Smart contract observability platform for simulation, debugging, monitoring, and alerting in production
Last updated: July 2026
Tenderly is the observability and developer tooling platform for smart contracts, used by teams at Uniswap, Aave, Compound, Synthetix, and 3,000+ other projects for debugging, simulation, and production monitoring. The transaction debugger is Tenderly's flagship feature: any transaction on any supported network — including failed transactions — can be replayed step-by-step in a visual UI that shows the EVM stack, storage changes, emitted events, and token balance deltas at each call frame. This visual replay is significantly more accessible than Hardhat's stack trace output for debugging complex multi-contract interactions. The Simulation API lets you predict what a transaction will do before submitting it — used by wallets to show users expected token changes before they sign, and by protocols to test proposed parameter changes against real mainnet state. Virtual TestNets create shareable, collaborative environments based on any chain's mainnet state — useful for multi-team integration testing. Tenderly's production monitoring watches your contracts 24/7 and fires webhooks when specific events, function calls, or anomalous transaction patterns occur. The Web3 Gateway provides RPC with simulation and debugging built in. For teams that have shipped to mainnet and need production observability tools, Tenderly is the standard platform.
Tenderly offers a free plan. Paid plans start at $39/month.
Tenderly
$39/mo
$390/yr billed annually
Tenderly
$99/mo
$990/yr billed annually
Tenderly
Custom
| Feature | Tenderly |
|---|---|
| Local Node | ✗ |
| Transaction Debugger | ✓ |
| Simulation Api | ✓ |
| Production Monitoring | ✓ |
| Alert System | ✓ |
| Virtual Testnets | ✓ |
| Rpc Provider | ✓ |
| Open Source | ✗ |
| Multi Chain | ✓ |
| Team Collaboration | ✓ |
Yes, Tenderly has a free plan. Paid plans start from $39/month.
Tenderly is used for smart contract observability platform for simulation, debugging, monitoring, and alerting in production. It's primarily used by Web3 teams in the Web3 Developer Tools category.
See our full alternatives comparison at web3tools.directory/alternatives/tenderly.
Tenderly has a rating of 4.6/5 based on 1840 reviews. Key strength: Visual transaction debugger is the most accessible EVM debugging tool available. Main limitation: Free tier limits simulations to 5/month — quickly exhausted in active development.
Get started for free — no credit card required.