Echidna
Fuzzing tool for testing Ethereum smart contract security and behavior
- Vendor
- Trail of Bits
- Also known as
- echidna
Available worldwide
What is Echidna?
An Ethereum smart contract fuzzer using grammar-based fuzzing and symbolic execution to identify vulnerabilities and test contract behavior. Supports multiple testing modes including invariant testing, gas profiling, and integrates with major Ethereum development frameworks.
Echidna pricing
We don't have Echidna's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Echidna does
The capabilities that matter for smart contract tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Stack
- Solidity JS/TS
- Chain support
- EVM only
- Local testnet
- ✓
- Mainnet forking
- -
- Fuzz testing
- ✓
- Invariant testing
- ✓
- Static analysis
- ✓
- Symbolic execution
- ✓
- Formal verification
- ✓
- Gas profiling
- ✓
- Tx simulation debugging
- ✓
- Upgrade proxy tooling
- -
- Multisig transaction ops
- -
- Ide editor plugin
- -
- Deployment
- Local CLI
Platform & deployment
Independently observed- CLI
- macOS
- Linux
- On-premise
- Self-hosted
Integrations (15)
Independently observed- DappTools⇄•
- GitHub
- GitHub Actions
- Foundry
- Hardhat
- Brownie
- Etherscan
- Sourcify
- Slither
- hevm
- Z3
- Bitwuzla
- cvc5
- Alchemy
- Etheno
Echidna FAQ
Common questions about Echidna, answered from independent, dated evidence.
What is Echidna?
An open-source security tool that systematically tests Ethereum smart contracts by generating diverse inputs to uncover edge cases and potential bugs. It integrates into development workflows, provides code coverage analysis, and supports multiple contract frameworks and testing modes. It is indexed under Smart Contract Tools.
Source: https://github.com/pricing
Is Echidna free to use?
Echidna is open source, so it can be self-hosted and used at no licence cost. It is released under the CC-BY-SA-4.0 licence. Pricing changes often, so verify at source before relying on it.
Source: https://github.com/pricing
What platforms does Echidna support?
Echidna supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://github.com/pricing
Can Echidna be self-hosted?
Yes. Echidna can be deployed on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://github.com/pricing
What does Echidna integrate with?
We have confirmed 11 integrations for Echidna, including GitHub, Foundry, Hardhat, Brownie, Etherscan, Sourcify, Slither and hevm, plus 3 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://github.com/pricing
Is Echidna open source?
Yes. Echidna is published under the CC-BY-SA-4.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Echidna alternatives
Other smart contract tools we track, ranked by the same independent score.
- AnchorFramework and toolkit for building applications on the Solana blockchainlow · 25%
- thirdwebPlatform infrastructure for building blockchain and AI agent applicationslow · 22%
- Certora ProverFormal verification tools for smart contracts with mathematical certaintylow · 14%
- MythrilSecurity vulnerability detector for Ethereum smart contracts using symbolic executionlow · 34%
Compare Echidna
Side by side against other smart contract tools, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Echidna, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 92 | 0.10 | 9.1 | ✓ |
| Pricing transparency | 80 | 0.05 | 4.2 | ✓ |
| Price level | 100 | 0.04 | 4.0 | ✓ |
| Security score | 76 | 0.05 | 4.0 | ✓ |
| Development activity | 33 | 0.12 | 3.9 | ✓ |
| Stars | 62 | 0.03 | 2.0 | ✓ |
| Integrations | 27 | 0.05 | 1.5 | ✓ |
| Reliability | 0 | 0.05 | 0.0 | - |
| Dependent projects | 0 | 0.08 | 0.0 | - |
| Release cadence | 0 | 0.07 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 10 | mediumsource · 2026-10-15 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 1,911 | highsource · 2026-10-15 · 90% |
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 6 items | mediumsource · 2026-09-10 · 66% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Stack: Solidity-JS/TS · Deployment: local-cli · Fuzz testing: Yes · Chain support: EVM-only · Gas profiling: Yes · Local testnet: Yes | mediumsource · 2026-10-15 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 8 | mediumsource · 2026-10-15 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Python | highsource · 2026-10-15 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | CC-BY-SA-4.0 | highsource · 2026-10-15 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-19 · 75% |
Pricing
Security
Is Echidna the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Echidna against the rest of the smart contract tools we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
Is this your product?
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