Two services with different shapes. Loops is a marketing email product priced by subscribed contacts, with unlimited sends on paid plans, a visual editor and sequences, and transactional email through the same API. Resend is a developer email API priced by sends, with SMTP on every plan, React Email for templates and nine SDK languages. The table reads both from their own pricing pages, with the read date, and puts Notix in a separate third column so you can see where a service that covers both kinds of mail sits against each.
Loops’ figures come from loops.so/pricing, read on 2026-09-13; where that page does not show a figure, the cell says so. Resend’s come from resend.com/pricing, read on 2026-09-12. The Notix column is read from its own pricing page and is there as a third option, not as the subject of this page.
| Criterion | Loops | Resend | Notix |
|---|---|---|---|
| Free tier | 1,000 subscribed contacts and 4,000 emails in any 30-day window, marketing and transactional together, with Loops branding | 3,000 emails a month, 100 a day, 1 domain | 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 $20 a month | 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 a month | 50,000 emails, usage past that metered on the same invoice |
| SMTP relay | No; transactional email is API only | Yes, on every plan | Yes, on every plan |
| SDKs | JavaScript/TypeScript, Go, PHP, Ruby | Node, Python, PHP, Ruby, Go, Java, Laravel, Rust, .NET | TypeScript, Python, Go, PHP |
| Webhooks | Not stated in the API docs | Yes | Yes, signed, for email, contact and domain events |
| OTP / verification API | No | No | Yes, email and SMS codes |
| Deliverability check before sending | No | No | Yes, a pre-send check API |
| Billing outside USD | Not stated on the pricing page | USD by card | USD by card; naira and shillings from a prepaid wallet |
| SLA | Not stated on the pricing page | 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. | |||
Resend’s free plan is 3,000 emails a month, 100 a day, on one domain, and it stays free. Loops’ free plan is 1,000 subscribed contacts and 4,000 emails in any rolling 30-day window, marketing and transactional counted together, with Loops branding on the mail. Counted in emails the two are close; the difference is the contact cap, which a growing list reaches before the email cap does.
This is where the two part. Resend charges for sends: Pro is $20 a month for 50,000 emails, and the number of contacts you hold is not part of the price. Loops charges for subscribed contacts and lets paid plans send without a volume limit, up to 1,000 emails a second per team; its pricing page does not show the tier prices, so this page does not quote them. A product with a small list that sends many transactional messages per contact leans toward Loops’ model; a product with a large list and a modest send rate leans toward Resend’s.
Both are a JSON endpoint. Resend also includes SMTP on every plan, so an existing SMTP integration moves with a credential change. Loops does not offer SMTP; transactional email is API only, and its transactional messages are templates built in the Loops editor and filled with data variables from the call. Resend pairs its API with React Email for templates written as components.
Loops is a marketing product first: a visual editor, contact management, audiences and automated sequences, with transactional mail sharing the account. Resend’s Broadcasts feature sends marketing mail from the same API, but the product’s centre of gravity is transactional sending for developers. If the editor and sequences are what you are buying, Loops is the closer fit.
Resend publishes libraries for Node, Python, PHP, Ruby, Go, Java, Laravel, Rust and .NET, and delivers webhooks for delivery events. Loops publishes JavaScript/TypeScript, Go, PHP and Ruby; its API documentation does not state whether it delivers webhooks, so this page does not claim it does. Neither offers a pre-send deliverability check or an address validation product on the plans read for this table.
Resend bills in US dollars by card; its pricing page does not state an uptime commitment. Loops’ pricing page states neither a billing currency nor an uptime commitment. These are the commitments each vendor publishes, not measurements of either service.
Pick Loops if you are sending a newsletter, a course or a product’s lifecycle mail to a modest list, want a marketing editor and sequences, and are content with API-only transactional mail. Pick Resend if transactional mail is the job, you want SMTP, React Email and the widest SDK set, or your list is large and your send volume is not. The two overlap less than most pairs on this site; the decision is mostly which kind of mail you send more of.
Between the two shapes: a transactional email API with SMTP on every plan, and contact books, campaigns and journeys for marketing mail, on one suppression list and one invoice. A free plan of 5,000 emails a month and 200 a day with no card and no end date, Pro at $15 a month for 50,000 emails with usage past that metered on the same invoice, TypeScript, Python, Go and PHP SDKs, signed webhooks, an OTP and verification API for email and SMS codes, a pre-send deliverability check, and billing in naira or shillings from a prepaid wallet as well as US dollars by card. It has fewer SDK languages than Resend and a simpler marketing editor than Loops.
The full picture against Resend is on Notix vs Resend.
A Loops alternative for teams who need a transactional API with webhooks, OTP codes and SMTP, not only a marketing tool for SaaS.
AlternativesSame free tier shape, $5 a month less at 50,000 emails, plus OTP and deliverability APIs and naira or shilling billing.
ComparePricing, sending API, deliverability tooling, SDKs and billing regions, side by side with a read date.
CompareEvery vendor in one table with read dates, and a straight answer to which transactional email API a startup should pick.
Use casesA welcome sent on sign-up, or a short sequence through a journey, with double opt-in built in for imported lists.
NotixA free plan with no card, and Pro at $15 a month for 50,000 emails. Only sent volume is metered.
Notix is free to try without a card: verify a domain, copy an API key, send one message, and compare it against the two above on your own traffic.