I have used digital ocean and vultr. From a technical review I used vultr and digital ocean differently. On vultr I ran some large Windows servers. For digital ocean I run all sorts of things.

In my experience, Digital Ocean's support is much much better than Vultr. Towards the end of my used of Vultr I had some pricing disputes for some IP address blocks.

On the other hand Digital Ocean gave me account credit when I reached out.

I can't speak for linode.