💰Free ISBNs are assigned by print on demand companies, while paid ISBNs are purchased and owned privately
📚Free ISBNs can only be used with the specific print on demand company that assigns them
📖Paid ISBNs allow you to list yourself or your publishing company as the publisher
🔀Using different free ISBNs for different print on demand companies may result in multiple listings for your book
💡Consider your goals, budget, and future publishing plans when deciding between free and paid ISBNs