Sync new email subscribers across marketing platforms

When a subscriber is added in Letterhead, automatically add them to the corresponding master list and segment in Admiral.

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See all Letterhead + Admiral integrations or talk to a human

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How Knit builds this workflow

The Agent researches both APIs and wires the trigger on one side to the action on the other — no pre-built connector required. Here is the vocabulary it has to work with.

Letterhead Explore Letterhead →

Triggers

New subscriber added

Fires when a new subscriber is added in Letterhead.

Subscriber unsubscribed

Fires when a contact unsubscribes in Letterhead.

Email opened or clicked

Fires when a subscriber opens or clicks a campaign in Letterhead.

Actions

Add or update a subscriber

Creates or updates a subscriber in Letterhead.

Unsubscribe a contact

Unsubscribes a contact in Letterhead.

Add a subscriber to a list

Adds a subscriber to a list or segment in Letterhead.

Send a transactional email

Sends a one-off transactional email via Letterhead.

Admiral Explore Admiral →

Triggers

Subscriber added

Fires when a new subscriber is added in Admiral.

Campaign sent

Fires when a campaign is sent from Admiral.

Subscriber unsubscribed

Fires when a subscriber unsubscribes in Admiral.

Actions

Add subscriber

Adds or updates a subscriber in Admiral.

Send campaign

Creates or sends a campaign from Admiral.

Add to segment

Adds a subscriber to a segment in Admiral.

Process opt-outs across both tools When a subscriber unsubscribes from a campaign in Admiral, automatically update their record to unsubscribed status in Letterhead. See details

Add engaged email readers to custom marketing segments When an email link is clicked in Letterhead, automatically add that contact to an active buyer segment in Admiral for targeted advertising. See details

See all Letterhead + Admiral integrations → · Browse the full workflow library →

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FAQ

Common questions

Can Knit build “Sync new email subscribers across marketing platforms” between Letterhead and Admiral?

Yes — describe it in the box above and Knit's Integrations Agent researches Letterhead and Admiral's public API docs (or your own uploaded docs) and builds a working workflow, whether or not either app already has a pre-built connector.

How long does it take to build?

Minutes to a first working version, not weeks — you test it against real data before it goes anywhere near production.

Why integrate Letterhead with Admiral?

It maintains consistent subscriber lists across specialized newsletter services and multi-channel marketing tools, preventing audience fragmentation and missed communications.

How are subscriber unsubscribes handled between Letterhead and Admiral?

When a subscriber opts out in either platform, the integration automatically updates their status in the other tool to maintain total compliance.