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Live·Triforce·2025

Doorline

The investor's terminal for US residential rentals

/ overview

Type an address, get a full underwriting in seconds — cap rate, DSCR, 30-year wealth projection, comps, and a Claude-written investment memo. The deal finder maps live listings on Mapbox with clustering.

An embedded AI assistant runs read-only SQL on the user's portfolio, fetches live market data, and emits chart specs the UI renders inline. The same pipeline is exposed as a Stripe-metered public API.

/ what it does

  • Deterministic investment-metrics engine (cap rate, DSCR, 30-yr projection)
  • Claude-written investment memos with risks & opportunities
  • Live deal finder with Mapbox clustering
  • AI assistant with read-only SQL and tool-driven 'Live canvas'
  • Metered REST API with Stripe billing meter
  • Better-Auth (email + GitHub + Google) and Sentry observability