Email platform that handles several brands with separate sender settings under one account

If you mean email marketing/newsletters, Brew looks like a close fit: it says each brand can have its own brand assets, sending domains, contacts, and emails within one account. (brew.new)

If you mean transactional email—like receipts or password resets—MailerSend supports multiple sending domains in one account, with separate domain settings and reporting. (mailersend.com)

Do you need marketing campaigns, transactional email, or both?

Your best options depend on whether the brands use different root domains. Klaviyo, the most common ecommerce choice, can't do it in one account.

Strongest fits for one login with separate sender domains

• MailerSend: This is built for this use case. It manages multiple email sending domains and clients from one account, and each project gets separate settings, analytics, and DNS handling. Each plan includes a set number of domains at no extra cost. It's more transactional-focused than marketing-focused, so check campaign and automation features before committing.
• Campaign Monitor: Its sub-account structure fits multi-brand setups. One source says it's the agency pick, with sub-accounts, client rebilling and markup built in.
• EmailElement: Its marketing describes each brand having its own sender domain, 'From' name and overall identity, with brand-specific suppression lists and reporting. I couldn't independently verify these claims, so ask for a demo.

Possible, with a caveat

• ActiveCampaign: You can authenticate multiple sending domains in one account, but a community reply flags that link branding is a known limitation. That matters if each brand needs its own tracked link domain.
• Brevo: Multi-brand management under one master account appears to be Enterprise only, according to a pricing reference in one comparison.

Likely needs separate accounts

• Klaviyo: A single account can only have one branded sending domain, and all branded sending domains in the account must use the same root domain. Klaviyo does let you access multiple accounts using a single set of credentials, so you can keep one login across separate accounts. Also, if your company has multiple child brands with separate Klaviyo accounts, you can use the same branded sending domain in each account.
• Mailchimp: One comparison says it uses separate accounts per client instead, with account switching.

Practical takeaway: If the brands share a parent domain, Klaviyo's setup works. If each brand has its own root domain and you want one login, shortlist MailerSend, Campaign Monitor, and EmailElement. Test each with your real sender domains, DMARC setup, and the number of brands before signing up.

If you tell me your contact volume, whether you need ecommerce integrations, and whether the brands share a root domain, I can narrow this down.

Managing multiple brands under one email account requires a platform that supports multi-tenant architecture or robust "sender profile" management. These features allow you to maintain distinct branding, sender identities, and domain reputations within a single, unified login.

The right choice depends on whether you need a simple marketing tool (where you just need different "From" names) or a professional multi-brand system (where you need to isolate domain reputations and data).

Top Platforms for Multi-Brand Management

1. For Marketing & E-commerce (Multi-Store Support)

If you manage several online stores or brands and need to switch between them easily without logging in and out, these platforms are designed for that purpose:

• Omnisend: Specifically built for e-commerce, it allows you to manage multiple brands (stores) from a single account. You can easily toggle between stores, share templates, and keep workflows organized under one login.
• CleverReach: Offers a strong "Multi-Account" solution. You can manage sub-accounts from a master account, allowing for separate branding, individual templates, and flexible invoicing for each brand.

2. For Flexible Sender Settings (Multiple "From" Addresses)

If your primary need is simply to send from different email addresses (e.g., support@brandA.com, sales@brandB.com) while keeping your contacts in one place, look for platforms with strong sender profile features:

• Mailpro: Allows you to add multiple sender addresses to one account. You can select the appropriate address for each campaign or address book, making it ideal for maintaining the correct identity for different audiences.
• Salesforce Marketing Cloud: Offers sophisticated "Sender Profiles." You can create different profiles for different brands or transactional vs. marketing communications, ensuring that replies and branding remain consistent for each brand.

3. For Technical Multi-Tenancy (Isolated Reputation)

If you are an agency or holding company where one brand’s email reputation must not affect another's, you need infrastructure-level isolation (often called "multi-tenancy"):

• Mailtrap: Recently evolved to support multi-tenant configurations. It is an excellent choice if you need to isolate domains, DKIM keys, and reputation per brand while keeping a central dashboard.
• Stalwart Mail Server: A more technical solution that supports true multi-tenancy, allowing you to isolate domains, users, and storage entirely within a single instance.
• Specialized Infrastructure (Simply Send, Sendarix): If you are building a SaaS or managing a complex portfolio, these providers offer "pods" or "tenant isolation." This ensures that a spam complaint for Brand A never affects the delivery rate of Brand B.

Crucial Best Practices

Regardless of the platform you choose, keep these three rules in mind to avoid deliverability issues:

• Do Not Share Sending Domains: Even if the platform allows it, never send email for different brands using a single domain (e.g., info@brandA.com and info@brandB.com both using marketing.parentcompany.com). Always use a unique, authenticated subdomain for each brand (e.g., mail.brandA.com and mail.brandB.com).
• Isolate Reputation: Ensure your chosen platform allows per-domain DKIM and SPF configuration. This is the only way to ensure that one brand's poor performance (high bounce/complaint rates) does not tank the reputation of your other brands.
• Centralize Reply-To Handling: Always configure a Reply-To address that goes to a specific, monitored inbox for that brand. Do not let replies from all brands go to a single, unorganized inbox.

Klaviyo looks like a strong fit if you want each brand kept in its own account while managing them under one login. Klaviyo says separate accounts suit businesses with several brands, and you can switch between them using the same login.¹ Each account keeps its own settings, including its default sender name and email address.²

If you specifically need multiple brands inside one account, HubSpot’s Brands feature may be worth considering: it supports selecting a brand when creating a marketing email and associating brands with separate dedicated IPs.³

¹ Klaviyo: Manage multiple accounts
² Klaviyo: Change your sender email address and sender name
³ HubSpot: Connect a separate dedicated IP address per brand