# GreenCube

> GreenCube is an AI you own. It runs on your own computer, with no usage limits, no subscription and no wifi needed. Pay once: €9.99 (US$9.99).

Instead of renting AI from a company's servers, you buy GreenCube once and the AI runs on your own computer. Nothing is metered, it keeps working without internet, and your chats, documents and images stay on your machine.

## What you can do with it

- **Chat and write**: ask anything; draft emails, essays and applications; rewrite the message you keep getting wrong
- **Code**: write and explain code, scripts and spreadsheet formulas
- **Read anything**: PDFs, contracts, reports, photos, screenshots and charts, summarised and explained
- **Study**: turn a topic or a document into flashcards, quizzes, study tables and clean notes
- **Make real files**: PowerPoint presentations, documents and small web pages you keep and share
- **Look things up**: an optional Online switch searches the web; it is off by default

## Coming soon

- **Build apps and websites by describing them**, plus a full code editor with an AI assistant and a terminal
- **Automations**: give it a job on a schedule, like a morning inbox digest, and get the result on your phone
- **Mac version**

## Key facts

- Platform: Windows 10 and Windows 11
- Tiers: GreenCube reads the machine it is installed on and sorts it into one of four tiers, which set its defaults. Seed (about 8 GB, no graphics card), Sprout (16 GB or more with no graphics card, or 8 GB with a 4 GB card), Bloom (a strong card with 8 GB or more, or a 4 GB card with 16 GB of memory), Thrive (a strong card with 8 GB or more alongside 24 GB or more of memory)
- Memory decides how much fits; a graphics card decides how fast it runs. That is why a card moves a machine further up the list than extra memory does, and why 32 GB with no card is still Sprout: the extra memory widens the context window rather than speeding up the words
- Every tier gets unlimited answers, document reading, flashcards, quizzes, tables and real PowerPoint files. Only model-written slide decks, web pages, image handling and reply continuation differ by tier
- No tier costs more than another: all four are the same app at the same one-time price. Every capability a tier switches off is overridable in Settings (Auto / On / Off), so a limit is always a default and never a cap. The one exception is image generation, which needs 12 GB of memory or more
- Price: €9.99 (US$9.99), one-time payment. No subscription, no recurring fees, no usage limits
- Works fully offline after the first sign-in and model download
- The sign-in only confirms purchase; it never receives conversations, documents or images
- An optional Offline/Online switch enables live web search. It is off by default — only when switched on do searches reach the internet
- Honest limitation: large cloud models are more capable than a model that fits on a personal computer. GreenCube trades some capability for privacy and ownership
- Company: Edunexis SL

## Core pages

- [Home](https://greencube.app): what GreenCube is and what it does
- [Why GreenCube](https://greencube.app/how-it-works): where the AI actually runs, how a local AI works, and the four things that change when it's on your computer
- [Your data](https://greencube.app/your-data): exactly what stays on your machine, and every time GreenCube uses the internet
- [AI & the planet](https://greencube.app/ai-environmental-impact): verified figures on data centre electricity, emissions and water, including the claims that don't hold up
- [What you get](https://greencube.app/what-you-get): everything GreenCube makes, the four hardware tiers, and why every limit is overridable
- [Buy GreenCube](https://greencube.app/buy): purchase page, €9.99 one-time
- [Español](https://greencube.app/es/): Spanish version of the site

## Reference

- [Does ChatGPT train on your data?](https://greencube.app/does-chatgpt-train-on-your-data): plan-by-plan breakdown, who can read your chats, and how to switch training off
- [How much water does AI use?](https://greencube.app/how-much-water-does-ai-use): the research, the real numbers, and why credible estimates disagree
- [Blog](https://blog.greencube.app/blog): guides and comparisons with other local AI tools

## Contact

- Support: support@greencube.app
- [Privacy policy](https://legal.greencube.app/privacy)
- [Terms](https://legal.greencube.app/terms)