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Cooper Email is an email API that gives each AI agent its own inbox. Free is $0 and includes 5 inboxes and 5,000 emails a month.

Retrieved 2026-11-05

Cooper Email vs Resend

Resend is a transactional email API. Cooper is an inbox an agent can send from, receive into, and search.

Resend inbound delivers events to a webhook. Cooper stores the message and indexes extracted_text.

Use Resend when the job is application mail at high volume. Use Cooper when the agent needs its own address and a mailbox.

Sources: Resend pricing

ResendCooper Email
JobTransactional and marketing sendDedicated inbox per agent, send and receive, account search
Free$0 · 3,000 emails/month · 100 emails/day · 3 domains · 30-day data retention$0 · 5 inboxes · 5,000 emails/month · 1 custom domain
Paid entryPro $20/month for 50,000 emails, or $35/month for 100,000. Overage $0.90 / 1,000. Scale starts at $90/month for 100,000.Starter $12/month · 25 inboxes · 25,000 emails/month · 15 custom domains
InboundInbound emails are listed as included. Stored searchable threads are not the product.Stored messages, webhooks (message.received), and GET /api/v1/search
ComplianceResend lists SOC 2 Type II on all plansNo SOC 2 report
  • Cooper can use Resend as an outbound provider. That does not turn Cooper into Resend, or Resend into an agent inbox.
  • Marketing-email contact prices on Resend are a different product and are not compared row-by-row here.

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