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Data-Driven. Incrementally Proven
Stop guessing.
Start growing.
Fish River is a performance marketing partner fusing decision intelligence, algorithmic reverse-engineering, and elite creative. We pair our proprietary Genesis Engine with rigorous incrementality testing to prove net-profit impact — so you scale with confidence, not hope.
Book a Strategy Call
See How We Work
$
1B+
Career media managed
50%
Average ROI increase
15+
Years senior experience
20+
Industries served
Experience
Senior operators, not account managers in training.
Every engagement is led by practitioners who've managed nine-figure budgets across search, social, and programmatic — Fortune 100 to SMB, awareness to ecommerce and lead gen. We then train our proprietary Genesis AI on that same senior intelligence, so every output is expert-grade — maximizing ROI while offsetting cost. You get the people who built the playbooks, plus AI that thinks like them.
Meet the team →
Genesis Engine
Our proprietary growth engine.
The Genesis Engine is the system that powers our edge — a network of AI agents trained on platform behavior, audience signals, and your historical learnings. It reverse-engineers algorithmic opportunity and accelerates the creative process from brief to live in a fraction of the usual time.
Explore the engine →
Tech Stack
Best-in-class tools.
One agentic brain.
Here's a real point of difference: we don't make you choose between proprietary tech and proven platforms. We orchestrate the best third-party tools across every discipline and pipe their signal into Genesis — our agentic engine that reasons over it and returns validated work.
Third-party signal flows in continuously. Genesis reasons over it with persona-trained agents and returns validated output.
See the full stack & how it pipes into Genesis →
Services Overview
The same disciplines —
run a different way.
It's not the list of services that sets us apart; it's how we run each one. Every lever is treated as an experiment and held to proven, incremental profit.
Paid Media
Run as a lab — we bid to profit, prove lift with geo-holdouts, and cut what isn't incremental.
Creative
Built to feed the algorithm — modular, Genesis-driven, fatigue-proof, and yours to keep.
Website
Found by Google, cited by AI. AEO (SEO + GEO), CRO, and pages built to convert.
Measurement
Causation over correlation — incrementality, LTV, and MMM with Recast & Measured.
Client Results
Validated wins, not feel-good numbers.
A sample of white-labeled outcomes from partners across DTC, services, and B2B. Every figure is backed by incrementality testing.
DTC • Apparel
+62%
Incremental revenue in two quarters after restructuring paid media around validated signals.
B2B • SaaS
−38%
Reduction in cost-per-qualified-lead by reallocating spend away from non-incremental channels.
Services
3.1x
Return on ad spend within 90 days using Genesis Engine creative and CRO-optimized landing pages.
See the work →
Ways to Engage
Three ways to put us to the test.
However you start, you'll see how we think before you ever sign a long-term deal.
01
Account Audit
We pressure-test your current accounts and show exactly where wasted spend and untapped incremental upside are hiding — with a clear plan to capture it.
02
Head-to-Head Bakeoff
Run us against your current setup or another agency on a defined test. Let validated, incremental results decide — not the pitch deck.
03
Pitch
Bring us your brief and goals. We'll come back with a tailored, full-funnel strategy and the first experiments we'd run to move your business.
Ready to prove what your marketing is really worth?
Get a free 30-minute strategy session to pressure-test your current spend and map the fastest path to validated growth.
Book Your Strategy Call
Performance marketing, incrementally proven.
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The Work
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Paid Media
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hello@fishriver.com
+1 (201) 579-0186
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