nomoat / Categories / Transactional email software
Transactional email software
Small, specific transactional email tools, ready to use today. 54 products listed. Of these, 32 have a free plan.
- Custom SMTP
WordPress plugin that sends site email through a proper SMTP provider and logs each message so you can see if it arrived.
Free · Transactional email
- Dittofeed
Sends automated email, SMS, push and WhatsApp messages using user segments and a visual journey builder, and can be embedded in your app.
Subscription · Email marketing · Health and clinics
- EmailJS
Lets developers send templated email from browser or app code through their own mail provider, without writing a server.
Free plan · Transactional email · Developers
- Lettermint
Sends app and site emails such as receipts and password resets through EU-only servers, with an API, SMTP and SDKs.
Free plan · Email marketing · Developers
- Mail Baby
Outbound SMTP relay for servers and sites that filters spam and malware and handles sender reputation, billed per email.
Subscription · Transactional email · Developers
- Maileroo
An SMTP relay and email API for sending transactional and marketing mail from apps, with searchable delivery logs.
Free plan · Transactional email · Developers
- Mailwip
Forwards mail sent to any address on your own domain to your inbox, with an API for apps that receive email.
Since 2021
Subscription · Transactional email
- Notifly
A hosted API for product teams to send app notifications over email, SMS, push, chat and an in app inbox.
Since 2020
Free plan · Transactional email · Developers
- Pidgeon
Gives AI agents their own email addresses and inboxes through an API, hosted in the EU, for developers building agents.
Since 2026
Free plan · Transactional email · Developers
- Pingram
One API for sending and receiving email, SMS and voice calls, with US A2P 10DLC SMS registration handled for you.
Free plan · Transactional email · Developers
- SendRaven
Lets AI agents send, receive and reply to email in threads over an API or MCP, with usage limits and approvals.
Free plan · Transactional email · Developers
- SendStreak
Sits between your app and SES, Postmark, Gmail or SMTP to add templates, retries, logs and routing without switching provider.
Free plan · Transactional email · Developers
- Sendwithus
Lets teams edit, test and send transactional email templates without code deploys, with A/B tests and analytics.
Since 2014
Subscription · Transactional email · Software companies
- Sessy
Dashboard for email sent through Amazon SES showing bounces, deliveries, complaints, opens and clicks, run yourself or hosted.
Free · Transactional email · Developers
- Sidemail
Sends app emails like password resets through an API or SMTP, plus product updates and automated sequences, for SaaS companies.
Since 2025
Free trial · Email marketing · Software companies
- turboSMTP
SMTP relay and email API for sending transactional emails and newsletters, with delivery tracking and reports.
Free plan · Email marketing
- Wraps
Sets up Amazon SES inside your own AWS account and adds a dashboard for sending, broadcasts, automations and bounce handling.
Since 2026
Free plan · Email marketing · Developers
- AhaSend
Sends app emails through an API or SMTP relay, plus simple campaigns, hosted in Europe for developers and software teams.
Since 2025
Free plan · Email marketing · Developers
- Anypost
An email sending API and SMTP service for apps sending large volumes of receipts, resets and alerts, with a vetted shared network.
Since 2026
Subscription · Transactional email · Developers
- Bento
Sends email campaigns, automations and transactional email, with checks before sending and public delivery stats.
Since 2015
Subscription · Email marketing · Online sellers
- Check & Log Email
WordPress plugin that checks your site can send email and keeps a log of every message it sends.
Free plan · Transactional email · Agencies
- Dead Simple Email
An API that gives AI agents their own email inboxes to send and receive mail, with webhooks and scanning for prompt injection.
Since 2026
Free plan · Transactional email · Developers
- Emails. Done.
Sends ready-made app emails like password resets, verification and billing notices for developers who want no email setup work.
Since 2026
Transactional email · Developers
- FluentSMTP
A WordPress plugin that sends site emails through providers like Amazon SES or SendGrid so they reach inboxes reliably.
Free · Transactional email
- FreeResend
Self-hosted drop-in replacement for the Resend API that sends app email through Amazon SES for developers.
Since 2025
Free · Transactional email · Developers
- GoSMTP
WordPress plugin that sends site emails through an SMTP provider, with logs, resends and failure alerts.
Free plan · Transactional email
- Helo
Email API and SMTP relay for sending app emails, priced on usage, from an independent self-funded team.
Since 2026
Pay as you go · Transactional email · Developers
- inbound
An email API that developers use to receive mail on their own domain as JSON, route it and reply in the same thread.
Since 2025
Subscription · Transactional email · Developers
- KaiMail
Forwards mail sent to your own domain to an inbox or a webhook, and lets you send from that domain over SMTP.
Transactional email · Developers
- MailboxKit
Gives AI agents their own email address through an API or MCP server so they can send, read and reply to mail.
Since 2026
Free plan · Transactional email · Developers
- MailChannels
Sends email for hosting companies and multi-tenant apps, and stops spam from compromised customer accounts before it hurts delivery.
Transactional email · Developers
- MailHawk
Gets emails sent by WordPress sites into the inbox, with delivery logs, bounce handling and domain setup.
Transactional email
- notifkit
Notification server you run yourself: one request delivers by push, email, SMS or Slack, retrying and falling back as needed.
Since 2026
Free · Transactional email · Developers
- Novu
One API and an in-app inbox component that let software teams send notifications by email, SMS, push, chat and in-app.
Transactional email · Developers
- Pharos
Sends app email such as receipts and resets over an API or SMTP, and checks domain authentication before you start sending.
Free plan · Transactional email · Developers
- Plunk
Sends product emails, campaigns and automated sequences from one contact list, billed per email sent.
Since 2022
Free plan · Email marketing · Developers
- Post SMTP
Sends a WordPress site's emails through a proper mail service and logs them, with alerts when sending fails.
Transactional email
- Postal
An open source mail delivery server you run yourself to send and receive email for websites, like a self-hosted Sendgrid.
Free · Transactional email · Developers
- Recivo
Gives each of your app's users their own email address and passes incoming mail and attachments to your code by API or webhook.
Since 2025
Free plan · Transactional email · Developers
- Reloop
An open-source email service for developers that sends app email and campaigns, run in their cloud or on your own server.
Free plan · Email marketing · Developers
- Sequenzy
Sends marketing sequences, campaigns and transactional email for software teams, run from a dashboard, API or AI agent.
Since 2026
Email marketing · Developers
- Smaily
Send newsletters, automated emails and transactional messages with a simple editor and landing pages for collecting subscribers.
Free plan · Email marketing
- SMTPfast
An email sending API for developers that shows every message's path from queue to delivery, bounce or open.
Free plan · Transactional email · Developers
- Spark Editor
A drag and drop WordPress plugin for designing the order and account emails a WooCommerce store sends.
Free plan · Transactional email · Online sellers
- SuprSend
One API and dashboard for sending product notifications by email, SMS, push, Slack and in-app inbox.
Since 2022
Subscription · Transactional email · Developers
- Sweego
Send transactional email and SMS from your app through one API, then track delivery, with data kept in France.
Transactional email · Developers
- TopSend
Email campaigns, automations and transactional sending for one flat monthly fee, whatever the list size.
Since 2026
Subscription · Email marketing
- Trackkit
An API that adds open and click tracking to emails from any provider and sends the events to your app by webhook.
Since 2026
Free plan · Transactional email · Developers
- Unitpost
Sends app email and text messages such as receipts, login codes and newsletters through an API, SDKs or an AI agent.
Since 2026
Free plan · Email marketing · Developers
- useSend
Sends transactional and marketing email through an API or visual editor, billed by emails sent rather than contacts stored.
Free plan · Email marketing · Developers
- VaultSandbox
A self-hosted SMTP server for testing app email with real TLS, DKIM checks, spam scores and simulated delivery failures.
Since 2026
Transactional email · Developers
- WP Email Delivery
A hosted sending service for WordPress that routes site email through an API instead of SMTP and handles bounces.
Subscription · Transactional email
- YayMail
A WooCommerce plugin to redesign the order and account emails your store sends, using a drag and drop builder.
Transactional email · Online sellers
- Zedmail
Transactional email API and SMTP relay for apps, run by a Canadian company that keeps all data and servers in Canada.
Since 2026
Free plan · Transactional email · Developers