Hosted alternative to OpenZeppelin Monitor
OpenZeppelin Monitor is a free, open-source monitoring tool. You run it yourself: build it from Rust source or run it in Docker, describe networks, monitors and triggers in JSON files, and keep it up to date. It is OpenZeppelin's recommended path after Defender. If you have no one to run servers, SmartAlert is the hosted option for Ethereum, BNB Chain, Base and Arbitrum. Paste a contract address, and alerts arrive in Telegram, Slack, Discord or a webhook.
SmartAlert vs OpenZeppelin Monitor
| SmartAlertus | OpenZeppelin Monitor | |
|---|---|---|
| Hosting | Hosted (SaaS) | Self-hosted only (Rust binary or Docker) |
| Setup | Paste a contract address | JSON config files for networks, monitors and triggers |
| Upkeep | None on your side | Servers, RPC endpoints, updates, uptime |
| Networks | Ethereum, BNB Chain, Base, Arbitrum | EVM chains, Stellar, Solana |
| Limit per rule | Fixed threshold, or a baseline for every hour of the day | Fixed conditions (filters and scripts) |
| Check a rule on history before turning it on | Yes, over the last days of real data | — |
| Channels | Telegram, Slack, Discord, PagerDuty, email, webhook | Slack, Discord, Telegram, email, webhook, custom scripts |
| Price | Free; Pro $30/mo; Business $99/mo | Free (AGPL-3.0); you pay for servers and time |
- SmartAlertus
- Hosted (SaaS)
- OpenZeppelin Monitor
- Self-hosted only (Rust binary or Docker)
- SmartAlertus
- Paste a contract address
- OpenZeppelin Monitor
- JSON config files for networks, monitors and triggers
- SmartAlertus
- None on your side
- OpenZeppelin Monitor
- Servers, RPC endpoints, updates, uptime
- SmartAlertus
- Ethereum, BNB Chain, Base, Arbitrum
- OpenZeppelin Monitor
- EVM chains, Stellar, Solana
- SmartAlertus
- Fixed threshold, or a baseline for every hour of the day
- OpenZeppelin Monitor
- Fixed conditions (filters and scripts)
- SmartAlertus
- Yes, over the last days of real data
- OpenZeppelin Monitor
- —
- SmartAlertus
- Telegram, Slack, Discord, PagerDuty, email, webhook
- OpenZeppelin Monitor
- Slack, Discord, Telegram, email, webhook, custom scripts
- SmartAlertus
- Free; Pro $30/mo; Business $99/mo
- OpenZeppelin Monitor
- Free (AGPL-3.0); you pay for servers and time
“—” means the sources don’t say.
When to choose OpenZeppelin Monitor
You have DevOps
and want full control over infrastructure and data.
You need more chains
Stellar, Solana or EVM networks other than Ethereum, BNB Chain, Base and Arbitrum.
You need custom logic
in filter or notification scripts.
When SmartAlert fits
- No one on the team wants to run and watch a monitoring server.
- You want alerts working in minutes, not after a config and deploy cycle.
- Your contract's activity changes through the day. SmartAlert compares each hour with the same hour on previous days, so one rule works day and night.
- You want to see how often a rule would have fired before you turn it on.
FAQ
Is SmartAlert built on OpenZeppelin Monitor?
No. It is a separate hosted service.
Can I move my OpenZeppelin Monitor configs?
Not automatically. Recreate each monitor as a rule; the history chart shows where it would have fired.
Does SmartAlert hold keys or send transactions?
No. It reads public chain data and sends notifications.
Try it on your own contract
An address is enough. The first 14 days get Pro limits, and rules are checked on history before they go live.