Vertical SaaSA serious build1 evidence point

Compliance Checker for One Regulated Trade

Turn a rulebook nobody reads into a checklist that flags what is wrong before an auditor does.

$80–$500 per customer, per month

Overview

What this is

A tool that ingests the documents or records a regulated business already produces and checks them against the rules that apply — missing disclosures, expired certifications, records outside a retention window, fields that must be present. Not legal advice: a mechanical pre-audit that catches the obvious failures.

The problem it solves

Regulated businesses are audited against rules that live in long documents nobody has time to internalise. The failures that get caught are usually mechanical — a missing signature, a lapsed certificate — and the cost of missing them is out of proportion to how boring they are to check.

Why now

Language models are genuinely good at checking a document against a specification, which is the exact shape of this problem. The regulation itself is the moat: it changes rarely enough to be tractable and often enough that no incumbent has commoditised the niche ones.

The evidence

  • Vertical compliance tooling is listed at $30K–$500K ARR potential and described as boring, painful and sticky — with regulation itself acting as the competitive moat.

    Flowjam — Indie Hacker SaaS Ideas →

What to watch out for

Be extremely clear that you are a checklist, not a compliance guarantee — put it in the product, not just the terms. You also cannot build this credibly in an industry you do not know, so either pick your own or find a partner who lives in it.

A sensible starting stack

An LLM API, Document parsing, Postgres, Any web stack

Keywords: compliance, regtech, vertical saas, audit, document checking, regulated industries