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AgenciesandPlatforms

Multiple clients.
One AI.

Run your clients' email marketing from your agent.
Build it out. Hand over the keys.

Watch the agency launch film · 1:50

Start here

Your first client, one prompt

Scan clientname.com, build the brand kit and a three-email welcome flow. Human approval before anything sends.

Set up once.
Hand off fast.

Each client’s brand, audience and email campaigns. All run from Claude, ChatGPT, Codex or Cursor.

Scan their site. Build the brand kit. Draft the welcome flow. The client owns the account from day one. You keep a revocable seat.

You approve every send.

The old plan

In and out of
every account.
Nothing carries.

Email flows and templates
that travel between clients.

Keep the structure and cadence.
Make the voice, colors and offers theirs.

Client-owned
from day one.

Create the account from the Clients page or your own signup through the partner API. Your agent builds the brand kit, welcome flow and first drafts.

Invite the owner when it’s ready. They claim the account and pick a paid plan, and sending unlocks. You keep a revocable seat.

Explore the partner API
Nitrosend’s Add client dialog: create the account now, invite the owner when it is ready. The owner will own and pay for the account.
The hand-off, in Nitrosend.
20%

Recurring.

Generous, uncapped referral program.

For eligible Ultra and Enterprise accounts you refer. No cap. Terms apply.

Read the referral termsbuild the relationship. keep the upside.

Volume based billing.
Never pay on Seats
or Contacts.

Client-owned accounts have their own plans and email allowances.

See all pricing and plan details
Monthly plans · USD
UltraEnterprise
Per month$100from $300
Emails / month125,000500,000+
ContactsUnlimitedUnlimited
Seats included10Unlimited
Brands10Unlimited

Enterprise scales with your email volume.

Onboarding kit

The five prompts we use to onboard a client

  1. Scan clientname.com and build the brand kit: colors, fonts, logo, voice, offers.
  2. Build a three-email welcome flow for this brand in their voice. Human approval before anything sends.
  3. Copy the welcome flow and cadence from [client A] to [client B]. Keep B's brand, voice and offers.
  4. Switch to [client C] and draft this week's campaign from their latest blog post.
  5. Migrate [client]'s audiences and flows from [old ESP], then show me what changed.

Client accounts are created from the Clients page or the partner API, then invited and claimed by the owner, who picks a paid plan before sending unlocks.

From the agencies building and emailing with us.

See the whole wall ↗
“I just set it up once, and now Claude knows which template to use.”
Ohad MichaeliConsultant · Go-to-market for Shopify apps
“The way you set up the onboarding was awesome. The level of detail.”
Mark SmithFounder · Greywolf Agency
“The new wave of companies just go in headless. It's so cool.”
Finlay EkinsCo-founder · Hourglass Digital

City guides

The best AI Agencies, ranked by city.

Scored on AI automation, specialization, published evidence and a real local team. Every AI claim links to its source.

Sheets
32
Cities
24
Updated
Sep 2026