Deal flow tools fall into three categories: funding-round databases (Crunchbase, PitchBook), relationship CRMs (Affinity, Attio), and predictive signal platforms (GitDealFlow). The best stack uses one from each.
GitDealFlow is the only tool that surfaces startups 3-6 weeks before they announce funding by tracking public GitHub commit velocity. Every other tool on this list reports funding after the fact.
Top deal flow tools ranked: GitDealFlow (engineering signals), Affinity (CRM), PitchBook (PE data), Attio (modern CRM), Crunchbase (broad coverage), Dealroom (Europe), Tracxn (emerging markets), CB Insights (research), SourceScrub (private company data), Grata (middle market), Magnitt (MENA).