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Tech riderRev. 2 Oct 2026

Z3

Ch 037.4of 33 Formal Verification Tools
  1. 1Runs onAndroid, API, Linux, Mac, self-hosted, Web, Windows
  2. 2CostsFree plan
  3. 3Supported formalismstheorem-proving
  4. 4CounterexamplesYes
  5. 5Proof artifactsYes
  6. 6Input languagesSMT-LIB2, C, C++, .NET, Java, Python, Rust, OCaml, Julia, JavaScript, TypeScript, Smalltalk, Go
  7. 7Deploymentself-hosted
7 lines stated Written from the maker's own pages: github.com
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The Z3 homepage

Overview

Z3 is ranked #3 of 33 in formal verification tools on Specifiction. It runs on Android, API, Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

Z3 plans and pricing

All plans
Z3 (MIT licensed) Free MIT-licensed downloads and source code github.com · 2 Oct 2026

Compared on formal verification tools

Free plan
Yesgithub.com
Supported formalisms
theorem-provinggithub.com
Counterexamples
Yesgithub.com
Proof artifacts
Yesgithub.com
Input languages
SMT-LIB2, C, C++, .NET, Java, Python, Rust, OCaml, Julia, JavaScript, TypeScript, Smalltalk, Gogithub.com
Deployment
self-hostedgithub.com

Facts

Purpose
Z3 is a theorem prover and satisfiability modulo theories (SMT) solver.github.com · 2 Oct 2026
SMT-LIB
Z3 supports the SMTLIB format.github.com · 2 Oct 2026
Applications
Z3 is used in software verification and analysis applications.microsoft.com · 2 Oct 2026
Input
SMTLIB2 is Z3’s default input format.github.com · 2 Oct 2026
Build systems
Z3 can be built using CMake, vcpkg, or Bazel.github.com · 2 Oct 2026
Language interfaces
The repository documents bindings or APIs for C, C++, .NET, Java, Go, OCaml, Python, Julia, and JavaScript/TypeScript.github.com · 2 Oct 2026
Browser use
The project wiki links to a page for trying Z3 in a browser.github.com · 2 Oct 2026
Platforms
The project wiki lists Windows, OSX, Linux (Ubuntu and Debian), and FreeBSD as supported platforms.github.com · 2 Oct 2026
Downloads
The repository links to pre-built binaries for stable and nightly releases.github.com · 2 Oct 2026
License
The repository states that Z3 is licensed under the MIT license.github.com · 2 Oct 2026
Security
The README says MSVC builds enable Control Flow Guard and Address Space Layout Randomization by default.github.com · 2 Oct 2026
Dependencies
Python is required to build Z3, and additional toolchains are needed to build Java, .NET, OCaml, and Julia APIs.github.com · 2 Oct 2026
Support
The project wiki says to contact the creator of an external binding package for support issues.github.com · 2 Oct 2026

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Where it ranks on Specifiction

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Sources