Email marketing may not be as trendy but it is still the best dollar-for-dollar investment for any marketing team.
From setting up and deploying campaigns, segmenting audiences, putting together templates, interpreting analytics, testing A/B variances and mapping out workflows.
ESPs I have worked with include:
Hubspot
Klaviyo
Mailchimp
Constant Contact
Luminate(Blackbaud)
Campaign Monitor
Active Campaign
Service does not include copywriting or designing creative assets like header images.