YNAB isn't too expensive though I don't like that they went to an annual subscription. It does sync with most accounts (I don't use that feature but it seems to work well for others, pretty sure the same syncing backend as Mint and others use). GnuCash can sync with some banks but I only had luck with one of mine, and never tried with other account types like investment and retirement accounts. If you're willing to d…
But if it didn't have the syncing feature, it would easily be one of the first subscriptions I would eliminate. Instead of being a chore I do once or twice a month, I instead check in on all my accounts for a couple minutes every morning and know exactly where my finances stand. It allows me to have multiple credit cards and bank accounts for various different situations and not have to worry. Budgeting only money in my accounts is such a better system than trying to guess how much money I think I might have later.
Accounts that do not work with it usually actually aren't worth using. My Apple card is a massive manual pain with YNAB, but with my other cards it is only ever worth using for interest free and 3% back on Apple purchases, which aren't that often.