Best email APIs for developers in 2026
Transactional email APIs and SMTP services compared, with links to what developers say about them.
SendHQ
A developer email API with a Resend-style send shape. Multiple domains, inbound mail and a built-in inbox, running on Amazon SES.
Transactional email APIs43 providers
Brevo
Transactional email APIsIndependent look at Brevo: what it does, pricing and where people review it.
Resend
Transactional email APIsIndependent look at Resend: what it does, pricing and where people review it.
SMTP2GO
Transactional email APIsIndependent look at SMTP2GO: what it does, pricing and where people review it.
Mailtrap
Transactional email APIsIndependent look at Mailtrap: what it does, pricing and where people review it.
Mailgun
Transactional email APIsIndependent look at Mailgun: what it does, pricing and where people review it.
SendGrid
Transactional email APIsIndependent look at SendGrid: what it does, pricing and where people review it.
MailSlurp
Transactional email APIsIndependent look at MailSlurp: what it does, pricing and where people review it.
MailerSend
Transactional email APIsIndependent look at MailerSend: what it does, pricing and where people review it.
MailPro
Transactional email APIsIndependent look at MailPro: what it does, pricing and where people review it.
Mailjet
Transactional email APIsIndependent look at Mailjet: what it does, pricing and where people review it.
Postmark
Transactional email APIsIndependent look at Postmark: what it does, pricing and where people review it.
Turbo SMTP
Transactional email APIsIndependent look at Turbo SMTP: what it does, pricing and where people review it.
Sequenzy
Transactional email APIsIndependent look at Sequenzy: what it does, pricing and where people review it.
Forward Email
Transactional email APIsIndependent look at Forward Email: what it does, pricing and where people review it.
SMTP.com
Transactional email APIsIndependent look at SMTP.com: what it does, pricing and where people review it.
AgentMail
Transactional email APIsIndependent look at AgentMail: what it does, pricing and where people review it.
Mailercloud
Transactional email APIsIndependent look at Mailercloud: what it does, pricing and where people review it.
Loops
Transactional email APIsIndependent look at Loops: what it does, pricing and where people review it.
Elastic Email
Transactional email APIsIndependent look at Elastic Email: what it does, pricing and where people review it.
DuoCircle
Transactional email APIsIndependent look at DuoCircle: what it does, pricing and where people review it.
Maileroo
Transactional email APIsIndependent look at Maileroo: what it does, pricing and where people review it.
SendX
Transactional email APIsIndependent look at SendX: what it does, pricing and where people review it.
SocketLabs
Transactional email APIsIndependent look at SocketLabs: what it does, pricing and where people review it.
EmailLabs
Transactional email APIsIndependent look at EmailLabs: what it does, pricing and where people review it.
SendLayer
Transactional email APIsIndependent look at SendLayer: what it does, pricing and where people review it.
UniOne
Transactional email APIsIndependent look at UniOne: what it does, pricing and where people review it.
Plunk
Transactional email APIsIndependent look at Plunk: what it does, pricing and where people review it.
MailChannels
Transactional email APIsIndependent look at MailChannels: what it does, pricing and where people review it.
SparkPost
Transactional email APIsIndependent look at SparkPost: what it does, pricing and where people review it.
Dreamlit
Transactional email APIsIndependent look at Dreamlit: what it does, pricing and where people review it.
Netcore
Transactional email APIsIndependent look at Netcore: what it does, pricing and where people review it.
Sidemail
Transactional email APIsIndependent look at Sidemail: what it does, pricing and where people review it.
Nitrosend
Transactional email APIsIndependent look at Nitrosend: what it does, pricing and where people review it.
EmailEngine
Transactional email APIsIndependent look at EmailEngine: what it does, pricing and where people review it.
Nuntly
Transactional email APIsIndependent look at Nuntly: what it does, pricing and where people review it.
MailPace
Transactional email APIsIndependent look at MailPace: what it does, pricing and where people review it.
Xmit
Transactional email APIsIndependent look at Xmit: what it does, pricing and where people review it.
AhaSend
Transactional email APIsIndependent look at AhaSend: what it does, pricing and where people review it.
Sweego
Transactional email APIsIndependent look at Sweego: what it does, pricing and where people review it.
EmailBump
Transactional email APIsIndependent look at EmailBump: what it does, pricing and where people review it.
SendClean
Transactional email APIsIndependent look at SendClean: what it does, pricing and where people review it.
SendPigeon
Transactional email APIsIndependent look at SendPigeon: what it does, pricing and where people review it.
TinySend
Transactional email APIsIndependent look at TinySend: what it does, pricing and where people review it.
Notification & customer messaging platforms9 providers
Twilio
Notification & customer messaging platformsIndependent look at Twilio: what it does, pricing and where people review it.
Infobip
Notification & customer messaging platformsIndependent look at Infobip: what it does, pricing and where people review it.
Customer.io
Notification & customer messaging platformsIndependent look at Customer.io: what it does, pricing and where people review it.
Knock
Notification & customer messaging platformsIndependent look at Knock: what it does, pricing and where people review it.
Courier
Notification & customer messaging platformsIndependent look at Courier: what it does, pricing and where people review it.
Nylas
Notification & customer messaging platformsIndependent look at Nylas: what it does, pricing and where people review it.
Unipile
Notification & customer messaging platformsIndependent look at Unipile: what it does, pricing and where people review it.
Bento
Notification & customer messaging platformsIndependent look at Bento: what it does, pricing and where people review it.
SuprSend
Notification & customer messaging platformsIndependent look at SuprSend: what it does, pricing and where people review it.