FirmOS vs Google Agent Development Kit (ADK)

A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.

	FirmOS Agents	Google Agent Development Kit (ADK) Agents
Tagline	Done-for-you AI automation platform purpose-built to scale accounting firms.	Google's open-source framework for building, evaluating, and deploying production AI agents
Category	Agents	Agents
Pricing	Paid· Basic: $10 · Pro: $25 · Enterprise: Contact sales	Free· Framework itself is free and open-source (Apache 2.0). Costs come from the underlying model provider (e.g. Gemini API / Vertex AI usage) and any hosting infrastructure (Cloud Run, GKE, Agent Engine).
Model	Claude, ChatGPT, Gemini	Gemini (default) plus Claude, GPT-4/5, Llama, and other providers via LiteLLM
Editorial score	6.9 / 10	—
Use cases	accounting-firm-automationlead-generationai-recruitingsop-generationkpi-dashboards	Multi-agent research assistantCustomer support triage agentRAG chatbot backed by Vertex AI SearchCode review and refactoring agentBigQuery natural-language analytics agentDocument processing pipelineVoice/streaming conversational agentInternal tool-use agent orchestrating APIsEvaluation and regression testing of LLM workflowsEnterprise workflow automation on Agent Engine
Pros	Vertical focus on accounting firms means workflows match how CPAs actually operate Done-for-you implementation removes the configuration burden from firm owners Bundles BD, hiring, and ops automation that would otherwise need 3+ tools KPI dashboard tracks 70+ firm-specific metrics out of the box	Genuinely open-source (Apache 2.0) with active Google engineering behind it, not a hosted-only product Multi-language: first-class Python, Java, and Go SDKs — rare among agent frameworks that are usually Python-only Built-in dev UI (`adk web`) with trace inspection, event stream, and session replay speeds up debugging enormously Model-agnostic via LiteLLM — Gemini is default but Claude, GPT, and local models plug in cleanly Rich multi-agent primitives out of the box: SequentialAgent, ParallelAgent, LoopAgent, and hierarchical sub-agents Tight Google Cloud integration for deployment (Cloud Run, GKE, Agent Engine) plus native BigQuery/Vertex Search tools Evaluation harness with trajectory-level scoring is included, not a separate paid add-on First-class MCP (Model Context Protocol) client and server support
Cons	Opaque pricing with a high floor â€” not viable for solo practitioners or trial users No public API or self-serve sign-up; onboarding requires sales calls Underlying AI models and data handling are not disclosed publicly	Documentation and examples lean heavily on Gemini + Google Cloud; non-Google paths work but feel like second-class citizens API surface is still evolving — breaking changes between minor versions have been common through 2025-2026 Multi-agent orchestration primitives are powerful but the graph/callback model has a real learning curve compared to a plain prompt loop Agent Engine deployment is convenient but locks you into GCP billing and quotas TypeScript/Kotlin support lags the Python SDK in features and community examples
Website	firmos.ai	google.github.io

Pick FirmOS if

✅ Vertical focus on accounting firms means workflows match how CPAs actually operate
✅ Done-for-you implementation removes the configuration burden from firm owners
✅ Bundles BD, hiring, and ops automation that would otherwise need 3+ tools
✅ KPI dashboard tracks 70+ firm-specific metrics out of the box

Pick Google Agent Development Kit (ADK) if

✅ Genuinely open-source (Apache 2.0) with active Google engineering behind it, not a hosted-only product
✅ Multi-language: first-class Python, Java, and Go SDKs — rare among agent frameworks that are usually Python-only
✅ Built-in dev UI (`adk web`) with trace inspection, event stream, and session replay speeds up debugging enormously
✅ Model-agnostic via LiteLLM — Gemini is default but Claude, GPT, and local models plug in cleanly

Compare a different pair →