Shipday. It’s not free, but it works. They are partnered with many other delivery services too.
I second this!
I was informed by DoorDash’s developer support desk on 7/8/25 that DoorDash is no longer onboarding new customers onto this plugin. It took me 4 months of daily phone calls & emails to get that definitive answer from them. My company had even contracted a developer to install this plugin on our website before being told that we could not onboard, so that was money wasted.
DoorDash went as far as recommending a completely different delivery plugin. My guess is that they are phasing out this plugin and relying on 3rd parties to partner with them for delivery services via WooCommerce.