General-purpose AI assistant
Category: Text & Copy. Pricing: Free: 0 USD per month (billed monthly). Last modified: 2026-09-29.
The most popular AI assistant. Versatile across writing, coding, analysis, and brainstorming.
Not editorially tested: One AI Guide has not published a complete hands-on test record for this tool.
Published by LUMIVEX for One AI Guide.
Editorial lead: Said El Moussaoui. Our methodology is published at /how-we-rate.
Official vendor website: see the vendor link below.
These are sourced comparison facts, not hands-on test results. Partial facts need more confirmation; stale facts need a fresh check.
Free: $0.00 per month
ChatGPT PlansYes
Introducing data residency in EuropeNot currently confirmed
Scope: OpenAI business services governed by the Data Processing Addendum; Status: dpa_available
OpenAI Data Processing Addendumeu; us
Introducing data residency in EuropeYes
ChatGPT PlansChatGPT is a text & copy tool. General-purpose AI assistant.
ChatGPT is Free: 0 USD per month (billed monthly). Always check the vendor's site for the latest plans before signing up.
The catalog currently records ChatGPT's pricing model as Free. Check the vendor's site because availability, limits, and plan terms can change.
Common use cases include Daily writing, brainstorming, and analysis at work, and Code generation and debugging in any major language.
The One AI Guide catalog currently highlights these strengths: Largest plugin and GPT marketplace, 200+ workflows on launch day; Voice mode handles 30+ languages with natural turn-taking; Custom GPTs let you persist behavior across team members.
These links are external reading from independent third-party editorial pages, not One AI Guide reviews. We link out instead of republishing their text, ratings, counts, or testing claims.