CryptoTaxCalculator (now Summ)
Depends
Confidence: Medium
Buy if you actively trade across exchanges and DeFi and need consolidated, multi-country tax reports.
New check
Comparison
CryptoTaxCalculator (now Summ) and CoinTracker both land on Depends.
Buy if you actively trade across exchanges and DeFi and need consolidated, multi-country tax reports.
Buy if you have multi-exchange or DeFi trades and need serious US crypto tax filing.
| Compare | ||
|---|---|---|
| Verdict | Depends | Depends |
| Best for | Active multi-exchange crypto traders | US crypto tax filers |
| Who it's not for | Buy-and-holders with a handful of trades | Buy-and-holders with few transactions |
| Privacy | No known public vulnerabilities found in the sources reviewed.12 | Repeat target: 2022 SendGrid email breach, Nov 2025 Mixpanel incident, alleged Dec 2025 2.7M-record leak. |
| Support quality | Official account actively answers users on Reddit. | Complaints about billing and support |
| Public sentiment | Users say it simplifies messy multi-exchange crypto taxes but report cost surprises, import errors, and frequent Koinly comparisons. | Users value the Coinbase integration and tax depth but frequently complain about pricing, errors, and support. |
| Biggest gotcha | Users report historic imports inflating balances . audit every import before filing.⁸ | Reviewers report calculation and sync errors; reconcile cost basis before filing |