CompStak

Crowdsourced CRE data platform providing verified lease comps, sale comps, CMBS/loan data, and property analytics across 105 US markets. Brokers and appraisers submit executed deal data to the free Exchange in return for credits; investors and institutions access the full dataset via CompStak One (enterprise). Recently launched CompStak AI with natural language search, rent prediction, and AI-generated market reports layered on top of its proprietary data.

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Free TierAPI
When to use it

Use when underwriting a CRE deal, valuing an asset, or conducting market research and you need actual executed lease comps, not asking rents. CompStak's crowdsourced model surfaces granular deal economics (starting rent, free rent, TI, escalations, term) that aren't publicly available anywhere else. The AI layer (Rent Predictor, CompScout) lets you query that data conversationally and generate market summaries without manual comp pulling.

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