Best Subreddits to Find Startup Ideas (and What to Look For)

Most lists of the best subreddits to find startup ideas send you to the same few places: r/Entrepreneur, r/startups, r/SideProject. Those communities are useful for advice, but they are mostly founders talking to founders. The people with real, expensive problems are somewhere else.

This guide points you to six types of subreddit where complaints and requests show up naturally, and tells you what to look for in each. You will also get a way to tell a venting post from a problem someone might pay to fix.

Why broad startup subreddits are a weak place to look

In founder-focused subs, most posts are about building, launching or growing. That makes them a good place to learn, but a poor place to find customers.

There are three problems:

• The audience is other builders. Their problems are about marketing, validation and traffic. Those are crowded markets with plenty of tools already.
• Posts are often promotional. Many threads are launches or feedback requests, not complaints.
• Everyone reads them. If an idea is obvious from the top posts of a big sub, many other people have seen it too.

The better source is a community where people do a job, use a tool or run a small operation, and complain about it when something breaks. Nobody is selling there. They just want help.

What a good complaint looks like

Before the list, you need a filter. Any subreddit will have plenty of noise. These are the signals worth tracking:

• Intensity. Is the person angry, stuck or losing money, or just mildly annoyed? Words like "again," "hours," "nightmare" and "can't believe" are worth noting.
• Frequency. Does the same complaint appear in different threads, from different people, over months? One post is an anecdote. Ten is a pattern.
• Willingness to pay. Are they already paying for something that fails them, hiring someone, or building a clumsy workaround? Spending money or time is the strongest sign.
• Specificity. "Invoicing is hard" is vague. "I re-key the same data into three systems every Friday" is a product spec.

Keep these four in mind as you read the types below.

1. Trade and profession subreddits

Examples: r/sysadmin, r/accounting, r/nursing, r/Teachers, r/realestate, r/legaladvice-adjacent professional subs.

Why they work: People in the same job share the same daily friction. They vent to peers who understand the context, so posts are detailed and honest. Professionals often have budget or influence over tools at work.

What to look for:

• Posts that begin with "how do you all handle..."
• Complaints about tasks that happen on a schedule (month-end, onboarding, audits).
• Workarounds built in spreadsheets, scripts or email chains.

Here is a real example from r/sysadmin, where a user describes a messy situation after a company merger:

"8 months post-acquisition and we still have 200 people with active accounts in both tenants. Some line-of-business apps were never migrated."

You can read the original thread on r/sysadmin. It is a good model of the type of post to hunt for: a specific situation, a clear cost (duplicate accounts, security exposure) and a narrow audience that is easy to name.

2. Tool and platform subreddits

Examples: r/shopify, r/excel, r/notion, r/airtable, r/webdev, r/zapier.

Why they work: When a platform has a large user base, its subreddit fills up with gaps: things the platform cannot do, or does badly. Every gap is a possible add-on, template, plugin or service.

What to look for:

• "Is there an app that..." or "Is there a way to..." posts with no good answer.
• Complaints about pricing changes or removed features.
• Policy and account problems, which are painful because they can stop a business.

An example from r/webdev shows how one failure can spread:

"one of my client had his payment delayed... it affected my personal account as well. Mine also got deactivated/suspended."

The full r/webdev thread is about a hosting provider suspending accounts. Freelancers who manage client infrastructure under their own accounts are an identifiable group with a real risk, and that is the kind of detail you can build around.

3. Freelancer and agency subreddits

Examples: r/freelance, r/graphic_design, r/webdesign, r/SEO, r/PPC.

Why they work: Freelancers and small agencies sell time. Anything that eats unbilled hours hurts them directly, so they notice and complain about it. Many are also comfortable paying for tools that save time.

What to look for:

• Repeated tasks done for every new client: onboarding, reporting, audits, proposals.
• Chasing payments, scope creep and contracts.
• Tool stacks stitched together with manual copy and paste.

These posts often hint at a productized service as well as software. If many freelancers do the same task by hand, a fixed-price service might be the fastest way to test it.

4. Small business operator subreddits

Examples: r/smallbusiness, r/ecommerce, r/restaurateur, r/AmazonSeller, r/lawncare, r/HVAC.

Why they work: Owners deal with cash flow, staff, inventory and software all at once. They are often not technical, so they talk about the pain in plain terms rather than guessing at solutions.

What to look for:

• Complaints about software that is too expensive, too complicated or built for bigger companies.
• Posts about hiring and scheduling that mention money lost.
• Industry-specific workflows that general tools ignore.

Trade-specific subs (a particular trade, retail format or service business) tend to be better than the general ones. The narrower the group, the clearer the buyer.

5. Hobby and enthusiast subreddits

Examples: r/photography, r/3Dprinting, r/BeardedDragons, r/homebrewing, r/woodworking.

Why they work: Enthusiasts spend money, often more than you would expect, and they are passionate enough to describe small frustrations in detail. Many of these communities have weekly threads where people ask for tools.

What to look for:

• People paying for several tools to get one job done.
• Recurring questions that the community answers with long guides, which could become an info product.
• Complaints about marketplaces, shipping, or finding reliable suppliers.

Consumer ideas in these subs tend to be smaller than B2B ones, but they can be good for info products, niche marketplaces and simple apps.

6. Request-style subreddits

Examples: r/SomebodyMakeThis, r/AppIdeas, r/Lightbulb, and "what tool do you wish existed" threads inside other subs.

Why they work: The posts are direct. People write down what they want built.

What to look for, and what to be careful about:

• These posts are cheap to write, so many are wishes rather than needs. Few of these people will pay.
• Treat them as leads. Take the idea and go find the same complaint in a trade or tool subreddit, where the person has a real job and a real budget.
• Check whether anyone else in the thread replies with "I need this too." That is a stronger signal than the original post.

How to search inside any subreddit

Once you pick a community, use these steps:

1. Sort by top, then filter by year. This shows what the community cares about most over time.
2. Search complaint phrases. Try "frustrated," "waste of time," "is there a tool," "alternative to," "how do you handle," "we pay for" and "I hate."
3. Search for workarounds. Terms like "spreadsheet," "manually" and "script" show where people are patching a gap themselves.
4. Read the comments, not just the posts. Replies such as "same here" or "we pay for X but it doesn't do Y" tell you more than the original post.
5. Save exact quotes with links. You will want the person's wording for landing page copy and for checking later.
6. Log each finding. A simple sheet with the subreddit, the quote, the link, the date and your read on intensity, frequency and willingness to pay is enough.

A few cautions. Reddit posts reflect the people who post, not everyone in the industry. Be careful with one-off rants, and read each subreddit's rules before you message anyone. Do not post a pitch in a thread that has nothing to do with it.

How to check demand before you build

Reading threads by hand works, but it is slow, and you will miss things. If you want to speed it up, SaasNiche scans Reddit communities and surfaces pain points. Each one is scored 0–100 for intensity, frequency and willingness to pay, and backed by verbatim user quotes. That is the same checklist as above, applied to a larger set of posts.

Whichever method you use, the next step is the same: talk to the people who posted. A short, polite message that says you are researching the problem, not selling, is a fair way to start. Ask how they handle it today, what it costs them and what they have already tried. If several people describe the same pain in similar words and have already paid for a partial fix, you have something worth testing.

Then choose the smallest version you can sell. That could be a manual service, a template or a simple tool. You do not need to write much code to find out whether people will pay.

Putting it together

A simple routine works well:

• Pick two or three subreddit types from this list that match your background. Your own job or hobby gives you context others lack.
• Within each type, choose the narrowest communities you can find.
• Spend a few sessions collecting complaints with exact quotes and links.
• Rank them by intensity, frequency and willingness to pay.
• Contact the top few posters to ask about their experience.

The goal is not to find one perfect idea in one thread. It is to build a short list of problems with real people attached to them, so you are choosing between evidence instead of guesses.

Next step

If you would rather not scan subreddits one at a time, you can browse pre-scored pain points and read the quotes behind them. Start the 7-day Starter trial at SaasNiche and compare what you find with your own manual research.

FAQ

Which subreddits are best for finding startup ideas?

The most useful ones are usually narrow communities where people do a specific job, use a specific tool or run a specific kind of small business. Examples include professional subs like r/sysadmin, tool subs like r/shopify and freelancer communities like r/freelance. Broad founder subs are better for advice than for finding customers.

Are r/Entrepreneur and r/startups good for idea research?

They can help you learn what founders struggle with, but most of the audience is other builders, and many posts are launches or advice requests. For problems that businesses will pay to solve, trade and tool communities are usually more informative.

How do I know if a Reddit complaint is worth building for?

Look for three things: the pain is strong (money, time or risk is involved), it shows up repeatedly across threads, and people are already paying or using workarounds. A single angry post is not enough. Talking to the poster and finding similar posts will tell you more.

Is it okay to message people who post on Reddit?

It is generally accepted if you are respectful, keep it short, explain that you are researching a problem and do not pitch. Check the subreddit's rules first, and be ready for people not to reply. Never spam many users with the same message.

Can I use Reddit quotes in my marketing?

Quotes are useful for understanding how customers describe a problem, and many founders borrow the phrasing for their copy. Be careful about publishing someone's username or exact words in public marketing. Paraphrase where you can, and ask permission if you want to quote a person directly.