About dekla

dekla is a privacy-first Swiss tax assistant. In default mode the app sends no data over the network after loading — verifiable in your browser's network tab and via our public test.

Every calculation runs locally. Your data is encrypted on your device with XChaCha20-Poly1305 + Argon2id.

Evidence

• Privacy policy (Art. 19 revFADP)
• Terms of service
• Security + bug bounty
• For tax professionals: become an expert
• Imprint
• Open source (AGPL-3.0)