© SIREX CAPITAL 2026
Capital for Complex Systems.
We invest where complexity compounds — infrastructure, protocols, and systems that outlast cycles.
01 / THE THESIS
Value accrues at the
infrastructure layer.
Applications satisfy immediate needs, but infrastructure survives paradigm shifts. We bet on the rails, the protocols, and the settlement layers.
- Downside-limited, upside-unbounded.
- Asymmetry is designed, not accidental.
- Technical moats over marketing hype.
> LAYER_1: STABLE> LAYER_2: OPTIMIZING
02 / HOW WE OPERATE
Origin & Background
Built by operators, not financial observers.
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Ownership Model
Direct accountability. No committees.
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Synchronization
Zero latency between insight and action.
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03 / DETECTION & SIGNALS
Noise Filter
Narratives are lagging indicators. We look at commit frequency, developer migration, and on-chain behavior.
Code Audits
We read the repo before we read the pitch deck. Technical debt is a solvency risk.
Timing
Entering before consensus forms. Exiting (if ever) when utility saturates.
04 / Founder Interface
Clarity & Speed.
We respect the builder's time. Our process is designed to be rigorous but efficient.
01 / SIGNAL
Direct Access
02 / FILTER
Noise Reduction
03 / VERIFY
Deep Dive
04 / ALIGN
Long-Term Fit
05 / EXECUTE
Decision
05 /
FAQ
We primarily focus on Seed and Series A rounds, though we occasionally participate in pre-seed for exceptional teams. Our sweet spot is $500K-$5M checks.
Yes, we invest globally with a focus on teams building category-defining companies regardless of location. We have portfolio companies across North America, Europe, and Asia.
Our typical check size ranges from $500K to $5M for initial investments, with additional capital reserved for follow-on rounds in our best performing companies.
We provide deep technical expertise, access to our global network of category-defining founders, and strategic guidance on scaling infrastructure and protocol design.
Our process is designed for speed. After an initial call, we dive into technical substrate-level data. We typically make a decision within 24-48 hours of completing our technical review.
Why Sirex?
Structured for speed. Built by engineers. We remove friction so you can build the impossible.
Average Response Time
24 Hours
Technical Due Diligence
In-House
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06 /
Insights & Research
PROTOCOL DESIGN
Why Protocols Win Long-Term
Nov 14, 2025
INFRASTRUCTURE
AI Infrastructure Is the New Oil
Oct 02, 2025
TOKENOMICS
Designing Incentives in Decentralized Systems
Sep 28, 2025
STRATEGY
Speed as a Competitive Advantage
Aug 15, 2025