SendGrid is a cloud-based email delivery platform by Twilio that provides developers and businesses with transactional and marketing email infrastructure via RESTful API and SMTP relay. Trusted by companies of all sizes, it handles billions of emails monthly with industry-leading deliverability rates.
SendGrid is the definitive choice for teams whose notification needs center on email deliverability. Pair it with a notification orchestration layer for multi-channel coverage.
Best overall for deliverability consultants who need full infrastructure control — dedicated IPs, validation, spam testing, and granular authentication in one platform.