FastMail, founded in 1999 in Melbourne, Australia, is a veteran premium email service. Its proprietary JMAP protocol delivers real-time unified sync for email, calendar, and contacts, known for custom domains, privacy, and low-latency performance.
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.
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.
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.
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.
Zoho is an enterprise software suite provider founded in 1996 and headquartered in Chennai, India, offering 60+ deeply integrated applications covering CRM, email, accounting, and HR, with more than 150,000,000 users worldwide.
Launched in 2021 by Basecamp (Chicago, IL), HEY is a ground-up redesign of email featuring the Imbox triage system, sender Screening, and automatic tracker blocking for a radically different email experience.