Available worldwide
What is OpenZeppelin Contracts?
Provides battle-tested smart contract code implementing ERC standards and security best practices for blockchain development, supporting Solidity, Cairo, Stellar, Sui, and other platforms.
OpenZeppelin Contracts pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
Free and open source
Open Source
FreeFree access to OpenZeppelin Contracts library
What OpenZeppelin Contracts does
The capabilities that matter for blockchain dev tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Tooling type
- Contract library
- Evm compatible only
- ✗
- Local dev network
- -
- Native fuzzing invariant testing
- -
- Mainnet forking
- -
- Contract verification integration
- -
- Trace debugger
- -
- Gas profiling
- -
- Archive node access
- -
- Graphql indexing
- -
- Static analysis security tool
- -
- Open source
- ✓
- Maintenance status
- Active
Platform & deployment
Independently observed- CLI
- Web
- Self-hosted
OpenZeppelin Contracts FAQ
Common questions about OpenZeppelin Contracts, answered from independent, dated evidence.
What is OpenZeppelin Contracts?
Provides battle-tested smart contract code implementing ERC standards and security best practices for blockchain development, supporting Solidity, Cairo, Stellar, Sui, and other platforms. It is indexed under Blockchain Dev Tools.
Is OpenZeppelin Contracts free to use?
OpenZeppelin Contracts is open source, so it can be self-hosted and used at no licence cost. It is released under the AGPL-3.0 licence. Pricing changes often, so verify at source before relying on it.
What platforms does OpenZeppelin Contracts support?
OpenZeppelin Contracts supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Can OpenZeppelin Contracts be self-hosted?
Yes. OpenZeppelin Contracts can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Is OpenZeppelin Contracts open source?
Yes. OpenZeppelin Contracts is published under the AGPL-3.0 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.
OpenZeppelin Contracts alternatives
Other blockchain dev tools we track, ranked by the same independent score.
- QuickNodeBlockchain infrastructure platform supporting 75+ chains with RPC, real-time event streaming, and data indexingmedium · 73%
- HardhatA professional-grade toolkit for building, testing, and deploying Ethereum smart contractsmedium · 59%
- FoundryA rapid Ethereum smart contract development toolkithigh · 75%
- AlchemyLow-cost blockchain infrastructure for web3 developershigh · 76%
- InfuraInfrastructure APIs for Ethereum and IPFS blockchains and distributed storage networkslow · 48%
- BlockscoutA multichain blockchain explorer for searching and analyzing transaction data across EVM and non-EVM networksmedium · 65%
Compare OpenZeppelin Contracts
Side by side against other blockchain dev 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 OpenZeppelin Contracts, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 29 | 0.08 | 2.4 | ✓ |
| Stars | 44 | 0.03 | 1.5 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Dependent projects | 0 | 0.08 | 0.0 | - |
| Development activity | 0 | 0.12 | 0.0 | ✓ |
| Release cadence | 0 | 0.07 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Security score | 0 | 0.05 | 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 | 0 | mediumsource · 2026-10-05 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 214 | highsource · 2026-10-05 · 90% |
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 67% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Open source: Yes · Tooling type: contract-library · Maintenance status: active · Evm compatible only: No | mediumsource · 2026-08-21 · 60% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | AGPL-3.0 | highsource · 2026-10-05 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-21 · 75% |
Pricing
Is OpenZeppelin Contracts the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank OpenZeppelin Contracts against the rest of the blockchain dev 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?
This profile was built from public sources without asking you. You can take the badge below and use it anywhere, and you can claim the profile to correct anything we got wrong. Both are free, and neither moves OpenZeppelin Contracts up or down: nobody can buy rank here, including you.
Take the badge
Live, always current, and free to use on your own site. It shows OpenZeppelin Contracts's independent score and links back to this profile.
<a href="https://www.vioscale.ai/software/openzeppelin-contracts" target="_blank" rel="noopener">
<img src="https://www.vioscale.ai/badge/software/openzeppelin-contracts.svg" alt="OpenZeppelin Contracts, verified on vioscaleAI" width="330" height="76" loading="lazy" />
</a>Markdown, for a README →
[](https://www.vioscale.ai/software/openzeppelin-contracts)Claim the profile
Verify you control the domain, then point us at the pages that state the facts about OpenZeppelin Contracts and add your own description and media. Free, and it does not change the score.
- Correct anything wrong, with evidence
- Point our crawler at the pages that matter
- Write your own description and add media
Not the owner? How vendor profiles work