Rintrah

Five areas, one system

Meta's algorithm has become significantly more sophisticated. It needs more data, more optimisation freedom and more creative diversity than most accounts give it. These are the five places we usually find the gap.

“If the doors of perception were cleansed every thing would appear to man as it is, infinite.”

Signal engineering

Meta optimises towards whatever you tell it a conversion is, and it will happily claim purchases it did not achieve. We set up Meta CAPI, server-side GTM and custom conversions, including category-conditional events: all the data still goes into one pixel, so the algorithm learns what your whole customer looks like, but each campaign has to optimise towards the specific customers it's meant to find. We build it ourselves or spec it for your developer.

“Many are called, but few are chosen.”

Funnel & conversion

Since Andromeda, customers treat ads more like organic posts. They read the comments, explore the profile, then land on your page. If the handle, the creative and the landing page don't feel like one brand, the journey becomes disruptive and low-trust. We design and build landing pages tailored to your personas and angles, so the whole funnel says the same thing.

“What is now proved was once only imagin’d.”

Creative strategy

Every creative is built from four blocks: persona, angle, format and creator. “Human struggling with sleep” is not a persona; “mum struggling with sleep” is. We find the personas worth pursuing through surveys, reviews and research, then test them systematically across angles, formats, creators and offers. Each test is also a touchpoint, so you're not just capturing demand, you're creating your own.

“A wise man, which built his house upon a rock.”

Meta account architecture

GEM and Andromeda let Meta understand the conceptual meaning of creative: make an ad about dog food and Meta shows it to dog owners. What it needs from you is more data and more optimisation freedom. We keep testing granular in one ABO and consolidate winners into a CBO with one ad set, so Meta decides the role each ad plays and, practically speaking, builds its own funnel.

“Look now toward heaven, and tell the stars, if thou be able to number them.”

Measurement & incrementality

Platform ROAS flatters. We track what's new and what's caused: new-customer purchases, NCPA and NC ROAS, brand match rate, and value-adjusted ROAS that only counts the part of the basket the ad was actually about. Then we build the tests and reporting that separate what Meta caused from what it claims.

Results

What this system did over two quarters for a fast-growing UK wellness brand, and what we aim for with you.

~2×Meta spendWith you: scale spend 1.5–2× without CAC rising

−50%New-customer CACWith you: cut NCAC by 20–40%

2×Marginal iROASWith you: lift marginal iROAS 1.5× or more

15 → 65+Creatives a weekWith you: 3–4× your weekly creative output

The aims are targets, not guarantees. Where you start decides how far we can go.

Ways to work together

Pick where you are. Most clients start with the audit and move along the path from there.

Growth Stack Audit

Completely new? For early-stage brands we work at a heavily reduced rate in exchange for equity. Let's talk →

A growth engineering studio.

Rintrah builds the whole system behind paid social for brands that advertise on Meta: the signal the algorithm learns from, the creative it chooses between, the pages it sends people to, and the numbers that say what actually worked.

The name
Rintrah is the prophet of fire in Blake’s The Marriage of Heaven and Hell. He roars; he does not flatter. Neither do our audits.
How we work
Advisory by default. We design the system, your team or agency runs it, and we review every round. If you would rather we ran the account, we do that too.
Who it’s for
DTC and subscription brands spending from £5k to £300k+ a month on Meta, and the occasional new brand in exchange for equity.
Size
Small on purpose. The people who audit your account are the people who do the work.

Common questions

Do you run the ads?

We can: media buying is a service of its own. Most clients keep day-to-day buying with their team or agency and have us design the strategy, review what they do and help analyse performance.

Can you find us a winning ad?

No, and we'd be wary of anyone who promises one. Once an account is consolidated, Meta decides the role each ad plays. A CBO might put its spend behind two top-of-funnel ads and a long tail of offer-led ones that, together, drive the results. If an ad isn't getting spend, the algorithm has usually made its call. We build the system that keeps feeding it.

Why do we need so many creatives?

Because testing one persona properly takes 5–6 angles across 3–4 formats: at least 15 unique creative batches, before copy, design and hook variants. Most brands are very far from that volume. The Creative Strategy Sprint tells you what to make; Los helps you make it.

Should everything go in one campaign?

Consolidate where and as much as possible, not everywhere. Products with wildly different margins, AOVs and LTVs don't play well together when you scale, so they get their own CBO. Everything with overlapping audiences shares one, so you stop bidding against yourself.

Should we run ads from other pages?

Sometimes, but not as your main strategy. More engaging creative from a third-party page often still brings in new customers at a higher cost, because the handle, the ad and the landing page don't match. In the long run, build up your own handle.

Will you build our tracking?

Yes, if you want us to. We audit your setup, then either implement Meta CAPI, server-side GTM and custom conversions ourselves, or write the spec for your developer and check it works.

Do you write briefs or manage creators?

We do the research and persona and angle mapping, build the testing matrix and give feedback on every round. Your team writes the briefs and runs creators, or Los helps them do it at volume.

What about Google and TikTok?

Our expertise is Meta. We advise on Google and TikTok at a strategic level.

What access do you need?

View-only or analyst access to your ad accounts and analytics. We never need admin rights, unless we're running your media buying.

How many clients do you take on?

Three new clients at a time, so each one gets senior attention. If we're full, we'll tell you when a spot opens.

Fractional Full-Stack Growth Engineering