Nexus Mutual Review
On-chain capital pool, GPL-licensed
of 10
Nexus Mutual is a decentralised insurance alternative where members share risk, with all cover fees paid into an on-chain Capital Pool holding ETH, USDC and cbBTC. It is GPL-3.0 licensed, though no named audit could be verified on the pages read.
No money changes hands. This is a non-commercial project: no advertising, no sponsored placements, and no affiliate or referral links. Links to the services below earn us nothing. Every overall score is the plain average of the criteria shown on the page, so you can check the arithmetic yourself — see our rating methodology and how the site is funded.
Function
Member-owned decentralised insurance / risk sharing
Fees
All cover fees paid into the Capital Pool; no separate protocol fee
Backing
On-chain Capital Pool holding ETH, USDC and cbBTC
Licence
GPL-3.0
Audits
Not verified
Scores
Each criterion carries equal weight. The overall score is the average of these 5 scores — (7.0 + 10.0 + 3.0 + 9.0 + 5.0) ÷ 5 = 6.8.
Pros
- Function stated plainly: a decentralised insurance alternative where members share risk, buy cover, underwrite and assess claims
- All cover fees paid into the Capital Pool in full, with no separate protocol fee
- The Capital Pool is an on-chain contract holding ETH, USDC and cbBTC — verifiable backing
- GPL-3.0 licence on the smart contracts
Cons
- No named audit firm could be verified on the pages read
- The cover-pricing formula is not stated on the pages read
- DAO governance is referenced but its detail, including any timelock, is not stated
Backing you can inspect on-chain
Nexus Mutual states that the assets backing NXM are held in the Capital Pool contract, holding ETH, USDC and cbBTC. Because that pool is an on-chain contract rather than an off-chain reserve, the backing is directly verifiable rather than attested — the strongest form this criterion can take, and the reason the backing score is high.
A clear function and fee model
The protocol is described plainly as a decentralised insurance alternative where members join and share risk: they buy cover, underwrite risk, assess claims and build risk-management businesses. All cover fees are paid into the Capital Pool in full, with no separate protocol fee skimmed off — an unusually clean arrangement.
Open source, with gaps
The smart contracts are GPL-3.0. Against that, no named audit firm could be verified on the pages we read, and while DAO governance is referenced, its detail — including any timelock — is not stated. Both are noted plainly.
Who builds it
Nexus Mutual is a UK-based mutual: its supporting foundation is a community interest company, a legal form reserved for organisations run for community benefit, and members hold the NXM token that both governs the protocol and represents membership. Hugh Karp is named as its founder on the official governance forum. A limited-powers Board handles operational duties but can be replaced by member vote — a governance shape that mirrors the mutual-insurance model the protocol is built to reproduce on chain.
How it compares
Reserve
Tokenised index baskets under a permissive licence
Term Finance
Fixed-rate lending, six named audits, restrictive licence
dHEDGE
AGPL vaults with a deep audit list, now rebranding
Derive (formerly Lyra)
Options fees published in full, Sigma Prime audited
Maple Finance
Fee split published to the basis point
Goldfinch
On-chain credit, MIT, Trail of Bits audited
Index Coop
Per-product fees published, Apache-licensed
Synthetix
MIT-licensed with a published fee schedule
Ondo Finance
Thirteen named auditors on tokenised Treasuries
Sources
Scored from published primary sources rather than hands-on use. Every figure above comes from one of the pages below, on the date shown. Manufacturers change prices and specifications without notice — if something here no longer matches the source, tell us and we will correct it.
- 1.Nexus Mutual — overview — checked
- 2.Nexus Mutual — capital pool (backing) — checked
- 3.Nexus Mutual — smart contracts LICENSE (GPL-3.0) — checked
- 4.Nexus Mutual — documentation (UK CIC, DAO) — checked
Frequently asked questions
What backs Nexus Mutual?
The Capital Pool contract, an on-chain contract holding ETH, USDC and cbBTC, backs the NXM token and pays claims.
Does Nexus Mutual charge a protocol fee?
No separate protocol fee is stated. All cover fees are paid into the Capital Pool in full.
Nothing here is financial advice. Editorial policy · How we score · How we're funded.