Sharing money with someone shouldn't mean sharing a password.
Kiwi tracks your expenses and lets you split a budget with your partner or family in a shared book — each of you signs in with your own passkey, not a login you both know.
No passwords. No lock-in.
Kiwi is built solo by Tomás García Gobet. Sign-in runs on passkeys instead of a password Kiwi could ever leak, and every book's data is reachable through Kiwi's own API with your own key — never stuck behind the UI alone.
Everything a shared budget needs
Log an expense in seconds
Add a transaction, pick a category, done. Install Kiwi for one-tap access.
Pick your currency once
EUR, USD or ARS — set it per book and every chart and budget follows it.
Share a book, not a password
Invite your partner or family in. Everyone gets their own passkey to sign in.
See where it actually goes
Category breakdowns, spending patterns, budget usage and a year-in-review.
Recurring stays recurring
Rent, subscriptions, salary — set a rule once and Kiwi logs it every month.
Ask your AI assistant
Kiwi speaks MCP, so Claude or another AI assistant can answer questions about your spending.
Never locked in
Every transaction is reachable through Kiwi's own API with your own key — not stuck behind the UI alone.
Questions, answered
This is a real book, in daily use
Kiwi has been in active development since July 2024, and this is what a real month looks like — every transaction on this page is one I logged myself.
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