Summ (Crypto Tax Calculator)
“Can a crypto-native tax calculator become the sub-ledger that connects on-chain activity to mainstream accounting systems for individuals, accountants, and businesses?”
Founded2018
HQSurry Hills, New South Wales, Australia
FoundersShane Brunette, Tim Brunette
Total raisedSeed round (2022, undisclosed)
Latest roundSeed, 2022
IndustryVertical SaaS / Crypto Tax
The story
Founded 2018 in Sydney as Crypto Tax Calculator, differentiated by focusing on DeFi/decentralized-exchange tax reporting rather than only centralized exchange trades. Expanded to the US in 2022 and secured embedded-partner status with MetaMask and Coinbase. Rebranded in 2025 to Summ (CTC Ledger) as it pushed into business/accountant workflows with QuickBooks and Xero integrations, positioning itself as a crypto sub-ledger for businesses rather than only a consumer tax tool.
Product timeline
2018
Founded by brothers Shane and Tim Brunette in Sydney as Crypto Tax Calculator, focused on DeFi/decentralized exchange tax reporting.· pivot
2022
Raised seed capital to expand into the US market.· banking
2024
Selected by MetaMask as embedded crypto tax partner.· pivot
2025
Coinbase partnership announced; supports IRS Form 1099-DA.· pivot
2025
Rebranded from Crypto Tax Calculator to Summ (CTC Ledger).· pivot
The stack
2 layers disclosed in Summ (Crypto Tax Calculator)’s embedded-finance stack
Payments / PSP
Accounting
in the full report
Accounting gap: none
3 more providers across 1 layer, with confidence-scored evidence and source URLs, are in the Embedded Finance Index report.