18.2
turboSMTP is a cloud SMTP service for sending email messages and newsletters, with statistical analysis for individual and aggregate messages.
Free planAndroidiOSWeb
Best Email APIs in 2026
Email APIs let an app send messages, accept inbound email and receive delivery updates through code. They can also provide SMTP relay and templates for common mail flows. Compare free plans, paid starting prices and monthly send limits. Check inbound email, delivery event webhooks, SMTP relay, templates and dedicated IP options.
27.8
MailerSend delivers transactional email through an email API and SMTP relay.
Free planiOSWebAPI
37.6
Postmark delivers and tracks application email as an alternative to SMTP or Sendmail.
Free planWebAPI
- 4
Mailjet
Mailjet is an email marketing and API platform for creating, sending and automating marketing and transactional messages.
Free planWebAPI7.5From $9 a month - 5
Twilio SendGrid
Twilio SendGrid Email API is a cloud-based email delivery service for sending messages without maintaining customer-owned email servers.
Free planAPI7.2From $19.95 a month - 6
Resend Broadcasts
Resend Broadcasts lets users send email campaigns to existing contacts through a visual editor or API.
Free planWebAPI7.1From $20 a month - 7
Hyvor Relay
Hyvor Relay is an email API for developers that can be used through its hosted service or self-hosted.
Free planWebAPISelf-hosted6.9From €30 a month - 8
Maileroo
Maileroo provides SMTP relay and Email API services for transactional and marketing email, with inbound routing and email testing tools.
Free planWebAPI6.9From $10 a month - 9
SMTP2GO
SMTP2GO provides SMTP and API email delivery for businesses and individual senders, with real-time reporting on deliveries, bounces, opens, clicks,…
Free planWebAPI6.9From $100 a year - 10
Waypoint
Waypoint is an email API for engineers paired with a visual template builder for product teams.
Free planWebAPI6.9From $20 a month - 11
CloudMailin
CloudMailin receives inbound email and delivers it to web applications through an HTTP POST webhook.
Free planWebAPI6.8From $25 a month - 12
e2a
Free planWebAPISelf-hosted6.7From $10 a month - 13
EmailEngine
EmailEngine is a self-hosted email API by Postal Systems OÜ in Tallinn, Estonia.
WebAPILinuxmacOS6.7From $1,450 a year - 14
Mailazy
Free planWebAPI6.7From $49 a month - 15
Mailtrap Email Sending
Free planWebAPI6.7From $15 a month - 16
Elastic Email
Free planWeb6.6From $29 a month - 17
MailPace
Free planWebAPI6.6$10 usage-based - 18
SocketLabs
WebAPISelf-hosted6.6From $39.95 a month - 19
OpenSend
Free planWebAPISelf-hosted6.5From $10 a month - 20
Brevo Transactional Email
Free planWeb6.4From $9 a month - 21
MailKite Server
Free planWebAPISelf-hosted6.4Free plan - 22
Plunk
Free planWebAPISelf-hosted6.4Free plan - 23
Emailit
WebAPI6.2From $20 a month - 24
Posta
Posta is a self-hosted email delivery platform for sending and receiving email through an HTTP API.
Free planWebAPISelf-hosted6.2Free plan - 25
ZeptoMail
ZeptoMail, now Zoho CPaaS, is a paid email service built exclusively for transactional messages such as verification codes and password resets.
Free planWebAPI6.2Free plan
Choosing well
Check the free plan and starting price
A free plan is available from services such as Brevo Transactional Email, CloudMailin, e2a, Elastic Email, Mailazy and MailerSend. Amazon SES and EmailEngine list paid pricing instead.
Starting prices differ: Brevo lists paid plans from $9/mo, e2a from $10/mo, MailerSend from $7/mo, Elastic Email from $29/mo and Mailazy from $100/mo.
Use a trial when you need a short test
CloudMailin lists a 7-day trial. EmailEngine and Mailazy list 14-day trials, while MailerSend also lists a 14-day trial.
Check trial terms alongside the free plan and paid starting price before moving a project.
Match sending and inbound needs
Compare the monthly send limit shown for an API. If your app must receive messages, check the inbound email field as well as outbound sending.
SMTP relay can help when existing software sends through SMTP instead of a direct API.
Plan for events and message design
Delivery event webhooks let an app react to delivery updates. Check this field if your workflow needs status changes in code.
Email templates can keep recurring messages consistent. Compare template support with the API features your app will call.
Check deployment and IP options
These services may run through an API, web interface or self-hosted setup, with listed platform coverage also including macOS, iOS and Linux. Confirm the route that fits your stack.
A dedicated IP option can matter for a sending setup that needs its own address. Check whether the service provides that option.
Questions people ask
Can I start without paying?
A free plan is listed for Brevo Transactional Email, CloudMailin, e2a, Elastic Email, Mailazy and MailerSend. Other services may list paid pricing or a trial instead.
Which services list a free trial?
CloudMailin lists a 7-day trial. EmailEngine, Mailazy and MailerSend list 14-day trials.
What should I compare besides price?
Compare monthly send limit, inbound email, delivery event webhooks, SMTP relay, email templates and dedicated IP options.
Can an Email API receive messages?
Inbound email is a comparison field for this category. Check the service details when your application needs to accept incoming mail.