Plans
OpenZeppelin Defender offered three subscription tiers for its hosted security platform. New sign-ups were disabled on June 30, 2025, and Defender will shut down on July 1, 2026. Users are migrating to the open-source OpenZeppelin Relayer and OpenZeppelin Monitor projects, which are self-hosted and free to use. The open-source projects have no subscription tiers — operators self-host and bear their own infrastructure costs.
Plans is the machine-readable pricing-plan profile for OpenZeppelin on the APIs.io network, conforming to the API Commons Plans specification.
It defines 4 plans, with named plans including Builder, Professional, Enterprise, Open Source (Self-Hosted).
Tagged areas include Web3, Smart Contracts, Blockchain, Security, and Ethereum.
Plans
Free tier for individuals and small projects developing on testnets. Provides access to core Defender features with limited quotas on relayers, monitors, actions, and proposals. Suitable for prototyping and learning.
Paid tier for mature mainnet projects requiring higher quotas, premium features, SLA-backed support from OpenZeppelin, and metered billing for usage above plan thresholds. Includes access to all Defender modules with production-grade quotas.
Custom tier for large-scale projects requiring higher transaction volumes, custom quotas, dedicated support, premium security features, and negotiated SLAs. Includes access to advanced features and the ability to request elevated rate limits beyond the standard thresholds.
The open-source OpenZeppelin Relayer and OpenZeppelin Monitor projects are freely available under open-source licenses. Users self-host the services on their own infrastructure and are responsible for operational costs. Default rate limits are configurable by the operator.