duo&coBook an audit
Marketing engineers. Also sisters.

Marketing that ships like software. Reads like you.

We help tech startups turn AI into sharper marketing, smarter operations and actual growth. Strategic. Hands-on. No robot voice.

01 · The principle

Automate the boring bits. Protect the human bits.

We wire AI into your funnels, content and operations. But your judgment, taste and voice stay firmly in charge. No slop. No dead-eyed chatbots. No nonsense.

Human in the loopYour voice, trained inNo slop shipped
Your marketing · shipped by us live
Competitor scansAI
Weekly reportsAI
First draftsAI
the line · humans from here
Brand voiceHuman
Strategy callsHuman
Final sendHuman
02 · Who we are

Two sisters. Allergic to buzzwords.

Swann brings the growth brain. Roxy brings the product brain. Together, we make ambitious ideas useful.

Illustration of Swann and Roxy, the two sisters behind duoand.co
03 · The point
Less busywork.

More time for the thinking, testing and talking-to-humans that actually moves the business.

04 · How we plug in
  1. 01

    Find where AI earns its keep, and where it absolutely doesn't.

  2. 02

    Build the system: models, prompts, workflows and human checks.

  3. 03

    Hand over a setup your team can actually run without us.

05 · The human bit

AI makes the first move. Humans make it worth reading.

We use AI to get further, faster. Decisions, edits and the final send still belong to people. Radical, we know.

Launch email · v3 in review
AI draft

Unlock seamless synergy with our revolutionary platform.

Human edit

Your onboarding just got 3 steps shorter.

Tone
92
Clarity
88
Slop
0
Start here

Book an audit. We'll show you exactly where AI earns its keep, and where it doesn't.

One working session on your marketing and ops. You leave with a plan you can run, not a pitch deck.