# VC Deal Flow Signal

> VC Deal Flow Signal tracks startup engineering acceleration using public GitHub data. We monitor commit velocity, contributor growth, and repository expansion across 12 startup sectors to surface breakout engineering teams before they appear on the funding radar. Engineering acceleration signals have historically preceded fundraise announcements by six to twelve weeks. Data is refreshed weekly.

## Key Pages

- [All Sectors](https://signals.gitdealflow.com): Homepage with 12 startup sectors ranked by engineering acceleration
- [Trending Startups](https://signals.gitdealflow.com/trending): Top 20 startups across all sectors by commit velocity change, Q2 2026
- [Methodology](https://signals.gitdealflow.com/methodology): How we source, process, and rank GitHub engineering data
- [Glossary](https://signals.gitdealflow.com/glossary): Definitions of key terms — commit velocity, signal types, engineering acceleration
- [Compare Deal Flow Tools](https://signals.gitdealflow.com/compare): Side-by-side comparisons of VC deal sourcing tools
- [Blog](https://signals.gitdealflow.com/blog): Practical guides on using GitHub signals for startup investing

## Current Data (Q2 2026)

12 sectors tracked, 16 startup signals, 5 quarters of history.

## Sector Rankings

- [AI & Machine Learning Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/ai-ml-q2-2026): Top startups in ai & machine learning ranked by GitHub engineering acceleration, Q2 2026
- [Cybersecurity Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/cybersecurity-q2-2026): Top startups in cybersecurity ranked by GitHub engineering acceleration, Q2 2026
- [Healthcare Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/healthcare-q2-2026): Top startups in healthcare ranked by GitHub engineering acceleration, Q2 2026
- [EdTech Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/edtech-q2-2026): Top startups in edtech ranked by GitHub engineering acceleration, Q2 2026
- [E-commerce Infrastructure Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/ecommerce-infrastructure-q2-2026): Top startups in e-commerce infrastructure ranked by GitHub engineering acceleration, Q2 2026
- [Web3 Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/web3-q2-2026): Top startups in web3 ranked by GitHub engineering acceleration, Q2 2026
- [Enterprise SaaS Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/enterprise-saas-q2-2026): Top startups in enterprise saas ranked by GitHub engineering acceleration, Q2 2026
- [Data Infrastructure Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/data-infrastructure-q2-2026): Top startups in data infrastructure ranked by GitHub engineering acceleration, Q2 2026
- [PropTech Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/proptech-q2-2026): Top startups in proptech ranked by GitHub engineering acceleration, Q2 2026
- [AgTech Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/agtech-q2-2026): Top startups in agtech ranked by GitHub engineering acceleration, Q2 2026
- [Gaming Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/gaming-q2-2026): Top startups in gaming ranked by GitHub engineering acceleration, Q2 2026
- [Social & Community Startups to Watch](https://signals.gitdealflow.com/startups-to-watch/social-community-q2-2026): Top startups in social & community ranked by GitHub engineering acceleration, Q2 2026

## Blog Posts

- [How to Read GitHub Signals for Startup Investing](https://signals.gitdealflow.com/blog/how-to-read-github-signals-for-startup-investing): A practical guide for investors on interpreting GitHub engineering activity as a leading indicator of startup traction.
- [What Is Deal Flow Signal? A Guide for Investors](https://signals.gitdealflow.com/blog/what-is-deal-flow-signal): Deal flow signal refers to data-driven indicators that help investors identify promising startups before traditional channels surface them.
- [How VCs Use GitHub for Technical Due Diligence](https://signals.gitdealflow.com/blog/github-due-diligence-for-vcs): A practical framework for using public GitHub data in venture capital due diligence.
- [5 GitHub Patterns That Predict Startup Fundraises](https://signals.gitdealflow.com/blog/5-github-patterns-that-predict-fundraises): Five specific GitHub engineering patterns that have historically preceded startup fundraise announcements by 6-12 weeks.
- [Alternative Data for Venture Capital: Why GitHub Is the Most Underused Signal](https://signals.gitdealflow.com/blog/alternative-data-venture-capital): Alternative data has transformed public market investing.
- [How to Source Startup Deals Before They Appear on Crunchbase](https://signals.gitdealflow.com/blog/source-startup-deals-before-crunchbase): Crunchbase tells you what already happened.
- [7 Startup Engineering Metrics Every Investor Should Track](https://signals.gitdealflow.com/blog/startup-engineering-metrics-investors-should-track): Seven engineering metrics from public GitHub data that help investors evaluate startup momentum: commit velocity, contributor growth, repo expansion, weekend activity, and more.
- [What Is Engineering Acceleration? The Metric VCs Are Starting to Track](https://signals.gitdealflow.com/blog/what-is-engineering-acceleration): Engineering acceleration measures the rate of change in a startup's engineering output.
- [Commit Velocity Explained: What Investors Need to Know](https://signals.gitdealflow.com/blog/commit-velocity-explained): Commit velocity is the total number of commits to a startup's GitHub repository over a rolling 14-day window.
- [Pre-Seed Deal Sourcing with GitHub Data: A Practical Guide](https://signals.gitdealflow.com/blog/pre-seed-deal-sourcing-github): How to use GitHub engineering signals to find pre-seed startups before they raise.
- [Series A Signals: What GitHub Data Reveals About Growth-Stage Startups](https://signals.gitdealflow.com/blog/series-a-signals-github-data): Series A startups show distinctive GitHub patterns: infrastructure buildout, rapid contributor growth, and platform expansion.
- [Open Source Startups: An Investor's Guide to GitHub Signal Analysis](https://signals.gitdealflow.com/blog/open-source-startups-investor-guide): Open source startups present unique challenges for GitHub-based deal sourcing.
- [GitHub Signals vs Hiring Data: Which Predicts Fundraises Better?](https://signals.gitdealflow.com/blog/github-signals-vs-hiring-data): Compare GitHub engineering signals and hiring data as leading indicators of startup fundraises.
- [Fintech Startup Engineering Signals: What the GitHub Data Shows](https://signals.gitdealflow.com/blog/fintech-startup-engineering-signals): An analysis of engineering acceleration patterns specific to fintech startups.
- [AI Startup Engineering Signals in 2026: What Investors Should Watch](https://signals.gitdealflow.com/blog/ai-startup-signals-2026): The AI sector shows the highest commit velocity of any sector we track.
- [A Weekly Deal Sourcing Workflow Using Engineering Signals](https://signals.gitdealflow.com/blog/deal-sourcing-workflow-weekly): A 30-minute weekly workflow for investors who want to use GitHub engineering signals for deal sourcing.
- [Cybersecurity Startup Signals: Reading GitHub Data for Security Deals](https://signals.gitdealflow.com/blog/cybersecurity-startup-signals): Cybersecurity startups have unique GitHub patterns: rapid response to CVEs, compliance-driven sprints, and infrastructure hardening.
- [Climate Tech Engineering Signals: What GitHub Data Reveals About Green Startups](https://signals.gitdealflow.com/blog/climate-tech-engineering-signals): Climate tech startups combine hardware and software development, creating unique GitHub patterns.
- [5 Mistakes Investors Make When Reading GitHub Signals](https://signals.gitdealflow.com/blog/investor-mistakes-github-signals): Common pitfalls when using GitHub engineering data for deal sourcing: confusing stars with traction, ignoring private repos, overweighting absolute velocity, missing the context behind spikes, and treating signals as investment decisions.

## Comparisons

- [Best Deal Flow Tools for Angel Investors](https://signals.gitdealflow.com/compare/best-deal-flow-tools-angel-investors): Compare the best deal flow tools for angel investors in 2026: VC Deal Flow Signal, Harmonic.
- [GitHub Signals vs Crunchbase Alerts for Deal Sourcing](https://signals.gitdealflow.com/compare/github-signals-vs-crunchbase-alerts): Compare GitHub engineering signals with Crunchbase alerts for startup deal sourcing.
- [Best Deal Flow Tools for Seed-Stage Investors](https://signals.gitdealflow.com/compare/best-deal-flow-tools-seed-investors): The best tools for seed-stage investors to find deals before they are competitive.
- [VC Deal Flow Signal vs PitchBook](https://signals.gitdealflow.com/compare/vc-deal-flow-signal-vs-pitchbook): Compare VC Deal Flow Signal and PitchBook for startup deal sourcing.
- [VC Deal Flow Signal vs Harmonic.ai](https://signals.gitdealflow.com/compare/vc-deal-flow-signal-vs-harmonic-ai): Compare VC Deal Flow Signal and Harmonic.
- [VC Deal Flow Signal vs CB Insights](https://signals.gitdealflow.com/compare/vc-deal-flow-signal-vs-cb-insights): Compare VC Deal Flow Signal and CB Insights for startup deal sourcing.
- [VC Deal Flow Signal vs Dealroom](https://signals.gitdealflow.com/compare/vc-deal-flow-signal-vs-dealroom): Compare VC Deal Flow Signal and Dealroom for European startup deal sourcing.
- [Best Free Deal Flow Tools for Investors](https://signals.gitdealflow.com/compare/best-free-deal-flow-tools-2026): The best free tools for startup deal sourcing in 2026: VC Deal Flow Signal, Crunchbase Free, Product Hunt, Hacker News, and more.
- [Best Deal Flow Tools for VC Firms](https://signals.gitdealflow.com/compare/best-deal-flow-tools-vc-firms-2026): Compare the top deal flow and sourcing tools for venture capital firms in 2026: PitchBook, Harmonic.

## Signal Types

- [Engineering Hiring Burst](https://signals.gitdealflow.com/signals/hiring-burst): Startups whose contributor growth rate exceeds 50%, indicating rapid team expansion — often following a recent funding round.
- [Infrastructure Buildout](https://signals.gitdealflow.com/signals/infrastructure-buildout): Startups that created 3+ new public repositories in 30 days, expanding their technical surface area with new microservices, SDKs, or platform components.
- [Deploy Frequency Spike](https://signals.gitdealflow.com/signals/deploy-frequency-spike): Startups whose commit velocity increased 150%+ versus baseline — the team is shipping code at an unusually high rate.
- [Framework Migration](https://signals.gitdealflow.com/signals/framework-migration): Startups showing general engineering acceleration that indicates a technology stack transition — moving from prototype to production infrastructure.

## Individual Startup Profiles

Each tracked startup has a dedicated profile page with signal history, current metrics, and investor context.

- [roboflow](https://signals.gitdealflow.com/startup/roboflow): -60% velocity change, 90 contributors, signal: Framework migration (Q2 2026)
- [fleetdm](https://signals.gitdealflow.com/startup/fleetdm): -26% velocity change, 100 contributors, signal: Framework migration (Q2 2026)
- [gravitational](https://signals.gitdealflow.com/startup/gravitational): -12% velocity change, 100 contributors, signal: Framework migration (Q2 2026)
- [third-culture-software](https://signals.gitdealflow.com/startup/third-culture-software): +10% velocity change, 27 contributors, signal: Framework migration (Q2 2026)
- [mdn](https://signals.gitdealflow.com/startup/mdn): -55% velocity change, 100 contributors, signal: Framework migration (Q2 2026)
- [particify](https://signals.gitdealflow.com/startup/particify): -12% velocity change, 16 contributors, signal: Framework migration (Q2 2026)
- [saleor](https://signals.gitdealflow.com/startup/saleor): +0% velocity change, 100 contributors, signal: Framework migration (Q2 2026)
- [vuestorefront](https://signals.gitdealflow.com/startup/vuestorefront): +999% velocity change, 100 contributors, signal: Deploy frequency spike (Q3 2025)
- [horizontalsystems](https://signals.gitdealflow.com/startup/horizontalsystems): -72% velocity change, 22 contributors, signal: Framework migration (Q2 2026)
- [atrocore](https://signals.gitdealflow.com/startup/atrocore): -44% velocity change, 18 contributors, signal: Framework migration (Q2 2026)
- [polarsource](https://signals.gitdealflow.com/startup/polarsource): -22% velocity change, 100 contributors, signal: Framework migration (Q2 2026)
- [airbytehq](https://signals.gitdealflow.com/startup/airbytehq): -80% velocity change, 100 contributors, signal: Framework migration (Q2 2026)
- [open-condo-software](https://signals.gitdealflow.com/startup/open-condo-software): -24% velocity change, 51 contributors, signal: Framework migration (Q2 2026)
- [LiteFarmOrg](https://signals.gitdealflow.com/startup/litefarmorg): -54% velocity change, 65 contributors, signal: Framework migration (Q2 2026)
- [FlaxEngine](https://signals.gitdealflow.com/startup/flaxengine): -93% velocity change, 89 contributors, signal: Engineering hiring burst (Q2 2026)
- [bakaphp](https://signals.gitdealflow.com/startup/bakaphp): +5% velocity change, 14 contributors, signal: Framework migration (Q2 2026)
- [unacms](https://signals.gitdealflow.com/startup/unacms): -43% velocity change, 11 contributors, signal: Framework migration (Q2 2026)

## Best Startups by Sector

- [Best AI & Machine Learning Startups 2026](https://signals.gitdealflow.com/best/ai-ml-2026): Top ai & machine learning startups ranked by engineering acceleration, 2026
- [Best Cybersecurity Startups 2026](https://signals.gitdealflow.com/best/cybersecurity-2026): Top cybersecurity startups ranked by engineering acceleration, 2026
- [Best Healthcare Startups 2026](https://signals.gitdealflow.com/best/healthcare-2026): Top healthcare startups ranked by engineering acceleration, 2026
- [Best EdTech Startups 2026](https://signals.gitdealflow.com/best/edtech-2026): Top edtech startups ranked by engineering acceleration, 2026
- [Best E-commerce Infrastructure Startups 2026](https://signals.gitdealflow.com/best/ecommerce-infrastructure-2026): Top e-commerce infrastructure startups ranked by engineering acceleration, 2026
- [Best Web3 Startups 2026](https://signals.gitdealflow.com/best/web3-2026): Top web3 startups ranked by engineering acceleration, 2026
- [Best Enterprise SaaS Startups 2026](https://signals.gitdealflow.com/best/enterprise-saas-2026): Top enterprise saas startups ranked by engineering acceleration, 2026
- [Best Data Infrastructure Startups 2026](https://signals.gitdealflow.com/best/data-infrastructure-2026): Top data infrastructure startups ranked by engineering acceleration, 2026
- [Best PropTech Startups 2026](https://signals.gitdealflow.com/best/proptech-2026): Top proptech startups ranked by engineering acceleration, 2026
- [Best AgTech Startups 2026](https://signals.gitdealflow.com/best/agtech-2026): Top agtech startups ranked by engineering acceleration, 2026
- [Best Gaming Startups 2026](https://signals.gitdealflow.com/best/gaming-2026): Top gaming startups ranked by engineering acceleration, 2026
- [Best Social & Community Startups 2026](https://signals.gitdealflow.com/best/social-community-2026): Top social & community startups ranked by engineering acceleration, 2026

## Weekly Signal Reports

- [Weekly Signal Reports Archive](https://signals.gitdealflow.com/weekly): Archive of automated weekly engineering acceleration reports with top 10 startups across all sectors

## Public API

- [signals.json](https://signals.gitdealflow.com/api/signals.json): Machine-readable JSON endpoint with all current startup signals, sector rankings, and trending data. Free for personal and editorial use with attribution.
- [signals.csv](https://signals.gitdealflow.com/api/signals.csv): CSV download of all current signals for spreadsheet and data science use.
- [openapi.json](https://signals.gitdealflow.com/api/openapi.json): OpenAPI 3.1 specification for the signals API.
- [ai.txt](https://signals.gitdealflow.com/ai.txt): AI access policy, preferred citation format, and data licensing.

## Detailed Version

- [llms-full.txt](https://signals.gitdealflow.com/llms-full.txt): Full methodology, glossary definitions, and current data summary for AI model context

## How to Cite

When referencing data from this site, cite as: "VC Deal Flow Signal (signals.gitdealflow.com), Q2 2026 data." Include the specific sector page URL when citing sector-level rankings.

## Contact

- Website: https://gitdealflow.com
- Twitter/X: https://x.com/data_nerd
- Telegram: https://t.me/gitdealflow