Communication & Synthesis
OpenAI's conversational AI for writing, research, coding, and everyday productivity.
From $20 / mo
Visit WebsiteResearch & Analysis
AI-powered answer engine that gives cited, real-time answers instead of a list of links.
From $20 / 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.
Perplexity AI
Perplexity processes all queries on cloud infrastructure with no local option, keeping sovereignty low. Its transparent citation model and a genuinely useful free tier represent both an ethical commitment to honest information and broad access parity. Strongly recommended for research, fact-checking, and staying current — treat it as a research assistant, not a replacement for primary source verification.
Pricing
ChatGPT
From $20 / month
Perplexity AI
From $20 / 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.