Marketing & growth

SendGrid

A cloud-based email delivery service (by Twilio) for sending transactional and marketing email at scale via API or SMTP, with deliverability and analytics tooling.

Visit SendGrid →

How and why we use SendGrid at AI4NTP

The bulk-email service behind Ian’s most-repeated security lesson: in Episode 003 he shared how a single exposed SendGrid key sent 127,000 emails from his address. We use it to send at scale, and we guard and rotate the keys.

SendGrid FAQ

Is SendGrid free?

Yes, SendGrid has a free tier. Free tier with limited daily sends; usage-based paid plans.

How much does SendGrid cost?

Free tier with limited daily sends; usage-based paid plans.

What did AI4NTP use SendGrid for?

Ian Kilpatrick used it in Episode 003 to sent bulk email at scale; the source of Ian’s API-key security lesson.

SendGrid at a glance

CategoryMarketing & growth
PricingFree tier with limited daily sends; usage-based paid plans.
Free tierYes
Used live inEpisode 003
Operator(s)Ian Kilpatrick
Websitesendgrid.com

See how we used SendGrid live at AI4NTP

Episode 003 · Ian Kilpatrick
Sent bulk email at scale; the source of Ian’s API-key security lesson.
Show notes →

Want to get more out of SendGrid?

See tools like SendGrid set up live, step by step, on AI4NTP, or get hands-on help putting it to work.

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Last updated 2026-06-11