The verdict
For a small software team that sells globally and wants tax handled, I'd pick Paddle. It is aimed at SaaS and app companies, has a long list of billing tools and does not carry the open question about its future that Lemon Squeezy does.
If you sell licence keys, downloads or bundles as an indie developer or creator and want to start fast, Lemon Squeezy is a practical shortcut. Read the vendor's blog post on Stripe and its Managed Payments first, and ask support what changes for existing sellers. Both charge per sale with no monthly fee, so compare the total cost at your expected volume.