1
Hats Finance
hats.financeAlso covers bug bounty, security, and security tools · same kind of website
Hats Finance runs a decentralized marketplace for smart contract bug bounties and audit competitions.
Alternatives
The Best Immunefi Alternatives in 2026
24 alternatives0 free · 2 open source
Looking for something like Immunefi? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 2 are open source.
Immunefi connects crypto projects with security researchers through smart contract and crypto bug bounty programs.
Top picks at a glance
First suggestionHats FinanceHats Finance runs a decentralized marketplace for smart…Open source optionOpenZeppelinOpenZeppelin Contracts provides a library for secure smart…Another optionSigma PrimeSigma Prime audits smart contracts, zero-knowledge systems…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Hats Finance | — | Not stated | Web |
| 2 | Sigma Prime | — | Not stated | Web |
| 3 | Sherlock | — | Not stated | Web |
| 4 | HAPI ID | — | Not stated | Web |
| 5 | Ethernaut | — | Not stated | Web |
| 6 | Hexens | — | Not stated | Web |
| 7 | Instadapp | — | Not stated | Web |
| 8 | rekt | — | Not stated | Web |
| 9 | Nexus Mutual | — | Not stated | Web |
| 10 | Coinmerce Capital | — | Not stated | Web |
All Immunefi alternatives
2
Sigma Prime
sigmaprime.ioAlso covers security and security tools · same kind of website
Sigma Prime audits smart contracts, zero-knowledge systems, blockchain infrastructure, and off-chain code, and publishes security research.
3
Sherlock
sherlock.xyzAlso covers security and security tools · same kind of website
Sherlock offers Web3 security audits, contests, AI analysis, and bug bounties for smart contract projects.
4
HAPI ID
hapi.oneAlso covers security and security tools · same kind of website
HAPI uses cross-chain smart contracts to add security functions to decentralized finance products.
5
Ethernaut
ethernaut.openzeppelin.comAlso covers security and security tools · same kind of website
Each Ethernaut level requires hacking a smart contract in the Ethereum Virtual Machine through a Web3 and Solidity wargame.
6
Hexens
hexens.ioAlso covers security and security tools · same kind of website
Hexens audits blockchain systems and offers continuous threat exposure monitoring, alongside research on smart contract platform vulnerabilities.
7
Instadapp
instadapp.ioAlso covers security and security tools · same kind of website
InstaDapp develops DeFi tools, including the Fluid protocol and Avocado wallet for account and smart contract transactions.
8
rekt
rekt.news/leaderboardAlso covers security and security tools · same kind of website
Rekt publishes investigative journalism and commentary on crypto incidents, with a ranked archive of major blockchain losses.
9
Nexus Mutual
nexusmutual.ioAlso covers security and security tools · same kind of website
Nexus Mutual offers crypto cover for risks including hacks and describes itself as an alternative to insurance.
10
Coinmerce Capital
coinmerce.capital/en/homeAlso covers security and security tools · same kind of website
Coinmerce Capital presents managed crypto investment funds including Core, Frontier, and Yield.
11
Chainalysis
chainalysis.comAlso covers security and security tools · same kind of website
Chainalysis provides blockchain data and intelligence tools for investigating illicit activity, managing risk, and preventing crypto fraud.
12
CoinStats
coinstats.appAlso covers security and security tools · same kind of website
CoinStats tracks crypto portfolios across coins, exchanges, wallets, and blockchains, with tools to buy, swap, and stake assets.
13
CoinLedger
coinledger.ioAlso covers security and security tools · same kind of website
CoinLedger provides crypto tax preparation and forms, with support for exchanges, NFTs, DeFi, and cryptocurrency transactions.
14
EverRise
everrise.comAlso covers security and security tools · same kind of website
EverRise develops bridging and security applications for DeFi protocols across BNB Chain, Ethereum, Polygon, Fantom, and Avalanche.
15
Three Sigma
threesigma.xyzAlso covers security and security tools · same kind of website
Three Sigma audits blockchain code and DeFi systems, reporting security findings and services for Web3 projects.
16
STARK
starkware.coAlso covers security and security tools · same kind of website
StarkWare develops STARK proof technology for blockchain scalability, security, and privacy, with products including Starknet and StarkEx.
17
Trail of Bits
trailofbits.comAlso covers security and security tools · same kind of website
Trail of Bits publishes security reviews, research, open-source tools, and talks covering software, blockchains, and AI systems.
18
Zellic
zellic.ioAlso covers security and security tools · same kind of website
Zellic provides security assessments for emerging technologies, using offensive security research to identify software vulnerabilities.
19
FailSafe
getfailsafe.comAlso covers security and security tools · same kind of website
FailSafe builds continuous security testing systems that probe applications, APIs, infrastructure, and AI systems for exploitable issues.
20
Also covers security and security tools · open source
OpenZeppelin Contracts provides a library for secure smart contract development.
21
Also covers security and security tools · open source
Ethereum smart contracts can be fuzzed with Echidna, whose repository describes it as a fuzzer.
22
CryptoRank
cryptorank.io/portfolioAlso covers security and security tools · same kind of website
CryptoRank tracks crypto portfolios and provides market data and analytics for digital assets.
23
OpenZeppelin Defender
docs.openzeppelin.com/defenderAlso covers security and security tools · same kind of website
OpenZeppelin Defender is documented within the official OpenZeppelin library and tools documentation.
24
Tulipa Capital
tulipa.capitalAlso covers security and security tools · same kind of website
Tulipa Capital curates DeFi risk strategies and provides dashboards and partner information for its on-chain finance work.
No alternatives match this filter.
Alternatives to similar tools
OpenZeppelin Defender24 alternativesChainalysis24 alternativesSigma Prime24 alternativesNexus Mutual24 alternativesCoinmerce Capital24 alternativesThree Sigma24 alternatives
What is the best alternative to Immunefi?
Based on features, tags and platforms, the closest alternatives to Immunefi are Hats Finance, Sigma Prime, and Sherlock.
Are there open-source alternatives to Immunefi?
Yes: OpenZeppelin and Echidna.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative