Free stacks
6 projects you can build entirely on free tiers: one offer per role, swappable, limits side by side.
| Use case | Roles | Default picks |
|---|---|---|
| RAG app Answer questions over your own documents: an LLM, embeddings in a vector store, an API host and a bucket for the files. | LLM API, Vector store, API hosting, Document storage |    |
| Data warehouse Load, model and query analytics data: a warehouse, a transformation layer and somewhere to explore it. | Warehouse, Transformations, Notebook, Raw file landing |   |
| ML notebook Train and try models: a notebook with a GPU, open models to call, and storage for datasets. | Notebook with GPU, Hosted models, Dataset storage, Results database |   |
| Web app A full-stack side project: frontend hosting, a database, a cache and sign-in. | Hosting, Database, Cache and queues, Sign-in |    |
| LLM chatbot A chat assistant with memory: a model, a place to run it, and a store for conversations. | LLM API, Runtime, Conversation store | |
| Cloud sandbox Learn a hyperscaler without a bill: the sign-up credit and the always-free allowance side by side. | Sign-up credit, Always-free allowance, Edge functions | |
Offers change often; the vendor's page is the final word. Links go straight to the vendor, no affiliate links.