NINE15 | Shopify Plus Agency — Design, Development & CRO
Welcome to NINE15 — Shopify Plus Agency for Modern Commerce Teams

We work with brands we love — NINE15, Shopify Plus agency for design, development & CRO

From emerging startups to industry leaders, we take pride in partnering with brands we admire, empowering them to grow and achieve lasting success.

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Shopify Plus Partner  •  Strategy  •  Design  •  Development  •  CRO  •  Lifecycle  •  
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Brands we've helped grow

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Featured Case Study5-Year Partnership
$1.2B
Acquisition by PepsiCo, 2025

Siete Foods

From the first build to a scalable Shopify ecosystem — we grew alongside Siete from family business to national brand.

+22% CVR35% Faster PagesRead Case Study →
100Percent ↗
+60% Conversion rate
CRO · UX · B2B · Theme Dev
Peacock Alley ↗
+74% Revenue
UX · Custom Apps · POS · CRO
Bauer ↗
+22% CVR in week one
3D Configurators · Frontend · Design Systems
Masienda ↗
+39% Conversion rate
CRO · UX · Content Systems
Pourri ↗
B2B · CRO · UX · Theme Dev
ALMSTHRE ↗
UX/UI · Theme Dev · Analytics
SETT ↗
UX/UI · Headless · Animation · CRO
Criquet Shirts ↗
CRO · UX · IA · Audits
Renegade ↗
UX/UI · CRO · ERP Integrations
Tupelo ↗
Design · Custom Dev · CRO · Support
Mutant ↗
Migration · Theme Dev · UX/UI
All Work
12
Brands, from startup to acquisition
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Services

Providing solutions for every stage

From launch to scale, we create tailored Shopify Plus solutions to support our clients at every step of their e-commerce journey.

01 Strategy ↗Pure thinking & direction Audits · Research · KPIs · Roadmaps
02 Design ↗Experience & storytelling UX · UI · Design Systems · Accessibility
03 Development ↗Build & architecture Themes · Headless · Apps · Integrations · Migrations
04 Conversion ↗Revenue optimization CRO · A/B Tests · Journeys · SEO
05 Lifecycle ↗Retention & loyalty Email · SMS · Loyalty · Subscriptions · Post-Purchase
Blog — News & Playbooks

Field notes

All Articles
Q4 Playbook roundtable at the Sea House in Encinitas
LatestCommerce Collective
Commerce CollectiveSeptember 2, 2026

The Q4 Playbook: Convert More, Keep More

Founders and operators on CRO, email, and retention ahead of the holidays — with Everyday California, Ritual, and OC Ramps. In partnership with Okendo.

Retention 3×
RetentionJun 26, 2026

4th of July in 3 Emails

Announce, remind, close — send times, subject lines, and the segmentation that brings in more revenue.

Sustainability roundtable panelists
Commerce CollectiveJun 24, 2026

Commerce, Community & Sustainability

A live founder roundtable on growing a business while making a positive impact — with Seatrees for Ocean Month.

Partnering with the best in the industry
Shopify Klaviyo Yotpo Loop Recharge Nosto Rebuy Klevu Avalara Okendo Mailchimp VU Custom
From the brands we love

Results they talk about

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Event SeriesIn Person

Commerce Collective

Real, thoughtful conversations between the people building modern commerce brands. More gatherings on the calendar.

The NINE15 LetterMonthly

Playbooks, not promos.

The tests, flows, and fixes we run for clients — plus first dibs on event invites.

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