A head-to-head comparison of OpenZeppelin and Consensys Diligence — pricing, the features that actually differ, and which one fits which use case.
The most trusted smart contract security firm and audit partner
Ethereum-native audit team from the company behind MetaMask and Infura
These are the 6 capabilities where the two tools genuinely diverge — the rest of their feature sets overlap.
| Capability | OpenZeppelin | Consensys Diligence |
|---|---|---|
| Automated Scanning | No | Yes |
| Continuous Monitoring | Yes | No |
| Upgrade Management | Yes | No |
| Multi Sig Governance | Yes | No |
| Contract Library | Yes | No |
| Formal Verification | No | Yes |
| Feature | OpenZeppelin | Consensys Diligence |
|---|---|---|
| Manual Audit | ✓ | ✓ |
| Automated Scanning | ✗ | ✓ |
| Continuous Monitoring | ✓ | ✗ |
| Upgrade Management | ✓ | ✗ |
| Multi Sig Governance | ✓ | ✗ |
| Public Reports | ✓ | ✓ |
| Emergency Response | ✓ | ✓ |
| Contract Library | ✓ | ✗ |
| Formal Verification | ✗ | ✓ |
| Bug Bounty Management | ✗ | ✗ |
Pricing models differ substantially between these two.
OpenZeppelin
Free
OpenZeppelin
Free
OpenZeppelin
$799/mo
OpenZeppelin
Custom
Consensys Diligence
Custom
Watch out: Audit waitlists of 3–6 months are common — not suitable for fast-moving launches.
Watch out: Ethereum/EVM-focused, not multi-ecosystem.
OpenZeppelin edges ahead on our editorial score (4.8/5), but these tools aren’t straight substitutes. Pick OpenZeppelin when most recognized audit credential in crypto — signals highest institutional trust matters most to your workflow; pick Consensys Diligence when first-party ethereum pedigree via consensys is the priority. The deciding factor is usually the trade-off you can least afford — OpenZeppelin means accepting that audit waitlists of 3–6 months are common — not suitable for fast-moving launches, while Consensys Diligence means ethereum/evm-focused, not multi-ecosystem.
OpenZeppelin carries the higher editorial rating (4.8/5 vs 4.7/5), but they solve different problems. OpenZeppelin is the stronger pick when you need most recognized audit credential in crypto — signals highest institutional trust. Consensys Diligence wins when first-party ethereum pedigree via consensys.
OpenZeppelin is free to use, while Consensys Diligence is priced on request.
OpenZeppelin's main limitation is that audit waitlists of 3–6 months are common — not suitable for fast-moving launches. For Consensys Diligence, ethereum/evm-focused, not multi-ecosystem. Weigh these against how you actually plan to use the tool.
In most cases yes — many teams run both, using each where it's strongest. Since OpenZeppelin leads on most recognized audit credential in crypto — signals highest institutional trust and Consensys Diligence on first-party ethereum pedigree via consensys, the two are often complementary rather than mutually exclusive.