Replyz / Compare / Resend Inboxes
Replyz vs Resend Inboxes
Resend Inboxes adds receiving to Resend's email-sending API. Replyz is built only for agent inboxes: each agent gets its own address, waits for email in one call and reads verification codes in another, with mail stored in the EU.
The short answer
- Choose Replyz if your agents need many inboxes, built-in waiting and code extraction, or EU hosting.
- Choose Resend Inboxes if you already send with Resend and only need a few inboxes on the same account.
Side by side
| Replyz | Resend Inboxes | |
|---|---|---|
| Inboxes included | 100 for 19 € / month (planned) | 3 on every plan |
| Extra inboxes | Included up to 100 | $1 / month each (paid plan, pay-as-you-go) |
| Received email | Within the plan's limits | Counts toward the sending quota |
| Free plan | 7-day sandbox, then a trial | 3 inboxes, 100 emails a day, 30-day retention |
| Wait for an email | One call that waits | Not described on the pricing page |
| Verification codes | Built in (get_verification) | Not described on the pricing page |
| EU hosting | Every plan | Not stated for inboxes |
| Main product | Inboxes for AI agents | Transactional email sending |
Resend details from resend.com/pricing, checked on 6 November 2026. Replyz prices are planned and may change before launch.
Where they differ
Price per inbox
Resend includes 3 inboxes and charges $1 a month for each extra one, so 100 inboxes add about $97 a month on top of the plan. Replyz plans 100 inboxes for 19 €.
Quotas
On Resend, every email an inbox receives counts toward the plan's sending quota. An agent that signs up for many services, or receives a burst of notifications, uses that quota up.
Built for agents
Replyz has an agent skill, a CLI and an MCP server built around waiting for an email and returning the code or link, and a claim flow so the agent can sign up first and its human takes ownership later.
More options: AgentMail alternatives compared.
Frequently asked questions
Is Replyz a Resend Inboxes alternative?
Yes, for agents that need their own inboxes. Resend Inboxes is part of the Resend sending API; Replyz is built only for agent inboxes, with calls to wait for email and read verification codes.
How much does Resend Inboxes cost?
Every Resend plan includes 3 inboxes. More cost 1 dollar each per month on a paid plan with pay-as-you-go enabled. Received email counts toward the plan's transactional email quota.
Does received email count toward a quota?
On Resend, yes: every email sent or received through an inbox counts toward the transactional quota, and the free plan allows 100 emails a day. Replyz plans include receiving within each plan's limits.
When is Resend Inboxes the better choice?
If you already send transactional email with Resend and only need a few inboxes, staying on one provider is simpler.