If you searched for an Exploding Topics alternative, you probably want one of two things: a different list of trends, or a different way to decide what to build. Most roundups answer the first. This article is about the second.

Trend tools show you what people are starting to search for. Complaint-based discovery shows you what people are already frustrated about, in their own words. Those are different starting points, and each fits a different kind of founder.

What trend tools like Exploding Topics are good at

Trend tools track rising keywords, products and topics. They answer the question "what is getting more attention?"

That is useful in a few situations:

You want to time a content site, newsletter or affiliate project around a growing interest.
You are scanning a broad market to decide which category to enter.
You need a quick sanity check that a topic is not shrinking.
You are an investor or analyst watching categories rather than building one product.

If your goal is to ride attention, a trend tool is a reasonable place to start. Nothing below is meant to dismiss that.

Where trend-first discovery falls short for startup ideas

A rising keyword tells you that interest is growing. It does not tell you what is broken, who is annoyed, or whether anyone would pay to fix it.

Here are the gaps founders usually run into.

Attention is not pain

A topic can climb because of news, hype or curiosity. People searching for it may be browsing, not struggling. A rising term like a new AI technique may attract thousands of searches and still leave you with no clear problem to solve.

Everyone sees the same trend

Public trend lists are public. By the time a keyword looks obviously promising, many builders are already thinking about it. You end up competing on speed and marketing rather than on understanding a customer better than they do.

Keywords hide the job to be done

A search term is two or three words. A complaint is a paragraph with context: who the person is, what they tried, what went wrong, what it cost them. That detail is what shapes a product.

You still have to find a customer

A trend gives you a topic. A forum post gives you a person you can talk to. If you are a solo or non-technical founder, that difference matters because your first sales come from conversations, not dashboards.

What complaint-based discovery means

Complaint-based discovery starts with people describing problems in public: Reddit threads, forums, review sections, support communities. You collect the verbatim language, look for repeats, and judge whether the problem is painful and frequent enough to build around.

The evidence is different from a trend line:

Verbatim wording. You can reuse how customers describe the problem on a landing page.
Context. You see the workflow, the tools involved and the cost of the problem.
A named source. You can read the thread, check it is real and, where the community allows it, ask questions.

It is slower to read than a chart, but it is much closer to what you actually need to decide.

What verbatim pain looks like

Here are real posts surfaced by SaasNiche, each with a source link in the product. Notice how much more they tell you than a keyword would.

A workflow problem with a clear cost

A poster in r/entrepreneur described agency work like this:

"Every time i took on a new client i was doing the same manual analysis over and over. Go through their website, check the SEO, read the copy, look at competitors, figure out where they're leaking money."

A trend tool might show "website audit" as a keyword. This quote shows the repeated, manual nature of the task, who does it and what the output is for.

A pricing problem for a specific segment

In r/startups, a poster wrote:

"Minimums are like $750 a month which is too high for us. We’re very new and don’t have revenue yet."

That quote appears on SaasNiche's pain points for startup founders page. It points to a gap between how a product is priced and who needs it. No rising-keyword chart would show you that.

A constraint that shapes the product

A poster in r/selfhosted wrote:

"Bot problem is getting insane... I dont want my users data sitting on some random server I dont control."

The source post tells you the problem (bots) and the constraint (no third-party data sharing). That constraint is a product requirement you would have missed by searching "CAPTCHA" alone.

Trend-first vs complaint-first: when each fits

Use this as a rough guide.

Start with trends when

You are choosing a content or media niche.
You want to explore categories before picking a direction.
You have distribution already and need something timely to offer it.
You are comfortable with a crowded space and plan to compete on execution.

Start with complaints when

You want to build a product, service or info product and need proof someone cares.
You are a solo or non-technical founder who has to win the first customers by hand.
You prefer a narrow niche with a clear buyer over a broad rising market.
You want language to use in landing pages and outreach.

Many founders land on complaints once they realise the real risk is not missing a trend. It is building something nobody wants.

How to run complaint-based discovery yourself

You can do this by hand. It takes time, but the method is simple.

Pick professional communities, not general ones. Subreddits where people are trying to get work done tend to produce more specific problems than broad startup forums. The guide to finding SaaS ideas on Reddit lists examples and search patterns.
Search for emotional or intent phrases. Phrases like "I hate when...", "Is there a better way to...", "Why is this so hard..." and "I would pay for..." tend to surface real frustration.
Save exact quotes and links. Do not paraphrase. Keep the username, date and thread so you can verify later.
Group by problem, not by keyword. Five different posts about the same annoying task are one signal.
Check for repeat and for payment signals. One angry post is an anecdote. Several posts, plus mentions of existing spend or workarounds, is a pattern.
Talk to the poster. A short, polite message asking about their experience beats another week of desk research.

How to tell venting from a real opportunity

This is the hardest part. Not every complaint is a business. Not every complaint is a business.

Look at three things.

Intensity

How strongly does the person feel about this? Strong language, lost money, lost time and missed deadlines are all signs. A mild "this is a bit annoying" is not.

Frequency

Does the same problem appear across multiple posts, users and communities? Repeats suggest a market. A single viral thread may not.

Willingness to pay

Do people mention budgets, existing tools, agencies they hired or workarounds they built? Someone who already pays for a clumsy fix is a better lead than someone who just wants a free one.

These are the three factors SaasNiche uses to score each pain point from 0 to 100. If you do the work by hand, you can use the same three questions as a checklist.

A score or a checklist only narrows the field. You still need to read the quotes and talk to people before you commit.

Using both approaches together

You do not have to pick one forever. A workable order is:

Use a trend tool to see which areas are growing.
Pick a profession or niche inside that area.
Read what people in that niche complain about.
Pick one problem with strong, repeated, paid-for pain.
Check the trend again to make sure the area is not shrinking.

This way the trend informs where to look, and the complaints decide what to build.

Where SaasNiche fits

Doing the manual version works, but it takes time to read posts and copy links. SaasNiche scans Reddit communities to surface pain points, each scored 0–100 for intensity, frequency and willingness to pay, and backed by verbatim user quotes. It also generates AI solution ideas (SaaS, productized service or info product) and lets you message the original posters for customer discovery.

It also includes trend signals, so you can see which problems are heating up and which are long-running. That puts a bit of the trend view next to the complaint evidence rather than in place of it.

You can see what the output looks like on pages such as pain points for startup founders, where each pain point shows a quote, a score and a source link.

Your next step

Pick one niche you know or can reach, read 20 real complaints in it, and write down the three that repeat most. Then message one or two of the people who posted them.

If you would rather not collect and score the posts yourself, SaasNiche's Starter plan is $19/month with a 7-day trial. See the pricing page for current plans.

FAQ

What is the difference between trend research and pain-point research?

Trend research looks at what is gaining attention, usually through search volume or mentions. Pain-point research looks at what people say is wrong, usually through forum posts, reviews or interviews. Trends show where interest is moving. Pain points show what problem a product could solve.

Can a rising keyword be a good startup idea on its own?

Sometimes, but a keyword alone leaves out who has the problem, how bad it is and whether they pay for fixes today. Most founders need that extra evidence before building. A rising keyword is better treated as a prompt to investigate than as a validated idea.

Why use Reddit for finding startup ideas?

Reddit has many niche communities where people describe work problems in detail and often without marketing polish. That makes it a useful source of raw, specific complaints. It is not a complete picture of any market, so findings should be checked with direct conversations.

How many complaints do I need before an idea is worth testing?

There is no fixed number. A reasonable approach is to look for the same problem across several posts and more than one community, then confirm it with a few direct conversations. One post is a lead. A pattern with spending signals is stronger evidence.

Is it okay to message people who post complaints?

In general, a short, honest message asking about their experience is acceptable, but rules vary by community and platform. Check the subreddit rules, avoid pitching a product in the first message, and be clear that you are researching the problem.

Exploding Topics Alternative for Finding Startup Ideas