Seam is a finished, self-hosted B2B platform for two companies that work together: one hands out the work, the other does it, and both look at the same record instead of two spreadsheets and a WhatsApp thread. Each order carries its own status pipeline, the terms both sides accepted, the documents and e-signatures, the invoice and its payment. Every change is dated and attributed, so "when did we agree that" has an answer. Built for small and mid-sized firms in construction, logistics, e-commerce fulfilment, vehicle import, agriculture and general subcontracting. Ships with 28 opt-in trade packs, per-country VAT, tax and filing data for 15 countries, and a complete interface in 13 languages. Python and vanilla JavaScript. Flask and waitress are the only two dependencies. No database server, no front-end build, no third-party services required. 2,204 automated checks pass against a real server. When one company subcontracts to another, the job lives in two places. The buyer has it in their spreadsheet, the contractor has it in theirs, and the agreement itself is somewhere in a mail thread. Nobody can say what was agreed, when the status changed, or who approved the extra work, so every dispute becomes an argument about whose version is right. Following the Github link you can see everything related to the platform in detail, also you can give it a test with demo account! Sold as-is: a complete codebase with no users and no revenue. Priced accordingly. This project has exceptional capacity and real potential, for a well developed useful tool with great working capacity and opportunity for global development with the right approach, marketing and monetization.