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SendGrid is an email delivery platform, now part of Twilio, built to send large volumes of email reliably. It is not a web host. You do not build a website here. What it handles is the sending, whether that is password resets and receipts from your app or a newsletter to thousands of subscribers. This review explains what the API does, why deliverability matters and who should use it.
What SendGrid does
There are two sides to SendGrid. The email API lets developers send transactional messages from their applications, things like sign up confirmations, alerts and receipts, through a simple integration. The marketing side lets you build and send campaigns to lists, with templates and basic analytics. Both run on the same infrastructure whose whole job is getting mail into inboxes rather than spam folders. It takes the messy work of running your own mail server off your plate.
Why deliverability matters
Sending email at scale is harder than it looks. Mailbox providers are strict, and messages from an unknown server often land in spam or get blocked. SendGrid maintains sender reputation, handles authentication records and monitors bounces so your important mail actually arrives. For a business that relies on password resets or order confirmations reaching customers, that reliability is the core value. Poor deliverability quietly costs sales and frustrates users.
Pricing and integration
SendGrid offers a free tier with a limited daily send, which is handy for small apps and testing, then paid plans that scale with volume. Developers get clear documentation, libraries for common languages and webhooks for tracking events like opens and clicks. You point your app or site at SendGrid, verify your domain with a few DNS records and start sending. It sits alongside your web host, which runs the site, while SendGrid handles the outbound mail.
Who it fits
SendGrid fits developers building apps that send transactional email, businesses running newsletters and any site that needs reliable delivery at volume. If you only send a handful of personal emails, a normal mailbox is enough and this is overkill. For anyone whose app or store depends on email reaching customers, a dedicated delivery service is worth it. Treat it as a complement to your host, not a replacement.
For background on the topic, see Wikipedia, and compare more options in our hosting reviews.
Frequently Asked Questions
Is SendGrid a web host?
No. SendGrid is an email delivery platform. It sends transactional and marketing email at scale but does not host websites. You still need a web host for your site, with SendGrid handling the outbound mail.
What is transactional email?
It is automated mail triggered by user actions, such as password resets, sign up confirmations, receipts and alerts. SendGrid’s API lets your app send these reliably so they reach the inbox rather than the spam folder.
Does SendGrid have a free plan?
Yes. There is a free tier with a limited daily sending amount, good for small apps and testing. Paid plans scale with your monthly volume and add features for larger senders and marketing campaigns.
Who should use SendGrid?
Developers sending app email, businesses running newsletters and any site needing reliable delivery at volume. If you only send occasional personal mail, a standard mailbox is enough and a dedicated platform is unnecessary.