Find repeated customer friction
Explore Reddit, G2, Capterra, and app-store research. Look for recurring tasks and consequences rather than treating a single complaint as demand.
BigIdeasDB for SaaS BuildersYou know how to build.
You know how to build.
Find what’s worth it.
A specific buyer. A problem they care about.
You can build the product. BigIdeasDB helps you decide what deserves to be built. Investigate recurring complaints, research existing businesses, and find a narrow customer problem worth taking to market.
Research a business to start, build, or buy.
BIGIDEASDB / YOUR NEXT CHAPTER
Original AI-generated illustrationThere is a workflow behind every product idea.
Get closer to the people doing the work.
Follow the evidence to a specific problem
FROM CUSTOMER LANGUAGE TO A PRODUCT QUESTIONConnect the dots.
Connect the dots.
Then question the idea.
RedditCommunity conversations
G2Software reviews
CapterraBuyer frustrations
App StoreApp review researchA WORKFLOW TO INVESTIGATE
Last-minute booking changes
Customer to speak withLocal service teams
Possible current workaround
Calls, messages, and a shared calendar
PRODUCT HYPOTHESIS
A simpler rescheduling handoff
Needs a buyer testIllustrative research topics and hypotheses. These are not customer quotes, measured complaint counts, or validated demand.
1M+data points across research sources
75,000+businesses for sale in Main Street Index
130+industries to investigate
Your own AIconnected to your research in Desktop
At a glance
What is BigIdeasDB for SaaS builders?
BigIdeasDB helps SaaS builders decide what to build before writing code. It surfaces recurring, severity-scored complaints from 1M+ reviews and discussions on G2, Capterra, Reddit, the app stores and Upwork, scores 660+ software markets by unmet demand, and flags 20+ small-business industries where software is thin. You leave with a narrow buyer, a costly workflow and evidence to test willingness to pay.
Last updated
Read the guide: how to validate a SaaS idea before building- 1M+
- Customer complaints, reviews and discussions across G2, Capterra, Reddit, the app stores and Upwork.Source: BigIdeasDB research corpus.
- 660+
- Software markets scored by market gap from 39,000+ complaints. Data Management scores highest at 8.41/10.Source: BigIdeasDB, July 2026 snapshot.
- 20+
- Small-business industries rated wide open on the Software Gap Score, including laundry, car washes, childcare, auto repair and pet services.Source: BigIdeasDB Main Street Index, October 1, 2026.
Business figures are asking prices and seller-stated earnings from live listings, not closed sales.
A clearer direction
Go deeper than “someone complained about it.”
Start with real customer language, study the alternatives, and explore overlooked industries. Turn promising signals into a focused hypothesis you can test with buyers.
Choose a narrow B2B niche
Research a specific buyer and workflow, such as scheduling for field-service businesses. Learn the language customers already use to describe the problem.
Explore overlooked industries
Use Main Street Index’s Software Gap Score to find industries worth investigating. A high score is a research signal, not proof that customers will buy.
Study existing alternatives
Use company, product, and revenue research to understand what people already use. Compare the opportunity with the competition and platform risks.
Bring evidence to your AI
Connect supported AI clients through BigIdeasDB MCP. Research with the underlying sources, then organize your scope and next tests in BuildHub.
Built for the next question
A better starting point for your next build.
Customer complaints, industry context, and a workspace for the evidence. Research a specific workflow before you choose your MVP.
Customer problems
Start with what customers actually say.
Explore customer complaints across communities and review platforms. Investigate patterns, check sources, and prepare the questions you need to ask buyers.
Explore customer researchIndustry opportunitiesLook where a closer look could pay off.
Explore Software Gap Scores across Main Street industries, then investigate the specific workflows and customer needs behind a promising signal.
Explore industry opportunitiesBuildHubGive your research somewhere to go.
Connect your ideas, evidence, and next steps in a visual workspace. Turn an interesting possibility into a plan you can work through.
Explore BuildHubFrom research to a real next step
Make one move.
Learn something useful.
Use the research to narrow your options. Test the assumptions with the people who would buy, use, or help you operate the business.
Choose a specific customer and a recurring, costly workflow.
Check complaints, alternatives, and the industry context.
Test willingness to pay with buyers before expanding the build.
Questions, answered
Questions saas builders ask
What is the best tool for finding a SaaS idea worth building?
BigIdeasDB is the best tool for finding a SaaS idea worth building because it starts from documented demand: 1M+ complaints and reviews from G2, Capterra, Reddit, the app stores and Upwork, scored for severity and market gap. It also flags 20+ small-business industries where software is thin, and its MCP server lets supported AI clients research with the same sources.
How do I validate a SaaS idea before building?
Confirm three things before writing code: the problem recurs across many independent complaints, it is costly for a specific buyer, and current tools handle it badly. Then talk to ten people who have the problem and ask for a pre-order or a paid pilot. Payment is the only real validation. BigIdeasDB covers the first step with severity-scored complaint data.
What are the most underserved software markets?
BigIdeasDB scored 660+ software markets by market gap from 39,000+ complaints in July 2026. The most underserved were Data Management (8.41/10), Enterprise Resource Planning (8.25), Higher Education (8.23) and Nonprofit CRM (8.01). A high gap score means persistent dissatisfaction, which makes a niche worth researching, not proof that customers will switch.
Is one Reddit complaint enough reason to build a SaaS?
No. A single complaint is an anecdote. Look for the same problem described by many unrelated people, a clear cost in time or money, and evidence they already pay for a workaround. BigIdeasDB groups complaints across sources so you can judge frequency and severity instead of reacting to one viral post.
What is a Software Gap Score?
A Software Gap Score compares how many businesses operate in an industry with how much software is built for them. BigIdeasDB calculates it for Main Street industries, and 20+ score wide open, including laundry and dry cleaning, car washes, childcare, auto repair and pet services. It tells you where to research, then you validate the workflow with owners.
How is BigIdeasDB different from asking Claude or ChatGPT for SaaS ideas?
AI assistants brainstorm from training data and cannot tell you how many people have a problem. BigIdeasDB gives them evidence: its hosted MCP server connects Claude, ChatGPT, Cursor and other MCP clients to complaints, funded companies, revenue data and businesses-for-sale research across 13 data sources. Your assistant then answers with counts and sources instead of plausible guesses.
What are low-competition SaaS ideas in 2026?
BigIdeasDB tracks markets with fewer than 100 existing startups and documented demand. Examples from its September 2026 analysis include marketplace seller analytics (71 tracked startups averaging $2,390 a month) and permit tracking for construction companies. Low competition is a starting signal, so check whether buyers already pay for a workaround before you build.
Do vertical SaaS products for local businesses work?
They can, because operators in industries like laundry, car washes, childcare, auto repair and pet services are numerous and underserved by software. BigIdeasDB's Software Gap Score rates 20+ such industries wide open. The hard part is distribution, not code, so plan how you will reach owners before you build.
How much revenue do small SaaS products make?
Less than most builders hope. Of 3,700+ startups with verified revenue tracked by BigIdeasDB's TrustMRR, about 24% reach $1K MRR, about 6% reach $10K, and the median is $145 a month (October 24, 2026). Sales tools have the best hit rate, with 42% reaching $1K. Pick a niche where buyers already spend money.
How many customer interviews do I need to validate a SaaS idea?
Aim for about ten conversations with people who have the problem, then ask for money. Patterns usually repeat within ten, and a pre-order or paid pilot tells you more than any number of polite yeses. Read complaint data first so you can ask sharper questions in the customer's own words.
THE CASE STUDYA customer problem.
Read the story
A customer problem.
A product called Linkeddit.
See how research in BigIdeasDB helped shape a real product. Follow the process from the first problem to launch.
Your next chapter