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 alternatives
Other blockchain dev tools we track, ranked by the same independent score.
- InfuraWeb3 development platform providing blockchain APIs and infrastructure serviceslow · 26%
- QuickNodeManaged RPC infrastructure and developer tools for building on blockchain networkshigh · 76%
- Reown (WalletConnect)Developer platform for building decentralized applications with integrated authentication, payments, and user insightslow · 26%
- Foundrylow · 16%
- Hardhatlow · 17%
- Slitherlow · 24%
The Vioscale 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 |
|---|---|---|---|---|
| Price level | 100 | 0.05 | 5.2 | ✓ |
| Capabilities | 29 | 0.08 | 2.4 | ✓ |
| Pricing transparency | 25 | 0.08 | 2.1 | ✓ |
| Stars | 44 | 0.03 | 1.1 | ✓ |
| Reliability | 0 | 0.07 | 0.0 | - |
| Integrations | 0 | 0.09 | 0.0 | - |
| Dependent projects | 0 | 0.06 | 0.0 | - |
| Development activity | 0 | 0.09 | 0.0 | ✓ |
| Release cadence | 0 | 0.05 | 0.0 | - |
| Security posture | 0 | 0.07 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Security score | 0 | 0.04 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 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 · 2026-08-26 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 205 | highsource · 2026-08-26 · 90% |
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 · 2026-08-26 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-21 · 75% |