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AgentiSend vs SendGrid
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.
Moving across? How a migration from SendGrid actually goes.
| What matters | AgentiSend | SendGrid |
|---|---|---|
| Trying it before paying | 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. | The Email API pricing page has a $0 column that lasts 60 days and allows 100 emails a day, and says you cannot exceed that. The same page's FAQ still describes a free SMTP plan at 100 a day without the 60-day limit. The changelog dated 28 May 2025 says the free Email API and free Marketing Campaigns plans were retired, with a 60-day transition for accounts already on them. |
| Price at 50,000 emails a month | $9 a month on Starter, which covers 30,000 emails, so $0.30 per 1,000 at the inclusion. | Essentials starts at $19.95 a month. Pro starts at $89.95 a month and includes one dedicated IP. Premier is custom. |
| 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. It does not list a send budget per key. |
| A retry never sends twice | Idempotency-Key is accepted on every endpoint that changes something and remembered for 7 days. | The mail-send reference does not document an idempotency key. |
| What a refusal tells you | Every 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. |
| 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. | 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. |
| What the model can call | A hosted MCP server with 82 MCP tools (44 listed by default, the rest named by list_more_tools). An agent gets the same budget and kill switch over MCP as over the API. | The Twilio MCP server at mcp.twilio.com/docs exposes two tools, twilio__search and twilio__retrieve. It searches public API documentation. It does not authenticate and it does not send mail. |
| A dedicated address | Dedicated IP on request. Once one is assigned, the published ramp is 20% of volume to day 7, 40% to day 14, 60% to day 21, 80% to day 28, then all of it, on GET /dedicated-ips/ramp. | Pro and Premier include one dedicated IP, and more can be purchased. The 60-day column and Essentials do not include one. |
| Where account data can sit | Not offered. Customer data is processed in the United States. | The pricing page lists Data Residency (EU) as a privacy row. The fetched table does not say which plans include it, so this row does not guess. |
Sources
- Trying it before paying. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/en-us/products/email-api/pricing and https://www.twilio.com/en-us/changelog/changes-coming-to-sendgrid-s-free-plans (captured 2026-09-28).
- Price at 50,000 emails a month. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/en-us/products/email-api/pricing (captured 2026-09-28).
- A spending limit per key. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/en-us/products/email-api/pricing (captured 2026-09-28).
- A retry never sends twice. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/docs/sendgrid/api-reference/mail-send/mail-send (captured 2026-09-28).
- What a refusal tells you. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/docs/sendgrid/api-reference/mail-send/mail-send (captured 2026-09-28).
- How long the log keeps a message. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/en-us/products/email-api/pricing (captured 2026-09-28).
- What the model can call. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/docs/ai/mcp (captured 2026-09-28).
- A dedicated address. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/en-us/products/email-api/pricing (captured 2026-09-28).
- Where account data can sit. Ours: the published API, /pricing and /security. Theirs: https://www.twilio.com/en-us/products/email-api/pricing (captured 2026-09-28).