How it works

Kaddu isn't just a voting tool: it's a trust toolkit for your communities. They all rest on the same principle — secrecy guaranteed by mathematics (Zama's FHE encryption), not by trust. No technical skills.

● 5 services online

Choose the tool that fits your need. Each takes a few minutes, free, no account to take part.

🗳️ Confidential voting

Decide together, in secret

Demo: create a vote, share, vote, result

1
Create the vote

A title, a question, choices. Kaddu gives you a link + a QR code.
2
Share on social media

Everyone opens the link, chooses and seals their ballot — encrypted instantly, invisible to all.
3
Close and reveal

The result is computed on the encrypted ballots then shown, verifiable by all.

Tip: generate a unique link per member so each votes only once.

Create a vote

🧾 Tamper-proof tontine

Save together, with no all-powerful manager

1
Create the tontine

The members, the amount per round, the order. Each member gets their private link.
2
Double validation each round

A payment only counts if the payer AND the beneficiary confirm. The manager can't falsify anything alone.
3
Tamper-proof ledger

Each operation is sealed in a chain of fingerprints: impossible to rewrite history. The money flows outside the app — Kaddu is only the referee.
4
Priority decided in secret

A member asks to go earlier? The others decide by an encrypted vote — only the total is revealed, never who voted what.

Open tontines

🔑 Sealed-bid tenders

Award without corruption

1
Create the tender

Two modes: sealed (amounts stay hidden until opening) or encrypted (blind auction).
2
Everyone submits their bid

The bid is sealed at submission: no one, not even the organizer, sees the prices before the time.
3
The winner, proven

In encrypted mode, the winner is computed on the encrypted bids: losers never reveal their price.

Open tenders

💡 Idea wall

Surface the best ideas

Anyone posts an idea for the community or for Kaddu. Members vote, and the best-rated rise to the top. Simple and transparent.

Open the idea wall

🌐 Public square

Discover and take part

Browse votes open to the public, take part and exchange with the Kaddu community.

See the public square

Why it's truly secret

Your data is encrypted and Kaddu computes on the encrypted data (counting votes, picking a winner…) thanks to Zama's FHE: the organizer only sees the final result, never an individual piece of data. For a guarantee where not even the operator can decrypt, the on-chain (fhEVM) version goes further.

Frequently asked questions

Can the organizer see my vote?

No. The ballot is encrypted on the spot; the organizer only sees the final result.

Does Kaddu touch the tontine money?

No. The money flows outside the app (mobile money, cash…). Kaddu is only the impartial referee and the tamper-proof ledger.

Do I need an account to take part?

No. A simple link is enough. The account is only for organizing (creating votes, managing a tontine, suggesting ideas).

Is it free?

Yes, entirely free.

➕ Open Kaddu See the community