---
title: "Google ADK vs LlamaIndex: Which is Better in 2026? | App Stack Builder"
description: "Google ADK vs LlamaIndex compared for 2026 — pricing, free tiers, features, pros & cons. See which agent framework tool is the better fit for your startup."
source: https://appstackbuilder.com/compare/google-adk-vs-llamaindex
retrieved: 2026-09-12
---

Agent Framework

# Google ADK vs LlamaIndex: Which is Better in 2026?

Choosing between [Google ADK](https://appstackbuilder.com/tools/google-adk) and [LlamaIndex](https://appstackbuilder.com/tools/llamaindex)? Both are popular agent framework tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

Quick verdict

Both Google ADK and LlamaIndex are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

## Google ADK vs LlamaIndex — Side by Side

|                | Google ADK                | LlamaIndex                |
| -------------- | ------------------------- | ------------------------- |
| Category       | Agent Framework           | Agent Framework           |
| Pricing        | Free                      | Free                      |
| Starting price | Free tier available       | Free tier available       |
| Free tier      | ✓                         | ✓                         |
| Rating         | 4.4                       | 4.5                       |
| Best for       | Agent Framework — ai, llm | Agent Framework — ai, llm |

## Pros & Cons

![Google ADK](https://www.google.com/s2/favicons?domain=google.github.io&sz=128)

[Google ADK](https://appstackbuilder.com/tools/google-adk)

* ✓Deep GCP / Vertex AI integration
* ✓Strong multi-agent support
* ✓Model-agnostic via LiteLLM
* ✓Backed by Google
* ✗Best value tied to Google Cloud
* ✗Younger ecosystem than LangChain

![LlamaIndex](https://www.google.com/s2/favicons?domain=llamaindex.ai&sz=128)

[LlamaIndex](https://appstackbuilder.com/tools/llamaindex)

* ✓Excellent RAG tooling
* ✓Strong document parsing (LlamaParse)
* ✓Open-source
* ✓Many data connectors
* ✗Overlaps with LangChain (choose one)
* ✗Cloud features usage-priced

## Key Features Compared

### Google ADK

* ✓Multi-agent orchestration
* ✓Gemini-optimized, model-agnostic (LiteLLM)
* ✓Built-in evaluation
* ✓Tooling & code execution
* ✓Python & Java

### LlamaIndex

* ✓Free open-source framework
* ✓Best-in-class RAG primitives
* ✓Data connectors & query engines
* ✓Python & TypeScript

### Choose Google ADK if…

* ✓You want a free tier to validate before paying.
* ✓Deep GCP / Vertex AI integration
* ✓Strong multi-agent support
* ✓Model-agnostic via LiteLLM
[Google ADK review & pricing ](https://appstackbuilder.com/tools/google-adk)

### Choose LlamaIndex if…

* ✓You want a free tier to validate before paying.
* ✓Excellent RAG tooling
* ✓Strong document parsing (LlamaParse)
* ✓Open-source
[LlamaIndex review & pricing ](https://appstackbuilder.com/tools/llamaindex)

## Frequently Asked Questions

Is Google ADK better than LlamaIndex?⌄

Both Google ADK and LlamaIndex are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

What is the difference between Google ADK and LlamaIndex?⌄

Google ADK — Google's open-source Agent Development Kit — multi-agent systems optimized for Gemini and Vertex AI, model-agnostic via LiteLLM. LlamaIndex — Open-source data framework for RAG and agents — connect LLMs to your data, with LlamaCloud for managed pipelines. Both are agent framework tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

Google ADK vs LlamaIndex: which is cheaper?⌄

Google ADK pricing: Free. LlamaIndex pricing: Free. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, Google ADK or LlamaIndex?⌄

In our catalog, Google ADK rates 4.4 out of 5 and LlamaIndex rates 4.5 out of 5, so LlamaIndex has a slight edge on reviews.

See more options in our guide to the [best agent framework tools for startups](https://appstackbuilder.com/categories/agent-framework).

## Still not sure which to pick?

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