SendGrid

Scalable email API and marketing platform trusted by millions

From $0/mo

About SendGrid

SendGrid is a battle-tested email delivery platform that has been operating since 2009 and was acquired by Twilio in 2019. It provides a powerful Email API for transactional emails alongside a Marketing Campaigns product for newsletters and bulk sends. The platform supports advanced features like dynamic templates, IP warmup, dedicated IPs, and subuser management for agencies. SendGrid's infrastructure handles billions of emails monthly, making it one of the most scalable options available. Its extensive documentation, wide integration ecosystem, and free tier make it a default choice for many developers. However, the Twilio acquisition has brought pricing increases and some UI complexity over the years.

Key Features

Transactional Email API with SMTP relay

Marketing Campaigns with drag-and-drop editor

Dynamic email templates with Handlebars

Dedicated IP addresses

Advanced analytics and click/open tracking

Subuser account management

Event Webhook for real-time notifications

Pros & Cons

Pros

• Industry-proven at massive scale with years of reliability data
• Combines transactional API and marketing campaigns in one platform
• Huge ecosystem of integrations and community resources
• Free tier allows real testing before committing

Cons

• UI has become cluttered and confusing after Twilio acquisition
• Customer support quality has declined significantly post-acquisition
• Free tier's 100 emails/day limit is very restrictive
• Pricing is less competitive than newer alternatives like Resend

Best For

Established companies needing combined transactional and marketing email High-volume senders requiring proven infrastructure Teams already in the Twilio ecosystem Agencies managing multiple client email programs