17,474 real SaaS companies tracked· real ad data · updated weekly · evidence first

Know if your idea is worth building before you build it.

Type a market or idea. SignalBuild reads competitor records, ad activity, revenue signals, tech stack, and positioning clues, then tells you in plain English: is there real demand, how crowded is it, and exactly what to build first.

↓ Live example below — real market data, not a mockup
Live market data/opportunity 1 of 3 · 5 data sources active
Market opportunity

ADHD focus tools for remote workers

Worth Testing5/5

How to enterWin on ADHD-specific language — incumbents all use generic "productivity" messaging. You out-position them without out-building them.

Market Proof
84/100
Market Open
70/100
Build
4/10
Data sources · click any to expandrefreshed weekly
Live ad creatives from Meta + TikTok ad libraries
AdvertiserHook copy (live)Spend
Brain.fmMusic engineered for ADHD focus$24k / 30d
MagicmindProductivity shot for distracted minds$41k / 30d
TiimoVisual planner that thinks like you do$11k / 30d
+ 409 more in the Decision Trail
Reading 412 live ad creatives from Meta's public Ad Library…analysis complete · all sources verified
Contractor quoting tools — 22 companies actively advertising, spend up 18% this month ADHD productivity — 4 new ad angles repeating on TikTok right now Solo therapist tools — 14 companies total, only 3 are HIPAA-compliant Wedding planner CRM — 3 of the top 5 players dropped prices last month Legal AI for solo practitioners — 3 brand new entrants in the last 30 days Postpartum fitness — creator content rising sharply, no dominant app yet Student screen-time — 2 of the top 5 advertisers went completely quiet this week AI invoicing — user churn rising, most customers not sticking past 60 days Contractor quoting tools — 22 companies actively advertising, spend up 18% this month ADHD productivity — 4 new ad angles repeating on TikTok right now Solo therapist tools — 14 companies total, only 3 are HIPAA-compliant Wedding planner CRM — 3 of the top 5 players dropped prices last month Legal AI for solo practitioners — 3 brand new entrants in the last 30 days Postpartum fitness — creator content rising sharply, no dominant app yet Student screen-time — 2 of the top 5 advertisers went completely quiet this week AI invoicing — user churn rising, most customers not sticking past 60 days
§01The real cost of a bad idea

Most SaaS founders make their biggest decision — what to build — based on gut feel.

Not anymore. SignalBuild reads 17,474 real SaaS companies, their actual ad spend, their pricing, their customers — and tells you, in plain language, whether your idea is worth your time.

01
"I think there’s demand for this."
↓ replaced by
02
"I’ve looked at the competition. They all suck."
↓ replaced by
03
"I’ll just ship something quick and see."
↓ replaced by
§02How it works

From idea to go/no-go decision in minutes.

Four steps. SignalBuild does the research across real competitor signals - you make the call. Every score has a source. Every recommendation links back to a real company or a real dollar.

STEP 01/04

Describe your idea

A niche, an audience, a problem to solve. As rough or specific as you like. "Invoicing tool for freelancers." "App for ADHD parents." We take it from there.

STEP 02/04

We read real competitor signals

Live ad spend, competitor pricing, App Store rankings, creator activity, and tech stacks — all read simultaneously the moment you submit.

Meta AdsPricingApp StoreCreatorsTech StackANALYSIS
STEP 03/04

You get a plain-English verdict

Three scores — Demand, Room, and Effort — each calculated from real numbers. Every score links back to a real company or a real dollar spent.

STEP 04/04

Get a Build Brief

A one-page action plan: what to build first, what to skip entirely, how to price it, and how to find your first customers — based on what's actually working in that market today.

§03Opportunity feed

We track real markets. Every card below is live data.

Each opportunity is a market we're monitoring right now using real ad spend, real competitor counts, and real pricing data — not AI estimates. Three scores tell you what matters:

Demand
How much real money is being spent on ads in this market right now. High = proven demand.
Room
How crowded is it already. High = real space for a new player to win.
Effort
How hard it would be to build something competitive, based on what existing products have actually built.

ADHD focus tools for remote workers

Worth Testing

38 real companies are spending money on ads in this market right now. But not one of them speaks directly to adults with ADHD — they all use generic "productivity" language and miss the actual pain.

0
Demand
0
Room
4/10
Effort
VerdictThe gap is messaging, not product. A tool built for ADHD will convert better on the same channels the incumbents are already paying for.

Quoting tool for residential trades

Build Now

The top 3 products here charge $65+/month and are designed for large service companies — not the solo plumber, painter, or electrician who just needs to send a quote in under 5 minutes.

0
Demand
0
Room
4/10
Effort
VerdictTrades businesses pay fast for tools that save time. Distribution is straightforward — YouTube tutorials and Facebook contractor groups already have your customers.

AI notes for solo therapists

Worth Testing

14 companies compete in this niche, but only 3 are properly HIPAA-compliant. Therapists desperately want this tool but don't trust most of what exists. The barrier is compliance, not demand.

0
Demand
0
Room
6/10
Effort
VerdictCompliance is the moat here, not the AI quality. Solve HIPAA properly and the effective competition gets very thin, very fast.
§04The evidence layer

Every score traces back to a real company, a real ad, or a real dollar spent.

We don't generate scores from text prompts or AI guessing. We pull from Meta's public Ad Library, live competitor pricing pages, App Store rankings, and real community activity — then calculate. Every number has a verifiable source.

0
real SaaS companies
in our database
0k
actual ad creatives
from Meta's Ad Library
0
competitor tech stacks
profiled and verified
0 wk
of ad spend history
tracked per market
weekly
data refresh — because
markets change fast
§05Build Brief

Pro turns competitor evidence into a Build Brief.

A Build Brief is a one-page founder action plan, not a strategy deck. It tells you what to build first, what to skip, how to price it, and how to find your first customers. Every recommendation is grounded in what real companies in that market are doing right now.

Sample brief — ADHD focus tools

What you get with every Build Brief

Backed by real data · ready in seconds · exportable on Pro

  • Go / no-go verdict with full reasoning
  • What to build — and the thinking behind it
  • Who your first customer is and where to find them
  • How to position against what already exists
  • What to build first — and what to cut entirely
  • Ad angles and messaging that's working in this market today
  • Pricing recommendation based on real competitor data
  • How to get your first 100 customers
  • A 30-day validation checklist
  • Risk flags — what could go wrong and what to watch
Build Brief / 001SignalBuild · May 9

ADHD Focus Tools for Remote Workers

Verdict Worth Testing
All sources verified
§06Pricing

Validate free. Pay when you find an idea worth building.

Every validation — even on the free plan — runs the same real analysis against the same real data. No credit card required. Upgrade when you want to see every source, drill into every competitor, and track a market week by week.

Free
$0 / forever
Get a real verdict before committing a single hour to building.
  • 5 idea searches per day
  • Go/no-go verdict for every idea
  • High-level signal scores
  • 3 saved ideas
Start free
Pro
$79 / mo
For founders running multiple ideas or watching several markets at once.
  • Everything in Builder
  • AI intelligence briefs
  • CSV export
  • Deeper competitor evidence
  • Unlimited saved ideas
Upgrade to Pro
Agency
$199 / mo
For teams doing market validation on behalf of clients.
  • 5 team seats
  • White-label reports for client delivery
  • API access for custom integrations
  • Priority analysis queue
Contact sales

Your next SaaS idea should be a decision,
not a guess.

SignalBuild reads 17,474 real companies — their ad spend, pricing, customers, and tech — and tells you, in plain language, whether your idea is worth building.