The verdict
If you sell software or digital downloads to customers in many countries and do not want to run tax yourself, I'd pick Lemon Squeezy. If you run a Dutch or Belgian business with client invoices, expenses and a VAT return to file, I'd pick Moneybird.
Many small companies need both. In that case, think about how the sales reach your books. Because Lemon Squeezy is the seller of record, check how its invoices, refunds and payouts show up in your bookkeeping before you commit. Also read what Stripe's ownership means for the product.