# SendGrid **Source:** https://geo.sig.ai/brands/sendgrid **Vertical:** Marketing **Subcategory:** Marketing Automation **Tier:** Emerging **Website:** sendgrid.com **Last Updated:** 2026-04-14 ## Summary Twilio's email API platform sending 148B+ emails monthly; transactional and marketing email infrastructure with 80K+ customers competing with Mailgun for developer email delivery. ## Company Overview SendGrid is Twilio's email API and deliverability platform — providing RESTful email APIs, SMTP relay service, and marketing campaign tools for businesses and developers to send transactional emails (order confirmations, password resets, notifications) and marketing emails at scale with high deliverability rates. Acquired by Twilio in 2019 for $2 billion, SendGrid processes 148 billion+ emails monthly with 80,000+ customers including Airbnb, Spotify, and Uber relying on its infrastructure for critical communication.\n\nSendGrid's platform provides two main capabilities: the Email API for programmatic transactional email sending (developers integrate the REST API or SMTP relay to trigger automated emails from their applications) and the Marketing Campaigns product for newsletter and promotional email management with a template editor, contact list management, and campaign analytics. SendGrid's deliverability infrastructure — IP warm-up management, bounce handling, unsubscribe processing, feedback loop management with major ISPs — handles the technical complexity of ensuring emails reach inboxes rather than spam folders at sending volumes where individual sender reputation management becomes critical.\n\nIn 2025, SendGrid faces the evolving deliverability landscape as Microsoft Outlook joined Gmail in implementing stricter sender requirements (DMARC authentication, unsubscribe handling, complaint rate thresholds) that senders must meet to avoid spam filtering. As part of Twilio, SendGrid is integrated into Twilio's Customer Engagement Platform alongside voice, SMS, and WhatsApp. SendGrid competes with Mailgun (Rackspace), Postmark (ActiveCampaign), Amazon SES, and SparkPost for transactional email API market share. The 2025 strategy focuses on growing as an integrated Twilio product for customers using multiple communication channels, expanding deliverability guidance tools for senders navigating tightening inbox provider requirements, and maintaining deliverability leadership. ## Frequently Asked Questions ### What is SendGrid? SendGrid is Twilio's email API and delivery platform that provides email delivery services for businesses. It sends over 148 billion emails monthly with 99% deliverability and serves more than 80,000 customers globally. ### What products and services does SendGrid offer? SendGrid offers Email API (RESTful and SMTP), transactional email delivery, marketing campaigns, email deliverability optimization, and contact management. The platform also provides email statistics monitoring and supports both RESTful APIs and SMTP relay integration. ### Who uses SendGrid? SendGrid serves over 80,000 customers globally who collectively send 45 billion emails per month. The platform is designed for businesses needing reliable transactional email delivery and marketing campaign capabilities. ### When was SendGrid founded? SendGrid was founded in 2009 and is based in Denver, Colorado. ### Where is SendGrid headquartered? SendGrid is headquartered in Denver, Colorado. ### What is SendGrid's relationship with Twilio? SendGrid was acquired by Twilio and is now part of Twilio's Customer Engagement Platform. It operates as Twilio's email API and delivery solution. ### What are SendGrid's key performance metrics? SendGrid sends 148 billion+ emails monthly with a 99% deliverability rate. The platform serves 80,000+ customers globally who send 45 billion emails per month through the service. ### What technology does SendGrid use for email delivery? SendGrid provides both RESTful APIs and SMTP relay integration for sending emails. The platform supports transactional email delivery, marketing campaigns, contact management, and email statistics monitoring. ### How can I integrate SendGrid into my application? SendGrid can be integrated using either RESTful APIs or SMTP relay. The platform supports transactional emails, marketing campaigns, contact management, and provides email statistics monitoring capabilities. ### What are SendGrid's recent developments? SendGrid released the 2025 Email Deliverability Guide covering Microsoft Outlook joining mailbox requirements and Gmail Feedback Loop Identifiers. The platform currently sends 148B+ emails monthly with 99% deliverability and serves 80,000+ customers globally. ## Tags b2b, enterprise, global, marketing, martech, saas --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*