Our take
Catax
Catax operates as a multi-jurisdictional crypto tax compliance and portfolio accounting platform designed to simplify transaction classification for digital asset market participants. The application connects directly to centralized trading desks, layer 1 blockchains, and decentralized finance protocols via read only Application Programming Interface keys and public ledger addresses. By indexing transfers, staking payouts, decentralized exchange swaps, and non-fungible token mints, the platform establishes historical cost basis ledgers across multiple regional accounting frameworks.
The service balances entry-level self-service filing tools with institutional forensic auditing workspaces. While active decentralized finance participants may need to review complex liquidity pool transactions manually, the engine handles standard spot trading, margin movements, and token transfers smoothly. For individual taxpayers and corporate finance teams seeking structured ledger reconciliation without handing over private key access, Catax delivers a solid, compliance-oriented utility.
relai
Relai positions itself as an accessible gateway for European residents seeking straightforward Bitcoin exposure with genuine self-custody from day one. The mobile platform bypasses traditional custodial holding balances, settling all completed purchases directly to private seed phrases generated on user devices. This architectural choice removes central counterparty custody risk while maintaining approachable workflows for scheduled dollar-cost averaging orders.
The service structure makes deliberate compromises. The platform focuses exclusively on Bitcoin, ignoring broader multi-asset ecosystems and smart contract protocols. Base transaction costs remain higher than wholesale order-book exchanges, though fee reductions apply to larger volumes and recurring plans. For cost-conscious savers who prioritize direct key ownership over complex trading tools, Relai provides a clear and focused entry path.