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A long-context reviewer that handles proposal writing end to end and hands a human the exceptions rather than the queue. Aimed at construction owner-operators, replacing the spreadsheet that currently holds it together.
In short: Construction Proposal Builder is a long-context reviewer aimed at construction owner-operators, covering proposal writing. It scores 74/100 on AltF Ideas, carried by demand (96) and held back by feasibility (32). Typical pricing is $2.7k–$54k per customer per year, with a first version reachable in six to twelve months for $31k–$86k.
Construction teams lose proposals rebuilt from scratch that are 80% identical. A typical construction operation runs this on people, memory, and a shared spreadsheet. Whoever knows how it works becomes a single point of failure.
A long-context reviewer that sits beside the existing system, reads what it already produces, and closes proposal writing. Revenue is usage-based, which suits a buyer who wants the cost to track the value rather than the seat count.
| Total addressable market | $589M |
|---|---|
| Category growth (CAGR) | 17% |
| Annual contract value | $2.7k – $54k |
| Pricing model | Usage-based |
| Time to first revenue | 46 days |
| Startup cost to MVP | $31k – $86k |
| Build effort | 6-12 months |
Million-token context windows made whole-document reasoning possible in one pass. Construction is growing at roughly 20% 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 |
| The incumbent suite | Sells a platform; this job is one neglected module inside it |
| A spreadsheet | The real incumbent in most of the market, and it is free |
Integrations with the incumbent system of record are undocumented and gatekept.
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