Browser extension coming soon · Waitlist open

Right card. Right time.
Any AI.

Save the details that shape better answers as reusable cards. Attach only what matters in ChatGPT, Claude, or Gemini.

Free early access · No credit card

Your cards, at a glance

Ready

Work

Product design lead · Remote

Prefers concise briefs

Timezone: Tokyo (GMT+9)

3 saved detailsReady to attach
Ready

Health

Training for a half marathon

Vegetarian

Knee-friendly plans only

3 saved detailsReady to attach
Ready

Family

Planning life with two little ones

Weekend ideas

Budget-conscious picks

3 saved detailsReady to attach

Nothing shared until you attach

Coming to

ChatGPTClaudeGeminiPerplexityNext

See what the right context changes

Ask the same question twice—once without your card, once with it.

CardGo live demo

Demo responses use Claude. Your card and question are sent to Anthropic—don’t enter sensitive information.

Why CardGo

Better answers, with only the context you choose.

Choose what each chat knows

Attach only the card a conversation needs. Nothing else is shared.

Switch AIs without starting over

Bring the same context to ChatGPT, Claude, or Gemini. Perplexity is next.

See exactly what’s shared

Review and edit every card before you attach it. No hidden context.

Coming soon

Share one card—not your profile

Send a read-only card when it helps. You decide exactly what goes with it.

How it works

Attach once. Give the whole conversationthe right context.

Pick a card, review exactly what it contains, and remove it any time.

Choose your context card You control what’s shared

Work card

Attached to this chat

Active

Solo, pre-seed founder. Technical, ships solo. Prefers blunt feedback over encouragement.

Direct feedbackFounder context

This card stays attached to this conversation until you remove it.

Early access

Be first to try CardGo.

Join the waitlist, and we’ll email you when your early-access invite is ready.

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