Communication
Best Email APIs in 2026
Email APIs let applications send email, handle incoming messages and get delivery notifications. This list helps developers and teams compare services before choosing an integration.
- 01
MailerSend MailerSend suits developers and teams integrating transactional email through an API or SMTP relay.
From $7/mo Free plan Web · iOS · API9.0 Visit Specs - 02
Mailjet It suits marketing teams creating campaigns and developers sending or processing email through APIs.
From $9/mo Free plan Web · API8.8 Visit Specs - 03 turboSMTP
turboSMTP suits website and app operators sending transactional email, as well as teams running newsletters or campaigns.
From €14.95/mo Free plan Web · Windows · macOS · Linux8.7 Visit Specs - 04
EmailEngine It suits CRM, SaaS, and AI businesses, as well as teams with data-residency needs or many mailboxes.
From $120.83/mo Free trial Web · Windows · macOS · Linux8.6 Visit Specs - 05
Hyvor Relay From €30/mo Free plan Web · API · Self-hosted8.6 Visit Specs - 06
Postmark Postmark suits developers sending transactional or broadcast email from applications through API or SMTP.
From $5/mo Free plan Web · API8.6 Visit Specs - 07
CloudMailin CloudMailin suits developers who need inbound email routed to an application and transactional email delivery through an API or SMTP relay.
From $25/mo Free plan Web · API8.4 Visit Specs - 08
MailKite Server Free plan Web · API · Self-hosted8.4 Visit Specs - 09
Maileroo Maileroo suits developers and scaling businesses sending transactional or marketing email through SMTP or an API.
From $10/mo Free plan Web · API8.3 Visit Specs - 10
Resend Broadcasts From $20/mo Free plan Web · API8.3 Visit Specs - 11
Mailazy From $49/mo Free plan Web · API8.2 Visit Specs - 12
Mailtrap Email Sending From $15/mo Free plan Web · API8.2 Visit Specs - 13
Twilio SendGrid It suits teams that need email delivery through an API or SMTP and want delivery activity tracking and email validation.
From $19.95/mo Free plan API8.2 Visit Specs - 14 MailPace From $10/mo Free plan Web · API8.1 Visit Specs
- 15
Elastic Email From $29/mo Free plan Web8.0 Visit Specs - 16
SocketLabs From $39.95/mo Free trial Web · API · Self-hosted8.0 Visit Specs - 17
e2a From $2/mo Web · API · Self-hosted7.9 Visit Specs - 18
SMTP2GO From $8.33/mo Free plan Web · API7.9 Visit Specs - 19
Amazon SES Free trial Web · API7.8 Visit Specs - 20
Emailit From $20/mo Web · API7.8 Visit Specs - 21
Posta Posta suits teams that want open-source email delivery on their own infrastructure.
Free plan Web · API · Self-hosted7.7 Visit Specs - 22
Netcore Email API Free plan API7.6 Visit Specs - 23
Plunk Free plan Web · API · Self-hosted7.6 Visit Specs - 24
Waypoint From $20/mo Free plan Web · API7.6 Visit Specs - 25 Brevo Transactional Email From $9/mo Free plan Web7.5 Visit Specs
Review needed platforms, then weigh free access, entry pricing, monthly volume caps, inbound handling, delivery webhooks, SMTP relay, templates and dedicated IP availability.