Cryptact is a cryptocurrency tax and profit-and-loss calculation service provided by pafin Inc. Users can upload transaction histories to automatically calculate gains and losses for tax filing, with support for 189 exchanges and blockchains and more than 33,935 digital assets. The service also offers integrations with Claude, ChatGPT, and other AI tools, enabling users to check results, edit transaction records, and perform calculations through chat or MCP and CLI connections. AI features are available on every plan, including Free, at no additional charge.

Cryptact incorporates Gtax, and former Gtax users can sign in with their existing email address and password. Eligible transaction data, calculation results, and subscription plans were transferred, allowing users to continue without a separate migration process. New users can start with an email address and a free account. The Free plan supports transaction imports and provides access to calculation results within specified limits, while paid plans are available for broader needs.