Buildium is a cloud-based property management platform aimed at professional residential property managers and community association managers running portfolios from a few dozen up to thousands of units. It brings the whole operation into one system: accounting built specifically for property management with trust accounting, bank reconciliation, and owner and vendor payments; leasing with listing syndication, applicant screening, and e-signed leases; a maintenance workflow with work orders, vendor assignment, and inspections; online rent payments; and tenant, owner, and board member portals for communication and self-service. For association managers it adds features like violation tracking, architectural requests, and board approval workflows. Buildium also offers analytics, a resident benefits package, and an open API and marketplace of integrations. It is owned by RealPage but operates as its own product line focused on the small and mid-sized management segment rather than large institutional multifamily. Buildium is consistently rated among the leading products in its category by software review sites. It is sold as a paid monthly subscription with tiers that unlock more features and lower per-transaction fees, priced primarily by the number of units under management, with a minimum monthly fee and add-on pricing for some services.