Best platforms for marketing and transactional email (2026)

The best platform for sending both marketing and transactional email is Brew if you also want one tool to design every email, followed by Loops for SaaS teams, Brevo if you want SMS from the same vendor, Resend for developer-owned email and SendGrid for high transactional volume on dedicated IPs. All five send receipts and campaigns from one vendor; they differ in how they keep the two streams apart, who builds each email and how they charge.

Ranked November 2026. We re-checked each vendor's pricing page and documentation on November 1, 2026. Brew publishes this comparison, and it is a documentation comparison, not a claim of hands-on testing of every platform. Work at Loops, Brevo, Resend or Twilio SendGrid? If anything here is wrong or out of date, email support@brew.new and we will correct it.

A customer forwards you a receipt with the old logo on it, even though this morning's newsletter uses the new branding. Marketing changed its templates last week, but the receipt lives in a different service that someone on the development team has to update.

The setup behind that mistake is common. Different people own different emails, so a routine change turns into a search through tools, templates and application code.

One provider for marketing and transactional email means fewer services to maintain. Brew is our first pick when you also want one way to create every email: its agent designs receipts and launches from the same brand, sends both and runs the automations. Loops, Brevo, Resend and SendGrid split the work in other ways.

Key takeaways

• One account is fine, but avoid one sending identity for everything. Yahoo asks high-volume senders to use different IPs, and preferably different domains, for marketing and transactional mail.
• US law classifies an email by its primary purpose. A receipt becomes commercial under 16 CFR 316.3 when promotion is its primary purpose, judged by the subject line and how much of the body promotes.
• Pricing models differ: credits plus sends (Brew), subscribed contacts (Loops, Resend Marketing), sends (Resend Transactional, SendGrid Email API) and daily limits (Brevo Free).
• List every application email before you move. Support for transactional sending doesn't mean support for every authentication provider's emails.

The platforms at a glance

Rank	Platform	Best for	How the streams are separated	Pricing (checked Nov 1, 2026)
1	Brew	Teams that want one agent to design, send and automate every email	Each sending domain has a purpose: marketing or transactional	7-day free trial; Growth $99/mo with 50,000 sends; Pro $249/mo with 200,000 sends
2	Loops	SaaS teams with a preference center	Transactional API next to campaigns in one account	Free to 1,000 subscribed contacts; Growth from $49/mo, transactional included
3	Brevo	Email plus SMS and WhatsApp from one vendor	Transactional API and SMTP relay next to campaigns	Free 300 emails/day (campaigns and transactional together); Starter from $9/mo
4	Resend	Developers who keep templates in code	Separate transactional and marketing plans	Transactional free to 3,000/mo, Pro from $20/mo; Marketing free to 1,000 contacts, Pro from $40/mo
5	SendGrid	High transactional volume on dedicated IPs	Two products, Email API and Marketing Campaigns, each with its own plan	Email API from $19.95/mo; Marketing Campaigns from $15/mo

1. Brew: one way to create every customer email

In Brew, a transactional email is an automation with a trigger, and the sending domain's purpose sets how Brew handles it. A domain with a transactional purpose drops the unsubscribe requirement and still reaches contacts who unsubscribed from marketing. A marketing-purpose domain keeps the one-click unsubscribe headers. Transactional emails walks through the model and the legal test.

Your backend fires the trigger per event:

POST /v1/automations/triggers/{triggerEventId}/fire
{ "payload": { "email": "ada@example.com", "order_id": "1234" } }

Why it ranks first: Brew is fully agentic, so one agent creates both streams and keeps them consistent. Its agent designs campaigns, newsletters, lifecycle automations and receipts from one brand, so a new receipt and a new launch email start from the same logo. An email you already saved keeps its design until you edit it. The people who maintain both don't start a separate design project for each.

Brew starts with a 7-day free trial of Growth (card required). Growth costs $99 a month with 50,000 sends and 10,000 AI credits, and Pro costs $249 a month with 200,000 sends. Live sends need a verified domain you own. See pricing.

List the application emails you need before you plan a move. Brew's Supabase integration starts automations from changes to auth.users, but it does not send Supabase Auth's own confirmation, magic-link or reset emails. Those stay on your SMTP provider.

2. Loops: marketing and transactional for SaaS teams

Loops puts campaigns, workflows and transactional email in one account for software companies. Paid plans are priced by subscribed contacts, with transactional sending included: Free covers up to 1,000 subscribed contacts and 4,000 sends per rolling 30 days, and Growth starts at $49 a month for up to 5,000 subscribed contacts.

Why it ranks second: it is the closest to one product for both streams, with one contact list and transactional sending on every paid plan, but it has no AI that designs emails, so you build each one in its editor or a coding agent writes it in LMX.

Bring an existing receipt and newsletter into the trial and check how the contact and audience settings apply to each. Work this out before you move a live list, especially if customers choose which marketing emails they get.

Choose it if your readers choose between mailing lists in a preference center, or you want Supabase Auth email from the same tool.

See how it compares: Brew vs Loops.

3. Brevo: campaigns plus API and SMTP sending

Brevo includes transactional email on every plan, through its REST API or SMTP relay. Its Free plan allows 300 emails a day, campaigns and transactional combined, once Brevo approves the account; paid plans start with Starter. Brevo also sells SMS, WhatsApp and a CRM.

Why it ranks third: every plan includes transactional email over API and SMTP, but its strength is breadth across channels rather than one way to create every email.

Run a regular campaign next to an email your application triggers, and confirm the people responsible can trace what happened to each send. Include an unsubscribed marketing contact in the test.

Choose it if you want SMS or WhatsApp from the same vendor as your email.

See how it compares: Brew vs Brevo.

4. Resend: for teams whose developers own email

Resend keeps the two sides on separate plans. Transactional is free up to 3,000 emails a month (100 a day), and Pro starts at $20 a month for 50,000 emails. Marketing is free up to 1,000 contacts, and its Pro plan starts at $40 a month for 5,000 contacts. Broadcasts cover campaigns, and Automations cover triggered sequences, with custom event triggers, branches, waits and a view of every run.

Have the engineer and the marketer work on the same campaign during the trial. The engineer checks the integration, and the marketer tries the copy changes and audience work that come up after launch. That shows whether routine updates stay routine or turn into requests for developer time.

Why it ranks fourth: both streams are available, but on two plans billed separately, and its transactional side is built for templates that developers keep in code.

Choose it if your developers want templates as React Email components in the product repo.

See how it compares: Brew vs Resend, or read the best Resend alternatives for teams that also need marketing automation.

5. SendGrid: separate API and campaign products

SendGrid sells Email API and Marketing Campaigns as two products with separate plans. Developers and marketers can each use the part they need from the same provider, but one vendor does not mean one subscription: Email API starts at $19.95 a month and Marketing Campaigns at $15 a month. Email API's Pro and Premier plans include dedicated IPs.

Why it ranks fifth: it is one vendor but two products, so the receipt and the newsletter are bought, built and billed separately.

Have the developer connect a test receipt while the marketer prepares a newsletter. Then check where the templates, recipient settings and delivery data live, and count how many places a routine design change has to be made.

Choose it if you already send high transactional volume through SendGrid's API and want campaigns from the same vendor.

See how it compares: Brew vs SendGrid.

How to keep one account from becoming one reputation

• Use separate sending domains or subdomains, as our email deliverability guide explains, such as mail.example.com for campaigns and notify.example.com for receipts.
• Keep promotions out of transactional templates. Under the FTC's primary-purpose test, a promotional message stays commercial even when an order triggered it.
• Put one-click unsubscribe headers on marketing mail. Gmail requires them for bulk senders and exempts transactional mail.
• Decide who owns messages that fall in between. Trial-ending and abandoned-cart emails are usually promotional.

Move the messages you understand first

List every email you send, with its trigger, its recipients and the system that sends it. Include the less visible ones, such as password resets and billing notices.

Move a small set first. Check what happens after a retry and whether support can find the resulting send. Confirm that unsubscribed contacts stay out of campaigns, and keep each email on exactly one sending system during the move so nobody gets duplicate receipts.

Frequently asked questions

Can I send transactional email to someone who unsubscribed?

Yes, if the message is transactional, such as a password reset or a receipt. In Brew, transactional-purpose domains reach unsubscribed contacts for this reason. For mixed content, apply the primary-purpose test described in the transactional guide.

Is it risky to use one vendor for both?

The risk comes from a shared sending identity. Separate the sending identities and check whether the platform supports separate IPs at your volume. A new subdomain alone does not guarantee independent reputation.

Do I need a developer for transactional email?

Usually yes, to fire events from your backend. Brew, Loops, Resend and SendGrid all document an API call per event. Brew can also start automations from integrations such as Stripe and Shopify without code.

Which platform handles high-volume transactional email?

For millions of transactional messages a month on your own IPs, look at SendGrid, whose Email API Pro and Premier plans include dedicated IPs, or Resend, which sells a dedicated IP for $30 a month on its Scale plan. Brew's Pro plan includes 200,000 sends a month, and Enterprise sets a custom volume.

Which of these platforms also sends SMS?

Brevo sells SMS and WhatsApp next to email, with SMS credits bought separately. Brew sends email only.

Next step

To see the domain split in practice, add a transactional-purpose domain in Brew next to your marketing domain and send a test receipt through a published automation.