6 Best VC Screening Tools to Filter Startups [2026]

VC screening tools help you filter thousands of startups down to the 20 worth a partner meeting. The best tools go beyond filters — they score startups on signals that predict success.

GitDealFlow screens startups on engineering momentum: commit velocity, contributor growth, and repo expansion. These signals correlate with team execution speed, which is the #1 predictor of Series A success.

Other screening tools: Affinity (relationship scoring), Crunchbase (filters on funding and stage), Dealroom (signal scoring), SourceScrub (private company scraping), and Grata (industry-specific screening).

FAQ

What signals predict startup success?

Academic research (including SSRN preprints on GitHub momentum) shows engineering velocity, contributor growth, and code quality correlate with fundraising success and long-term outcomes. GitDealFlow operationalizes these signals.

How do I build a screening workflow?

Start with GitDealFlow's weekly trending list. Filter by sector and momentum score. Export the top 20 to a spreadsheet. Cross-reference with Crunchbase for funding stage. Reach out to the top 5 each week.

Does GitDealFlow score startups?

Yes. Each startup has a momentum score based on commit velocity relative to its sector peers. Top-quartile momentum predicts fundraises 3-6 weeks out with meaningful accuracy.

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