Sirion

SOVRA (formerly mdf commerce) is a public-sector procurement platform that unites the Periscope, Bidnet Direct and MERX brands. It provides source-to-contract and procure-to-pay tools for state and local agencies, including sourcing and bid management, supplier onboarding with certification and diversity tracking, contract management, and purchase orders and receipts. SOVRA reports serving more than 7,000 public-sector agencies across North America.

Mercell is a Norway-based public procurement platform that acquired the Dutch vendor Negometrix, whose contract management module was sold in the U.S. The platform covers tendering, supplier relationship management and contract management for public buyers, primarily in Europe. U.S. presence is thin: GovSpend shows one U.S. local customer.

Biddingo is an online procurement platform that connects public sector buyers with vendors and suppliers for tenders and RFPs. The system lets agencies create and publish eRFX bid documents, collect requisition approvals, and manage online bid evaluations. It also supports contract management with change orders and reminders, vendor prequalification, and cooperative purchasing arrangements. A construction-specific module handles unit-price bidding for infrastructure contracts.