A SendGrid alternative with a cleaner API, no lock-in, and native AI tooling
Send transactional email with a single request, keep templates out of your code, and never get locked to one provider. Wire it up straight from your AI coding agent — and add SMS and push from the same API when you need them.
- Send in one request
- No provider lock-in
- Email · SMS · Push
import { SenderKit } from "@senderkit/sdk";
const sk = new SenderKit({ apiKey: process.env.SENDERKIT_API_KEY! });
await sk.send({
template: "welcome_email",
to: user.email,
vars: { firstName: user.firstName },
});
Why teams look for a SendGrid alternative
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Thanks for signing up — here's how to get started…
Your receipt from Acme
One request to send
POST a template, a recipient, and your variables to /v1/send. Typed SDKs for TypeScript, Python, and PHP — or call the REST API from anywhere.
Talk to it from your AI agent
A hosted MCP server connects SenderKit to agents like Claude Code and Codex — check delivery logs, create templates, and send test messages right from your editor.
No provider lock-in
Route through Amazon SES, Postmark, SMTP, and a growing list of providers — switch delivery with a config change, never a rewrite.
Templates out of your code
Edit and roll back copy in a dashboard without a deploy. The same templates work across email, SMS, and push.
SenderKit vs SendGrid, side by side
| SenderKit | SendGrid | |
|---|---|---|
| Developer experience | One request to /v1/send, typed SDKs (TS, Python, PHP), and a CLI | REST API and SDKs |
| AI-agent setup | MCP server + a portable skill — Claude Code, Cursor, and Codex wire it up | SDKs and docs; no agent-native setup |
| Provider lock-in | Bring your own — route via SES, Postmark, SendGrid, SMTP, and more | Sends on SendGrid's infrastructure only |
| Template management | Dashboard editor, versioning, rollback — edit without a deploy | Dynamic templates edited in the SendGrid UI or code |
| Channels | Email, SMS, push, web-push — one API | Email (SMS via separate Twilio products) |
| Pricing | Flat tiers, no overage surprises — free to start | Tiered; no permanent free plan |
Moving from SendGrid
Two ways to move — pick one. Either way your send code becomes a single senderkit.send() call, and you can switch between them later without a rewrite.
Keep your SendGrid delivery
EASIESTLowest risk — no DNS changes, nothing to re-warm.
- 1Connect your existing SendGrid API key as a provider. SenderKit sends through SendGrid, so your deliverability, IPs, and domain authentication stay exactly as they are.
- 2Swap your send calls to senderkit.send() — point your AI agent (Claude Code, Cursor, Codex) at SenderKit's skill, or use the SDK.
Switch to built-in sending
No provider account — just connect your domain.
- 1Add your domain and drop in the SPF, DKIM, and DMARC records SenderKit generates, then verify.
- 2Swap your send calls to senderkit.send() — the same call, now on SenderKit's managed infrastructure.
Templates come along either way: paste your existing HTML to start, then manage and version them in the dashboard whenever you like.
Frequently asked questions
Is SenderKit a drop-in SendGrid replacement?
For transactional email — password resets, receipts, magic links, notifications — yes. For SendGrid's Marketing Campaigns product (large promotional sends with audiences and segmentation), no; SenderKit is focused on transactional messaging.
Transactional email use caseCan I set SenderKit up with Claude Code, Cursor, or Codex?
Yes. SenderKit ships a portable integration skill that AI coding agents like Claude Code, Cursor, and Codex use to add SenderKit to your app, plus a hosted MCP server so an agent can create templates and send test messages at runtime. Prefer to do it by hand? Use the typed SDKs or the REST API.
Can I keep using SendGrid's delivery — or switch later?
Yes. SenderKit can route through SendGrid, Amazon SES, Postmark, SMTP, and a growing list of providers, so you can adopt the API and template management while keeping your existing delivery — and switch providers later with a config change, not a rewrite.
How delivery & channels workHow much does SenderKit cost?
It starts free — 500 messages a month, no credit card — with flat tiers above that: $5/mo Starter (5,000 messages) and $19/mo Pro (50,000). See the pricing page for current tiers.
See pricingSee the full picture on email, transactional email, email authentication, and pricing.
Try SenderKit as your SendGrid alternative
Email, SMS, and push from one API, with templates out of your codebase. Start free, go to production from $5/mo — no credit card.
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