Bookkeeping core
BuchhaltungsButler
The pages show EÜR and Bilanz modes, cost centres with project accounting, fixed-asset management and Kontenblätter and BWA/SuSa down to the cheapest tier, which is more than an income-and-expense list. But the only charts of accounts named are the association charts SKR42 and SKR49, and I found no public information on SKR03/SKR04, manual postings, journals, opening balances or a month-end close that locks the period.
sevDesk
Double-entry is claimed, with trial balance, cashbook and cost centres in the Pro tier — but the evidence never names SKR03/SKR04, journals, opening balances, or a month-end close that locks. That is roughly half of the 5-anchor bundle missing, so I interpolate to 4 rather than take 'einfache und doppelte Buchführung' on faith.