No moat. Still in business.
Software directory for those who don’t want to rebuild, own the updates, the bugs, the support.
- Maileroo
An SMTP relay and email API for sending transactional and marketing mail from apps, with searchable delivery logs.
Free plan · Transactional email · Developers
- 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
- 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
- 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
- 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
- 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
- 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
- YayMail
A WooCommerce plugin to redesign the order and account emails your store sends, using a drag and drop builder.
Transactional email · Online sellers
- Post SMTP
Sends a WordPress site's emails through a proper mail service and logs them, with alerts when sending fails.
Transactional email
- GoSMTP
WordPress plugin that sends site emails through an SMTP provider, with logs, resends and failure alerts.
Free plan · Transactional email
- FluentSMTP
A WordPress plugin that sends site emails through providers like Amazon SES or SendGrid so they reach inboxes reliably.
Free · Transactional email
- MailHawk
Gets emails sent by WordPress sites into the inbox, with delivery logs, bounce handling and domain setup.
Transactional email