Minimum price per 1k emails at basic tariffs / custom tariffs
UNIONE
$0.22 / $0.07
Mailgun
$0.5 / $0.08
Sendgrid
$0.5 / $0.17
Mailchimp Transactional
$0.4 + minimum $20/month for 500 contacts Standard plan
Customer support
UNIONE
24/7 in live chat and via email for everybody, on all pricing plans
Mailgun
Support tickets (response time about 24 hours), Chat between 7am to 7pm...
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Sendgrid
Ticket support 24/7 (for logged in users only), chat support 24/7 (for paying...
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Mailchimp Transactional
24/7 email & chat support at paid "Standard" plans only, or Email support for first 30 days
Transactional and bulk emails via SMTP and REST API
UNIONE
Yes
Mailgun
Yes
Sendgrid
Yes
Mailchimp Transactional
Yes
Independent tags for statistics
UNIONE
up to 4 per email, up to 10000 per project + filtering through several categories
Mailgun
up to 3 per email, up to 5000 per domain + filtering through 1 category only
Sendgrid
up to 10 per email, up to 100 per domain (recommended) + filtering through 1 category only
Mailchimp Transactional
up to 100 per email, up to 1000 per account
Custom tracking domain and unsubscribe link
UNIONE
Yes
Mailgun
Partially
Sendgrid
Partially
Mailchimp Transactional
Yes
White Label
UNIONE
Yes
Mailgun
Yes
Sendgrid
No
Mailchimp Transactional
No
Customer support
UNIONE
24/7 in live chat and via email for everybody, on all pricing plans
Mailgun
Support tickets (response time about 24 hours), Chat between 7am to 7pm CST, Monday to Friday (for pricing plans starting at $80), Phone between 8am to 5 pm CST, Monday to Friday (for pricing plans starting at $90)
Customer support
UNIONE
24/7 in live chat and via email for everybody, on all pricing plans
Sendgrid
Ticket support 24/7 (for logged in users only), chat support 24/7 (for paying customers), callback between 7AM to 5PM MT (for Pro or higher accounts)