Skip to content

Alternatives

Mailgun alternative for AI agents: AgentiSend compared (2026)

Is AgentiSend a Mailgun alternative?

Yes, for transactional email an agent sends through an API. A Free plan that does not expire: 1,000 emails a month, 100 a day, 3 domains, no card. Then plans from $9 a month (Starter, 30,000 emails). No plan daily cap; delivery paced per inbox provider. Or 20% off paid yearly. It is not a replacement for a product that is ahead on the rows marked in the other column.

Pick Mailgun when you need to keep data in the EU, want inbound routes on the free plan, or want a dedicated IP included at 100,000 emails; pick AgentiSend when an agent holds the key and you want a per-key budget and a kill switch. The figures below are from Mailgun pages fetched on 28 September 2026 and from this product's pricing table and published API.

What mattersAgentiSendMailgun
A spending limit per keyEvery key is created with a send budget. The send path refuses with agent_budget_exceeded when it is spent, and a key cannot raise its own. The plan inclusion is a second ceiling (plan_limit_reached).A per-key send budget is not on the pricing page. Free and Basic list 2 API keys.
What a refusal tells youEvery refused request carries code, message, fix (the call that repairs it), docs_url and retryable.A fix field naming the next call is not on the pricing page or the webhook-signing page.
A retry never sends twiceIdempotency-Key is accepted on every endpoint that changes something and remembered for 7 days.An idempotency key is not documented on the pricing page or the webhook-signing page.
How long the log keeps a message7 days on Free, 30 on Starter, 90 on Pro, 180 on Scale. It is part of the plan and there is no add-on to buy.Log retention is 1 day on Free and Basic, 5 days on Foundation, and 30 days on Scale. Scale lists message retention up to 7 days.

Read further