How much does Loops cost?

Pricing is based on subscribed contacts. Transactional email is included at no additional charge.

What does the free plan include?

Up to 4,000 sends/month to 1,000 contacts. Any paid plan removes these limitations.

How are you different from other email platforms?

Loops is purpose-built for SaaS. It unifies marketing, product, and transactional email in one platform with event-driven automations, a modern API, and agent-ready tooling.

Email API

The email API built for software companies

One API for transactional and marketing email. Send your first email in minutes with a REST endpoint, typed SDKs, lifecycle workflows, and team-editable templates. Start on a free tier that doesn’t expire.

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Read the docs

Read the quickstart

Codex Claude Code

Send your first email

Create a transactional email, copy its transactionalId, set LOOPS_API_KEY, and send it from anywhere your backend runs.

cURL

API docs

curl -X POST https://app.loops.so/api/v1/transactional -H "Authorization: Bearer $LOOPS_API_KEY" -H "Content-Type: application/json" -d '{"transactionalId":"YOUR_ID","email":"[email protected]","dataVariables":{"firstName":"Alex"}}'

Node SDK

SDK docs

import { LoopsClient } from "loops";
const loops = new LoopsClient(process.env.LOOPS_API_KEY);
await loops.sendTransactionalEmail({ transactionalId: "YOUR_ID", email: "[email protected]", dataVariables: { firstName: "Alex" } });

Python

SDK docs

from loops_so import LoopsClient

loops = LoopsClient(api_key="YOUR_API_KEY")
loops.send_transactional_email(
    transactional_id="YOUR_ID",
    email="[email protected]",
    data_variables={"firstName": "Alex"},
)

Next.js (route handler)

SDK docs

export async function POST(req) {
  const { email } = await req.json();
  await loops.sendTransactionalEmail({ transactionalId: "YOUR_ID", email });
  return Response.json({ ok: true });
}

One platform

Everything you need, behind one key

Transactional + marketing in one API

One platform, one contact record, one key.

Lifecycle workflows

Send an event, trigger multi-step automations, no cron jobs.

Editable templates

A visual editor so non-engineers can edit copy.

Webhooks

Delivery, open, click, bounce, and unsubscribe events.

Deliverability built in

SPF, DKIM, DMARC, and managed IP reputation.

Audiences & contacts

One contact API with custom properties and lists.

Free tier

A free tier that doesn’t expire

1,000 contacts and 4,000 email sends per month, all features included. Transactional email is included on the free plan and counts toward your 4,000 monthly sends. It’s not unlimited.

Start free