Foundry vs Tenderly
A detailed head-to-head comparison of Foundry and Tenderly — pricing, features, and which one wins for different use cases.
Foundry
Blazing-fast Rust-based Solidity testing framework with built-in fuzzing and invariant testing
Foundry is a Rust-based Ethereum development toolkit built by Paradigm that has become the preferred framework for security-conscious and performance-focused Solidity teams. Its defining advantage ove…
Full review →Tenderly
Smart contract observability platform for simulation, debugging, monitoring, and alerting in production
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 producti…
Full review →Feature Comparison
| Feature | Foundry | Tenderly |
|---|---|---|
| Local Node | ✓ | ✗ |
| Mainnet Forking | ✓ | — |
| Language | Solidity (tests) | — |
| Test Framework | forge-std | — |
| Plugin Ecosystem | Growing (smaller than Hardhat) | — |
| Debugging | ✓ | — |
| Deployment System | Forge scripts | — |
| Open Source | ✓ | ✗ |
| Fuzz Testing | ✓ | — |
| Invariant Testing | ✓ | — |
| Transaction Debugger | — | ✓ |
| Simulation Api | — | ✓ |
| Production Monitoring | — | ✓ |
| Alert System | — | ✓ |
| Virtual Testnets | — | ✓ |
| Rpc Provider | — | ✓ |
| Multi Chain | — | ✓ |
| Team Collaboration | — | ✓ |
Foundry Pricing
Foundry
Free (Open Source)
Free
- ✓forge, cast, anvil, chisel
- ✓Solidity tests
- ✓Built-in fuzzer
- ✓Invariant testing
- ✓Mainnet forking
- ✓Forge Standard Library
Tenderly Pricing
Tenderly
Developer
$39/mo
$390/yr billed annually
- ✓Unlimited simulations
- ✓Monitoring alerts
- ✓Virtual TestNets
- ✓Simulation API
Tenderly
Team
$99/mo
$990/yr billed annually
- ✓Team collaboration
- ✓Advanced monitoring
- ✓Custom alert conditions
- ✓Priority support
Tenderly
Enterprise
Custom
- ✓Dedicated infra
- ✓Custom SLA
- ✓Private networks
- ✓Compliance reporting
Verdict: Which Should You Choose?
Foundry is the better pick if you need 5–20x faster test execution than hardhat — critical for large suites and audit pipelines. Tenderly wins when visual transaction debugger is the most accessible evm debugging tool available. Both are production-ready — the right choice depends on your team's workflow and budget.