ATTOM Property Navigator vs CompStak

ATTOM Property Navigator has no write-up on Specifiction yet; its figures are above.

CompStak provides commercial real estate lease, sale, loan, and property data collected from professionals and reviewed by CRE analysts. Coverage spans major commercial property types in 105 markets. Lease records can include net effective rent, free rent, tenant improvements, and escalations; sale records can include cap rate, NOI, buyer and seller, and price per square foot. CompStak Exchange is a free, analyst-reviewed comps platform: contributors submit deals to access comparable data. It includes team comp storage, market trends, rent heat maps, alerts, and prospecting tools for lease activity and expirations. CompStak One adds analytics, portfolio analysis, AI Market Summary, and natural-language comp search with CompScout. Rent Predictor estimates starting rent for office or industrial spaces, including vacant spaces and new construction, using building, competitive set, square footage, and floor. Agent Connect links verified CompStak data with internal data in AI tools including Claude, Gemini, ChatGPT, and Copilot. APIs, bulk feeds, and custom MCP delivery are available; API capabilities include market, property, and space insights plus property matching and standardization. Exchange is free with contributions; paid access starts at $199.99/mo (annual).