Scope and selection
The initial library covers Coinbase Advanced, Kraken Pro, and Gemini ActiveTrader as a bounded set of spot-trading interfaces with publicly accessible documentation. Inclusion is not an endorsement or a claim that this is the complete market. Scores compare documentation within this small reviewed set. We do not compare derivatives, leveraged products, staking yields, or simple-buy services.
How we verify facts
- Read official help pages, fee schedules, product documentation, and relevant availability notices.
- Record the product, schedule section, scope, source URL, and actual check date.
- Link each comparison-table claim to its supporting document. Distinguish published facts from our interpretation.
- Label information requiring a signed-in account as unknown. Do not replace missing information with a competitor’s rate or an older third-party estimate.
Fees are snapshots
Published base tiers are not personalized quotes. Arithmetic examples assume one standard spot trade at the stated tier and role. They exclude all other costs. Readers must check the current schedule and order preview. Verification dates do not update automatically when the website is built.
Regional scope
These pages are not a global eligibility directory. Providers can restrict countries, states, entities, assets, payment methods, and features independently. Where a source contains a specific closure notice alongside an older country listing, we surface the notice rather than assuming the listing establishes availability.
Transparent documentation ratings
Each review has three equally weighted criteria, scored 0–2, for a maximum of 6. The total is a simple sum with no hidden weighting. Ties are retained; we do not break them to manufacture a winner. These are editorial judgments about the cited documents, not user reviews.
- Fee transparency: 2 = public numerical standard spot rates and tier thresholds; 1 = public mechanics with rates requiring sign-in; 0 = neither verified.
- Order explanations: 2 = a cited guide explains market and limit execution behavior; 1 = a cited product page lists order capabilities without those explanations; 0 = neither verified.
- Eligibility information: 2 = jurisdiction-specific restrictions or a route to current regional pairs; 1 = a generic availability statement; 0 = neither verified.
A zero means evidence was not verified, not that a feature is absent. Unavailable or conflicting evidence is identified in the review and rechecked before rescoring. Each criterion links to the source used. Scores are dated snapshots and may change as documentation changes. A 6/6 does not measure safety or make an exchange the best choice.
What we have not tested
We have not funded test accounts, placed orders, audited custody, or tested support. Provider statements do not establish solvency or safety. Solvency, execution quality, custody controls, and support are unrated. We do not publish customer star ratings or aggregate-rating structured data.
Updates and corrections
When a material discrepancy is identified, recheck the official source, revise the affected claim, and update its verification record. Unresolved claims should be labeled or removed. GitHub history records changes; a source-check date means the documents were read on that date, not continuously monitored.
Commercial relationships
There are no affiliate links, paid rankings, or sponsored placements in this library. Reference links carry no referral codes. Read the disclosure.