Email Marketing Software for Agencies Running Client Email Under Your Brand
Stop juggling a separate login for every client. Interspire Email Marketer runs every client from one self-hosted installation, under your agency’s brand.
One install. Client accounts. Your brand.
One Install for Every Client
Each client or brand gets its own isolated workspace.
- Separate accounts: each with its own login, lists, campaigns, templates, and reports
- One place to work: your team runs the portfolio from one install instead of separate SaaS subscriptions
- Central control: administrators manage users, permissions, sending limits, and settings
Deliver It Under Your Brand
Replace Interspire branding with your logo, colors, interface text, and system messages. Then choose how each client works with you:
- Full access: clients log in and work in their own account
- Limited access: grant only what they need, such as statistics without send or edit rights
- Done for them: your team sends on their behalf, and clients never need a login
“It can integrate easily with other products that we or our clients have and can be white-labelled… Among all the tools we have considered for email marketing Interspire, by far, is the best!”
Sumeru K., Doxim
Control What Each Login Can Do
Permissions follow how your team and clients actually work.
- Fine-grained permissions: restrict sending, templates, imports, lists, and settings for staff, freelancers, and clients
- Limits and SMTP per client: hourly, monthly, or total caps, with shared agency SMTP, per-client SMTP, or client-owned SMTP
- Per-client reporting: opens, clicks, bounces, and unsubscribes without exposing other clients’ data
Grow Clients Without Growing Fees
Hosted platforms often charge more as contacts grow across every client.
- No per-contact or per-email charges: costs depend on licensing, infrastructure, and sending
- Your hosting: your server, private cloud, or an agreed managed environment
- Your data: years of client history stay under your control, not in a vendor account
Common Questions
How is this different from Mailchimp or Klaviyo for agency work?
Those platforms usually charge more as each client’s list grows. Interspire runs your whole portfolio on one install with your branding, and costs stay tied to licensing, infrastructure, and sending.
Shared install or dedicated per large client?
Most agencies start with one shared install and separate client accounts. Large clients that need isolation can have a dedicated, separately licensed install.
Who owns deliverability?
You or the client own sending domains, authentication, and the SMTP/ESP path. Interspire connects to whatever infrastructure you choose.
What if we sell email marketing as a product rather than a service?
That is the hosting provider model. See Hosting Providers & MSPs.
Scale Client Email Without Scaling SaaS Fees
Tell us how many clients you support, whether they need logins, and how you want to host and send.
See every feature on the Email Marketer product page. Installation, training, priority support, and custom integration are quoted by project scope.