OpenAI API vs Resend

Two Tech stack tools side by side: what each does, what it costs and who it suits.

The verdict Side by side Plans and pricing Who each is for Other options

The verdict

On the data we hold, Resend comes out ahead. Here is why, point by point.

What the data says

Both have an API and an MCP server, so either works with AI employees.
In our Tech stack ranking, Resend places 34 and OpenAI API 61 of 72.

Side by side

OpenAI API and Resend compared
At a glance	OpenAI API	Resend
Starts at	Not known yet	$20/mo
Free plan	Not known yet	Yes
API	Yes	Yes
MCP server	Yes	Yes
Links	Visit	Visit

Plans and pricing

OpenAI API

Pricing not in our catalogue yet.

Resend

FreeFree forever: 3,000 emails per month (100 per day), 3 domains, 1 webhook endpoint.Free
Pro50,000 emails per month, then $0.90 per 1,000 extra; 10 domains and no daily limit.$20/mo
Scale100,000 emails per month, then $0.90 per 1,000 extra; 1,000 domains and a dedicated Slack channel.$90/mo

Prices as the vendors list them. They change often; the final price is on their sites.

Who each is for

Choose OpenAI API if…

A product or operations team with a developer that wants to build its own AI steps, such as drafting, classifying or voice, and prefers paying by usage over buying seats.

Visit Read the review

Choose Resend if…

Software teams that want to send transactional email, such as sign-ups, receipts and password resets, and some marketing email from their own code, with a clean API and good developer tooling.

Visit Read the review

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