ll connect accounts, tweak filters, and adjust an AI prompt without writing real code.
Don’t want to set this up yourself? Talk to an automation expert (free 15-minute consultation).
How It Works
A daily schedule kicks things off. At your chosen time (9 AM by default), n8n triggers the workflow so you don’t rely on memory or someone “owning” research.
Reddit threads are retrieved using your rules. The Reddit integration searches the subreddits you specify, then applies your filters such as keyword matching, post ranking (hot/top/new), and minimum engagement so you avoid low-signal posts.
AI turns discussion into digest-ready insight. An agent powered by an OpenAI chat model produces short summaries, theme categories, sentiment notes, and the “so what” you’d normally have to infer while skimming comments.
Your team gets the brief in two places. Slack receives the quick-hit version for visibility, and Gmail sends the same digest to stakeholders who prefer email, complete with links back to the original Reddit threads.
You can easily modify the target subreddits and keyword filters to match your niche, then keep the same Slack/Gmail distribution. See the full implementation guide below for customization options.
Step-by-Step Implementation Guide
Step 1: Configure the Schedule Trigger
Set the workflow to run automatically on a daily schedule.
- Add or open the Scheduled Reddit Scan node.
- Set the schedule rule so it triggers at
9in triggerAtHour. - Confirm the trigger is connected to Retrieve Reddit Threads.
Step 2: Connect Reddit and Fetch Posts
Configure the Reddit search used to pull relevant threads.
- Open Retrieve Reddit Threads.
- Set Operation to
search. - Set Subreddit to
Chatgpt. - Set Keyword to
why I stopped using it. - Set Limit to
5. - Credential Required: Connect your Reddit credentials.
Step 3: Set Up AI Summarization
Use the AI agent to summarize each Reddit post.
- Open AI Post Summaries and set Prompt Type to
define. - Set Text to
=Analyze the following Reddit post. Classify its main topic in 3-5 words, and write a 1-sentence summary. Title: {{ $json["title"] }} Content: {{ $json.selftext }}. - Ensure OpenAI Chat Engine is connected as the language model for AI Post Summaries.
- Credential Required: Connect your OpenAI credentials in OpenAI Chat Engine (the AI sub-node uses the parent’s model connection).
- Set the model in OpenAI Chat Engine to
gpt-4o-mini.
Step 4: Configure Output Destinations
Send summaries to Slack and email in parallel.
- Confirm that AI Post Summaries outputs to both Slack Summary Broadcast and Email Summary Dispatch in parallel.
- In Slack Summary Broadcast, set Text to
=Topic: {{ $('Retrieve Reddit Threads').item.json.subreddit }} Summary: {{ $json.output }} View on Reddit: {{ $('Retrieve Reddit Threads').item.json.media_metadata.cnn80k7excte1.p[0].u }}. - Set Channel in Slack Summary Broadcast to
[YOUR_ID]. - Credential Required: Connect your Slack credentials.
- In Email Summary Dispatch, set Send To to
[YOUR_EMAIL]. - Set Subject to
=New Reddit Post on {{ $('Retrieve Reddit Threads').item.json.subreddit }}. - Set Message to
=Topic: {{ $('Retrieve Reddit Threads').item.json.subreddit }} Summary: {{ $json.output }} View on Reddit: {{ $('Retrieve Reddit Threads').item.json.media_metadata.cnn80k7excte1.p[0].u }}. - Credential Required: Connect your Gmail credentials.
media_metadata.cnn80k7excte1.p[0].u. If this field is missing on some posts, replace it with a more consistent URL field from the Reddit response.
Step 5: Test and Activate Your Workflow
Validate the full execution path and enable the schedule for production.
- Click Execute Workflow to run a manual test from Scheduled Reddit Scan.
- Verify Retrieve Reddit Threads returns items and AI Post Summaries generates a summary in
$json.output. - Confirm both Slack Summary Broadcast and Email Summary Dispatch receive the summary output.
- When successful, toggle the workflow to Active to run on the scheduled trigger.
Common Gotchas
- Reddit credentials can fail if your app settings or scopes are off. If posts stop coming in, check your Reddit API app settings first, then confirm the credential still exists in n8n.
- If you’re using Wait nodes or external processing, run times vary. Bump up the wait duration if downstream nodes fail on empty responses, especially on busy Reddit days.
- Slack posting can “work” but land in the wrong channel if the OAuth user lacks access. Confirm the channel permissions and double-check the selected channel in the Slack node.
Frequently Asked Questions
About 30 minutes if you already have your accounts ready.
No. You connect credentials and tweak filters and prompts inside n8n.
Yes. n8n has a free self-hosted option and a free trial on n8n Cloud. Cloud plans start at $20/month for higher volume. You’ll also need to factor in OpenAI API usage, which is usually a few cents per day for small digests.
Two options: n8n Cloud (managed, easiest setup) or self-hosting on a VPS. For self-hosting, Hostinger VPS is affordable and handles n8n well. Self-hosting gives you unlimited executions but requires basic server management.
Yes, but you’ll want to change the prompt used by the AI Post Summaries agent so it explicitly extracts competitor mentions, pricing comments, and “switching from X to Y” language. You can also tighten the Reddit search filters to subreddits where buyers compare tools, then raise engagement thresholds so you’re analyzing fewer, higher-signal threads. A common tweak is sending competitor-related insights to a separate Slack channel while keeping the general digest in the main channel.
Usually it’s invalid or expired Reddit API credentials, or your Reddit app configuration changed. Regenerate the credentials, update the Reddit node in n8n, and confirm the account has access to the subreddits you’re querying. If it works for a while then fails randomly, you may be hitting rate limits on high-volume searches, so reduce the number of queries or narrow your filters.
It depends on how many threads you choose to pull each day and your n8n plan. On n8n Cloud, your limit is based on monthly executions, so most teams start by digesting a small batch (like 10–30 posts) and expand once it’s useful. If you self-host, there’s no execution cap, but you’re still limited by your server resources plus Reddit and OpenAI rate limits.
For this use case, n8n is usually the better fit because the AI agent workflow and branching logic are more flexible, and self-hosting can make high-volume research affordable. You also get tighter control over how Reddit is queried and how the digest is formatted before it hits Slack and Gmail. Zapier and Make can work, but complex filtering often turns into a pile of steps that’s annoying to maintain. Frankly, the moment you want “summarize these threads, classify themes, then send two different outputs,” n8n starts feeling simpler. Talk to an automation expert if you want help choosing.
Once this is running, Reddit becomes a quiet, reliable input to your week instead of a daily distraction. The workflow handles the repetitive filtering and summarizing so you can focus on decisions, content, and momentum.
Need Help Setting This Up?
Our automation experts can build and customize this workflow for your specific needs. Free 15-minute consultation—no commitment required.
