AI that actually
knows you. Privately.
nexie's Personal Context Engine builds a private layer of knowledge about you — your preferences, past conversations, goals, and expertise — and uses it to make every AI interaction better. The knowledge stays yours.
The problem with AI memory today
The most useful thing about having a personal assistant isn't that they're smart. It's that they know you. They remember that you prefer concise summaries. They know your company's style guide. They recall that you worked through a similar problem six months ago and what you concluded. That accumulated context is what makes an assistant genuinely valuable.
Today's AI tools have a memory problem. Each session starts cold. The AI knows nothing about you, your history, your preferences, or your context. You re-explain yourself every time. And the "memory" features that do exist — like ChatGPT's memory or Gemini's personalization — work by storing your information on corporate servers, tied to your account, potentially reviewed by employees, and possibly used to train future models.
You get the convenience. You pay with your privacy.
What a Personal Context Engine is
A Personal Context Engine (PCE) is a system that stores a structured understanding of you — your knowledge, preferences, context, goals, and history — and makes that context available to AI systems privately. It is the difference between an AI that starts from zero every time and one that knows you and can build on your prior work.
The key distinction is ownership. A PCE that belongs to a platform is just another form of data harvesting with a better user experience. A PCE that belongs to you is a genuine tool for augmenting your intelligence.
How nexie's Personal Context Engine works
You build your context over time
As you use nexie, it privately records the things that matter: your areas of expertise, your preferences, your goals, the projects you are working on, and insights from past conversations. You can also add context directly: paste in a document, describe your situation, or tag notes as important.
Context is stored where you control it
Your personal context lives in storage you control — not on a corporate server indexed to your email address. It is structured to be useful and portable, not locked into a single product's data format.
Queries are enriched privately
When you ask nexie a question, the PCE surfaces relevant context from your personal knowledge base and uses it to give the underlying AI model the background it needs — without exposing your identity or raw personal data to the model provider. The model gets a well-framed query. You get a much better answer.
Context travels across AI services
Unlike fragmented chat histories across ChatGPT, Claude, Gemini, and Perplexity, your nexie context is a single private knowledge base that works across all the AI models you use. One context, not a dozen disconnected histories.
You own it, completely
Export it. Edit it. Delete it. Keep it offline. The Personal Context Engine is a tool you own, not a profile a company builds about you.
Why this is a category-defining difference
Current AI tools face a tradeoff: useful memory requires storing personal data, and personal data stored in the cloud is personal data at risk. Most products resolve this tradeoff by choosing usefulness and accepting the privacy cost. nexie resolves it by keeping the memory in your control.
This is not a minor feature difference. It is a fundamental architectural choice about who AI serves and who owns the value it creates.
"The personal context you build with an AI over time is incredibly valuable. The question is: whose asset is it? Right now, it belongs to the platform. We think it should belong to you." — Mary Jesse, Founder & CEO
Practical examples
Writing
nexie knows your writing style, preferred tone, common topics, and past drafts. You never re-explain your voice. Every writing session starts with full context about who you are and how you communicate.
Research
nexie knows what you already understand and what you are trying to learn. It can build on prior research sessions, avoid repeating things you already know, and connect new information to your existing knowledge base.
Work
nexie knows your role, your organization's terminology, and the projects you are working on — without any of that information ever leaving your control to live on a corporate AI server.
Personal
nexie can maintain the kind of ongoing context that makes advice genuinely useful: your goals, your values, the decisions you are working through. Like a journal that can answer back.
Experience AI memory that belongs to you.