Grant Street Group develops, hosts, and administers customized software applications to support various financial transactions related to revenue collection and auctions of fixed income instruments, tax deeds, and real estate for government entities and financial institutions. It offers TaxSys, a Web-based tax collection and billing system; LienAuction, a tax certificate auction system; BillExpress that allows tax collectors to email tax notices to taxpayers; DeedExpress, a Web-based tax deed application system; EscrowExpress, an escrow payment processing system, etc. In addition, it hosts online auctions of bonds, tax certificates, and other financial and legal instruments. Further, the Company offers development services, including private labeling, proprietary software licensing, software customization, site design, code enhancement, database support, security, and disaster recovery.