Best Subreddits to Find Startup Ideas and Pain Points (2026, by Niche)

The best subreddits for finding startup ideas depend on your niche, but the honest starting list is: r/SaaS, r/startups, r/Entrepreneur, and r/indiehackers for general founder pain, plus a niche-specific subreddit for whatever you actually want to build in (r/ecommerce, r/freelance, r/Emailmarketing, and so on). Below is the full list, organized by niche, with each one linked to a live page of the real, scored pain points we found there, so you do not have to take our word for it.

"Where do I even look?" is the single most common thing we hear from founders trying to validate an idea. When we went through the Reddit posts people write about this exact struggle, that question came up more than anything else, more than "is my idea good" or "how do I market this." People know Reddit has the answer. They just do not know which room to walk into.

This list is our answer, plus one lesson that most subreddit lists get wrong.

How to tell if a subreddit is actually worth your time

Not every subreddit with the right name is worth reading. Before you commit to one, check for these:

• At least 10,000 members. Smaller communities rarely have enough volume to reveal a real pattern.
• Regular activity: new posts and comments daily, not a ghost town with one thread a week.
• Engaged discussion: multiple comments per post, people actually arguing and comparing notes.
• Authentic conversation, not a feed of self-promotion. If every third post is someone's product launch, the signal is buried.

The trap most subreddit lists miss

A subreddit's name is not a guarantee of what is actually being discussed there. We learned this the hard way while building this exact research.

We assumed r/sales would be full of sales-tooling pain: CRM complaints, lead generation struggles, that kind of thing. It was not. r/sales turned out to be dominated by career talk: interview anxiety, job transitions, mentorship questions. Real pain, just not the pain we were looking for. To get the actual sales-function complaints, we had to mix in r/leadgeneration and r/CRM alongside it.

The lesson: pick a subreddit by the pain it actually carries, not by the name that looks like the closest match. Skim a subreddit's top posts from the last month before you commit real research time to it. If you keep seeing career and job posts instead of product or workflow complaints, it is the wrong room, no matter how well the name fits.

SaaS and startups

The general founder communities. Good for broad validation and watching what other builders are struggling with right now.

• r/SaaS · distribution, validation, and the AI-app gold rush flopping
• r/startups
• r/Entrepreneur
• r/EntrepreneurRideAlong
• r/indiehackers
• r/growmybusiness
• r/juststart
• r/sweatystartup

If you already know you want to build for founders specifically, skip straight to the idea pages: startup ideas for SaaS founders, B2B SaaS ideas, and micro SaaS ideas, each pulled from these same communities.

• Startup ideas for SaaS founders
• Startup ideas for B2B SaaS
• Startup ideas for micro SaaS

E-commerce

Merchants running their own stores. Expect fulfillment, platform, and margin complaints. Our Shopify page alone gets real search traffic because the pain is so specific and recurring.

• r/ecommerce
• r/Shopify · chargebacks, outages, and quiet migration doubts
• r/Etsy
• r/dropship

• Startup ideas for ecommerce sellers
• Startup ideas for Shopify app makers
• Startup ideas for Etsy sellers
• Startup ideas for dropshipping
• Startup ideas for Amazon FBA sellers

Marketing and growth

Marketers are unusually open about what is broken in their stack, because their job depends on tools working. This cluster is worth reading even if marketing is not your niche, since a lot of the pain is tooling pain.

• r/marketing
• r/content_marketing
• r/copywriting
• r/SEO
• r/PPC
• r/socialmedia
• r/Affiliatemarketing
• r/Emailmarketing · deliverability is the dominant complaint by far

• Startup ideas for marketers

Sales

This is the niche from the trap above. We combined three communities to get real sales-function pain instead of career chatter.

• r/sales + r/CRM + r/leadgeneration · CRM friction, lead generation, prospecting, AI-SDR skepticism

Developers and no-code builders

• r/webdev
• r/nocode

• Startup ideas for developers
• Startup ideas for no-code builders

Freelancers and consultants

• r/freelance · getting paid is the single biggest complaint

• Startup ideas for freelancers
• Startup ideas for consultants

A couple more worth knowing

• r/productivity
• Startup ideas for fintech

What if your niche is not on this list?

This list covers the niches we have already scanned and scored, but Reddit has a specific subreddit for almost anything. The manual way to find yours: search "[your niche] reddit" on Google, or check a subreddit directory, then run it through the checklist above before you trust it.

The faster way is to skip picking a subreddit yourself. Tell IdeaFast your interest and it auto-discovers the subreddits most relevant to it for you, then scans them the same way we scanned the ones above. This exists because we kept hitting the exact "where do I even look" wall ourselves.

The honest takeaway

A good subreddit list saves you the first, most annoying step of research. It does not do the research for you. Pick two or three from your niche, read the top posts from the last month, and watch for the same complaint showing up from different people. That repetition is the signal you are actually looking for.