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OpenFang

Rust-based agent OS with built-in security, WASM sandboxing, and multi-agent runtime

OpenFang is an open-source agent operating system built in Rust that provides a secure multi-agent runtime with WASM sandboxing, auditability layers, and multi-channel communication. It goes beyond typical orchestration SDKs by treating agent security and operational isolation as first-class concerns, making it suitable for teams deploying agents in environments where trust boundaries and audit trails matter.

About OpenFang

OpenFang positions itself as an Agent Operating System rather than another orchestration framework, drawing a deliberate distinction between tools that help developers build agents and infrastructure that helps organizations run them safely. The platform is built in Rust for memory safety and performance, with WASM-based sandboxing that isolates agent execution environments from each other and from the host system. Each agent runs in its own sandbox with explicitly declared capabilities, preventing one compromised or misbehaving agent from affecting others.

The runtime provides multi-channel communication where agents can interact through HTTP, WebSocket, message queues, and custom protocols. An audit layer records every agent action, tool call, and inter-agent message with cryptographic integrity, creating tamper-evident logs suitable for compliance and forensic analysis. The permission model follows a capability-based security approach where agents must be granted specific permissions to access tools, data sources, or other agents.

OpenFang has accumulated over 16,000 GitHub stars and maintains active community channels on GitHub, Discord, and X. The Apache 2.0 license allows commercial use without restriction. The project targets organizations that need to move beyond prototype-stage agent deployments into production environments where security, observability, and operational control are non-negotiable requirements.

Pricing & Platform Specs

Pricing Summary

100% free and open source Agent Operating System written in Rust ($0 software cost). Self-hostable on any infrastructure with BYO API keys for model providers.

full pricing breakdown →

Supported Platforms

Linux, macOS, Docker (Rust-based runtime)

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Community experience

Sources & verification

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FAQ

What is OpenFang?

OpenFang is an open-source agent operating system built in Rust that provides a secure multi-agent runtime with WASM sandboxing, auditability layers, and multi-channel communication. It goes beyond typical orchestration SDKs by treating agent security and operational isolation as first-class concerns, making it suitable for teams deploying agents in environments where trust boundaries and audit trails matter.

Is OpenFang free?

Yes — OpenFang is open source and free to use. 100% free and open source Agent Operating System written in Rust ($0 software cost). Self-hostable on any infrastructure with BYO API keys for model providers.

Is OpenFang open source?

Yes — OpenFang is open source.

Is OpenFang still maintained?

Yes — OpenFang is active. Its listing was last verified on September 6, 2026.

What are the best OpenFang alternatives?

The first editor-selected OpenFang alternatives are VoltAgent, FastMCP, Cloudflare Agents, and more.