Remember everything.
Recall what matters.
Notes, flashcards, AI assistant, and task boards — one app that replaces four. Search anything you've ever learned, by meaning, not filename.
One app.
Four tools replaced.
AI assistant, flashcards, knowledge graph, semantic search, and task boards — all connected.
Talk to your knowledge.
Ask questions in text or voice. Cortex answers from your graph — not the internet. Powered by natural voice synthesis for hands-free learning.
Tap to ask your knowledge graph
Try: "What patterns worked in low-vol regimes?"
Pricing
Start free. Scale when you need to.
Every plan includes the full knowledge graph. Pay for volume and features.
Student
Replaces Obsidian, ChatGPT, Anki, and Trello — in one app.
- 50 MB storage
- Knowledge graph + notes
- AI assistant with voice
- Flashcards + spaced repetition
- Kanban boards + task sharing
- Video ingestion
- Recall search (100 / day)
Pro
For professionals who learn and build every day.
- 5 GB storage
- Everything in Student
- Unlimited notes + queries
- Sentinel monitoring
- Observatory + Sandbox
- 1 API key (1K calls/day)
- Priority support
- +$2 / GB overage
Agent
For teams and AI agents that need memory infrastructure.
- 20 GB storage
- Everything in Pro
- Unlimited API keys
- Agent authentication
- Scoped permissions
- Audit trails
- 50K API calls / day
- +$1 / GB overage
Need more space? Add storage anytime — 10 GB for $5/mo, 50 GB for $15/mo, 100 GB for $25/mo. Self-hosted is always free.
Built For
Anyone who learns for a living.
Same system. Different domains. Cortex adapts to how you think.
Capture everything. Lose nothing.
Notes, lectures, videos, textbooks — all ingested and linked. Ask a question, get answers from everything you've ever learned.
momentum strategies from Q3
that lecture on distributed systems
replication patterns in UE5
Auto-generated flashcards. Spaced repetition.
Cortex turns your notes into flashcards and schedules reviews based on your confidence. Stop re-reading — start recalling.
12 cards due today
86% retention this week
exam deck ready for finals
Find what you forgot you knew.
Semantic search across your entire knowledge base. Cortex surfaces connections you didn't know existed — in milliseconds.
how does volatility connect to my backtests?
that paper about graph neural nets
how we fixed the desync bug
Turn knowledge into action.
Kanban boards generated from your graph. Share individual tasks with collaborators — they don't need a Cortex account.
study plan for finals
sprint board for the prototype
shared reading list
Talk to your graph. Out loud.
Voice-enabled AI that answers from your knowledge — not the internet. Hands-free learning, wherever you are.
"What did I learn about CAP theorem?"
"Summarize my notes from last week"
"Quiz me on Chapter 4"
Cortex for Teams
Build Skills that plug
into your workflow.
Skills are custom integrations that connect Cortex to the tools you already use. Pipe in docs, sync tasks, automate recall — across your entire team.
Custom Skills
Connect any API, database, or service. Skills run server-side and extend what Cortex can recall and act on.
Shared Knowledge
Teams share a graph. Individual notes stay private. Team knowledge compounds over time — new members get up to speed instantly.
API-First
Full REST API with scoped permissions. Build agents, dashboards, or pipelines that read and write to your team's knowledge graph.
Case Study
Who it's for
Research Teams
Ingest papers, tag findings, surface contradictions. New team members query years of institutional knowledge on day one.
Startups
Shared product knowledge base. Customer research, technical specs, and competitive intel — all searchable by meaning.
Students & Study Groups
Pool lecture notes, share flashcard decks, split study tasks. Everyone benefits from what anyone learns.
Seasons of Eden
Unreal Engine 5.7 + Cortex Knowledge Infrastructure
Seasons of Eden is an open-world RPG built in Unreal Engine 5.7 — and the first game developed with Cortex as the knowledge backbone for the entire development workflow.
What Cortex Powers
MCP Tool Server
Custom Skills that connect Claude directly to the Unreal Editor — spawning actors, creating Blueprints, configuring materials, all from natural language.
Architecture Decisions
Every system design decision (networking, combat, NPC AI, world building) is captured in the knowledge graph and recalled during implementation.
Multi-Perspective Debates
RUMAD debates evaluate architecture tradeoffs — performance vs. flexibility, server authority vs. client prediction — before any code is written.
Research Pipeline
Sentinel monitors arXiv for relevant papers on NPC cognition, procedural generation, and networking. Findings auto-link to active development notes.
The Workflow
Watch a talk or tutorial → Cortex ingests it, extracts key patterns, and links them to your existing knowledge.
Ask a question mid-sprint → Cortex recalls relevant patterns from your notes, past decisions, and research.
Debate the approach → Multiple perspectives evaluate tradeoffs before any code is written.
Build with AI assistance → Your AI reads the decision context and helps implement it directly in the editor.
Retain what you learned → Spaced repetition ensures the team remembers patterns for the next system.
On the Roadmap
Live Editor Recall
Query the knowledge graph from inside the Unreal Editor without leaving the viewport.
Blueprint Diffing
Cortex tracks Blueprint changes over time and surfaces regressions or conflicts.
Team Graph Sync
Multiple developers share a unified knowledge graph with scoped permissions per discipline.
Build Pipeline Skill
Cortex monitors CI/CD builds, links failures to relevant architecture notes, and suggests fixes.
Universal Platform
One brain. Every surface.
Text Cortex from WhatsApp, query it in Slack, talk to it on the web — your knowledge follows you everywhere. Every Skill runs in an isolated container with scoped permissions, so your data never leaks.
WhatsApp
Slack
Discord
Documentation
Any docs, any platform
Research
Papers + citations
Custom APIs
Build your own
Access anywhere
Text, recall, or talk to your knowledge from any channel — web, mobile, WhatsApp, Slack, Discord, or voice. Same brain, every surface.
Sandboxed by default
Each Skill runs in an isolated Kubernetes pod with scoped permissions. No Skill can read another's data. Your knowledge graph stays yours.
One-click Skills
Install Skills from the marketplace in one click. No CLI, no config files, no deploy pipeline. Just activate and go.
Get started
Start building
with Cortex
Sign in with GitHub. Your knowledge graph is ready in seconds.
FAQ
One app for notes, flashcards, AI assistant, and task boards — all connected by a knowledge graph. Search anything you've ever learned, by meaning.
ChatGPT forgets everything between sessions. Cortex remembers. Every note, lecture, and video you save becomes permanently searchable, linked, and ranked. It's your knowledge, not a generic model.
Yes. The Student plan includes notes, flashcards, AI assistant with voice, kanban boards, video ingestion, and 50 MB of storage — no credit card required.
Upgrade to Pro for 5 GB, or add storage packs anytime. Your data is never deleted — you just can't add more until you upgrade.
Yes. Self-hosted option is always free. On our cloud, your data is isolated per account with GitHub OAuth and server-enforced re-authentication.
Yes. Boards lets you share individual task cards via link. Recipients can view and update without creating an account.