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Alternatives

SendGrid alternative for AI agents: AgentiSend compared (2026)

Is AgentiSend a SendGrid 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 SendGrid when you want a dedicated IP included on Pro, or 7 days of searchable activity on that plan; pick AgentiSend when you want a free plan that does not expire and a send budget on every key. The figures below are from Twilio SendGrid pages fetched on 28 September 2026 and from this product's pricing table and published API.

What mattersAgentiSendSendGrid
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).The pricing page lists API key permissions. It does not list a send budget per key.
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 mail-send reference.
A retry never sends twiceIdempotency-Key is accepted on every endpoint that changes something and remembered for 7 days.The mail-send reference does not document an idempotency key.
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.Searchable email activity is 3 days on the 60-day column and on Essentials, and 7 days on Pro and Premier. More history is an add-on.

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