Best VCs for Open Source

12 venture capitalists actively investing in Open Source.

Active VCs

Funds

Deals

General Partner

Andreessen Horowitz (a16z)

Leads a16z's infrastructure practice and is one of Silicon Valley's most technically credible VCs, having built VMware NSX and pioneered software-defined networking. Invests 'from markets in' rather t

$1M-$100M+ (leads a16z's $1.25B+ infrastructure fund)

SeedSeries ASeries B

#2Chris Dixon

Founder, Managing Partner

a16z crypto

Chris invests behind blockchains as a new computing and ownership primitive for the internet. His core thesis is that token-enabled networks can align builders, users, and owners; bootstrap network ef

No personal check-size range is published. The official profile's aggregate fund-raising figure and public financing announcements describe firm resources and transactions, not Chris's individual authority or a reliable minimum/maximum check.

SeedEarly StageGrowth

#3Andy Weissman

Managing Partner

Union Square Ventures (USV)

Andy invests at the edge of large markets under transformative pressure. His long-running thesis work centers on engaged networks, differentiated user experience, and defensibility created by network

No personal check-size range is published. USV describes itself as an earliest-stage generalist investor and makes decisions collaboratively without a vote; round fit should be confirmed with the partnership rather than attributed to Andy alone.

Pre-SeedSeedSeries A

#4Alpin Yukseloglu

Partner, Investing & Research

Paradigm

Alpin partners with crypto founders and researchers who have strong instincts about the future and the courage to follow them. His work centers on protocol, market, and mechanism design—especially sys

Paradigm says it backs founders at every stage from first check through public markets, but it does not publish Alpin's personal check range or decision authority. A 2024 firm filing described vehicle investments from $1M to $100M or more; that historical firm range is not treated as his current personal range.

Pre-SeedSeedEarly Stage

#5Storm Slivkoff

Research Partner

Paradigm

Storm evaluates decentralized systems through high-resolution data, reproducible measurement, and open tooling. His work spans Ethereum state and history growth, node performance, market-volume accoun

No personal check range or investment authority is published for Storm. Paradigm invests from first check through public markets, but Storm's official remit is frontier data-science and data-engineering research, not a stated personal allocation range.

ResearchTechnical DiligencePortfolio Support

#6Jerry Chen

General Partner

Greylock Partners

Coined the 'Systems of Intelligence' framework in his landmark 2017 blog post 'The New Moats' — the idea that AI and data create competitive advantages by sitting between systems of record (databases)

$500K-$200M (sweet spot ~$25M)

SeedSeries ASeries B

#7Nick Grossman

Partner

Union Square Ventures (USV)

Nick's work connects open, decentralized systems with the infrastructure needed for the next computing cycle. His current 'Rebel Alliance' thesis argues that agentic AI will favor a modular ecosystem

No personal check-size range is published. USV invests at the earliest stages and supports companies throughout their journey; investment decisions are made collaboratively by discussion rather than individual vote.

Pre-SeedSeedSeries A

#8Brandon Reeves

Partner

Lux Capital

Brandon backs technical platforms and applications across software, AI, defense, and manufacturing. A recurring theme is open or developer-led infrastructure that turns frontier capability into produc

No verified personal or standard Lux check-size range is published. Brandon invests at both early and growth stages; disclosed financing rounds, such as Hugging Face's $15M Series A, are total rounds and not his personal allocation range.

SeedSeries AEarly Stage

#9Lucas Oliveira

Principal

Kleiner Perkins

Lucas invests in enterprise software and cybersecurity across early and growth stages. His portfolio connects foundation models, data and enterprise AI, open-source software security, managed security

No personal check range or signing authority is published. Lucas participates across early and growth investments; disclosed company financings should not be treated as his personal range.

SeedSeries AEarly Stage

#10Zao Chen

Principal

Craft Ventures

Zao invests in software with a particular focus on data and AI infrastructure and developer tools. His work favors open, interoperable or community-led platforms that become default infrastructure: te

No Zao-specific check range is public. His attributed deals span Series A through late growth, while Craft operates separate early-stage and growth funds. Founders should confirm current vehicle, ownership target and sizing through inquiries@craftventures.com rather than infer a range from individual announced rounds.

Series ASeries BSeries C

#11Zao Chen

Principal

Craft Ventures

Chen invests in software with a focus on data infrastructure, AI infrastructure, and developer tools. His work with Supabase shows a preference for technically trusted, developer-loved products whose

Firm-level public estimate: $500K-$3M at Seed, $3M-$10M+ at Series A/B, and $10M+ at Growth

SeedSeries ASeries B

#12Tal Shalom

Partner

Collider Ventures

Tal focuses on the overlap of open-source systems, smart contracts, and regulated real-world industries. His investment and legal lens asks whether decentralized technology can streamline insurance, p

$50K-$1M reported by external investor directories for Collider's early-stage strategy; founders should confirm current sizing directly with the firm.

Pre-SeedSeedEarly Stage

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