01
Execution
L2 / L3, rollups, app-chains and the rails beneath them — the layers everything else runs on.
- Rollups
- App-chains
- Sequencing
Onchain venture fund · ETH + SOL
Conviction is a long exposure.
Cylus Capital backs pre-seed and seed founders building on ETH and SOL — and stays with them while the cycle turns.
ETH· block
— — —
SOL· slot
— — —
The fixed point
The market is a rotating sky. Narratives rise, peak and set, and most capital spins right along with them. We'd rather be the fixed point. Cylus writes early checks into founders building on ETH and SOL, and holds through every phase of the cycle — the loud months and the quiet ones.
01 — Coverage
One ring. Two chains.
Our mark has always been two arcs. So is our thesis: we back builders on both chains, with the same conviction and the same patience.
ETH
The settlement layer.
Rollups, restaking and the deepest liquidity in DeFi. We back the teams scaling ETH's execution and the apps that settle on it.
- L2 / L3
- Restaking
- DeFi
SOL
The throughput layer.
One fast global state, consumer apps and markets that clear in under a second. We back the teams turning SOL's speed into products people use every day.
- Execution
- Consumer
- Markets
Two chains. One conviction.
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02 — Thesis
What we back.
Pre-seed to seed. The protocols, markets and plumbing that builders on both chains depend on.
02
Markets
Onchain markets and primitives that clear without permission — AMMs, perps, lending and stable rails.
- AMMs
- Perps
- Lending
03
Infrastructure
Indexers, oracles, tooling — the unglamorous middle every builder quietly depends on.
- Indexers
- Oracles
- Dev tooling
- Round
- Open
- Stage
- Pre-seed → Seed
- Chains
- ETH + SOL
- Warm intro
- Not required
04 — Portfolio
The first checks are being written.
No portfolio to inflate yet. Companies appear here when they join — not a day before.
05 — Submit
Show us what you're building.
It goes straight to a human. No warm intro, no deck, no auto-reply pretending to be a person.
- 1
Send it
Two minutes. What it is, why now, where to reach you.
- 2
A human reads it
Every submission is read by a person, not scored by a bot.
- 3
We talk
If it fits the thesis, we reach out on the contact you left.
- 4
We commit
Capital goes out onchain — and we stay through the cycle.