3 Best Generative AI on Google Cloud Alternatives in 2026 (Open Source)
Generative AI on Google Cloud — Sample code and notebooks for Generative AI on Google Cloud, with Gemini on Vertex AI. Google's official sample repository for Generative AI on Google Cloud — the most comprehensive collection of Gemini, Imagen, and Vertex AI notebooks, unlike third-party tutorials it's maintained by Google and always reflects latest APIs
Short answer
- Closest match to Generative AI on Google Cloud: bRAG-langchain.
- Most actively developed: bRAG-langchain (1 commits in the last 90 days).
- Fastest growing: Gemini Fullstack LangGraph Quickstart (+48 GitHub stars in the last 30 days).
- No commit in 6+ months: LangChain and Gemini Fullstack LangGraph Quickstart.
These 3 open-source tools do the same job. They are ordered by how closely they match Generative AI on Google Cloud, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit |
|---|---|---|---|
| Generative AI on Google Cloud(original) | 17.8k | +205 | 2026-10-01 |
| bRAG-langchain | 4.2k | +16 | 2026-08-03 |
| LangChain | 1.6k | +2 | 2024-02-08 |
| Gemini Fullstack LangGraph Quickstart | 18.3k | +48 | 2025-06-18 |
1. bRAG-langchain
Everything you need to know to build your own RAG application
What sets it apart: Comprehensive hands-on RAG tutorial series covering basic to advanced techniques including multi-query, routing, re-ranking, and ColBERT integration
Best for: learning-rag-from-scratch; hands-on-advanced-rag-techniques; building-custom-rag-chatbots
2. LangChain
Reference implementations of several LangChain agents as Streamlit apps
What sets it apart: vs building from scratch: official LangChain reference implementations with Streamlit callbacks, memory management, and LangSmith observability — pre-built patterns for 5+ agent types (search, docs, SQL, dataframes)
Best for: Learning LangChain + Streamlit integration patterns; Building chatbots with web search, document Q&A, or database access; Rapid prototyping of conversational data analysis tools
3. Gemini Fullstack LangGraph Quickstart
Get started with building Fullstack Agents using Gemini 2.5 and LangGraph
Best for: Developers learning LangGraph-based agent architecture; Teams building research-augmented AI applications with source citations; Google Gemini ecosystem developers seeking fullstack reference implementation
FAQ
- What are the best alternatives to Generative AI on Google Cloud?
- The closest open-source alternatives to Generative AI on Google Cloud are bRAG-langchain, LangChain and Gemini Fullstack LangGraph Quickstart. They are ranked by how closely they match what Generative AI on Google Cloud does.
- Which Generative AI on Google Cloud alternative is the most popular?
- Gemini Fullstack LangGraph Quickstart has the most GitHub stars among Generative AI on Google Cloud alternatives, with 18,342 stars.
- Which Generative AI on Google Cloud alternative is the most actively maintained?
- By recent activity, bRAG-langchain (1 commits in the last 90 days) is the most actively developed alternative.