GreenPT runs every conversation on 100% renewable energy inside European data centers, and it claims a 40% lower CO₂ footprint than US hyperscalers. That single promise, sustainable AI chat that keeps your data in the EU, is the whole pitch behind this growing ChatGPT alternative from the Netherlands.
This GreenPT review covers what it is, what it costs, whether there is a free version, how the API works, and whether the green claims actually hold up. You will get the exact pricing in euros, the model lineup behind the chat, and an honest look at where the sustainability story gets complicated. By the end you will know if GreenPT fits your workflow or if a multi-model setup makes more sense.
The Key Takeaways
- GreenPT is a European, privacy-first AI chat platform running open-source models on 100% renewable energy in EU data centers.
- Pricing starts at €4.50/month for Starter (15 prompts per day) and €17.50/month for unlimited Professional and Teams plans.
- There is no permanent free plan, but every plan includes a 14-day free trial with no credit card required.
- The GreenPT API is OpenAI-compatible, costs from €0.25 per million input tokens, and gives new accounts €5 in free credits.
- GreenPT claims a 40% CO₂ reduction and a PUE of 1.25 versus the 1.55 industry average, though critics note training emissions still count.
What Is GreenPT?
GreenPT is an AI chat platform built around three ideas, European hosting, renewable energy, and privacy by default. Founded by Robert Keus, it markets itself as “the green AI and privacy-friendly GPT chat” and runs entirely inside EU data centers operated by Scaleway in Paris. The company positions itself as a B Corp and frames the product as “AI you don’t have to apologise for.”
Instead of building its own frontier model, GreenPT runs open-source models and rebrands them. The everyday chat model, GreenL, is based on Mistral Small 3.2 (24B) with Dutch fine-tuning. The advanced reasoning and vision model, GreenR, is built on GPT-OSS 120B, and a third option, Gemma4, uses Google’s Gemma 4 (31B) with a 256k context window. An internal router picks the right model for each task.
The platform reaches well beyond a single chat box. It bundles AI Chat with document analysis and speech-to-text, an OpenAI-compatible API, a privacy-first GreenPT Search, a custom chatbot builder called Frida, and real-time CO₂ and energy insights shown per conversation. Every plan stores data in the EU and never trains models on your inputs, which is the core privacy promise.
GreenPT Pricing and Plans
GreenPT cost is one of the most searched questions, and the answer is refreshingly simple. There are three subscription tiers plus a separate API option, all billed in euros. The cheapest plan caps you at 15 prompts per day, while both higher tiers come with unlimited prompts.
| Plan | Price/month | Prompts | Best for | Key features |
|---|---|---|---|---|
| Starter | €4.50 | 15 per day | Light personal use | AI Chat, document upload, AI Search, API access |
| Professional | €17.50 | Unlimited | Power users | Unlimited projects, document analysis, AI Search, API |
| Teams | €17.50 | Unlimited | Small teams | Everything in Pro plus workspaces, AI note-taking, prompt library, Drive integration |
| API-only | Pay as you go | Token-based | Developers | OpenAI-compatible endpoint, €5 free credits |
Every subscription includes EU data storage, no model training on your inputs, and a per-chat energy readout. At €4.50/month, the Starter plan undercuts most mainstream AI subscriptions, though the 15-prompt daily cap will frustrate heavy users. For unlimited use you are looking at €17.50/month, which sits just below the typical $20 price of ChatGPT Plus. If you want the wider picture, our AI pricing comparison breaks down how the major tools stack up.
Is GreenPT Free?
No, GreenPT is not permanently free. There is no forever-free tier the way ChatGPT offers one. What you do get is a 14-day free trial on every plan, with full feature access and no credit card required, so you can test the chat, search, and document tools before paying anything.
Developers get a separate freebie. Creating an API-only account comes with €5 in free credits, enough to run thousands of short prompts through the cheaper model before you spend real money. If you are hunting for no-cost options more broadly, our roundup of AI free trials covers which tools give you the most without a subscription.
GreenPT API and Chat Completions Endpoint
The GreenPT API is designed to be a drop-in replacement for OpenAI. It exposes a standard chat completions endpoint, so existing code written for OpenAI’s SDK works after you swap the base URL and key. That OpenAI compatibility is the main selling point for developers who want EU-hosted inference without rewriting their stack.
Token pricing is straightforward and undercuts most US providers. The everyday model, GreenL, costs €0.25 per million input tokens and €0.80 per million output tokens. The stronger reasoning model, GreenR, runs €0.35 per million input and €0.95 per million output. API access requires an active Pro, Teams, or API-only subscription, and as noted above, new API accounts start with €5 in free credits.
GreenPT Search and Other Features
GreenPT Search is the platform’s privacy-first answer engine. It returns AI-generated answers without the tracking and ad profiling baked into mainstream search, keeping queries inside the same EU infrastructure as the chat. It is bundled into every paid plan rather than sold separately.
Beyond search, the standout extra is Frida, a no-code builder for custom chatbots that teams can deploy on their own content. The Teams plan layers on shared workspaces, an AI note-taker, a reusable prompt library, and OneDrive and Google Drive integration. Running across all of it is the energy dashboard, which shows the estimated electricity and CO₂ cost of each conversation, a transparency feature you will not find on most rivals.
How Green Is GreenPT, Really?
This is where an honest review has to slow down. GreenPT’s environmental numbers are strong on paper. The company cites a 40% CO₂ reduction versus US hyperscalers from the Scaleway Impact Report 2025, a Power Usage Effectiveness of 1.25 against a 1.55 industry average, a Water Usage Effectiveness of 0.25 versus a 1.8 sector average, and model compression that trims compute by 20 to 30%. The data centers run on renewable energy and reuse server heat for community heating.
The catch is what those figures leave out. As a detailed independent review on Medium points out, GreenPT is not carbon-negative, and the open-source models it runs were originally trained on conventional infrastructure using enormous amounts of power. GreenPT’s gains apply to hosting and inference, not to the upfront training that created the models in the first place. That is still a real improvement, just a narrower one than “sustainable AI” might suggest. For the bigger context, see our deep dives on AI’s environmental impact und how much water ChatGPT uses.
What Users Say in Reviews
Early user sentiment skews positive, especially among privacy-conscious and eco-minded users. On the App Store, where GreenPT ships a “Sustainable AI Chat” app, reviewers describe it as “very advanced, articulate, and accurate” and praise it as a real eco-friendly alternative that feels close to the mainstream tools. The EU-first data handling is a recurring reason people switch.
The criticism is more measured than hostile. Reviewers note that the open-source models, while capable, do not always match the absolute frontier performance of the latest GPT or Claude releases, and the 15-prompt daily cap on the Starter plan draws complaints. If you want a similarly green-focused competitor to weigh against it, our EcoGPT review covers another platform chasing the same sustainability angle.
GreenPT vs ChatGPT
The clearest way to judge GreenPT is against the tool most people already use. The two platforms target different priorities, GreenPT leads on hosting, privacy, and energy transparency, while ChatGPT leads on raw model power and ecosystem.
| Factor | GreenPT | ChatGPT |
|---|---|---|
| Hosting | EU-based (France) | Global, US-centric |
| Energy | 100% renewable, shown per chat | Not publicly disclosed |
| Privacy | No training on inputs, GDPR-first | Controls depend on plan |
| Models | Open-source (Mistral, GPT-OSS, Gemma) | Proprietary GPT |
| Entry price | €4.50/month | ~$20/month (Plus) |
The honest trade-off is performance versus principles. If frontier-level reasoning matters most, ChatGPT and its rivals still lead. If EU data residency and a transparent energy footprint matter more, GreenPT makes a strong case at a lower entry price.
In case you would rather not lock yourself into one provider’s model lineup, an app like Fello AI takes a different route. It gives you Claude, ChatGPT, Gemini, Grok, and DeepSeek under one subscription, so you can switch to whichever model fits the task instead of being limited to a single vendor’s open-source set.
Schlussfolgerung
GreenPT is a credible, thoughtful AI chat platform for anyone who cares about where their data lives and how their AI is powered. The pricing is fair, starting at €4.50/month with a real 14-day free trial, the OpenAI-compatible API is a smart touch for developers, and the per-chat energy dashboard is something no mainstream rival offers. Just go in clear-eyed about the green claims, which cover inference rather than the original model training.
If your priority is EU privacy and a lower-carbon footprint, GreenPT is well worth the trial. If you need the absolute strongest model on every task, you will likely want access to multiple frontier models instead. Start with the free trial, push it against your real workload, and decide from there.
FAQ
Is GreenPT free?
No. There is no permanent free plan, but every tier includes a 14-day free trial with no credit card required. Paid plans start at €4.50/month, and API-only accounts get €5 in free credits.
How much does GreenPT cost?
The Starter plan is €4.50/month with 15 prompts per day. Professional and Teams plans are both €17.50/month with unlimited prompts. API usage is billed per token from €0.25 per million input tokens.
What models does GreenPT use?
GreenPT runs rebranded open-source models. GreenL is based on Mistral Small 3.2, GreenR on GPT-OSS 120B, and Gemma4 on Google’s Gemma 4, all routed automatically based on the task.
Is the GreenPT API OpenAI-compatible?
Yes. The API exposes a standard chat completions endpoint, so code built for OpenAI’s SDK works after you change the base URL and API key. New accounts receive €5 in free credits.
Is GreenPT actually sustainable?
Its hosting and inference run on 100% renewable energy with a strong 1.25 PUE, and it claims a 40% CO₂ reduction versus US hyperscalers. However, it is not carbon-negative, and the open-source models were originally trained on conventional infrastructure.
