The 10 Best Chrome Extensions for VC Deal Flow (2026)

If you source venture deals, your browser is your office. This list covers the ten Chrome extensions that turn Crunchbase, LinkedIn, and GitHub from passive databases into an active deal-flow engine. Two are GitDealFlow's own (disclosed up front): the Crunchbase/Wellfound signal badge and the GitHub hover lookup, both free and both running on the 350+ startup public panel. The other eight, Affinity, Clearbit Connect, Hunter, LinkedIn Sales Navigator, BuiltWith, Save to Notion, Loom, and Grammarly, cover contact enrichment, relationship tracking, technical diligence, capture, and outreach. The closing section assembles the leanest free stack for a solo GP: discover, research, capture, reach out, follow up.

Key stats

2: Purpose-built signal extensions (The only two entries that generate a new leading indicator rather than organizing existing data)

350+: Startup orgs on the public panel (The GitHub activity panel behind both GitDealFlow extensions, refreshed weekly)

3-6 weeks: Median signal lead time (Engineering acceleration typically precedes fundraise announcements, per the SSRN methodology)

5: Extensions in the free solo-GP stack (Both GitDealFlow extensions + Hunter free tier + Save to Notion + Grammarly free)

References

[1] Engineering Acceleration as a VC Deal Flow Signal: SSRN

[2] VC Deal Flow Signal Methodology: GitDealFlow

[3] VC Deal Flow Signal, GitHub Startup Signals (Chrome Web Store): Chrome Web Store

[4] VC GitHub Lookup, Startup Signals on Hover (Chrome Web Store): Chrome Web Store