This feels like an AI-generated list of products with no actual hands-on time to let me get a feel if any of the services actually work vs their feature list. Revising the language/structure to not reek of AI would make me think more care had gone into it, and thus be more trustworthy.
It's also Alcatrazsec, a company we had never heard of, listing its own product as the best of the list, whilst naming it as if it wasn't their own product.
Did not get you properly? If you mean automating or scheduling email for a future date/time and auto-responding incomming emails, Gmail already have these features
Find everyone who upvoted this early and you can probably identify an HN upvoting ring.
Hence the term "dead man's switch"