Summ (formerly Crypto Tax Calculator) vs ZenLedger Summ (formerly Crypto Tax Calculator) leads by 4 points.
Summ (formerly Crypto Tax Calculator) scores 4 points above ZenLedger, led by your tax form, cost-basis method, and complex transactions. Summ (formerly Crypto Tax Calculator) ranks #5 and ZenLedger #8 of 11 published tax software. Every term of the gap is on the ledger below; the inputs are on the audit receipt.
SUSumm (formerly Crypto Tax Calculator)77
vs
ZenLedger73
Scores are out of 100; published scores fall within 41–99 · ranks #5 and #8 of 11
Your tax form8/107/107.7+2.0for Summ (formerly Crypto Tax Calculator)+1.0 of 32
Cost-basis method8/106/106.2+3.2for Summ (formerly Crypto Tax Calculator)+1.7 of 32
Complex transactions9/107/105.3+2.7for Summ (formerly Crypto Tax Calculator)+1.4 of 32
Record portability4/107/104.8−3.7for ZenLedger−1.9 of 32
Net of the terms+4.2
Criteria roundingThe criteria block is rounded to whole points before it is spread−0.1
Reproduced gap+4.2
Published gapAfter score rounding and bounds — see the note below7773+4.0
Weight is in points of the 86-point weighted total. Points are score points of the gap between the two.
Summ (formerly Crypto Tax Calculator)Score 77Produces real IRS Form 8949 / Schedule D / Schedule 1 PDFs autofilled with the filer's SSN, publishes a per-jurisdiction binding-method table with a documented Rev. Proc. 2024-28 migration, and documents all six awkward cases with product mechanisms — then rents the whole record back to you, because the terms grant access 'only for the duration that you continue to pay' and the only documented backup route itself requires an active subscription.Strength: Awkward case treatment — 9/10Watch-out: Three compounding surprises, all landing after the card is charged. (1) YOUR REPORTS ARE RENTED — THOUGH YOUR DATA IS NOT DELETED. Terms clause 5.2: "For recurring services, we grant you and your Authorised Users a right to access the relevant Services only for the duration that you continue to pay for the Service, subject to these Terms." The cancellation article is blunter: "Once your subscription expires, you will lose access to any paid features, including tax reports." Read the whole article, though, because the same page also says: "The data and integrations you have imported are retained and can still be reviewed on the Accounts and Transactions pages unless a refund is issued, which may result in their deletion." So the history stays visible; what dies is the ability to REGENERATE the filed report and to EXPORT anything. The documented escape hatch does not survive either: "Currently, the only way to back up your data in Summ (formerly Crypto Tax Calculator) is by exporting your Transaction report. This ensures you have a copy of your raw data outside the platform.", which requires an active subscription ("An active subscription is required to download reports for all years.") and whose nine columns carry no cost basis. Stop paying in year three and the 2025 return you already filed cannot be regenerated to defend an audit — even though you can still look at the transactions behind it. (2) AT $49 AND $99 YOU CANNOT CHANGE THE INVENTORY METHOD. The pricing page, fetched 2026-09-29, no longer names inventory methods by tier (the features that start at Investor ($249) are "Tax minimisation algorithm", "Tax loss harvesting", "Advanced reports" and "Audit report"), but the vendor's own pricing help article states the gate: "Additionally, tools like the Tax Loss Harvesting Tool, advanced inventory methods, and advanced reports are only available on Investor and Trader Plans." The US default is Highest In First Out, so a US filer on Rookie or Hobbyist is locked into HIFO — a method that materially changes the tax owed — and the fix costs $200 more rather than a settings click. (3) UK FILERS WITH DEFI FACE A ONE-WAY DOOR: "Please note that, currently, the Bridge and Swap categories are not supported if you choose HM Revenue and Customs as your inventory method. If you use other inventory methods (e.g., First In First Out or Average Cost), you can use these categories but will not be able to switch back to HM Revenue and Customs." The method that actually binds under UK law is unavailable to anyone who has bridged or swapped, and leaving it is irreversible. Worse, the escape is paywalled: "In Summ (formerly Crypto Tax Calculator), we provide three inventory methods if your country setting is the UK. The HM Revenue and Customs method is available for all paid subscriptions. We also provide the First In First Out and Average Cost inventory methods for users on the Investor and Trader plans." — so a UK filer on Rookie ($49) or Hobbyist ($99) has HMRC as their only method and therefore cannot use the Bridge or Swap categories at all. Lesser but real: the pricing page, fetched 2026-09-29, no longer lists smart contract transactions by tier, but the vendor's help centre puts them above the $49 tier: "Certain features, such as smart contract transactions, require a subscription to the Hobbyist Plan or higher."ZenLedgerScore 73An unusually complete US form set — 8949, Schedule D, Schedule 1, Schedule C, FinCEN 114 and Form 8938 all named on served pages — plus a genuine second jurisdiction the prior pass missed entirely: a downloadable CRA Schedule 3 for Canada. What it is not is a filing kit, and ZenLedger says so itself: "We are not a full tax reporting software like TurboTax or TaxAct, so, you will need to combine what ZenLedger offers with a service like TurboTax or TaxAct to complete your tax return". Bolted onto a lot-matching layer that still defaults new accounts to HIFO; help articles dated 2026-08-29 and 2026-09-23 now document a shipped Rev. Proc. 2024-28 engine: By-Wallet tracking as the US default, allocation as of 1 January 2025 with two strategies, and a downloadable allocation report.Strength: Named form output — 7/10Watch-out: Four things a buyer only finds out after paying. (1) THERE IS NO FREE REPORT. The homepage (loaded 2026-08-19) says "Calculate your DeFi, NFT, & crypto taxes and generate free crypto tax reports.", "Industry-leading pricing with a free crypto tax software plan.", "Choose from our free crypto tax software or full-service plans to meet your needs." and buttons reading "Get Started for Free"; the pricing page's meta description still reads "ZenLedger pricing and cost breakdown. We have many competitively priced crypto tax software plans, including a free plan." — but the rendered pricing table has NO free tier and the word 'free' does not appear in its rendered body at all (Silver $49 is the floor). ZenLedger's own help centre states the real rule: "Creating an account is FREE. Use ZenLedger to import and aggregate your crypto transactions without paying a dime." followed immediately by "You only pay to view, download, and access tax reports each year." The free thing is data entry; every fileable artefact costs money. (2) THE 'ONE-TIME' PLAN AUTO-RENEWS. It is sold as a per-tax-year purchase ("Think of it as similar to TurboTax's business model") but: "When you sign up for ZenLedger and pay for your plan, we will automatically subscribe you to yearly auto-renewal of your subscription. This will automatically charge the card you paid with your first plan with towards the end of the calendar tax year for that next tax year. You will be notified via email 7 days prior to the renewal charge." (3) THE PRICING PAGE CARRIES THREE DIFFERENT REFUND WINDOWS. On one served page: "All plans offer a generous 1 year refund policy." (DIY header) and "All ZenLedger plans have a 14 day refund policy." (table footer) and "Tax Professional Prepared Plans have a 14-day refund policy." and "30 day money back guarantee" (the april filing product). Terms of Use §14 governs the software and says 14 days, adding: "If you request a refund after You downloaded any of the tax forms or CSV files, ZenLedger reserves the right to refuse your refund request or issue a partial refund." You cannot check whether the forms are right for you without forfeiting the refund right. The '1 year' line is not confined to the pricing page — it rides the global nav and is served on the Terms of Use page itself, directly above the clause that contradicts it. (4) IT IS NOT A FILING TOOL AND SAYS SO. The page that names the forms also says: "We are not a full tax reporting software like TurboTax or TaxAct, so, you will need to combine what ZenLedger offers with a service like TurboTax or TaxAct to complete your tax return (if you are filing without the services of a CPA). For more information on how to import your reports from ZenLedger into TurboTax (which we have direct integration with!) please review this article." — and the TurboTax walkthrough that sentence links to is HTTP 404.
Entry planSnapshothttps://summ.com/pricing — fetched 29 September 2026. A desktop User-Agent gets HTTP 403 (also in headless Chrome); an iPhone-Safari User-Agent over HTTP/1.1 gets HTTP 200, and https://summ.com/pricing/personal serves the same page. No currency code is printed; prices render with a bare "$" beside a country selector. Header: "Pay the lowest tax and get the most accurate reports with Summ (formerly Crypto Tax Calculator)." Four plans, each labelled "Annual subscription.": "Rookie" "$ 49" "100" "Transactions"; "Hobbyist" "$ 99" "1,000" "Transactions"; "Investor" "$ 249" "10,000" "Transactions"; "Trader" "$ 499" "100,000" "Transactions", with a slider to "500,000". Every plan lists "Unlimited tax reports for all tax years", "Crypto and stocks coverage" and "Dividend tracking"; "Tax minimisation algorithm", "Tax loss harvesting", "Advanced reports" and "Audit report" start at Investor; "Trading stock report" is on Trader. Above the ladder: "We support up to one million transactions and offer custom solutions for high-volume traders." FAQ: "Our subscription pricing is per year not tax year, so with an annual subscription you can calculate your crypto taxes as far back as 2013." | "Summ has an annual subscription which covers all previous tax years." | "For access to reports, the tax loss harvest tool or chat and priority support, you will need to upgrade to the appropriate paid plan." This is a recurring annual subscription covering all years, not a per-tax-year purchase; access ends when the subscription ends (https://help.summ.com/en/articles/6294285-cancellation-policy, fetched 2026-09-29: "Once your subscription expires, you will lose access to any paid features, including tax reports.").https://zenledger.io/pricing/ — fetched 29 September 2026, HTTP 200, plain curl (page JSON-LD dateModified 29 July 2025; content identical to 19 August 2026). <title> "Crypto Tax Software Plans"; the meta description still says "including a free plan" but no free tier is rendered. DIY cards: Silver "$49" "Per year" "100 transactions or less"; Gold "$199" "Per year" "5,000 transactions or less" "Most Popular"; Platinum "$399" "Per year" "15,000 transactions or less", with "Unlimited Transactions +$600" and "*Unlimited also includes 1 hr of live support"; then "Save 10% when you purchase multiple years!". Comparison table: "Annual Fee" $49 / $199 / $399; "Transactions" "Up to 100" / "Up to 5,000" / "Up to 15,000"; "All Detailed Reports" and "DeFi / Staking / NFTs" on all three. "All plans also include:" "Audit Report", "Tax Pro Access", "HIFO/FIFO/LIFO", "TurboTax Integration" among ten items. Add-on: "Personal product consulting available per request at $150/hr as an add-on." Human-assisted: "Premium Support Consultation- with a ZenLedger Enrolled Agent" "$ 275" "60 minute consultation"; "Tax Pro Prepared Plan - Single Year" "$ 3500" struck to "$ 2800" "Per year"; "Tax Pro Prepared Plan - Multi Year" "$ 6500" struck to "$ 5200" "Per two years"; "Packages are based on time required; prices are estimated. The actual cost for your tax return may be higher depending on your unique situation." Separate product "State & Federal Tax Filing" "$ 30" "per year", "30 day money back guarantee", "No subscription required". Continuity and refunds, same page: "All ZenLedger plans have a 14 day refund policy. Access the report forever, so you can always update or add transactions to your crypto tax reports." — while the nav block on the same page still says "All plans offer a generous 1 year refund policy." (contradiction unchanged since August). Billing count, from https://support.zenledger.io/en/articles/2615544-what-do-you-count-as-a-transaction-for-billing-purposes (fetched 29 September 2026): "Any buy, sell, and trade transaction is counted as a transaction in ZenLedger for billing purposes." Prices unchanged since 19 August 2026.
Asset coverageEditorial——
Region fitSnapshotglobalglobal
From the published criteria
Which should you pick?
SU
Summ (formerly Crypto Tax Calculator)
77#5 of 11
Leads
Pick it when
Pick Summ (formerly Crypto Tax Calculator) if your tax form matters most — it scores 8/10 to ZenLedger's 7/10 there (weight 32).
Strength
Awkward case treatment — 9/10
Tradeoff
Three compounding surprises, all landing after the card is charged. (1) YOUR REPORTS ARE RENTED — THOUGH YOUR DATA IS NOT DELETED. Terms clause 5.2: "For recurring services, we grant you and your Authorised Users a right to access the relevant Services only for the duration that you continue to pay for the Service, subject to these Terms." The cancellation article is blunter: "Once your subscription expires, you will lose access to any paid features, including tax reports." Read the whole article, though, because the same page also says: "The data and integrations you have imported are retained and can still be reviewed on the Accounts and Transactions pages unless a refund is issued, which may result in their deletion." So the history stays visible; what dies is the ability to REGENERATE the filed report and to EXPORT anything. The documented escape hatch does not survive either: "Currently, the only way to back up your data in Summ (formerly Crypto Tax Calculator) is by exporting your Transaction report. This ensures you have a copy of your raw data outside the platform.", which requires an active subscription ("An active subscription is required to download reports for all years.") and whose nine columns carry no cost basis. Stop paying in year three and the 2025 return you already filed cannot be regenerated to defend an audit — even though you can still look at the transactions behind it. (2) AT $49 AND $99 YOU CANNOT CHANGE THE INVENTORY METHOD. The pricing page, fetched 2026-09-29, no longer names inventory methods by tier (the features that start at Investor ($249) are "Tax minimisation algorithm", "Tax loss harvesting", "Advanced reports" and "Audit report"), but the vendor's own pricing help article states the gate: "Additionally, tools like the Tax Loss Harvesting Tool, advanced inventory methods, and advanced reports are only available on Investor and Trader Plans." The US default is Highest In First Out, so a US filer on Rookie or Hobbyist is locked into HIFO — a method that materially changes the tax owed — and the fix costs $200 more rather than a settings click. (3) UK FILERS WITH DEFI FACE A ONE-WAY DOOR: "Please note that, currently, the Bridge and Swap categories are not supported if you choose HM Revenue and Customs as your inventory method. If you use other inventory methods (e.g., First In First Out or Average Cost), you can use these categories but will not be able to switch back to HM Revenue and Customs." The method that actually binds under UK law is unavailable to anyone who has bridged or swapped, and leaving it is irreversible. Worse, the escape is paywalled: "In Summ (formerly Crypto Tax Calculator), we provide three inventory methods if your country setting is the UK. The HM Revenue and Customs method is available for all paid subscriptions. We also provide the First In First Out and Average Cost inventory methods for users on the Investor and Trader plans." — so a UK filer on Rookie ($49) or Hobbyist ($99) has HMRC as their only method and therefore cannot use the Bridge or Swap categories at all. Lesser but real: the pricing page, fetched 2026-09-29, no longer lists smart contract transactions by tier, but the vendor's help centre puts them above the $49 tier: "Certain features, such as smart contract transactions, require a subscription to the Hobbyist Plan or higher."
ZenLedger
73#8 of 11
Pick it when
Pick ZenLedger if record portability matters most — it scores 7/10 to Summ (formerly Crypto Tax Calculator)'s 4/10 there (weight 20).
Strength
Named form output — 7/10
Tradeoff
Four things a buyer only finds out after paying. (1) THERE IS NO FREE REPORT. The homepage (loaded 2026-08-19) says "Calculate your DeFi, NFT, & crypto taxes and generate free crypto tax reports.", "Industry-leading pricing with a free crypto tax software plan.", "Choose from our free crypto tax software or full-service plans to meet your needs." and buttons reading "Get Started for Free"; the pricing page's meta description still reads "ZenLedger pricing and cost breakdown. We have many competitively priced crypto tax software plans, including a free plan." — but the rendered pricing table has NO free tier and the word 'free' does not appear in its rendered body at all (Silver $49 is the floor). ZenLedger's own help centre states the real rule: "Creating an account is FREE. Use ZenLedger to import and aggregate your crypto transactions without paying a dime." followed immediately by "You only pay to view, download, and access tax reports each year." The free thing is data entry; every fileable artefact costs money. (2) THE 'ONE-TIME' PLAN AUTO-RENEWS. It is sold as a per-tax-year purchase ("Think of it as similar to TurboTax's business model") but: "When you sign up for ZenLedger and pay for your plan, we will automatically subscribe you to yearly auto-renewal of your subscription. This will automatically charge the card you paid with your first plan with towards the end of the calendar tax year for that next tax year. You will be notified via email 7 days prior to the renewal charge." (3) THE PRICING PAGE CARRIES THREE DIFFERENT REFUND WINDOWS. On one served page: "All plans offer a generous 1 year refund policy." (DIY header) and "All ZenLedger plans have a 14 day refund policy." (table footer) and "Tax Professional Prepared Plans have a 14-day refund policy." and "30 day money back guarantee" (the april filing product). Terms of Use §14 governs the software and says 14 days, adding: "If you request a refund after You downloaded any of the tax forms or CSV files, ZenLedger reserves the right to refuse your refund request or issue a partial refund." You cannot check whether the forms are right for you without forfeiting the refund right. The '1 year' line is not confined to the pricing page — it rides the global nav and is served on the Terms of Use page itself, directly above the clause that contradicts it. (4) IT IS NOT A FILING TOOL AND SAYS SO. The page that names the forms also says: "We are not a full tax reporting software like TurboTax or TaxAct, so, you will need to combine what ZenLedger offers with a service like TurboTax or TaxAct to complete your tax return (if you are filing without the services of a CPA). For more information on how to import your reports from ZenLedger into TurboTax (which we have direct integration with!) please review this article." — and the TurboTax walkthrough that sentence links to is HTTP 404.
Self-identify in 10 seconds
Which one is actually for you?
SUSumm (formerly Crypto Tax Calculator)Leads
Choose Summ (formerly Crypto Tax Calculator) if your tax form matters most
Your tax form: 8/10 against 7/10 for ZenLedger (weight 32)
Cost-basis method: 8/10 against 6/10 for ZenLedger (weight 26)
Complex transactions: 9/10 against 7/10 for ZenLedger (weight 22)
Summ (formerly Crypto Tax Calculator)Score 77Produces real IRS Form 8949 / Schedule D / Schedule 1 PDFs autofilled with the filer's SSN, publishes a per-jurisdiction binding-method table with a documented Rev. Proc. 2024-28 migration, and documents all six awkward cases with product mechanisms — then rents the whole record back to you, because the terms grant access 'only for the duration that you continue to pay' and the only documented backup route itself requires an active subscription.Strength: Awkward case treatment — 9/10Watch-out: Three compounding surprises, all landing after the card is charged. (1) YOUR REPORTS ARE RENTED — THOUGH YOUR DATA IS NOT DELETED. Terms clause 5.2: "For recurring services, we grant you and your Authorised Users a right to access the relevant Services only for the duration that you continue to pay for the Service, subject to these Terms." The cancellation article is blunter: "Once your subscription expires, you will lose access to any paid features, including tax reports." Read the whole article, though, because the same page also says: "The data and integrations you have imported are retained and can still be reviewed on the Accounts and Transactions pages unless a refund is issued, which may result in their deletion." So the history stays visible; what dies is the ability to REGENERATE the filed report and to EXPORT anything. The documented escape hatch does not survive either: "Currently, the only way to back up your data in Summ (formerly Crypto Tax Calculator) is by exporting your Transaction report. This ensures you have a copy of your raw data outside the platform.", which requires an active subscription ("An active subscription is required to download reports for all years.") and whose nine columns carry no cost basis. Stop paying in year three and the 2025 return you already filed cannot be regenerated to defend an audit — even though you can still look at the transactions behind it. (2) AT $49 AND $99 YOU CANNOT CHANGE THE INVENTORY METHOD. The pricing page, fetched 2026-09-29, no longer names inventory methods by tier (the features that start at Investor ($249) are "Tax minimisation algorithm", "Tax loss harvesting", "Advanced reports" and "Audit report"), but the vendor's own pricing help article states the gate: "Additionally, tools like the Tax Loss Harvesting Tool, advanced inventory methods, and advanced reports are only available on Investor and Trader Plans." The US default is Highest In First Out, so a US filer on Rookie or Hobbyist is locked into HIFO — a method that materially changes the tax owed — and the fix costs $200 more rather than a settings click. (3) UK FILERS WITH DEFI FACE A ONE-WAY DOOR: "Please note that, currently, the Bridge and Swap categories are not supported if you choose HM Revenue and Customs as your inventory method. If you use other inventory methods (e.g., First In First Out or Average Cost), you can use these categories but will not be able to switch back to HM Revenue and Customs." The method that actually binds under UK law is unavailable to anyone who has bridged or swapped, and leaving it is irreversible. Worse, the escape is paywalled: "In Summ (formerly Crypto Tax Calculator), we provide three inventory methods if your country setting is the UK. The HM Revenue and Customs method is available for all paid subscriptions. We also provide the First In First Out and Average Cost inventory methods for users on the Investor and Trader plans." — so a UK filer on Rookie ($49) or Hobbyist ($99) has HMRC as their only method and therefore cannot use the Bridge or Swap categories at all. Lesser but real: the pricing page, fetched 2026-09-29, no longer lists smart contract transactions by tier, but the vendor's help centre puts them above the $49 tier: "Certain features, such as smart contract transactions, require a subscription to the Hobbyist Plan or higher."
ZenLedger
Choose ZenLedger if record portability matters most
Record portability: 7/10 against 4/10 for Summ (formerly Crypto Tax Calculator) (weight 20)
ZenLedgerScore 73An unusually complete US form set — 8949, Schedule D, Schedule 1, Schedule C, FinCEN 114 and Form 8938 all named on served pages — plus a genuine second jurisdiction the prior pass missed entirely: a downloadable CRA Schedule 3 for Canada. What it is not is a filing kit, and ZenLedger says so itself: "We are not a full tax reporting software like TurboTax or TaxAct, so, you will need to combine what ZenLedger offers with a service like TurboTax or TaxAct to complete your tax return". Bolted onto a lot-matching layer that still defaults new accounts to HIFO; help articles dated 2026-08-29 and 2026-09-23 now document a shipped Rev. Proc. 2024-28 engine: By-Wallet tracking as the US default, allocation as of 1 January 2025 with two strategies, and a downloadable allocation report.Strength: Named form output — 7/10Watch-out: Four things a buyer only finds out after paying. (1) THERE IS NO FREE REPORT. The homepage (loaded 2026-08-19) says "Calculate your DeFi, NFT, & crypto taxes and generate free crypto tax reports.", "Industry-leading pricing with a free crypto tax software plan.", "Choose from our free crypto tax software or full-service plans to meet your needs." and buttons reading "Get Started for Free"; the pricing page's meta description still reads "ZenLedger pricing and cost breakdown. We have many competitively priced crypto tax software plans, including a free plan." — but the rendered pricing table has NO free tier and the word 'free' does not appear in its rendered body at all (Silver $49 is the floor). ZenLedger's own help centre states the real rule: "Creating an account is FREE. Use ZenLedger to import and aggregate your crypto transactions without paying a dime." followed immediately by "You only pay to view, download, and access tax reports each year." The free thing is data entry; every fileable artefact costs money. (2) THE 'ONE-TIME' PLAN AUTO-RENEWS. It is sold as a per-tax-year purchase ("Think of it as similar to TurboTax's business model") but: "When you sign up for ZenLedger and pay for your plan, we will automatically subscribe you to yearly auto-renewal of your subscription. This will automatically charge the card you paid with your first plan with towards the end of the calendar tax year for that next tax year. You will be notified via email 7 days prior to the renewal charge." (3) THE PRICING PAGE CARRIES THREE DIFFERENT REFUND WINDOWS. On one served page: "All plans offer a generous 1 year refund policy." (DIY header) and "All ZenLedger plans have a 14 day refund policy." (table footer) and "Tax Professional Prepared Plans have a 14-day refund policy." and "30 day money back guarantee" (the april filing product). Terms of Use §14 governs the software and says 14 days, adding: "If you request a refund after You downloaded any of the tax forms or CSV files, ZenLedger reserves the right to refuse your refund request or issue a partial refund." You cannot check whether the forms are right for you without forfeiting the refund right. The '1 year' line is not confined to the pricing page — it rides the global nav and is served on the Terms of Use page itself, directly above the clause that contradicts it. (4) IT IS NOT A FILING TOOL AND SAYS SO. The page that names the forms also says: "We are not a full tax reporting software like TurboTax or TaxAct, so, you will need to combine what ZenLedger offers with a service like TurboTax or TaxAct to complete your tax return (if you are filing without the services of a CPA). For more information on how to import your reports from ZenLedger into TurboTax (which we have direct integration with!) please review this article." — and the TurboTax walkthrough that sentence links to is HTTP 404.
Criterion by criterion
Scorecard
Published criteria · weight in points of 868 of 8 cells scored. Strength is read from the evidence file; the weight is the published one. Methodology
Your tax form
by 1 of 10weight 7.7 of 86Summ (formerly Crypto Tax Calculator) leads
Summ (formerly Crypto Tax Calculator)8/10 out of 10
ZenLedger7/10 out of 10
Cost-basis method
by 2 of 10weight 6.2 of 86Summ (formerly Crypto Tax Calculator) leads
Summ (formerly Crypto Tax Calculator)8/10 out of 10
ZenLedger6/10 out of 10
Complex transactions
by 2 of 10weight 5.3 of 86Summ (formerly Crypto Tax Calculator) leads
Summ (formerly Crypto Tax Calculator)9/10 out of 10
ZenLedger7/10 out of 10
Record portability
by 3 of 10weight 4.8 of 86ZenLedger leads
Summ (formerly Crypto Tax Calculator)4/10 out of 10
ZenLedger7/10 out of 10
Score dimensions
weights sum to 86
The published score is five dimensions, each weighted for the category. "Published criteria" is the criteria block above; the other four are the engine's own terms — availability, friction, trust record, measured data. Each bar is one side's points out of that dimension's maximum; the weight beside the name is its points of the 86-point weighted total. The published criteria above can fill 24 of the block’s 30. A weight marked “constant here” belongs to a dimension every ranked product in the category holds at the same value: it still counts in the total, and it orders nothing here.
Choose Summ (formerly Crypto Tax Calculator) unless the term ZenLedger leads on is the one you are buying.
Pick ZenLedger if record portability matters most — it scores 7/10 to Summ (formerly Crypto Tax Calculator)'s 4/10 there (weight 20).
The published order weighs every criterion the same way for everyone. To weigh them your way, run .
From the published order
Next best action
If this isn't your case
Other matchups worth comparing
How you can lose money here, and what the ranking scores
Regulatory failure: no licence where you are, or a forced market exit.
Scored by Which country's actual tax form comes out at the end — named, and for the year I am filing? · 32% (Summ (formerly Crypto Tax Calculator) 8/10, ZenLedger 7/10)
Exit failure: you cannot get out at par, on time, or with what is yours.
Scored by Can my accountant take this without redoing it — and if I stop paying, does my per-lot basis still leave with me? · 20% (Summ (formerly Crypto Tax Calculator) 4/10, ZenLedger 7/10)
Information failure: the number is wrong or bought, or your data leaks.
Scored by Which lot did it decide I sold, and does that method match what my tax authority actually requires? · 26% (Summ (formerly Crypto Tax Calculator) 8/10, ZenLedger 6/10)
Scored by My history has DeFi, staking, NFTs, a rug and ten transfers between my own wallets — what does it do with each one? · 22% (Summ (formerly Crypto Tax Calculator) 9/10, ZenLedger 7/10)
Every failure family that applies to this category is scored.
Questions
Frequently asked questions
Summ (formerly Crypto Tax Calculator) scores 4 points above ZenLedger, led by your tax form, cost-basis method, and complex transactions. Published scores, out of 100: Summ (formerly Crypto Tax Calculator) 77 (rank 5 of 11 tax software), ZenLedger 73 (rank 8 of 11).
Reviewed means both products compared here was read against its sources on or after that date; every ranked category is re-read at least every 45 days. Models research, extract and parse. A deterministic engine ranks. Every quote passes an adversarial refute pass.
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ZenLedger #8 of 1173