[solardev]

It really depends on your needs, volume, and budget. Mailchimp is probably the "default" option, but there's also ConstantContact, ActiveCampaign, HubSpot, etc.

It's also a question of what other services you might need to integrate into (your CRM or sales funnel or analytics or whatever).

[santy-gegen]

thanks for this great info! it seems like mailchimp is the plain vanilla version. i learnt sth today :)