AI research by Polarity Lab
Pressure tests
Fair opponents only. We compare against thread plus prompt, vendor memory, capture tools, and notes apps.
vs. Thread + prompt
| Scenario | Them | Cosmos | Verdict |
|---|---|---|---|
| One hard question, no history | Strong with a good prompt | Little added value | Parity |
| Sixth session on the same goal | Context rot, re-explaining | Path, capture, recall persist | Win |
| What am I forgetting? | Cannot know | Recall due from graph | Win |
| Mail + calendar + chat together | Manual paste each time | Connectors, one graph | Win |
Skeptic: I will write a great system prompt.
Prompts do not survive app switches, do not schedule your forget curve, and do not show drift with receipts weeks later.
vs. ChatGPT / Claude memory
| Scenario | Them | Cosmos | Verdict |
|---|---|---|---|
| Preferences in one chat product | Good | Good via MCP in same product | Parity |
| Memory across Cursor, Claude, and web | Siloed per vendor | One account graph, any MCP client | Win |
| Inspect and correct a memory | Limited visibility | Provenance on nodes, dismiss or edit | Win |
| Export and leave vendor | Weak or locked | .polarity export | Win |
| Drift readout | Not a product surface | Core /me loop | Win |
Skeptic: ChatGPT already remembers me.
Inside one assistant. Cosmos is the map every agent reads, and you own it.
vs. Rewind / Limitless
| Scenario | Them | Cosmos | Verdict |
|---|---|---|---|
| What did I do Tuesday? | Strong search | Connectors + query | Parity |
| Am I living the life I meant? | Not the job | Drift + path | Win |
| Agent ground in Cursor | Not primary | MCP native | Win |
Skeptic: Rewind already records my life.
Recording is not authorship. Cosmos proposes moments; you decide what counts, then measures alignment to path.
vs. Notion / Obsidian
| Scenario | Them | Cosmos | Verdict |
|---|---|---|---|
| Store what you wrote | Excellent | Capture + chronicle | Parity |
| Read what you did not write | Manual | Connectors with consent | Win |
| Automatic drift detection | None | Heading vs. connectors | Win |
Skeptic: I already have a second brain.
Second brains store what you bothered to write. Cosmos reads across life surfaces and shows when behavior diverges from heading.