Flow from Reddit to Gmail with key features and GPT-4o mini usage

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

What it does Automatically monitors multiple subreddits daily, identifies trending posts with high engagement, and delivers AI powered summaries directly to your inbox. Never miss important discuss...

Best for

Market Research automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.scheduletrigger, n8n-nodes-base.splitout, n8n-nodes-base.reddit, n8n-nodes-base.merge, n8n-nodes-base.set, n8n-nodes-base.filter, n8n-nodes-base.sort

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Hunyao.

Original n8n.io source

1.1 Workflow description

Title: Flow from Reddit to Gmail with key features and GPT-4o mini usage
Workflow name: Flow from Reddit to Gmail with key features and GPT-4o mini usage

What it does

Automatically monitors multiple subreddits daily, identifies trending posts with high engagement, and delivers AI-powered summaries directly to your inbox. Never miss important discussions in your favorite communities again.

Perfect for

Investors tracking market sentiment, researchers monitoring industry discussions, content creators finding trending topics, or anyone wanting curated Reddit insights without endless scrolling.

Apps used

Reddit, OpenRouter (GPT-4o mini), Gmail

How it works

Triggers daily at your chosen time across all specified subreddits
Fetches hot posts from the last 24 hours with scores above 30 upvotes
Sorts posts by engagement score to prioritize trending content
Extracts post content plus top-level comments for full context
Generates concise AI summaries for each high-value thread
Compiles summaries into a clean HTML email digest
Delivers the digest to your Gmail inbox with clickable Reddit links

Setup

Configure these three essential settings:

Schedule time: Set your preferred daily delivery time in the Schedule Trigger node. Replace with your preferred hour (currently 6 AM). Note: Times display in your workflow timezone
Topic and subreddits: In the "Set Topic, Subreddits and Email Address" node, replace with your topic name (e.g., "Investing") and replace with your subreddit array (e.g., ["investing", "stocks"])
Email recipient: Replace with your Gmail address in the same node

Credentials

Reddit OAuth2 for API access, OpenRouter API key for AI summaries, Gmail OAuth2 for email delivery

If you have any questions in running the workflow, feel free to reach out to me at my youtube channel: https://www.youtube.com/@lifeofhunyao

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 3 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 4 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 5 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - Schedule: Daily run

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.2

Block 7 - Split Subreddit List

Type / Role: n8n-nodes-base.splitOut - splitOut
Config choices: Version 1

Block 8 - List Hot Posts

Type / Role: n8n-nodes-base.reddit - reddit
Config choices: Version 1

Block 9 - Attach ISO Date to Posts1

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 10 - Normalize Post Date (created_utc → ISO)

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 11 - Select Fields (id, score, url, date, subreddit)

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 12 - Filter: Last 24h & Score > 30

Type / Role: n8n-nodes-base.filter - filter
Config choices: Version 2.2

Block 13 - Sort by Score (desc)

Type / Role: n8n-nodes-base.sort - sort
Config choices: Version 1

Block 14 - Iterate Posts (single batch)

Type / Role: n8n-nodes-base.splitInBatches - splitInBatches
Config choices: Version 3

Block 15 - Get Post by ID

Type / Role: n8n-nodes-base.reddit - reddit
Config choices: Version 1

Block 16 - Deduplicate by ID

Type / Role: n8n-nodes-base.removeDuplicates - removeDuplicates
Config choices: Version 2

Block 17 - Build Post Body (root)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 18 - List Top-level Comments

Type / Role: n8n-nodes-base.reddit - reddit
Config choices: Version 1

Block 19 - Flatten Comment Threads

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 20 - Filter: Valid Comments

Type / Role: n8n-nodes-base.filter - filter
Config choices: Version 2.2

Block 21 - Append Posts + Comments

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 22 - Build Thread Text

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 23 - Merge: Thread + Post Details

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 24 - Set (id, thread_text, link)

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Showing the first 24 of 39 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	Flow from Reddit to Gmail with key features and GPT-4o mini usage
Complexity	advanced
Nodes	39
Categories	Market Research, Multimodal AI
Author	Hunyao
Published	08 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7162/7162.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Market Research workflows Multimodal AI workflows

Frequently asked questions

What does Flow from Reddit to Gmail with key features and GPT-4o mini usage do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Market Research, Multimodal AI use case.

Hunyao

5 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.scheduletrigger n8n-nodes-base.splitout n8n-nodes-base.reddit n8n-nodes-base.merge n8n-nodes-base.set n8n-nodes-base.filter n8n-nodes-base.sort

Complexity

advanced

Published 08 Aug 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/7162/7162.json

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Flow from Reddit to Gmail with key features and GPT-4o mini usage

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - Sticky Note1

Block 3 - Sticky Note2

Block 4 - Sticky Note3

Block 5 - Sticky Note4

Block 6 - Schedule: Daily run

Block 7 - Split Subreddit List

Block 8 - List Hot Posts

Block 9 - Attach ISO Date to Posts1

Block 10 - Normalize Post Date (created_utc → ISO)

Block 11 - Select Fields (id, score, url, date, subreddit)

Block 12 - Filter: Last 24h & Score > 30

Block 13 - Sort by Score (desc)

Block 14 - Iterate Posts (single batch)

Block 15 - Get Post by ID

Block 16 - Deduplicate by ID

Block 17 - Build Post Body (root)

Block 18 - List Top-level Comments

Block 19 - Flatten Comment Threads

Block 20 - Filter: Valid Comments

Block 21 - Append Posts + Comments

Block 22 - Build Thread Text

Block 23 - Merge: Thread + Post Details

Block 24 - Set (id, thread_text, link)

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions