Resend alternative for AI agents: AgentiSend compared (2026)
Is AgentiSend a Resend alternative?
Is AgentiSend a Resend alternative? Yes, for transactional email sent through an API when an agent holds the key. It is not a replacement for React Email. 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 Resend when you want React Email, inbound mail on every plan, a SOC 2 Type II report, or a dedicated IP with a published price of $30 a month; pick AgentiSend when an agent holds the key and you want the budget, the kill switch and a free plan that does not expire. The figures below are from Resend pages fetched on 28 September 2026 and from this product's pricing table and published API.
| What matters | AgentiSend | Resend |
|---|---|---|
| A spending limit per key | Every 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 on every plan. It does not list a send budget per key. |
| What a refusal tells you | Every refused request carries code, message, fix (the call that repairs it), docs_url and retryable. | The rate-limit page names daily_quota_exceeded and monthly_quota_exceeded. A fix field naming the next call is not on that page. |
| A retry never sends twice | Idempotency-Key is accepted on every endpoint that changes something and remembered for 7 days. | Idempotency-Key is supported on POST /emails and POST /emails/batch, kept for 24 hours. Keys can be up to 256 characters. |
| How long the log keeps a message | 7 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. | The Free plan lists 30-day data retention. Enterprise says flexible data retention. The other plan bullets on the pricing page do not state a retention period. |
Read further
- AgentiSend vs Resend: all 11 rows, with a source for each.
- How a migration from Resend actually goes
- Pricing: every plan and limit.
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