turboSMTP
by turboSMTPIt may suit website and app operators who need transactional email, as well as teams sending newsletters or marketing campaigns.
Free plan Free trial From €14.95 a month AndroidiPhone & iPadWebWindowsMacLinux+1
- Home
- Communication
- Email APIs
Best Email APIs 2026
Facts read 23 Sep 2026 – 15 Oct 2026
Email APIs connect software to email delivery and inbound mail. This list helps buyers compare services for sending messages, receiving email and handling delivery events.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 turboSMTP | It may suit website and app operators who need transactional email, as well as teams sending newsletters or marketing campaigns. | 6.6 | €14.95 a month | Free plan | Android, iPhone & iPad, Web, Windows | 14 Oct 2026 |
| 02 MailerSend | MailerSend suits teams that need transactional email tools and integrations with listed services. | 5.7 | $7 a month, billed yearly | Free plan | iPhone & iPad, Web, API | 15 Oct 2026 |
| 03 CloudMailin | It suits developers who need inbound email delivered to an application webhook, or transactional email sent through an API or SMTP relay. | 5.4 | $25 a month | Free plan | Web, API | 5 Oct 2026 |
| 04 Postmark | Postmark suits developers and teams that need to send and track transactional or broadcast application email. | 5.4 | Free plan | Free plan | Web, API | 28 Sep 2026 |
| 05 Twilio SendGrid | SendGrid suits developers and organizations sending transactional or marketing email through APIs or SMTP. | 5.3 | $19.95 a month | Free plan | API | 3 Oct 2026 |
| 06 e2a | 5.1 | $10 a month | Free plan | Web, API, Self-hosted | 8 Oct 2026 | |
| 07 Maileroo | Maileroo is aimed at developers and scaling businesses, including startups, agencies, and enterprises. | 5.1 | $10 a month | Free plan | Web, API | 2 Oct 2026 |
| 08 Mailjet | 5.1 | $9 a month | Free plan | Web, API | 28 Sep 2026 | |
| 09 Mailtrap Email Sending | 5.1 | $15 a month | Free plan | Web, API | 1 Oct 2026 | |
| 10 Plunk | Plunk suits developers, marketers, and teams sharing email templates. | 5.1 | Free plan | Free plan | Web, API, Self-hosted | 8 Oct 2026 |
Entries are ordered from newer releases to older releases using figures published by the makers, not a score. Compare services by price, platform access, send limits, inbound email, webhooks, SMTP relay, templates and dedicated IP options.
02
MailerSend
MailerSend suits teams that need transactional email tools and integrations with listed services.
iPhone & iPadWebAPI Record5.7 Visit
03
CloudMailin
It suits developers who need inbound email delivered to an application webhook, or transactional email sent through an API or SMTP relay.
WebAPI Record5.4 Visit
04
Postmark
Postmark suits developers and teams that need to send and track transactional or broadcast application email.
WebAPI Record5.4 Visit
05
Twilio SendGrid
SendGrid suits developers and organizations sending transactional or marketing email through APIs or SMTP.
API Record5.3 Visit
7
Maileroo
WebAPI $10 a month Record5.1 Visit Maileroo is aimed at developers and scaling businesses, including startups, agencies, and enterprises.
10
Plunk
WebAPISelf-hosted Free plan Record5.1 Visit Plunk suits developers, marketers, and teams sharing email templates.
12
SMTP2GO
WebAPI $100 a year Record5.1 Visit SMTP2GO suits senders needing SMTP relay or API delivery, reporting, webhook events, and integrations.
Before you choose
Compare free and paid access
Pricing models include free plans and paid options. Check the published paid-from price for the service you are considering.
Certain services on this list include a free trial. Trial terms differ, so read the offer before signing up.
Match the platform to your stack
Platform coverage spans API, web, self-hosted, macOS, iOS and Linux among the listed services. Choose the access method that fits your application and operating system.
Check sending controls
Review each service's monthly send allowance and whether it supports SMTP relay. These details show how a service can fit your message volume and delivery setup.
Review inbound mail and events
Inbound email support matters when an application must receive messages. Delivery event webhooks can pass status changes back to your software.
Look at templates and IP options
Email templates can shape how messages are prepared. If your setup needs its own sending address, check whether a dedicated IP is available.
Questions
Are free plans offered by Email APIs?
Yes. Services on this list include free plans alongside paid pricing models.
Are free trials available?
Yes. Some listed services provide trials; examples shown are seven-day and 14-day offers.
Which sending capacities and relay features should I review?
Review the monthly volume allowance and whether SMTP relay is supported by the service you are considering.
Can these Email APIs receive inbound messages?
Inbound email appears as a comparison field here, along with delivery-event webhooks.
More in Communication
Live TV streaming services 169Business Phone Systems 167Email clients 142Audience Response Systems 118Personal Email Services 115Online Fax Services 103Intranet Software 74Team chat apps 63Webinar Software 62Online Community Platforms 54Virtual Event Platforms 47Email Tracking Software 43Video Conferencing Software 43Contact Center Software 38Call Tracking Software 36Meeting Management Software 36Secure Messaging Apps 36Virtual Receptionist Services 36