Product · 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 | Call, hold, correct persist | Win |
| Should I send this? | Guesses from the thread | Refuse or clear with a why | Win |
| Mail + calendar + chat together | Manual paste each time | One curated signature | Win |
Skeptic: I will write a great system prompt.
Prompts do not refuse with a why across app switches, do not suppress what should stay quiet, and do not deepen a signature you own.
vs. ChatGPT / Claude memory
| Scenario | Them | Cosmos | Verdict |
|---|---|---|---|
| Preferences in one chat product | Good | Good via MCP in same product | Parity |
| Judgment across Cursor, Claude, and web | Siloed per vendor | One signature, any MCP client | Win |
| Inspect and correct a decision | Limited visibility | Receipts, dismiss or edit | Win |
| Export and leave vendor | Weak or locked | .polarity export | Win |
| Refuse with a why | Not a product surface | Core call return | Win |
Skeptic: ChatGPT already remembers me.
Inside one assistant. Cosmos is the judgment every agent calls, and you own it.
vs. Rewind / Limitless
| Scenario | Them | Cosmos | Verdict |
|---|---|---|---|
| What did I do Tuesday? | Strong search | Connectors + query | Parity |
| Should the agent act on this? | Not the job | Recommend, refuse, escalate | Win |
| Agent ground in Cursor | Not primary | MCP native | Win |
Skeptic: Rewind already records my life.
Recording is not judgment. Cosmos proposes moments; you decide what clears the bar; agents call that curated ground.
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 suppress and refuse | None | Judgment call before action | Win |
Skeptic: I already store everything.
Stores restuff what you bothered to write. Cosmos is live attention orchestration: hold, suppress, refuse, with receipts.