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Circom

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circom

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📝 Description

Circom is a specialized compiler and circuit description language for building zero-knowledge proof applications. Written in Rust, it enables developers to design arithmetic circuits that are compiled to R1CS (Rank-1 Constraint System) format, allowing them to create, test, and generate zero-knowledge proofs. The ecosystem includes the circom compiler, supporting libraries like circomlib (containing hundreds of circuit templates for comparators, hash functions, digital signatures, and converters), circomlibjs, and snarkjs to facilitate the entire zero-knowledge proof development process. Circom enables the creation of large circuits by combining smaller generic circuits called templates, opening up possibilities for privacy-preserving applications in digital identities, voting systems, and financial transactions where proving statement validity without revealing underlying data is critical.

🔗 Links

  • Website: https://circom.io

🏷️ Category

Privacy Technology

📊 Project Status

GitHub Statistics

👥 Team

See Team Research for detailed team information.

🛠️ Technical Details

See TECHNICAL (see below) for technical documentation.

🔒 Security

See Security Analysis for security analysis.

Research completed with Constitutional Research v2.0.0 Last updated: 2025-10-10

Repository Analysis▼
⚙Analysis performed using cargo audit, semgrep, and direct code inspection on cloned repositories.→ methodology

Code Review & Repository Analysis

Last Updated: 2025-10-24

Repository Overview

Repository: iden3/circom

Description: zkSnark circuit compiler

Repository Metrics

Community Engagement

  • Stars: 1522
  • Forks: 336
  • Watchers: 1522
  • Open Issues: 109

Development Activity

  • Status: Very Active
  • Created: 2021-10-11
  • Last Commit: 2025-10-02
  • Repository Size: ~5107 KB

Repository Health

  • License: GNU General Public License v3.0
  • Default Branch: master
  • Archived: No
  • Issues Enabled: Yes
  • Discussions: Not enabled

Code Composition

Primary Language: WebAssembly

| Language | Status | |----------|--------| | WebAssembly | Included | | Rust | Included | | Assembly | Included | | C++ | Included | | JavaScript | Included | | Makefile | Included |

Contributor Activity

Total Contributors

67 contributors

Development Pattern

The repository shows active development with multiple contributors working across features and fixes.

Recent Development

Recent Commits (Last 5)

| Date | Commit | Author | Message | |------|--------|--------|---------| | 2025-10-02 | 0ecb2c7 | Miguel Isabel | Allow anonymous components in inline arrays | | 2025-10-02 | c77bc3b | Miguel Isabel | Update RELEASES.md | | 2025-08-07 | 6f782d7 | Albert Rubio | Some typos fixed in the extern_c documentation | | 2025-08-07 | 6ef63ed | Albert Rubio | Adding link to the Costa group git | | 2025-08-07 | 0abed97 | alrubio | documentation for the extern_c feature is added |

Development Cadence: Active development with regular commits.

Development Observations

Code Quality Indicators

Positive Signals:

  • ✅ Active development with regular commits
  • ✅ Multiple contributors
  • ✅ Bug fixes and feature development ongoing
  • ✅ Open issues tracked
  • ✅ Public repository (code auditable)
  • ✅ Open source license (GNU General Public License v3.0)

Activity Status

  • Level: Very Active
  • Recent Activity: Very recent
  • Issue Tracking: Enabled

What This Repository Does

The repository contains code and development for this project. The presence of:

  • 67 contributors indicates team size and collaboration
  • Regular commits indicate active maintenance
  • 109 open issues indicate engagement with user feedback
  • Public repository indicates commitment to transparency

Code Review Accessibility

For Security Researchers:

  • Full source code available on GitHub
  • GNU General Public License v3.0 license
  • 67 contributors indicate multiple code reviews have occurred
  • Commit history available for all changes
  • Issues/discussions show community security awareness

How to Review:

  1. Clone: git clone https://github.com/iden3/circom.git
  2. Browse: https://github.com/iden3/circom
  3. License: GNU General Public License v3.0

Sources

| Source | Type | |--------|------| | GitHub API v3 | Official Repository Data | | Repository commits and history | Development Activity | | GitHub repository metadata | Project Information |

Data Notes

  • Repository metrics as of 2025-10-02
  • Contributor list includes all authors with commits
  • Recent commits shown are most recent as of last push
Team Research▼

Team & Leadership

Research Date: 2025-10-05

Core Team

🔍 Team information not publicly available

Checked sources:

  • Official website team page
  • LinkedIn profiles
  • GitHub contributors
  • Conference speaker bios
  • Press releases

📧 Know the team? Submit data via Pull Request

Security Analysis▼

Security & Audits

Research Date: 2025-10-05

Security Audits

🔍 No public security audit reports found

Checked sources:

  • Project website/docs
  • Audit firms (Certik, Trail of Bits, ConsenSys Diligence, etc.)
  • GitHub security advisories
  • Blog announcements

📧 Have audit reports? Submit via Pull Request

Bug Bounty Program

🔍 No public bug bounty program found

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