MailerSend
MailerSend is a hassle-free transactional messaging service designed so that developers can integrate transactional email, SMS, and now WhatsApp quickly and effortlessly into their stack.
Intuitively designed so anyone can contribute, with a powerful sending infrastructure and flexible payment plans that empower you to scale your sendings quickly. With over a decade of deliverability expertise, and inbuilt email verification, you can rest easy knowing your sender reputation will remain intact.
Plus, premium features including sender identities, dedicated IPs, and priority support make for an advanced, comprehensive solution.
Get started for FREE with 500 emails, then upgrade for as little as $7/month for up to 5000 emails. Want to try more? Get a 14-day free trial of our Professional plan and test-drive every feature it has to offer.
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Spotler SendPro
Rock-solid reputation and a reliable API with endless possibilities for sending your transactional emails. Transactional emails are more than just invoice emails or order confirmations. This also includes emails such as shipping confirmation emails, forgotten password emails, multi-factor authentication emails, or pay slip emails. Transactional emails are triggered directly or indirectly by the recipient, making it very important that the emails always end up in the inbox. With an average inbox placement of 99.8%, Spotler Sendpro has a rock-solid sending reputation. Whether you send order confirmations from your webshop, an invoice from your ERP, or a password-forgotten email from your CRM, with Spotler SendPro you can centralize, optimize and analyze all transactional emails that leave your company. With our powerful template engine, you can use the same email template for all your different brands. This way you create one consistent brand experience.
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SMTP Senpai
SMTP Senpai is MailSenpai's EU-hosted SMTP relay and REST email API for password resets, order confirmations, notifications and website forms. Connect via SMTP on port 2525 or 587 with STARTTLS, the REST API, or a form endpoint for static sites. DKIM signing uses your verified sender domain, with SPF/DKIM/DMARC checks and automatic suppression of bounced addresses. The permanent free plan includes 5,000 emails per calendar month, up to 200 per day and 30 in the preceding hour, one verified sender domain and 7-day sending logs. No card or expiry. Paid annual plans start at EUR 12.90 per month plus VAT for 10,000 emails per month and 90-day logs. An email report is sent weekly on Monday. Official WordPress and Drupal plugins and open-source SDKs support integration. Written support is available in English and Italian. MailSenpai is the separate newsletter and email marketing platform.
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SendGrid
Email is the backbone of your customer engagement. The Twilio SendGrid Email API is the email service trusted by developers and marketers for time-savings, scalability, and delivery expertise. Our flexible Email API and proprietary Mail Transfer Agent (MTA), intuitive console, powerful features, and email experts make it easy to ensure all your email gets delivered in seconds and without interruption. Monitor engagement data and optimize deliverability with our Deliverability Insights dashboard.
Whether you’re sending 100 emails or 100 billion, SendGrid is built to scale. Integrate with our RESTful APIs and SMTP in minutes, with sample code libraries available in 7 languages, interactive docs, templates, and more.
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