Best for individuals and small businesses (free when registering domains for two years).

1&1 IONOS is a European-oriented domain registrar providing many free add-ons and domain transfer and registration services.

All domains are provided with:

Wildcard SSL certificate to secure your website and improve your ranking in Google.
Professional email address with 2GB of mailbox space.
Up to 10,000 subdomains to bring your website to the look you want.

You can also migrate your existing domain name or email to 1&1 IONOS in three steps. You simply need to request an authorization code from your current provider, enter it into IONOS and confirm the migration using the link sent to your email address.
Benefits of 1&1 IONOS:

Provides a “Domain Lockdown” feature that protects your domain from being transferred by anyone who does not have that authority.
Customer service available 24/7.
One-click activation.

Cost:

Prices for some domains if registered for the first time and for one year:

.com – $0 per year (if registered for two years or longer).
.org – $1 per year.
.online – $0.80 per year.
.app – $12 per year.
.co – $8 per year.