Resend is a next-generation email sending API platform that stands out with modern developer experience and React Email integration, with a clean, type-safe API loved by frontend and backend developers.
Postmark was founded in 2009 and is headquartered in Philadelphia, USA. It is a high-deliverability transactional email platform with 99% of emails delivered within 30 seconds, strictly for transactional scenarios such as password resets and order confirmations.
Founded in 2007 in the US, Mailinator pioneered the "public inbox" model for temporary email — any @mailinator.com address is instantly accessible without registration. With APIs and SDKs for developer automation testing, it is one of the most well-known temporary email tools among developers.
Twilio SendGrid is a scalable email sending platform headquartered in Denver, United States, offering high-deliverability APIs, marketing email, and transactional email services for developers and sending scenarios.
SMTP2GO is a New Zealand-based email delivery platform founded in 2012, offering SMTP relay and REST API. Free tier includes 1,000 emails/month, email logs, webhooks, and sending analytics — ideal for small teams and developers.
SendPulse Email is the email sending component of the SendPulse platform, offering SMTP/API email delivery with a permanent free daily allocation, suited for budget-conscious SMB email marketing needs.
Brevo (formerly Sendinblue) is a France-based omnichannel marketing platform combining email, SMS, WhatsApp, chat, and CRM with visual campaign builder, automation workflows, and AI optimization.
SendGrid Email is Twilio's email delivery API product processing billions of emails daily, featuring v3 API, SMTP relay, delivery analytics, dynamic templates, and sender reputation management.
SendCloud is a Netherlands-based email delivery platform founded in 2014, specializing in SMTP/API email sending for ecommerce and SaaS businesses with automation and deliverability optimization.
Postmark Email is a high-deliverability transactional email service known for sub-1-second average delivery, Message Stream technology, and precise bounce handling — the developer's choice for transactional email.
Pepipost is an India-based email API service provider founded in 2014, now part of Netcore Cloud. It specializes in SMTP relay and transactional email delivery, processing billions of emails daily with developer-friendly APIs and high deliverability.
MailPace is a US-based email delivery service founded in 2020, specializing in transactional email tracking and deliverability optimization with SMTP/API dual-channel access and real-time tracking capabilities.
Mailjet, founded in 2010 in Paris, France (now part of Sinchn/Pathwire), provides a unified transactional and marketing email API service trusted by 55,000+ customers, with 6,000 free emails/month and full GDPR compliance.
Mailgun Email is a developer-focused email API product offering RESTful API, SMTP relay, real-time analytics, smart bounce management, and event webhooks, processing billions of emails daily.
MailerSend is a UK-based developer email API platform founded in 2019, offering 12,000 free emails per month via SMTP and REST API.
Maileroo is an Australia-based email delivery service founded in 2020, offering a simple API and SMTP interface designed for developers, with low cost and developer-friendly pricing for startups and small teams.
Mailchimp Email is a leading email marketing platform offering drag-and-drop builder, marketing automation workflows, audience segmentation, and A/B testing to manage the full email marketing lifecycle.
Elastic Email is a Canada-based email sending service founded in 2013, offering pay-as-you-go pricing with no minimums, dual API/SMTP support, and a free plan. Ideal for budget-conscious developers and small teams.
Founded in 2014 and headquartered in Exton, Pennsylvania, SocketLabs is a developer-focused email infrastructure platform offering SMTP relay and REST API for transactional and marketing email delivery.
EmailLabs is a Poland-based email delivery and marketing platform offering SMTP relay and email API with separate routing for transactional and marketing traffic, dedicated IPs, full authentication, and real-time delivery analytics — particularly strong in Eastern Europe.
SparkPost is a provider focused on transactional email sending, offering reliable email infrastructure and efficient delivery, processing over 4 billion emails per day.
Mailjet was founded in 2010 and is headquartered in Paris, France, serving 55K+ users as an email API and marketing platform. A collaborative editor, SMTP relay, and GDPR compliance suit teams managing both marketing and transactional email for European markets.
MailerSend, founded in 2019 and headquartered in the United Kingdom, is a developer-focused email API and SMTP relay platform with a free tier of 12,000 emails per month, ideal for transactional and notification emails.
Twilio SendGrid was founded in 2009 and is headquartered in Denver, USA, as an email sending API and marketing platform processing 80B+ emails daily. REST API and SMTP integration serve startups to Fortune 500 companies.