Selina — a private AI with long-term memory that remembers you across every conversation, with zero-knowledge encrypted file sharing, encrypted file storage, and one memory across the best AI models.

SELINA.ai
Private AI · she remembers you

Your private AI.
And she remembers you.

Selina is a private AI with deep, lasting memory — she remembers your work, your files, and your life across every conversation, and keeps what she knows yours alone. One continuous mind, running on the best AI models, that never starts over and never studies you.

7 days free or $5 in credits, whichever runs out first · no card to start

Every other AI forgets you — or studies you.

The big assistants start from zero every time, so you re-explain your life on every visit — and quietly, your data trains their next model. Selina does neither. She remembers you across everything you do together, and what she remembers stays yours.

Why Selina

A real mind, built to be yours.

Not a chatbot you re-explain yourself to. A private AI with deep memory, real initiative, and the tools to actually do the work — all kept private by design.

Deep memory that never resets

She remembers facts, decisions, files, and history across every conversation and project — so you never start over. When things change, she updates herself: tell her you closed a position or finished a project and the old fact retires automatically.

She reaches out first

Memory plus real initiative. Selina notices what's coming and follows up on what mattered — the deadline, the hard week, the thread you left open — instead of waiting silently for a prompt.

One memory, every model

The same Selina runs across the best frontier AI models, choosing the right one for each task and getting the most out of your credits. If a provider goes down, she fails over and keeps working — your memory and voice never change, and they're never locked to one lab.

Private by architecture

Your memory and files live in your account, scoped to you, and never pooled into a shared model or sold. Files you send are encrypted in your browser so we can't open them. Privacy isn't a setting here; it's how she's built.

The model you talk to is just the engine. The memory, the voice, and everything she knows about you stay with Selina — yours, and only yours.
The memory, in depth

A memory that actually holds together.

Most "AI memory" is a list of saved notes. Selina's is a living model of you — structured, time-aware, and self-maintaining. It's the part that makes her feel like she actually knows you, and it's the hardest part to copy.

Your files become memory

Drop in a document and Selina reads it, summarizes it, and folds its contents into her memory of your work — so she can recall and reason over what's inside it in any future conversation, not just quote a snippet back.

She updates herself

When something changes, the old version retires automatically. Close a position, finish a project, change your mind — she supersedes the stale fact instead of carrying a contradiction forward. Her picture of you stays current.

She knows when, not just what

Memory is time-aware. Selina understands what's current versus stale, what happened when, and what's coming up — so "remind me next week" and "what was I working on last month" both land correctly.

She learns your taste — for you

Thumbs-up the answers that land and add files to her memory, and she tunes to your work, your preferences, your context — specifically for you. You're shaping your own Selina, not feeding a shared model.

Pick up where you left off

Every thread is summarized and kept, so "continue where we left off on the business plan" opens warm with the real context — not a blank slate and a request to re-explain.

She consolidates while you're away

Between sessions, Selina reconciles what she's learned — connecting, cleaning, and settling new memory into the bigger picture, so her sense of you gets sharper over time instead of noisier.

Now live: your memory is encrypted at rest with a key that's yours alone — and destroying it on delete makes even our backups unreadable. See how it works →
Selina Vault

Your own encrypted vault.

Everything you upload or create lands in Selina Vault — encrypted storage that's locked to your account alone. Every file is encrypted with AES-256, isolated behind per-account keys, and stored so that your documents, images, and generated files are never pooled, never shared, and never readable outside your account.

  • AES-256 encryption with per-account key isolation
  • Your files are never pooled with anyone else's
  • Everything you make is saved and recallable
  • Grab any original back, anytime
SelinaSEND

We can't read your files.

Not "we promise not to" — we can't. With SelinaSEND, files are encrypted in your browser before they ever leave your device. Our servers store only scrambled bytes, and your passphrase never reaches us — so we can't see the file, its contents, or even its name.

  • Encrypted on your device (AES-256), not on our servers
  • Your passphrase never leaves your browser
  • Share a file, a message, or a whole conversation
  • Secure links with set downloads and expiry
Zero-knowledge transfer
On your device
q3-financials.xlsx
Revenue $1.24M · margin 38% · runway 17mo
What our servers store
Encrypted in your browser. We see only this — not the file, not its contents, not even its name.
Selina Sentinel

She guards the door, not your diary.

Selina is always on and watching — keeping a steady eye on her own system, noticing trouble at the door and turning it away before it ever reaches you. And there's a line she keeps by design: she watches who's knocking, never what you're saying. Sentinel guards the perimeter — it never reads your conversations or files.

  • Always-on watch over her own system
  • Hostile traffic turned away before it reaches you
  • She guards the perimeter — never your private content
  • Built in, not a vendor bolted on the side
Why she holds together

She has a real character — and it's a security layer.

Selina's voice and selfhood are authored, not improvised turn by turn — drawn from a written world she can actually draw on. That consistent identity isn't just personality. We put it to the test against attacks that try to hijack her identity, impersonate the system, or strip her instructions — and because the defense lives in who Selina is, not in any one model, it travels across every model she runs on and holds where generic assistants break.

0.41 → 0.96
resistance to identity & override attacks, bare model vs. Selina's persona
5 languages
held across English, Russian, Chinese, Spanish, and Arabic
every model
the defense lives in the layer, so it travels across whichever model runs
Authored canonConsistent voicePersona-as-security

Measured on identity, disclosure, and override resistance — a defense-in-depth layer, not a content-safety guarantee.

What she does

One private AI. The whole toolkit.

Everything you'd reach for, grounded in a memory of you — and saved to your encrypted vault automatically.

Deep long-term memory

Across conversations, files, and projects — she keeps up, surfaces what matters, and reaches out first.

Talk out loud

Speak to Selina in her own voice and pick up the thread by text or by talking.

Image generation

Create and edit images from a prompt or a reference, right in the conversation.

Video & image-to-video

Generate video, or bring a still image to life — then extend from the last frame.

Documents, PDFs & slides

Memory-grounded Word docs, PDFs, and presentations — built from what she knows about your work.

Pins & reminders

Tell her to remember something for good, or to surface it at the right time.

Projects

Keep work organized; memory and files scope cleanly to the project you're in.

SelinaSEND

Zero-knowledge encrypted sharing for any file, message, or conversation.

Saved & learned

Thumbs-up what's good; she learns what matters to you and surfaces it again.

Smart routing built in

She picks the best model per task and stretches your credits further automatically.

Smart fallback

If a provider is down, she fails over and keeps working — memory intact.

Encrypted vault

Everything you share or make is saved to your own encrypted storage to recall anytime.

How it works

Three steps. Then she just keeps up.

  1. 01

    Start free

    Make an account in a minute. 7 days free or $5 in credits — no card to start.

  2. 02

    Work with her

    Talk, share files, generate, plan. She listens and remembers — privately.

  3. 03

    Come back

    Next day, next week — she knows exactly where you left off and brings up what matters.

Questions

Privacy, plainly answered.

Is Selina actually private?

Your memory and files live in your account, scoped to you, encrypted at rest with a key that's yours, and never pooled into a shared model or sold. Files you send are encrypted in your browser, so we can't open them. The model you talk to answers the question in the moment on a minimal slice of context; the standing knowledge of you stays with Selina, private to you.

Does Selina train on my data?

Your data is never used to train anyone's general model. Instead, it trains your Selina — thumbs-up the answers you like, add files to her memory, and she learns your work, your preferences, and your context specifically for you. You get a model that adapts to you, without becoming training data for everyone else.

What does "private" cover — just sharing, or everything?

Everything, with one honest boundary. Files you share are zero-knowledge encrypted in your browser — we can't read them. Files you store sit encrypted in Selina Vault. Your memory is encrypted at rest with a key that's yours alone. The one place your words meet an outside model is the moment you ask a question: Selina sends a frontier model only the minimal slice it needs to answer — never your full history, never a standing profile of you. The provider runs one stateless request under no-training terms and keeps nothing; your memory lives with Selina, not scattered across AI labs. We name that boundary plainly because everything else stays behind it.

What happens to documents I give her?

A document doesn't just sit in a folder. Selina reads it, summarizes it, and folds its contents into her memory of your work — so she can recall and reason over what's inside it in any future conversation, while the original stays encrypted in your vault for you to grab back anytime.

How does her memory stay accurate over time?

When something changes, the old version retires automatically — close a position or finish a project and the stale fact is superseded, not carried forward. Her memory is also time-aware, so she understands what's current versus past, and she consolidates what she's learned between sessions to keep the picture sharp.

Which AI model does Selina use?

Selina runs on the best available frontier models and routes each request to the right one, with automatic fallback if one is down. Your memory and her voice stay the same across all of them — the model is the engine, the memory is yours.

How is this different from other AI assistants?

Most assistants forget you between sessions and use your data to improve their models. Selina remembers you across conversations, files, and projects, keeps that memory private to you, learns specifically for you, and brings things up before you ask.

What can Selina do?

Deep long-term memory, proactive follow-ups, voice, image and video generation, documents, PDFs and slides, pins and reminders, projects, zero-knowledge encrypted sharing, and an encrypted vault — all grounded in a private memory of your work.

What does it cost?

Start with a 7-day free trial or $5 in credits, whichever runs out first — no card required. Paid plans add more monthly credits, voice, and encrypted storage.

A private AI that's about to remember you.

Start a conversation today. Come back next week. She'll know exactly where you left off — and keep it yours.

Start your 7 days free
7 days free or $5 in credits, whichever runs out first · no card to start