OpenFang vs Patina

OpenFang and Patina are both agent frameworks tracked by AIDiveForge. Below is a side-by-side comparison of pricing, capabilities, platforms, and ownership — sourced from each tool's live website and verified before publishing.

OpenFang

An open-source Agent Operating System built from scratch in Rust, designed to run autonomous agents on schedules.

Patina

Orbit wraps each agent task in a bounded loop: the agent works, validation runs (tests, lint, type checks), and the task only closes when the checks pass. Every loop leaves structured JSON artifacts — what the agent returned, how it scored against a rubric, and a human-readable recommendation to accept, retry, or stop. This makes agent runs auditable after the fact, not just observable in the moment. The ceiling appears when your project needs multi-agent coordination or a hosted execution layer — Orbit is deliberately narrow, self-hosted only, and ships no managed runtime.

Attribute	OpenFang	Patina
Pricing	Free	Free
Free trial	No	No
Open source	No	Yes
Has API	Yes	No
Self-hosted option	Yes	Yes
Platforms	macOS, Linux, and Windows	Python (via pip install), local execution, CLI
Languages	Built with Rust	—
Released	2026-02	—
Pros	Compiles to a single ~32MB binary with no external dependencies Seven autonomous Hands and 16 security layers included 40 messaging channel adapters provide the broadest platform coverage 15-crate modular Rust workspace enables extensibility and maintenance Comprehensive security including WASM dual-metered sandbox, Ed25519 signing, Merkle audit trail, and taint tracking	Validation gates block task closure until tests, lint, and type checks pass, so agents cannot self-report success on work that would fail your CI pipeline. Four structured artifacts per run (agent output, rubric evaluation, review recommendation, and progress log), which means audit trails exist by default instead of requiring you to reconstruct what happened from logs. Dependency-ordered backlog selection keeps each loop focused on one task at a time, so agents do not skip prerequisites or work on tasks whose dependencies are not yet verified. Agent-neutral adapter contract lets you swap Claude, Codex, Cursor, or any JSON-speaking CLI behind the same harness, so you compare agents on identical tasks with structured artifacts instead of anecdotes. MIT licensed and fully self-hosted, so teams with on-premise requirements or external platform restrictions can run the full harness without a managed dependency.
Cons	Feature complete but pre-1.0 status means rough edges and breaking changes between minor versions Not all Hands are equally mature; Browser and Researcher are most battle-tested Target for rock-solid v1.0 is mid-2026, indicating ongoing volatility expected	Orbit handles one task per loop; there is no mechanism for running agents in parallel or coordinating handoffs between agents. Teams whose workflows require concurrent agent execution build a separate scheduling layer on top — at which point they are maintaining two systems. The harness ships no hosted runtime, no API, and no managed execution environment. Teams that want cloud-hosted agent scheduling or need to trigger runs from external CI systems without standing up their own infrastructure will move to a platform that provides those primitives. The adapter and demo ecosystem is early-stage and contribution-dependent. Teams integrating a coding agent that lacks an existing adapter write and maintain the adapter themselves, which adds setup cost before the first validated loop runs.

Bottom line

Patina is open source; only OpenFang exposes a public API. Choose based on which difference matters most for your workflow.

Frequently asked questions

What is the difference between OpenFang and Patina?

OpenFang is Free, while Patina is Free and open source. Compare pricing, free trial, API, platforms, and pros/cons in the table above on AIDiveForge.

Is OpenFang better than Patina?

It depends on your workflow. Use the side-by-side attributes (pricing, open source, API, self-hosted, platforms) to decide. AIDiveForge does not rank a universal winner — we publish verified facts so you can choose.