The comparison articles all measure the same things: price per seat, integrations, whether it warms mailboxes for you. None of that decides whether the campaign works.
What decides it is upstream. Who is on the list. Whether the addresses are real. Whether the domains are yours and authenticated. Whether anyone is answering the replies the same day.
Pick something that sends reliably and stop thinking about it.
How we do it
The domains and the mailboxes are registered to your company and stay yours if we stop working together. The sending platform never holds your infrastructure.