Agent Development Kit (ADK) vs OpenFang

Agent Development Kit (ADK) and OpenFang 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.

Agent Development Kit (ADK)

ADK is the open-source agent development framework that lets you build, debug, and deploy reliable AI agents at enterprise scale.

OpenFang

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

Attribute	Agent Development Kit (ADK)	OpenFang
Pricing	Free	Free
Free trial	No	No
Open source	No	No
Has API	Yes	Yes
Self-hosted option	Yes	Yes
Platforms	Python, TypeScript, Go, and Java	macOS, Linux, and Windows
Languages	Python, TypeScript, Go, and Java	Built with Rust
Released	2025-04	2026-02
Pros	Context is treated like source code with structured assembly of sessions, memory, tool outputs, and artifacts, automatic filtering of irrelevant events, summarization of older turns, lazy-loading of artifacts, and token usage tracking to keep agents fast, efficient, and reliable by default Multi-language support with Python, TypeScript, Go, and Java implementations Model-agnostic and compatible with other frameworks while optimized for Gemini Built-in development UI for testing, evaluating, debugging, and showcasing agents When deploying to Google Cloud, agents inherit managed infrastructure, built-in authentication, Cloud Trace observability, and enterprise-grade security without code changes	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
Cons	Optimized primarily for Google Cloud deployment and Gemini models, though model-agnostic capabilities exist Development version builds directly from latest code commits may contain experimental changes or bugs not present in stable release	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

Bottom line

Agent Development Kit (ADK) and OpenFang are closely matched on pricing model, openness, and API availability — pick by feature set and platform support in the table above.

Comparison data is sourced and verified by the AIDiveForge data pipeline. AIDiveForge is editorially independent.