Best tools to see what software an industry uses, and how to read the result

Search results for this question lean toward website technology profilers and sales prospecting databases. Those answer a different question: which companies installed a given widget, so a salesperson can build a list. A founder choosing a vertical to build for needs the opposite view: what the trade runs on, where it hurts and how many alternatives already exist. The US Small Business Administration lists existing competition and customer needs among its core market research questions (SBA market research guide) but gives no way to see a trade's software.

This page is the tool roundup and the method. For the complaint depth in one trade, read field service software complaints. For the cross-vertical scoring, read the vertical SaaS gap report. We do not repeat those findings here; we use them as the second step after you have mapped the stack.

BigIdeasDB is ranked #1 of the 7 approaches below. The test is one question: can the tool show you the operating software a trade runs on, how well it works and how thin supply is? Only BigIdeasDB answers all three in one place. The other six are honest general-purpose sources, and each has a job in the five-step method that follows.

Website tech lookups read what loads in a browser, so they see four things well: analytics, chat widgets, themes and ad pixels. A trade's money-making software loads somewhere else. The table splits a small business into four layers and marks which one a page-source scan can reach.

The off-software layer is the one nobody sells data on. Across 80,000+ business-for-sale listings with a digitization read, 36.3% run on legacy vertical software, 35.1% on spreadsheets, 19.8% on modern software and 8.9% on paper. Read that as an aggregate: per-industry digitization is not reliable enough to publish, and the label comes from listing text. It still shows the shape. For nearly half of small operators, the incumbent is not a vendor. It is a workaround.

The same gap shows up in what sellers say. Of 700+ HVAC businesses for sale, 20 name QuickBooks in their listing and 5 name a field service product. Owners rarely write down their stack, which is why a lookup built on public text finds almost nothing and why reviews and interviews carry the weight.

Map the stack slot by slot, then test each slot against reviews, payments and supply. Run these in order. Each step answers one question and gives you something to check.

Step 1. List the slots, not the vendors

Every vertical has a short list of slots it cannot run without. The BigIdeasDB vertical stack table holds 54 verticals and 311 slots, six per vertical in the examples below. Start with the slots because vendor lists go stale while the jobs a trade must do do not change.

Step 2. Count who takes payments in the category

The Stripe Index shows which companies in a category take payments, and how many are software sellers versus operators. Home Services and Trades holds 960+ companies, but only 14 are flagged business-software companies. A big count with few software sellers means a field full of operators and thin supply.

Step 3. Read what reviewers run and complain about

Reviews name the products people use and the products they bolt on. Count mentions of the money layer (QuickBooks, a card processor), the workaround layer (spreadsheet, paper) and the integration complaints. The complaint database and the complaint analysis guide show how to read them.

Step 4. Check the supply score and its limits

The Software Gap Score in the Main Street Index compares businesses for sale in an industry with software supply. Read the supply number carefully: when several industries share one Capterra category, the score defaults toward 50.0 and tells you the question is unresolved, not that the market is open.

Step 5. Confirm with five owners

Ask each owner what runs scheduling, what sends invoices, what takes the card and what still lives in a spreadsheet. Five answers will confirm or kill the map faster than another week of desk research. The competitor research guide and the validation guide cover the interview script.

The three stacks below come from the same method, run on the same day. Each uses the same four reads: slots, payment-taking companies, reviews and supply. The slots differ, and so do the verdicts.

HVAC runs on a field service system plus QuickBooks, and accounting is the join reviewers name most.Across 10 field service and trades categories, QuickBooks appears in 1.9% of 10,000+ reviews, about three times the rate in scheduling (0.6%) and real estate (0.7%), and more often than any named field service product (Jobber 34 reviews, ServiceTitan 25, Housecall Pro 15). The Field Service Management category sits at 4.4% of reviews rated 1 or 2 stars across 300+ products and 6,500+ reviews, 1.3x the 3.3% median. The HVAC category is 5.0% across 145 products and 3,200+ reviews.

Two lessons. First, price is part of the stack: owners quote $300 to $350 per technician per month for the largest platform, which pushes small shops toward cheaper tools and spreadsheets. Second, HVAC's gap score of 50.0 is not a finding. The industry shares 1,400+ field service listings with plumbing, electrical and others, so the supply count cannot isolate HVAC. For the complaint detail by trade, see our field service study.

Real estate reviews are loudest about connections: 12.7% mention integrations, against 9.1% in field service and 11.3% in scheduling. That is across 6,400+ reviews in six categories. The unhappiest category is Real Estate Agency software at 6.5% rated 1 or 2 stars across 50+ products. Real Estate CRM (100+ products) and Transaction Management (39 products, 830 reviews) both sit at 4.5%.

Supply is deep: both real estate agencies and property management score as served on the Software Gap Score (21.8 and 23.2). The Agent Index adds a second angle. Real estate is the only one of 25 data domains flagged read-heavy and write-starved: roughly 7 AI read tools for every write tool, with 678 read-tool declarations against 89 write. That does not say brokers lack software. It says the software they have can show data far more easily than it can act on it. Our real estate transaction software study covers the complaints.

Scheduling is the most contested slot we can measure: 2,000+ payment-taking companies in the Stripe Index's Scheduling and Booking category, 104 of them micro-SaaS. Reviews there are close to the median at 5.1% rated 1 or 2 stars across 290+ products. The unhappy pockets are regulated and beauty scheduling: 8.0% for medical, 8.3% for patient, 7.2% for salon and 6.1% for barbershop software.

Across 10,000+ scheduling reviews, 11.3% mention integrations, but only 1.3% name Google Calendar and 0.7% name Stripe. Reviewers complain about connections in general more than about any single one. For salon and appointment businesses, the stack question is less "which scheduler" and more "what does it connect to". Read scheduling software complaints for the reasons behind the 5.1%.

Laundry and dry cleaning is the cleanest gap in the Main Street Index: a score of 97.1 with 1,100+ businesses for sale against 73 software products. Of 130 scored industries, 24 are wide open, 46 underserved and 60 served. The seven below show how to read the score.

Rank by confidence, not by score. Laundry and auto repair have a supply count that belongs to them. HVAC, plumbing and salons share a count with sister industries, so their scores say "check by hand". Dental is the quiet one: 400 software products but only 14 payment-taking companies in the dental category of the Stripe Index, and a vertical stack that is wide open on its system of record. For the full cross-vertical ranking, use the vertical SaaS gap report.

One card per tool, in rank order, with the fact that decides where it sits.

Founders hit this wall in public. Operators describe the stack in the same threads. Four voices from 2023 to 2026 threads make the case.

“We're a small SaaS company and are currently looking at potential customers and competitors but there is very little info on the specific software ...” – r/Entrepreneur

“Service titan was costing 300-350 per tech per month at shop I was managing. It was expensive, but it is the best program I've touched. I use Housecall pro now and it's 180 a month I think all in.” – r/HVAC

“Field Edge also boasts excellent QuickBooks integration.” – r/HVAC

“I'm a solo real estate agent looking for a CRM to help manage my leads, client interactions, and transactions.” – Reddit, real estate agent thread

Read them as data. The founder cannot find the software a customer runs. The operator names a price and an integration. The broker lists three jobs, leads, clients and transactions, that map onto three slots in the real estate stack. The stack is already in the question; it just is not in any lookup.

Turn the map into a decision by reading three things together: a loud slot, thin supply for that slot and a workaround you can name. A loud slot with deep supply is a fight. A thin slot nobody complains about is a hobby. Use the rules below, then test with owners.

• Loud and thin: rare in reviewed categories, so use the gap score to find it. Laundry and dry cleaning scores 97.1 with 73 software products. Worth five interviews.
• Loud and crowded: Appointment Scheduling at 5.1% with 290+ products and 104 micro-SaaS in the Stripe Index. Only a narrow segment, such as regulated scheduling at 8.0% to 8.3%, is open.
• Integration pain: the join between two slots. 12.7% of real estate reviews, 11.3% of scheduling reviews and 9.1% of field service reviews mention integrations. The wedge is a bridge, not a replacement for either side.
• Workaround alive: spreadsheets appear in 2.4% of field service reviews and 2.0% of real estate reviews, and 44.0% of businesses for sale run on spreadsheets or paper. Your competitor is a habit, so price against a free spreadsheet.

Two things this method cannot tell you: market share of any named product, and what one specific shop pays. For the first, you need vendor-reported figures. For the second, you need the owner. To choose which trade to test first, use how to choose a SaaS niche and the saturation check. To size the operator pool, start from home service businesses ranked by real earnings and the SaaS saturation study.

Every number on this page comes from a live read-only query run on November 14, 2026, or from the sources named. Corpus counts are rounded and carry a plus sign; small counts are exact.

More ranked guides in this series: best tools to research a real estate software idea, best tools to find a SaaS niche and best tools to estimate market size for SaaS. Vertical and buyer guides: best tools to research a fintech software idea, best tools to research a scheduling software idea, best tools to research an HR or payroll software idea and best tools to research a healthcare software idea.

Industry software research FAQ

Working on a specific trade? Scan it in BigIdeasDB or read how to find competitors for a startup idea.