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Free Tools & Hosting for Starters
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When starting a new project (whether it is an AI application, mobile app, web app, or data engineering pipeline), cost shouldn't be a barrier. Below is a curated list of free and limited tiers that allow you to build, deploy, and showcase your projects for free.

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1. Retrieval-Augmented Generation (RAG) & AI
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Building a RAG app requires an LLM provider, a Vector Database, and an orchestration framework.

*   **Groq Cloud**: Offers free API access to state-of-the-art models like Llama 3, Gemma, and Mixtral with high rate limits. Perfect for local prototyping.
*   **Pinecone**: Provides a free starter index with up to 2GB storage, which is more than enough for thousands of document embeddings.
*   **Qdrant Cloud**: Offers a free tier cluster with 1GB of RAM, supporting advanced hybrid and vector search.
*   **Cohere**: Free developer keys for embeddings and Rerank APIs, very useful for enhancing RAG retrieval accuracy.
*   **Hugging Face Spaces**: Host your Python RAG demos (built with Streamlit, Gradio, or Chainlit) for free on standard CPU instances.

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2. Mobile App Dev
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Developing mobile applications (e.g., using React Native or Flutter) requires builds and backend services.

*   **Expo EAS (Expo Application Services)**: Free build tier to compile your React Native apps into Android (`.apk`/`.aab`) and iOS (`.ipa`) binaries without needing a powerful local machine or Mac.
*   **Supabase**: 2 free projects with a full PostgreSQL database, built-in Authentication, File Storage (up to 1GB), and Realtime capabilities.
*   **Firebase (Spark Plan)**: Free hosting, Authentication, Cloud Firestore (NoSQL database), and Cloud Storage. Excellent integration with mobile frameworks.

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3. Web App Dev
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Deploying web frontends and backends.

*   **Vercel**: The best platform for hosting React, Next.js, and static websites. Includes a free hobby tier with automatic CI/CD from GitHub.
*   **Netlify**: Free tier for static websites and serverless functions, featuring instant rollbacks and form handling.
*   **Render**: Free tier for hosting web services (Node.js, Python, Go, Rust), static sites, and PostgreSQL databases (note: free servers spin down after 15 minutes of inactivity).
*   **GitHub Pages**: Completely free hosting for static sites (pure HTML/JS or built sites like single page apps) directly from GitHub repos.

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4. Data Engineering
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Ingesting, storing, and transforming data.

*   **MotherDuck**: Free serverless DuckDB in the cloud. Includes 10GB of storage and makes querying local or remote files fast using analytical SQL.
*   **Google BigQuery Sandbox**: No credit card required. Gives you 10GB of active storage and 1TB of query processing per month.
*   **Mage.ai / Airbyte (Local)**: Open-source pipelines that you can run locally for free to orchestrate and ingest data.

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5. Data Visualisation
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Creating and sharing dashboards.

*   **Streamlit Community Cloud**: Connects to your GitHub repository and deploys your Streamlit Python dashboards for free.
*   **Looker Studio**: Free to use with native Google connectors (Google Sheets, BigQuery, Google Analytics) to design interactive dashboards.
*   **Tableau Public**: Free service to publish and share Tableau visualizations publicly.
*   **Gradio**: Free deployment of interactive machine learning interfaces directly on Hugging Face Spaces.