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Alternatives

AgentMail alternative for AI agents: AgentiSend compared (2026)

Is AgentiSend an AgentMail alternative?

Yes, for outbound mail an agent sends under a budget. No, when the job is an inbox per agent. 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.

Pick AgentMail when the job is an inbox and an identity per agent, a SOC 2 report on the $200 plan, or an EU region on Enterprise; pick AgentiSend when the risk is outbound and you want a per-key budget, a kill switch and a published enforcement ladder. The figures below are from AgentMail pages fetched on 28 September 2026 and from this product's pricing table and published API.

What mattersAgentiSendAgentMail
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).Plan caps are on the pricing page (100 a day on Free, 1,000 a day on Developer). A per-key send budget is not.
What a refusal tells youEvery refused request carries code, message, fix (the call that repairs it), docs_url and retryable.A fix field is not documented on the pricing page or the idempotency guide.
A retry never sends twiceIdempotency-Key is accepted on every endpoint that changes something and remembered for 7 days.Idempotency-Key on send expires 24 hours after the send completes. Create calls can also take a client_id, and a repeat returns the first resource.
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.Storage is sold in gigabytes: 3 GB on Free and 10 GB on Developer. The pricing page links a message-expiry document and does not state a retention period in days.

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