at.market - at.market has more than 1000 domain names where you can get the email you've always wanted.
Nuage - Nuage provides domain naming services.
aliveDomain - aliveDomain is a complete domain monitoring platform that tracks the expiry dates of domains and sends notifications through Zapier, Telegram, Slack, Discord, Webhook and Email.
Brandpa - Domain names for startups
Bye Bye Domain - Buy and sell domains before they expire
DomainWatch - Domain Monitoring Made Easy