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Engineering acceleration
The change in the number of unique contributors to a startup's GitHub repository over time. Contributor growth is estimated by comparing recent six-week commit volume to the prior six-week period. A rising contributor count often signals team expansion — either through new hires, contractors, or open-source community adoption. For investors, contributor growth is a proxy for whether a startup is scaling its engineering team, which often follows a funding round.
Formal signal definition
Contributor Growth is also a formal signal primitive in the VC Deal Flow Signal methodology, with a published formula, decision rule, and pitfall analysis.
Read the signal definition →Metrics, signal types, and decision rules from the methodology.
The named mechanism behind VC Deal Flow Signal.
The total number of commits to a startup's most active public GitHub repository over a rolling 14-day window.
The percentage change in commit velocity compared to the preceding 14-day window.
A sustained increase in a startup's engineering output relative to its own historical baseline.
Any data-driven indicator that helps an investor identify a promising startup before traditional deal sourcing channels surface it.
A signal type indicating that a startup's contributor growth rate exceeds 50% in a short window.
A signal type indicating that a startup has created three or more new public repositories in 30 days.
A signal type indicating that a startup's commit velocity has increased 150% or more versus its baseline.
This definition is published under CC BY 4.0. Cite as:
The Data Nerd. "Contributor Growth." VC Deal Flow Signal Glossary, https://signals.gitdealflow.com/define/contributor-growth.
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