Google Agent Development Kit (ADK) vs OpenAI Agents SDK
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Google Agent Development Kit (ADK) if you want open-source framework for building and orchestrating multi-agent systems (Supervised agent, free); choose OpenAI Agents SDK if you want lightweight open-source framework for building multi-agent workflows (Supervised agent, free).
| Google Agent Development Kit (ADK) | OpenAI Agents SDK | |
|---|---|---|
| What it is | Open-source framework for building and orchestrating multi-agent systems | Lightweight open-source framework for building multi-agent workflows |
| Type | framework | framework |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | free · Free (open source; pay model + cloud usage) | free · Free (open source; pay underlying model usage) |
| Best for | developers, enterprise | developers |
| Deployment | self-hosted, api | self-hosted, api |
| Modalities | text, code, api | text, code, voice, api |
| Models | gemini, model-agnostic | model-agnostic, gpt |
| Protocols | a2a, mcp, function-calling, rest-api | mcp, function-calling, rest-api |
| Integrations | Vertex AI, Cloud Run, Gemini, LiteLLM, MCP servers | OpenAI API, MCP servers, Python, JavaScript/TypeScript |
| Capabilities | 3 documented | 4 documented |
Google Agent Development Kit (ADK)
- +Backed by Google with first-class deployment to Vertex AI and Cloud Run
- +Built around the open A2A protocol for cross-framework agent interoperability
- +Model-agnostic via LiteLLM despite Gemini-first defaults
- -A framework, not a product: you build, host, and secure agents yourself
- -Strongest when paired with Google Cloud, which can imply lock-in
OpenAI Agents SDK
- +Minimal, low-abstraction framework that is quick to learn
- +Built-in handoffs, guardrails, sessions, and tracing
- +Provider-agnostic (100+ LLMs) with Python and JS/TS (and voice) SDKs
- -A framework, not a product: you build, host, and secure the agent yourself
- -Autonomy and safety depend entirely on how the developer configures it
Which should you choose?
Google Agent Development Kit (ADK) is open-source framework for building and orchestrating multi-agent systems, best for developers, enterprise. OpenAI Agents SDK is lightweight open-source framework for building multi-agent workflows, best for developers. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced Google Agent Development Kit (ADK) and OpenAI Agents SDK profiles. Open either profile to review its evidence and last-reviewed date.