Jobsite and field management app for plan viewing and markup, task/punch-list management, and sheet compare, with a free tier for small crews and a paid REST API add-on for larger teams.
The rare transparent-pricing entry in this batch -- free Basic for up to 5 users/3 projects, then a published $39/$64/$89 per-user/month ladder to Pro/Business/Business Plus -- but the REST API is a paid add-on gated behind a sales conversation rather than a self-serve token.