Key takeaways
- Best all-around tool for most investors. Koinly balances breadth, accuracy, and price better than anything else we test, which is why it is our default pick.
- Coverage is the standout. Hundreds of exchanges and wallets and a long list of blockchains import through API, read-only keys, public addresses, or CSV.
- Strong DeFi and NFT handling. Common swaps, liquidity, lending, staking, and NFT trades are labeled automatically, with manual tools for the edge cases.
- Clean outputs. Form 8949, Schedule D, an income report, and a TurboTax export come straight out of the reconciled data.
- Honest caveat. Missing basis on transfers and brand-new protocols still need review. At high complexity, a practitioner pass is worth it.
Koinly has become the tool most crypto investors reach for first, and after years of hands-on use across hundreds of client accounts, we agree with that instinct. It is the rare product that scales from a casual investor with two exchange logins up to an active DeFi user with dozens of wallets across a handful of chains, without forcing you to relearn the workflow as your activity grows. This review walks through what Koinly actually does, what it supports, how it is priced, where it shines, and the specific situations where you should still get a second set of eyes on the numbers before filing.
Two framing notes up front. First, these are practitioner opinions based on real use, not a paid placement. Features and pricing change often, so verify the current details on Koinly's own site before you buy. Second, software like Koinly is excellent at the mechanical work of importing and matching transactions, but it is not a judgment engine. When your activity gets genuinely complex, a practitioner-led service such as Count On Sheep is the escalation path that catches what automation cannot.
What Koinly does
Koinly is a crypto tax and portfolio tracking platform. You connect your exchanges and wallets, Koinly pulls in every transaction, it classifies each one (buy, sell, trade, transfer, income, fee), matches disposals to the right acquisition lots, and then produces tax reports you can file from or hand to a preparer. The portfolio side is free and useful on its own, showing holdings, unrealized gains, and an income view across all your connected sources. You only pay when you want to generate the tax report for a given year.
The reason it sits at the top of our list is that it does the boring parts well. Imports are reliable, the transaction matching is sensible by default, and the interface makes it easy to find and fix the handful of transactions that need attention. Many tools can produce a number. Koinly makes it straightforward to trust the number, because you can see how it got there.
Supported exchanges, wallets, and chains
Coverage is where Koinly earns its top spot. It connects to several hundred exchanges and wallet providers and supports a long list of blockchains, including the major EVM networks and many non-EVM chains. For most users this means every account you have is already supported, and you are mostly choosing the cleanest way to import each one.
| Source type | Coverage | How it imports |
|---|---|---|
| Centralized exchanges | Hundreds, including all the majors | API, read-only key, or CSV |
| Software and hardware wallets | Broad, via public address | Public address sync or CSV |
| EVM chains | Ethereum and major L2s and sidechains | Public address auto-sync |
| Non-EVM chains | Many, including major proof-of-stake networks | Public address or CSV |
| NFTs | Tracked on supported chains | Auto from address sync |
Import methods
Koinly gives you three reliable ways to get data in, and you can mix them per account.
- API or read-only key. For exchanges, a read-only API key lets Koinly sync your history and keep it current. Read-only keys cannot trade or withdraw, which is the safe default.
- Public address. For on-chain wallets, you paste a public address and Koinly reads the chain directly. Nothing custodial is shared, since a public address only exposes what the blockchain already shows everyone.
- CSV upload. For anything without an API, or for historical data an API will not reach, you upload the exchange's CSV export. Koinly maps common formats automatically.
In practice we lean on read-only keys for live exchange accounts and public-address sync for wallets, then fall back to CSV for older history. This combination tends to produce the most complete picture with the least manual cleanup.
Cost-basis methods and accuracy
Koinly supports the cost-basis methods that matter for accurate filing, including FIFO and HIFO, plus jurisdiction-specific methods for users outside the US. For US filers it can apply per-wallet basis tracking consistent with current IRS guidance, which became the expected approach under recent rules. The method you pick changes your reported gain, so this is a decision to make deliberately, ideally with your preparer, rather than leaving it on the default and hoping.
Where Koinly is genuinely strong is in surfacing the transactions that threaten accuracy: transfers that arrived without a known basis, negative balances that signal a missing import, and gains that look implausibly large because a buy never got recorded. It flags these clearly, so you fix the data rather than filing a number you cannot defend.
Form outputs and exports
Once your data is clean, Koinly produces the documents you actually file from.
| Output | What it is for |
|---|---|
| Form 8949 | Every disposal with dates, proceeds, basis, and gain or loss. |
| Schedule D | Short-term and long-term totals that flow to your return. |
| Income report | Staking, rewards, and other earned crypto at value when received. |
| TurboTax export | A file you import straight into TurboTax, plus support for other filing tools. |
| Full transaction CSV | The complete audit trail your preparer can verify line by line. |
DeFi and NFT coverage
This is the category where most tools struggle and where Koinly separates itself. Connect a wallet and Koinly reads the on-chain history, then labels the common DeFi actions: token swaps, adding and removing liquidity, lending and borrowing, and staking. It tracks NFT purchases and sales on supported chains as well. For the vast majority of DeFi users, the bulk of activity lands correctly with little manual work.
The honest limit is the frontier. A brand-new protocol, an unusual contract, or a niche chain can import as a generic transfer that Koinly does not yet recognize, which then needs a manual label so the gain or income is computed correctly. This is not a Koinly weakness so much as the reality of DeFi: the tooling always trails the newest protocols by some margin. Koinly's manual editing tools make these fixes about as painless as they get, but if a large share of your year is in cutting-edge DeFi, plan for a review pass.
Where Koinly breaks
No tool is flawless, and being honest about the limits is the point of a practitioner review. Koinly's weak spots are the same ones that challenge the whole category, and they are worth knowing before you rely on the output.
- Missing basis on transfers. If an account is not connected, coins arriving from it have no basis and gains inflate. The fix is completeness, not the tool.
- Very high wallet counts. Users with dozens of wallets across many chains will spend real time reconciling, and the odds of one unlabeled contract rise with volume.
- Bleeding-edge protocols. The newest DeFi can import as generic transfers until support catches up, requiring manual labels.
- Judgment calls. Software cannot decide ambiguous treatment for you, like whether a particular reward is income now or later. That is where a preparer earns their keep.
Security and privacy
Security is a reasonable concern any time you connect financial accounts, and Koinly's model is built around minimizing risk. Exchange connections use read-only API keys, which cannot place trades or move funds, so even if a key were exposed it could not be used to drain an account. Wallet connections rely on public addresses only, which expose nothing the blockchain does not already make public. You never share private keys, seed phrases, or withdrawal-capable credentials. That said, sensible hygiene still applies: create keys with the narrowest permissions the exchange allows, label them so you can revoke a specific one later, and remove any key you no longer need. Treat your Koinly account itself like any financial login, with a strong unique password and two-factor authentication enabled. None of this is unique to Koinly, but it follows the practice we recommend to every client, and Koinly's read-only-first design makes it straightforward to follow.
Customer support
Koinly's help center is thorough, with step-by-step guides for connecting most exchanges and wallets, and email support handles account-specific questions. It is solid for a self-serve product. What it is not, and does not claim to be, is tax advice. If your question is "is this taxable and how," that is a question for a practitioner, not a support ticket. We see this distinction trip up users who expect a support agent to make a treatment call; the right move is to use support for how the tool works and a preparer for what the law requires.
How Koinly earned the top spot
Koinly did not reach the top of our list by accident. Over several tax seasons we have watched it widen its lead on the two things that decide most crypto returns: the number of sources it can import cleanly, and the share of on-chain activity it labels without help. Each year the chain list grows and the protocol recognition deepens, which steadily shrinks the manual cleanup that used to dominate a DeFi-heavy return. Just as important, the team has kept the interface from bloating as features piled on, so the tool that handles a casual investor's three trades is the same tool that handles a power user's thousands, with no relearning in between. That combination of expanding capability and steady usability is rare, and it is the practical reason we reach for Koinly first.
Pricing
Koinly's portfolio tracking is free. You pay only to generate a tax report for a given year, and pricing scales with how many transactions you had that year. Typical tiers run from a modest plan for low-volume users up through plans built for tens of thousands of transactions, commonly in the range of roughly $49 to $279 per tax year. For the coverage and accuracy you get, this is strong value, and you can do all the import and reconciliation work for free first, then only pay once you are ready to download the report. Pricing and tier limits change, so verify current pricing with Koinly before buying.
Koinly producing numbers you are not sure you can defend?
That usually means a data gap or a judgment call, not a software flaw. We reconcile the full picture and hand your preparer figures that hold up.
See how it worksWho should use Koinly
Koinly is the right default for the broadest range of crypto investors. If you have a few exchange accounts and a wallet or two, it is more than enough and easy to learn. If you are an active multi-chain DeFi user, its coverage and labeling will save you the most time of any tool we test. It is genuinely hard to find a profile that Koinly does not serve well.
The exceptions are at the extremes: if you have an unusually large number of wallets, lean heavily on brand-new protocols, or face genuinely ambiguous treatment questions, you will still want a practitioner to review the final numbers. That is not a knock on Koinly. It is the line between data processing, which software does brilliantly, and tax judgment, which it does not.
For a straightforward account, the whole process is comfortably under an hour. The variable step is review: the more DeFi and the more wallets, the more time you spend labeling, which is exactly where a practitioner can take it off your plate.
When you outgrow the software
Koinly is the best starting point we know of, and for many people it is also the finish line. But software has a ceiling. When you have years of mixed history, dozens of wallets, missing basis on transfers, or treatment questions that do not have a tidy answer, you have outgrown the self-serve tier. That is the moment to bring in a practitioner-led service. Count On Sheep reconciles your full crypto history, recovers the cost basis the platforms drop, and hands your preparer CPA-ready figures. We work alongside Koinly, not against it. The tool does the import, we handle the judgment.
See how Count On Sheep handles complex crypto taxes →