Twilio SendGrid
twilio.comEmail API and SMTP delivery with grouped unsubscribe management
Email API and SMTP delivery with grouped unsubscribe management
Connect on-site signup widgets with contact segments and email workflows
Multi-account email marketing with shared designs and separate campaign data
Email campaign production with approved versions, branded layouts and shared sending capacity
Customer email flows that respond to signups and product activity
Scheduled email campaigns with reusable suppression filters
Email campaigns, automations and transactional templates billed by sends
Email campaign operations across connected relays and delivery providers
Store email journeys with customer filters and product recommendations
Email automation using layered customer profiles, decision points, and connected data
Transactional email with domain-level suppression controls and activity logs
Email delivery and stream-level monitoring for teams managing multiple senders
Content-to-newsletter automation that builds issues inside an existing email platform
Multi-brand email management with separate lists, users and unsubscribe pages
Email verification with separate delivery status, reason and domain or account flags
Team email design with restricted layout editing and a separate approval interface
Email delivery and campaign software with list-specific or global suppression scope
Venue email automation with POS-connected birthday offers and recurring campaign options
Application email delivery and isolated sandboxes for inspecting test messages
Email verification with a credit balance shared across checks and inbox reports
SMTP and API email with independently configured application streams
Email-list validation with detailed status and sub-status classifications
Ecommerce email workflows combining store data, SMS and push
Triggered email journeys with forms and flexible sending credits