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rp2
Privacy-focused, free, open-source cryptocurrency tax calculator for multiple countries: it handles multiple coins/exchanges and computes long/short-term capital gains, cost bases, in/out lot relationships/fractioning, and account balances. It supports FIFO, LIFO, HIFO and it outputs in form 8949 format. It has a programmable plugin architecture
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I recommend using RP2: it's privacy-focused, open-source, free and non commercial. It computes taxes using FIFO, LIFO or HIFO and it generates comprehensive outputs, which include year-end balances, gain-loss summary and much more. It also has [transparent computation](https://github.com/eprbell/rp2/blob/main/docs/user\_faq.md#how-to-verify-that-tax-computation-is-correct) to let users verify result correctness. It's on Github: https://github.com/eprbell/rp2/