If your team has multiple people touching TexturePacker → each needs a license or get a Company license. If it’s just a free hobby project → Free license is perfectly legal and sufficient.
Here is a detailed breakdown of the license tiers, hidden costs, and whether it is worth the investment. texturepacker license
For larger companies, a single license key can be purchased for multiple users. If your team has multiple people touching TexturePacker
CodeAndWeb occasionally grants free Pro licenses to individuals who contribute significantly to the game dev community. Defold now has TexturePacker support - Announcements texturepacker license