Ask HN: Alternatives for MailerLite

Hi, As MailerLite was recently compromised (likely all customer information stolen, API keys leaked and so on), what would be good alternatives in a cost-efficient mailing list and transaction email category? Preferably something where there are more security guarantees or even a self-hosting option. More info here: https://www.infostealers.com/article/mailerlite-hack-leads-to-massive-cryptocurrency-theft-an-exploit-or-an-infostealer-infection/