Transactional Email

SendGrid

SendGrid is Twilio's transactional/marketing email API, acquired by Twilio for $3B in Feb 2019 and now being merged into the twilio.com domain (announced Feb 2026). Its permanent free tier was retired May 27, 2025, replaced by a 60-day trial capped at 100 emails/day. Current Email API plans: Essentials $19.95/mo for 50K emails (~$1.00/1,000 overage), Pro $89.95/mo for 100K-2.5M emails (~$0.85-0.90/1,000 overage), Premier custom-priced above 5M/mo; an extra dedicated sending IP costs $30/mo. The REST API is v3, shipping official SDKs in 7 languages. A separate Marketing Campaigns line starts at Basic $15/mo for 300K sends. By contrast, Amazon SES charges a flat $0.10 per 1,000 emails with no plan tiers at all. Current version/status: v3 REST API (current); permanent free tier retired May 27, 2025. License: proprietary SaaS. Pricing: No permanent free tier (retired May 27, 2025) — 60-day trial capped at 100 emails/day; Essentials $19.95/mo for 50K emails (~$1.00/1,000 overage); Pro $89.95/mo for 100K-2.5M emails (~$0.85-0.90/1,000 overage); Premier custom above 5M/mo; dedicated IP +$30/mo. Maintained by Twilio (acquired Feb 2019 for $3B; SendGrid brand merging into twilio.com, announced Feb 2026).

Also known as: SendGrid API, Twilio SendGrid, Sendgrid (common misspelling), SG, SendGrid Email Service
🧊Why learn SendGrid?

Pick SendGrid if you're already on Twilio for SMS/voice and want transactional email, marketing automation, and IP warmup under one dashboard with enterprise deliverability tooling — that consolidation pays off past ~500K sends/mo. Don't pick it for a side project or MVP: since the May 2025 free-tier cut, Resend (3,000 free/mo, $0.90/1K overage) or Amazon SES ($0.10/1,000 flat) badly undercut SendGrid's $19.95 Essentials floor. Community and G2 reviews consistently flag slow support-ticket turnaround and inconsistent inbox placement as the recurring gripe — not code quality, deliverability trust. Known weakness: Recurring G2/community complaints cite inconsistent deliverability and slow support-ticket response, and the abrupt May 2025 removal of the permanent free tier (replaced by a 60-day/100-per-day trial) blindsided developers mid-project.

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Learning Resources

📄
SendGrid v3 API Reference
docs
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📝
Getting Started with the SendGrid API
tutorial
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📄
Twilio SendGrid Developer Documentation
docs
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📄
SendGrid Pricing
docs
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Related Tools

SmtpEmail DeliverabilityTwilioDkimWebhooks

Alternatives to SendGrid

MailgunPostmarkResendAmazon Ses

Other Transactional Email

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.NET is a free, cross-platform, open-source developer platform for building many types of applications, including web, mobile, desktop, games, IoT, and cloud services. It provides a unified runtime and framework with libraries for common tasks, supporting multiple programming languages like C#, F#, and Visual Basic. The platform includes tools for development, debugging, and deployment, enabling developers to create high-performance, scalable applications.
.NET
.NET is a free, cross-platform, open-source developer platform for building many types of applications, including web, mobile, desktop, games, IoT, and cloud services. It provides a unified runtime and framework with extensive libraries and tools, supporting multiple programming languages like C#, F#, and Visual Basic. The platform includes the .NET runtime (Common Language Runtime or CLR), the .NET SDK, and frameworks such as ASP.NET Core for web development and Entity Framework for data access.
.NET
.NET is a free, cross-platform, open-source developer platform for building many types of applications, including web, mobile, desktop, games, IoT, and cloud services. It provides a unified runtime and framework with libraries for common tasks, supporting multiple programming languages like C#, F#, and Visual Basic. The platform includes tools for development, debugging, and deployment across various operating systems.
.NET
.NET is a free, cross-platform, open-source developer platform for building many types of applications, including web, mobile, desktop, games, IoT, and cloud services. It provides a unified runtime and framework with languages like C#, F#, and Visual Basic, along with extensive libraries and tools for development, testing, and deployment.
.NET
.NET is a free, cross-platform, open-source developer platform for building many types of applications, including web, mobile, desktop, games, IoT, and cloud services. It provides a unified runtime and framework with multiple language support, primarily C#, F#, and Visual Basic, along with extensive libraries and tools for development, testing, and deployment.
.NET
.NET is a free, cross-platform, open-source developer platform for building many types of applications, including web, mobile, desktop, games, IoT, and cloud services. It provides a unified runtime (CLR) and framework libraries that support multiple programming languages like C#, F#, and Visual Basic. The platform includes tools, libraries, and languages that enable developers to create high-performance, scalable applications.