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Best Transactional email services in 2026

41 apps
Research read 28 Sept 2026
How the order is worked out

1

Plunk

Free plan APISelf-hostedWeb

Choose Plunk if you want transactional email, campaigns and event-based workflows in one platform, with API, SMTP and self-hosting options.

7.5 Free plan · paid from $0.00 Visit site
2

Postmark
by Postmark
Free plan APIWeb

Postmark offers application email delivery, tracking, and inbound processing with a permanent but limited free tier.

7.4 Free plan · paid from $15/mo Visit site
3

Twilio SendGrid
by Twilio SendGrid
Free plan API

Twilio SendGrid provides several sending interfaces, developer libraries, message tools, and delivery tracking.

7.3 From $19.95/mo · 60-day trial Visit site
4

Maileroo
by Maileroo
Free plan APIWeb

Maileroo combines sending, inbound handling, testing and delivery analytics in web and API access. Review the monthly and hourly limits against your sending needs before choosing a plan.

7.3 Free plan Visit site
5

Hyvor Relay
by Hyvor Relay
Free plan APISelf-hostedWeb

Choose Hyvor Relay if you need a developer-focused email API with self-hosting, automation, and delivery event reporting.

7.3 Free plan · paid from €30/mo Visit site
6

Posta

Free plan APISelf-hostedWeb

Choose Posta if your team can run email infrastructure and wants API sending, SMTP relay, inbound mail, templates, and webhooks in one platform.

7.3 Open source Visit site
7

QQueue

Free plan APISelf-hostedWeb

QQueue combines campaign and transactional email with self-hosted control, tracking, and webhook support.

7.3 Free plan Visit site
8

turboSMTP
by turboSMTP
Free plan AndroidAPIiPhone+4

turboSMTP combines SMTP delivery, campaign tools, and message tracking, with plans ranging from a time-limited free option to paid monthly plans.

7.3 From €14.95/mo Visit site
9

EmailSuccess
by EmailSuccess
Free plan APIMacSelf-hosted+2

Choose EmailSuccess for enterprise gateways and high-volume SMTP operations that need delivery tuning, traffic controls, and email authentication features.

7.3 Free plan Visit site
10

Netcore Email API
by Netcore Email API
Free plan APIWeb

Choose Netcore Email API if your business needs transactional or triggered email with API controls, delivery visibility, and sender-reputation tools.

7.2 Free plan Visit site
11

ReachMail
by ReachMail
Free plan AndroidAPIiPhone+1

ReachMail brings campaign creation, audience tools, automation, and transactional relay into one service. Its free plan has stated contact and email limits, while paid plans start at $8/mo.

7.2 Free plan · paid from $8/mo · 14-day trial Visit site
12

Aritic Mail
by Aritic Mail
Free plan APIWeb

Aritic Mail focuses on transactional delivery with integration, monitoring, reporting, and inbound processing tools.

7.1 From $9 Visit site
13

Nuntly
by Nuntly
Free plan APIWeb

Nuntly covers outbound and inbound transactional email with APIs, SDKs, and webhook-based visibility.

7.1 Free plan · paid from €10/mo Visit site
14

Mailmark
by Mailmark
Free plan APISelf-hostedWeb

Mailmark covers operational email needs from DNS setup through campaigns and delivery monitoring. Its open-source, self-hosted model and developer APIs are balanced by plan-based sending limits.

7.1 Free plan · paid from $10/mo · 7-day trial Visit site
15

Mailchimp
by Mailchimp
Free plan AndroidAPIiPhone+1

Choose Mailchimp if you want email marketing with automation, segmentation and campaign testing in one service.

7.1 Free plan · 14-day trial Visit site
16

Posthawk
by Posthawk
Free plan Self-hosted

Choose Posthawk if you need an email delivery service with multiple sending methods, templates, webhooks, and a choice of managed or self-hosted deployment.

6.9 Free plan · paid from $20/mo Visit site
17

Reloop

Free plan Self-hosted

Reloop provides multiple delivery routes, developer integrations, and hosted or self-hosted operation. Check the Free plan caps and hosted resource limits when choosing a setup.

6.9 Free plan · paid from $10/mo Visit site
18

Resend Broadcasts
by Resend Broadcasts
Free plan APIWeb

Resend Broadcasts combines a visual editor, scheduling, contact-level tracking and API controls for campaigns to existing contacts.

6.9 Free plan · paid from $20/mo Visit site
19

MailerSend

Free plan APIiPhoneWeb

MailerSend combines transactional sending with tools for templates, monitoring and inbound reply handling. Review the Free plan and trial limits, and note that the mobile app is iOS-only.

6.9 Free plan · paid from $7/mo · 14-day trial Visit site
20

Twilio Segment
by Twilio Segment
Free plan AndroidAPIiPhone+1

Choose Twilio Segment if your team needs customer profiles, identity resolution, and audience activation across web and mobile channels.

6.9 Free plan · paid from $120/mo · 14-day trial Visit site
21

Pombo

Free plan APIWeb

Choose Pombo if you need marketing, lifecycle, or transactional email with AI-assisted campaign creation and approval before sending.

6.8 Free plan · paid from $29/mo Visit site
22

Emailit

Free plan APIWeb

Emailit brings campaign tools, transactional delivery, inbound routing, integrations, and security controls together.

6.8 From $20 Visit site
23

MailsSetu

Free plan APIWeb

Choose MailsSetu if you need transactional email with API or SMTP access, operational logs, templates, and delivery events.

6.7 Free plan · paid from ₹399/mo Visit site
24

SMTP2GO

Free plan APIWeb

SMTP2GO combines SMTP and API delivery with event reporting, authentication and integrations.

6.7 Free plan · paid from $10/mo Visit site
25

Waypoint

Free plan APIWeb

Waypoint pairs an email API with visual template editing and activity logs for transactional messaging teams. Its stated exclusions and plan limits matter when matching it to a sending workflow.

6.6 Free plan · paid from $20/mo Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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