Communication & Synthesis
OpenAI's conversational AI for writing, research, coding, and everyday productivity.
From $20 / mo
Visit WebsiteProductivity Engines
AI writing and summarisation built directly into Notion's all-in-one workspace.
From $10 / mo
Visit Website4-P Sovereignty Matrix
Lumen Trust Notes
ChatGPT
ChatGPT is fully cloud-based with no local processing; all inputs are handled on OpenAI servers, making data sovereignty low. Its mission centres on broadly beneficial AI, with transparent safety research and a strong free tier that democratises access. Recommended for general productivity, writing, and research — avoid sharing sensitive PII or confidential commercial data.
Notion AI
Notion AI processes data on Notion's cloud infrastructure via third-party model providers (OpenAI, Anthropic); there is no self-hosted or local option. Its add-on pricing model is reasonable and its deep integration with existing workflows provides genuine productivity value without dark patterns. Ideal for teams already on Notion, but review Notion's sub-processor data agreements before storing sensitive client information.
Pricing
ChatGPT
From $20 / month
Notion AI
From $10 / month
Disclaimer
Scores are based on publicly available information and Lumen's auditing criteria at the time of assessment. They may not reflect recent changes.
This comparison is not a legal or security audit. Read our full disclaimer.