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A narrow long-context reviewer scoped to proposal writing alone — no platform, no migration, no six-month rollout. Aimed at legal paralegal teams, closing the loop while everyone is asleep.
In short: Legal Proposal Builder on Long context is a long-context reviewer aimed at legal paralegal leads, covering proposal writing. It scores 74/100 on AltF Ideas, carried by moat (91) and held back by feasibility (27). Typical pricing is $2.4k–$42k per customer per year, with a first version reachable in six to twelve months for $33k–$108k.
Legal teams lose proposals rebuilt from scratch that are 80% identical. A typical legal operation runs this on people, memory, and a shared spreadsheet. It scales linearly with headcount, so growth makes it worse rather than better.
Proposal writing handled by a long-context reviewer, with a human signing rather than writing. Revenue is per-matter, which suits a buyer who wants the cost to track the value rather than the seat count.
| Total addressable market | $1.7B |
|---|---|
| Category growth (CAGR) | 10% |
| Annual contract value | $2.4k – $42k |
| Pricing model | Per-matter |
| Time to first revenue | 44 days |
| Startup cost to MVP | $33k – $108k |
| Build effort | 6-12 months |
Million-token context windows made whole-document reasoning possible in one pass. 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 vertical competitor | Priced and scoped for enterprise accounts, not this segment |
| A generalist AI tool | No domain grounding, so output needs full human review |
| An internal hire | Works until volume doubles, then breaks again |
Trust has to be earned before anyone lets this run unsupervised.
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