If your agency already handles clients' branding, websites and marketing, email signatures are the obvious add-on service you're probably giving away or doing by hand. Every client company has the same recurring problem: signatures that don't match, don't update, and don't promote anything. Solving it for them — design, deployment, updates, campaign banners — is a tidy recurring service. The obstacle has never been demand. It's the economics of the existing tools.
Most signature platforms charge per user per month, typically $4 to $12 a seat. That model is painful enough for one company; for an agency reselling the service across ten clients, it eats the margin from both sides. Your cost per client floats with their headcount — at a typical $6 a seat, one 25-person client costs you $150/mo before you've charged anything — and every quote becomes a per-seat negotiation instead of a simple packaged service.
FlatSign is being built around the pricing model agencies actually need: one flat price per company, unlimited seats. Your cost for each client is fixed and known in advance, whether they have 8 people or 80. That makes signatures packageable — a line item in a retainer, a setup-plus-management offer, a white-glove add-on — with your margin intact.
The management side is designed for multi-client work: a separate signature setup per client company, your templates and their brand assets kept apart, central deployment to Gmail, Google Workspace and Outlook so client staff never touch HTML, and banner campaigns you can run for clients around their launches and seasons. And it's white-label: clients see your agency's brand on the service, not another tool's logo. The small "Created with" line on free signatures belongs to our free tier, not to your client deliverable.
FlatSign is in beta development now. Agencies on the waitlist get first access, founding pricing locked per company, and a direct line into what we build first — multi-client management is a launch priority, and early agencies will shape it.
Join the agency beta waitlist, and try the free generator to see the signature format your clients would get.