HTML version: https://cooperemail.com/compare/mailgun

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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](/pricing).

Retrieved 2026-09-27

# Cooper Email vs Mailgun

Mailgun is an email delivery API with inbound routes. Cooper is an agent inbox that stores and searches mail.

Mailgun’s free plan is a daily send cap with short log retention. Cooper Free is a monthly inbox allowance.

Sources: [Mailgun pricing](https://www.mailgun.com/pricing/)

|  | [Mailgun](https://www.mailgun.com/pricing/) | [Cooper Email](/pricing) |
| --- | --- | --- |
| Free | [$0 · 100 emails/day · 1 custom sending domain · 1 inbound route · 1 day log retention](https://www.mailgun.com/pricing/) | [$0 · 5 inboxes · 5,000 emails/month · 1 custom domain · mail kept until the account holder asks for deletion](/pricing) |
| Basic | [Starting at $15/month · 10,000 emails/month · 1 custom domain · 5 inbound routes · overage from $1.80 / 1,000](https://www.mailgun.com/pricing/) | [Starter $12/month · 25 inboxes · 25,000 emails/month · 15 custom domains](/pricing) |
| Foundation | [Free for 1 month, then $35/month · 50,000 emails/month · 1,000 custom sending domains · overage from $1.30 / 1,000](https://www.mailgun.com/pricing/) | [Pro $99/month · 300 inboxes · 250,000 emails/month · 200 custom domains](/pricing) |
| Scale | [Free for 1 month, then $90/month · 100,000 emails/month · overage from $1.10 / 1,000](https://www.mailgun.com/pricing/) | [Pro stays $99/month through 250,000 emails. Extra email is $1 per 1,000 with POST /api/v1/billing/addons {"email_packs":N}](/pricing) |
| Stored inbox | [Log retention from 1 to 30 days depending on plan. Inbound routes forward mail.](https://www.mailgun.com/pricing/) | [Messages stored for the account, searchable, with message.received webhooks](/pricing) |

- Mailgun Enterprise is custom. Dedicated IP prices are on Mailgun’s page and are not a Cooper feature.
- Cooper does not offer Mailgun’s validation product or send-time optimization.

[All comparisons](/compare) · [Pricing](/pricing) · [AgentMail alternatives](/alternatives/agentmail) · [FAQ](/faq)