CryptoTaxCalculator (Summ) vs. Koinly

Compare two of the leading crypto tax software providers: Koinly and Summ (formerly CryptoTaxCalculator), and see which could help you track your portfolio and calculate your taxes.

Looking for a crypto tax calculator with all the features and support you need? Our guide breaks down the key differences between two of the leading tools so you can easily pick which is right for you.

Integrations

Your crypto tax tool needs to support everything you use, and, on the surface, the two platforms look comparable, with 1,000+ integrations supported by each.

However, Summ's claim of 3,500 integrations is misleading as the majority of these are DeFi protocols, already covered by standard blockchain integrations. For example, Uniswap is accessed through an Ethereum integration. In practice, this level of DeFi coverage is standard across most of the leading crypto tax tools.

Koinly also supports 7,000+ DeFi protocols across 80+ smart contract blockchains, but unlike Summ, it does not lock smart contract or automated on-chain transactions behind a $129/year (AUD) paywall. All users have free access to all features (excluding downloading a report) for up to 10,000 transactions.

Portfolio tracking

Both Koinly and Summ function as free crypto portfolio trackers, with dashboards that let you monitor performance at both a high level and per asset. This includes unrealized gains and losses, real-time market data, ROI, and more.

Koinly provides slightly richer asset-level detail, such as market cap, rank, and cost per unit. It also includes more dedicated dashboards, including an NFT dashboard and an asset maturity tax dashboard, as well as a free tax optimization tool.

DeFi, NFTs, margin trading, and derivatives

Both Koinly and Summ support a wide range of transaction types, from common activities like airdrops, NFTs, and mining or staking rewards to more complex on-chain transactions.

As with all crypto tax tools, investors with advanced activity, such as layer 2 transfers, liquid staking, cross-chain bridges, or experimental DeFi protocols, should expect some level of manual review and reconciliation, regardless of the platform used. It generally comes down to the UX in terms of how easily this information can be reconciled and edited.

The key difference between the two comes down to access and pricing. With Koinly, support for complex transactions is included as standard, whether you’re on the free plan or a paid plan. Summ restricts smart contract and automated on-chain transaction support to its $129/year plan.

Koinly also offers stronger NFT support, with a dedicated NFT dashboard that lets users manage NFT activity in one place and view cost basis and unrealized gains or losses. While Summ supports NFTs, currently, there's no comparable NFT dashboard.

Free plan

Both Koinly and Summ offer a free plan, allowing users to try the platform before committing. The difference lies in what’s actually available without upgrading.

With Summ, many core features are locked behind higher-tier plans. Support for smart contracts and automated on-chain transactions requires at least the Hobbyist plan (from $129 AUD), while features such as tax loss harvesting dashboards and flexible cost-basis methods are only available on the Investor plan (from $249).

Koinly includes all features on its free plan, including a free tax loss harvesting tool and the ability to preview your full tax summary before purchasing a plan.

Paid plans

Paid plan tiers for Koinly and Summ are comparable, starting at $49 for 100 transactions and scaling up to plans for 1,000 and 10,000 transactions. A key difference is that many users complain that their subscription with Summ is auto-renewed each year, often without warning. Meanwhile, Koinly lets you decide whether you want to renew your subscription each year.

Usability and features

Crypto taxes are complex enough, so usability matters. Both Koinly and Summ are easy to use, with automatic imports via API and tools to tag and categorize transactions.

Where Koinly has an advantage is in how issues are surfaced and resolved. Both platforms include automatic error detection, but Koinly provides clearer flags at the wallet and transaction level, along with contextual help that explains how to fix issues step by step. As well as this, Koinly offers more flexibility when editing transactions, which can be especially useful for complex DeFi activity where automated categorization isn’t always perfect.

Customer support

Both Koinly and Summ offer excellent customer support, with an average 4.6-star rating on Trustpilot.

One of the highlights of Koinly's customer support includes the expert review service. With this service, one of Koinly’s experts will go through all of your transactions with a fine-tooth comb to ensure everything is as it should be, so you can file with confidence knowing your calculations are correct.

Reputation and security

Both platforms have established strong industry credibility. Summ is backed by Coinbase Ventures and works with a number of established crypto accounting firms. Koinly has partnered with a wide range of crypto businesses, including major exchanges and wallets such as Binance, CoinSpot, and MetaMask, as well as newer projects like Loopring and Radix, and tax and accounting firms worldwide, including TaxScouts, Clear Tax, and Wealthsimple.

On security, both platforms take data protection seriously. Koinly is SOC 2 and ISO 27001 certified and has not experienced any data breaches to date. Summ is also SOC 2 certified, but previously suffered a data breach caused by unauthorized third-party access. The exposed data included user IDs, email addresses, password hashes, public wallet addresses, and exchange names.

Supported countries 

Both Koinly and Summ support US and Australian investors, offering IRS Form 8949, Schedule D, TurboTax-compatible reports, and dedicated ATO myTax reports.

Outside the US and Australia, Koinly offers far broader international support, with country-specific reports for the UK and several European countries, plus a Complete Tax Report for filing elsewhere. Summ provides fewer international reports, with some only available on higher-tier plans.

Conclusion: Which is best?

While both tools will get the job done, overall, Koinly offers more for less, with more features available to users whether they’re paying or not, and it's better at categorizing transactions and guiding users through any manual reconciliation needed for more complex DeFi transactions. While we might be a little biased, we think our product speaks for itself, and we'll keep working to keep it that way.