Loops is a marketing email tool for SaaS teams, priced by subscribed contacts, with a transactional endpoint attached and no SMTP. Notix is the other way round: a send API with templates and idempotency keys, an SMTP relay, one-time codes by email or SMS, signed webhooks, and campaigns and journeys on the same suppression list, priced per email: 5,000 a month free, then 50,000 for $15. Teams that chose Loops for its editor should stay; teams that need the transactional side to carry a product will find more of it here.
Loops' pricing page puts Free at 1,000 subscribed contacts and 4,000 emails in any 30-day window, marketing and transactional together, with Loops branding on the mail. Receipts to a growing user base hit the contact cap before the email cap.
Paid plans are priced by subscribed contacts with unlimited sends, and the tier prices are not printed on the pricing page. A transactional workload with many recipients and few marketing contacts pays by the wrong unit.
Loops' docs say transactional email is API only; there is no SMTP host for the parts of a stack that already speak SMTP, no one-time-code endpoint, and no pre-send deliverability check. Webhooks are not stated in its API docs.
Every Loops figure was read from Loops' own pricing page and API docs on 2026-09-13; the date sits under the table. Where a row says a price or fact is not stated, the pages did not state it and this page does not guess.
| Criterion | Loops | Notix |
|---|---|---|
| Free tier | 1,000 subscribed contacts and 4,000 emails in any 30-day window, marketing and transactional together, with Loops branding | 5,000 emails a month, 200 a day, no card, no end date |
| Entry paid plan | Priced by subscribed contacts; tier prices not shown on the pricing page | Pro $15 a month |
| Included on that plan | Unlimited sends on paid plans, up to 1,000 emails a second per team | 50,000 emails, usage past that metered on the same invoice |
| SMTP relay | No; transactional email is API only | Yes, on every plan |
| SDKs | JavaScript/TypeScript, Go, PHP, Ruby | TypeScript, Python, Go, PHP |
| Webhooks | Not stated in the API docs | Yes, signed, for email, contact and domain events |
| OTP / verification API | No | Yes, email and SMS codes |
| Deliverability check before sending | No | Yes, a pre-send check API |
| Billing outside USD | Not stated on the pricing page | USD by card; naira and shillings from a prepaid wallet |
| SLA | Not stated on the pricing page | 99.9% on Pro, credits on the pricing page |
| Prices and limits read from the vendors' own pages: loops.so on 2026-09-13. Notix figures are from its own pricing page. | ||
An editor built for SaaS product email and newsletters, unlimited sends on paid plans at up to 1,000 emails a second per team, and SDKs in JavaScript, Go, PHP and Ruby (Notix has no Ruby client). If the newsletter editor is where your team spends its time, Loops is the right tool and this page is not for you.
Both send a transactional email from a JSON call with a template id and variables, both keep a contact list with subscription status, both have a free plan, and both expect you to verify a sending domain. Loops' billing currency, SLA and webhook support are not stated on its pages, so those rows are left as read.
5,000 emails a month and 200 a day on Free with no branding, then 50,000 for $15 on Pro; the pricing page has the per-unit rate past that.
One call sends a code by email or SMS, one call checks it. Expiry, attempts, rate limits and risk scoring are handled server-side. See OTP email.
smtp.usenotix.dev on 465 or 587 for Supabase, Rails, WordPress and anything else that already speaks SMTP, with the same log and suppression behind it.
Delivery, bounce, complaint, open and click events signed with HMAC-SHA256, retried, and replayable from the console.
Post the message and get back a verdict, a score and the findings that would block a send.
A prepaid wallet in NGN or KES, topped up locally. Pro is charged from the balance each month; no dollar card needed.
The transactional call carries the same idea: a template id, a recipient, variables. Swap the request and the key, verify the domain, and import the audience.
// Loops transactional send over its REST API
const response = await fetch("https://app.loops.so/api/v1/transactional", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.LOOPS_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
transactionalId: "clfq6dinn000yl70fgwwyp82l",
email: "customer@example.com",
dataVariables: { orderId: "48213" },
}),
});
import { Notix } from "notix-js";
const notix = new Notix(process.env.NOTIX_API_KEY);
const { data, error } = await notix.emails.send(
{
from: "receipts@acme.com",
to: "customer@example.com",
templateId: "tpl_receipt_v4",
variables: { orderId: "48213" },
},
{ idempotencyKey: "order-48213-receipt" },
);
# Loops has no SMTP relay (its docs say transactional is API only);
# anything in your stack that already speaks SMTP can point at Notix.
SMTP_HOST=smtp.usenotix.dev
SMTP_PORT=465 # or 587 for STARTTLS
SMTP_USER=notix
SMTP_PASS=<your Notix API key>
Add the SPF, DKIM and DMARC records Notix gives you. They sit beside Loops' records, so both can send while you switch. The quickstart walks through it.
Recreate each transactional email in the Notix editor with the same variable names, then replace the Loops request with notix-js and an idempotency key named after the order or event.
Export the Loops audience as CSV into a Notix contact book (double opt-in is on for imports), and upload bounced and unsubscribed addresses under Suppressions before the first send.
| Emails a month | Loops | Notix |
|---|---|---|
| 3,000 | Free, $0, if you hold under 1,000 subscribed contacts (with Loops branding) | Free, $0 |
| 50,000 | A paid plan priced by subscribed contacts; tier prices not shown on the pricing page | Pro, $15 |
| 100,000 | A paid plan priced by subscribed contacts; unlimited sends | Pro, $15 plus the 50,000 above the allowance, metered on the same invoice |
Loops charges by contacts held, not emails sent, and does not print its tier prices, so the two middle rows compare a quote against a listed number. Notix overage is at the per-unit rate on the pricing page. Loops facts read on 2026-09-13.
Teams in Nigeria and Kenya fund a prepaid wallet in naira or shillings through local payment methods and Pro is charged from that balance each month, so nobody needs a dollar card that clears international charges. SMS to Nigerian and Kenyan numbers is prepaid from the same wallet. The local price per email is on the pricing page when you open it from either country.
Two developer-favourite email tools with different shapes, on free tier, pricing model, SDKs, webhooks and SLA, with Notix in a separate third column.
NotixA free plan with no card, and Pro at $15 a month for 50,000 emails. Only sent volume is metered.
AlternativesSame free tier shape, $5 a month less at 50,000 emails, plus OTP and deliverability APIs and naira or shilling billing.
AlternativesA Customer.io alternative for the transactional side: a send API with templates and idempotency keys, priced per email rather than per profile.
Use casesA welcome sent on sign-up, or a short sequence through a journey, with double opt-in built in for imported lists.
AlternativesHonest switch pages for the email APIs people move away from, with the vendor's own numbers and read dates.
5,000 emails a month on Free. When you outgrow it, Pro is $15 for 50,000, payable by card or from a naira or shilling wallet.