Side by side
Prusti vs Viper
Both stand on formal verification tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacWindows
Visit Prusti Paid ExtensionLinuxMac+2
Viper provides a focused, open-source environment for permission-based program verification with several language entry points. Its self-hosted model and Java-based IDE requirements are important setup considerations.
Visit ViperThe facts
| Prusti | Viper | |
|---|---|---|
| Free plan | Yes | Not published |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Windows | Extension, Linux, Mac, Web, Windows |
| Lowest paid plan | Not published | Not published |
| Plans published | None | None |
| Maker | Not published | Not published |
| Website | pm.inf.ethz.ch | pm.inf.ethz.ch |
| On formal verification tools | #30 of 34 | #34 of 34 |
Prusti: what it does well
Viper: what it does well
- Free and self-hosted
- Supports sequential and concurrent mutable-state programs
- Two Z3-based verification backends
- Front ends for Go, Python, and Rust
- Editable browser tutorial
What to know first
- Viper IDE requires 64-bit Java 11 or newer
- IDE downloads approximately 100 MB of dependencies
- Self-hosted deployment requires local setup