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A document parser that handles invoicing end to end and hands a human the exceptions rather than the queue. Aimed at legal solo practitioners, writing down what only one person knows.
In short: Legal Invoice Engine is a document parser aimed at legal solo practitioners, covering invoicing. It scores 83/100 on AltF Ideas, carried by monetisation (93) and held back by moat (71). Typical pricing is $4.5k–$96k per customer per year, with a first version reachable in a weekend for $2.0k–$5.0k.
Legal teams lose invoices assembled from four systems by hand. The work sits between two systems that were never designed to talk. The cost is invisible on any P&L line, which is why it never gets fixed.
Invoicing handled by a document parser, with a human signing rather than writing. Revenue is per-outcome, which suits a buyer who wants the cost to track the value rather than the seat count.
| Total addressable market | $733M |
|---|---|
| Category growth (CAGR) | 11% |
| Annual contract value | $4.5k – $96k |
| Pricing model | Per-outcome |
| Time to first revenue | 64 days |
| Startup cost to MVP | $2.0k – $5.0k |
| Build effort | Weekend |
Document parsing stopped needing per-layout templates. Legal is growing at roughly 12% a year, and this job has not been re-tooled since it was designed around paper.
| Who | The gap |
|---|---|
| A generalist AI tool | No domain grounding, so output needs full human review |
| An internal hire | Works until volume doubles, then breaks again |
| A vertical competitor | Priced and scoped for enterprise accounts, not this segment |
Accuracy is unforgiving here — one wrong output costs more than the subscription.
An idea you cannot act on is entertainment. Four concrete steps, wired to tools already running on AltFTool.
Score problem urgency, willingness to pay, and reachable audience size before writing any code.
→ AltF IdeaLabAsk how they handle this today and what it costs them. If nobody can quantify the pain, the demand score is optimistic.
→ Survey BuilderCheck availability, DNS, and email authentication in one pass so your first outreach lands in an inbox.
→ AltF DomainOpsStand up intake, the review queue, and billing before you build the clever part.
→ AltF Flow