SendGrid API (Twilio)
Transactional and marketing email for 100,000+ businesses
Freemium
✓ Verified
🇺🇸 United States
SendGrid (owned by Twilio) is the most widely used email API, handling over 100 billion emails monthly for customers like Airbnb, Uber, and Spotify. The API covers transactional sends, marketing campaigns, email templates, analytics, deliverability tools, and email validation. The free tier of 100 emails/day is sufficient for development. Paid plans start at $19.95/month for 50,000 emails. Features include domain authentication, dedicated IPs, unsubscribe management, and A/B testing. The deliverability reputation and infrastructure are best-in-class.
API Details
Auth Method
API Key
Pricing Model
Freemium
Free Tier
Yes — 100 emails/day forever free
Rate Limit
600 emails/min
Format
REST / JSON
Versioning
v3
SLA / Uptime
99.95%
Compliance
SOC 2, GDPR, HIPAA, CAN-SPAM
Geographic Restrictions
Global
Last Verified
2026-02-20
Categories
Frequently Asked Questions
SendGrid has a free plan sending up to 100 emails per day permanently u2014 useful for development but insufficient for production. The Essentials plan starts at $19.95/month for 50,000 emails/month ($0.85 per 1,000 above). Pro starts at $89.95/month for 100,000 emails/month with additional features like IP warmup and dedicated IPs.
SendGrid is one of the highest-deliverability email services, trusted by over 80,000 customers. Its shared IP pool is carefully managed to maintain reputation. For best deliverability, use a dedicated IP ($30/month extra) and set up proper SPF, DKIM, and DMARC DNS records. SendGrid's reputation management tools help maintain sender score over time.
Transactional emails are triggered by user actions u2014 order confirmations, password resets, account notifications. Marketing emails are bulk campaigns sent to subscriber lists. SendGrid handles both via the same API, but they should use separate IP pools and subdomains to protect transactional deliverability from marketing reputation issues.
Dynamic Templates are email templates stored in SendGrid and rendered server-side with Handlebars-style variable substitution. You design the template in SendGrid's editor (drag-and-drop or HTML), then pass data via the API at send time. This separates email design from code, enables non-technical team members to update templates, and reduces payload size in API calls.