Moon AI
Stellarr Studio SAS, France
from€9.90per person per month, VAT included
Free plan with no credit card. Lune at €9.90, Étoile, recommended, at €19.90, always with no commitment.
ChatGPT Plus
OpenAI OpCo, LLC, United States
€23 a month
€23 a month. Checked on November 13, 2026 on the official pricing page.
The same twelve criteria, by theme.
Prices checked on November 13, 2026; other criteria checked on August 2, 2026 on both companies’ public pages. If anything differs, the official page prevails.
| Criterion | Moon AI | ChatGPT Plus |
|---|---|---|
| Price | ||
| Entry priceThe price of the first paid tier, as shown to a visitor in France. | Free with no credit card, then €9.90 per person per month, VAT included (Lune) | €23 a month, as shown on their pricing page |
| Free planWhether there is a tier you can use without paying. | Yes, no credit card | Yes |
| Models | ||
| AI models availableNumber and range of models included in the subscription. | More than 100 models from several providers | 7 entries, 1 provider (OpenAI) |
| Privacy policy | ||
| Company based inThe company that runs the service and the country of its headquarters. | France (Stellarr Studio SAS) | United States (EEA entity in Ireland) |
| Data hostingWhere processing takes place, as publicly documented. | App and storage in France (OVHcloud); requests processed by the model provider | Outside the EEA, including the United States |
| Reversible masking before sendingReplacement of the sensitive data detected before it is sent to the models. | Moon Blur, more than 150 categories | Not documented |
| Creation and automation | ||
| Office documentsGeneration of Word, Excel, PowerPoint and PDF files. | Word, PDF, Excel, PowerPoint | Excel, PowerPoint and Sheets add-ons |
| AutomationsAutomated tasks without writing code. | Agents and routines, no visual builder | Scheduled tasks |
| Business connectorsNative integrations with work tools. | Dozens of connectors | Yes, apps connected to internal tools |
| Devices and language | ||
| Mobile appsNative apps published on the app stores. | Native iOS and Android | Yes |
| Coding agent in the terminalCommand-line tool for developers. | Moon CLI | Yes (Codex, extended usage) |
| FrenchInterface and support in French. | Interface and support | Yes (French interface) |
| Start for freeStart | Official pricing page | |
What ChatGPT Plus does well
- Access to OpenAI’s latest reasoning models starting with the Plus tier: the official comparison table lists GPT-5.6 Sol, GPT-5.6 Sol Pro, GPT-5.6 Terra and GPT-5.6 Luna.
- A broad product ecosystem included in the subscription: projects, scheduled tasks, custom GPTs, extended deep research, voice mode, data analysis and image generation.
- Codex, OpenAI’s coding agent, comes with extended usage starting with the Plus plan, along with ChatGPT Work on desktop, web and mobile.
- Large context windows on Plus, according to the official table: 54K for the instant model and 256K for the reasoning models.
- A wide price range to move up or down: Free at €0, Go at €8, Plus at €23 and Pro from €103 a month.
What Moon AI does differently
- Moon AI gives you more than 100 models from different providers in one subscription (OpenAI’s GPT, Anthropic’s Claude, Google’s Gemini and Gemma, DeepSeek, Mistral, Meta’s Llama, xAI’s Grok, Alibaba’s Qwen, Cohere’s Command R+, Moonshot’s Kimi, MiniMax, and Moon 6, the in-house model). ChatGPT Plus offers its own company’s GPT family.
- Moon AI’s app and storage are hosted by OVHcloud in Strasbourg and Roubaix. Requests sent to third-party models go through Moon Blur first, which masks the sensitive data it detects. OpenAI’s European privacy policy, for its part, states that data is processed on servers outside the EEA, including in the United States.
- Moon Blur masks the sensitive data it detects before it is sent to third-party models (more than 150 categories in its catalog), then puts the real values back in the response. As of August 2, 2026, the OpenAI public pages we reviewed do not describe an equivalent mechanism.
- Moon AI bills per seat, with workspace management from the first tier and 20% off each extra seat in the same workspace. At ChatGPT, the official FAQ says Plus is meant for individuals and that multi-user setups fall under Business and Enterprise.
- Moon AI publishes its prices in euros, VAT included, per seat per month, from €9.90, with a Free plan that needs no credit card and no commitment. ChatGPT’s pricing page for France shows Free at €0, Go at €8, Plus at €23 and Pro from €103 a month, without saying whether these amounts include VAT: the two price lists cannot be compared directly.
Limits to know about
Facts you can check on the company’s public pages, not value judgments.
- The subscription gives access to the GPT model family from OpenAI. As of August 2, 2026, the official comparison table we reviewed lists no models from other companies.
- On the row “Content is used to train our models”, the official table says “Opt-out available” for Free, Go, Plus and Pro: the setting is in the account’s data controls.
- The European privacy policy, updated on June 4, 2026, states that data is processed and stored on servers outside the EEA, Switzerland and the United Kingdom, including in the United States.
- The row “Data residency: US, EU, UK, JP, CA, KR, SG, IN, AU, UAE” in the official comparison table is marked “No” for the Plus plan, as it is for Free, Go and Pro.
- The official FAQ says Free, Go and Plus are meant for individuals: multi-user management falls under Business, available from two users, and Enterprise.
So which one should you choose?
Choose ChatGPT Plus
Choose ChatGPT Plus if you want the most direct access to OpenAI’s latest reasoning models and its built-in ecosystem (Codex, projects, scheduled tasks, custom GPTs), for individual use where processing outside the EEA and a choice of model providers are not deciding factors.
Choose Moon AI
Choose Moon AI if you want to compare several model providers in one subscription, reversible Moon Blur masking of the sensitive data detected before it reaches third-party models, per-seat billing with a workspace from the first tier, plus agents and routines (scheduled or triggered by webhook), office document generation and an interface in French.
Frequently asked questions
Does ChatGPT Plus cost more than Moon AI?
The two price lists are not on the same basis. Moon AI publishes its prices in euros, VAT included, per seat per month, from €9.90 (see our pricing). On August 2, 2026, ChatGPT’s pricing page for France showed Free at €0, Go at €8, Plus at €23 and Pro from €103 a month, without saying whether these amounts include VAT. A direct price comparison is therefore not possible from the public pages.
Does my data stay in France with Moon AI?
Moon AI’s app and storage are hosted by OVHcloud in Strasbourg and Roubaix. Messages sent to third-party models (GPT, Claude, Gemini and the others) go to their provider; they first go through Moon Blur, which masks the sensitive data it detects (more than 150 categories in its catalog, and people’s names only if they are in your list of terms), then restores it on return. On the ChatGPT side, the European privacy policy updated on June 4, 2026 states that data is processed and stored on servers outside the EEA, including in the United States.
How many models does each subscription include?
ChatGPT’s official comparison table lists six named models for the Plus plan (GPT-5.5 Instant, GPT-5.6 Sol, GPT-5.6 Sol Pro, GPT-5.6 Terra, GPT-5.6 Luna, GPT-5 Thinking Mini) plus a “Legacy models” row, all from OpenAI, so a single provider. Moon AI includes more than 100 models from several providers in the same subscription (see the features).
Are my conversations used to train the models?
On ChatGPT’s pricing page, the row “Content is used to train our models” says “Opt-out available” for Free, Go, Plus and Pro: the setting is in the account’s data controls. At Moon AI, the sensitive data detected is masked by Moon Blur before it is sent to model providers, which limits what they can receive.
Sources
Prices and features of the services listed change over time: if anything differs, the company’s official page prevails. Let us know about any inaccuracy at contact@stellarrstudio.com and we will fix it.