Method: Official documentation and pricing checked September 28, 2026. No benchmarks were run. Recommendations are based on documented features and billing, not hands-on results.
Resend offers a continuing free transactional plan; SendGrid’s current entry offer is a time-limited trial. That distinction matters more for a small application than an unsupported claim that one API delivers mail faster.
Current transactional pricing
| Service | Entry allowance | Paid starting point |
|---|---|---|
| Resend | 3,000 emails/month, capped at 100/day, on Free | Pro $20/month for 50,000 emails; $0.90 per additional 1,000 when overages are enabled |
| SendGrid Email API | 100 emails/day during a 60-day trial | Essentials starts at $19.95/month; the selected volume and features determine the price |
Sources: Resend pricing, Twilio’s Email API pricing. Taxes and additional products can change the total. Do not describe the SendGrid trial as a permanent free plan.
SendGrid’s upgrade documentation says sending requires a paid upgrade after the trial. The trial starts at signup, and upgrading ends it. Plan for the recurring cost before relying on the service for account recovery or receipts.
Count the right kind of email
Resend distinguishes transactional sends through its email API from marketing Broadcasts. Broadcasts have a separate contact-based plan and do not consume the transactional allowance. Received email counts toward transactional quota. A 50,000-email plan is therefore not necessarily 50,000 outbound customer messages if you also receive email.
Twilio separates Email API and Marketing Campaigns products. Select the product you need before comparing a headline price. A newsletter audience and application notifications can produce different purchasing requirements.
What the pricing cannot tell you
A provider’s acceptance response is not evidence that the message reached a user’s inbox. This article contains no controlled inbox-placement results, latency measurements or migration timings. Vendor testimonials are not measurements from this site.
Use a controlled pilot to check domain authentication, template rendering, event delivery, suppression handling and retries. Record what happens when the API times out: retrying a request must not accidentally create duplicate customer messages. Keep message identifiers and error handling understandable in application logs.
Recommendation
Evaluate Resend first if its ongoing free quota fits a small transactional workload. Evaluate SendGrid if its selected paid plan and integrations fit an existing system. At higher volumes, obtain the exact quote and compare required features rather than treating the five-cent difference between entry prices as the deciding factor.
Do not move production email solely on a claimed deliverability percentage from an unsourced comparison. Choose after checking the integration and the complete bill for the emails your application actually sends.
Sources, checked September 28, 2026: Resend pricing, SendGrid Email API pricing, SendGrid trial rules.