Custom Campaigns Shopify Apps – Analytics & Insights

Klaviyo: Email Marketing & SMS ranks #1 for custom campaigns with 19.3% share — the leader position in a fragmented field where many apps are within striking distance, -57.2pp ahead of Shopify Flow (76.5%). Brevo PushOwl: Email,Push,SMS sits at #3 with 2.3% share, rounding out the top tier. Together, the top 3 apps absorb 98.0% of all custom campaigns installs — a highly concentrated landscape with limited room for new entrants. Abandoned Cart Email Marketing is the standout mover this month, climbing 2 positions — a momentum signal worth tracking. Worth noting: the top-ranked app and the highest-share app aren't the same here — App Store rank and our market share metric (computed from review counts and other factors) move on independent dynamics, so cross-checking both views matters in this category.

Custom Campaigns is a fragmented market — the top 3 apps together hold only 98.0% of installs, leaving Klaviyo: Email Marketing & SMS's 19.3% lead modest in absolute terms and Brevo PushOwl: Email,Push,SMS at 2.3% still capturing meaningful share. With this many viable apps, pricing model and integration depth differentiate custom campaigns options more than rank does.

Klaviyo: Email Marketing & SMS held #1 steadily from May 2026 to Sep 2026 — an entrenched leader in custom campaigns that challengers haven't displaced. Across the top 5 plotted custom campaigns apps, 2 improved their ranking while 1 declined — the category is moving upward overall. Klaviyo: Email Marketing & SMS's share held near 19.3% from May 2026 to Sep 2026 — a stable install base for custom campaigns apps rather than active gain or loss.

Stable rankings across the top 5 plotted custom campaigns apps mean merchants have largely settled on their preferences — challengers below the top 5 face an uphill path to break in.

United States dominates demand for custom campaigns apps with 40.5% of all tracked installs — a single market that effectively defines the category's product priorities. United Kingdom follows at 7.2%, with Australia at 5.3%. Together, the top 3 markets account for 53.0% of custom campaigns app installs worldwide. Canada (5.1%) and Germany (3.9%) round out the top 5. United Kingdom is the fastest-growing market this month (+0.1pp), pointing to accelerating demand outside the established leaders.

With 40.5% of custom campaigns app installs concentrated in United States, the leading apps in this category typically prioritize United States-based merchants for localization, currency, and support hours — merchants in United Kingdom (7.2%) and other regions sometimes find better fit in apps that over-index outside United States.

Shopify Flow reached 1,000 reviews in 51 months since launch — the fastest ramp among the top 5 custom campaigns apps tracked here. Brevo PushOwl: Email,Push,SMS in 58 months, Omnisend Email Marketing & SMS in 92 months, and Klaviyo: Email Marketing & SMS took 114 months to cross the same milestone, a 63-month spread between the fastest and slowest in the set.

1 app on this chart hasn't yet crossed 1,000 reviews: Abandoned Cart Email Marketing at 145 cumulative reviews. Abandoned Cart Email Marketing is closest to the milestone — its current count puts it roughly 14% of the way to 1,000.

The 63-month gap between Shopify Flow's and Klaviyo: Email Marketing & SMS's time-to-1,000 highlights how unevenly product-market fit landed across this custom campaigns set — the leader found its merchant audience early, while late-rampers took multiple years to reach the same review depth. For merchants comparing these apps today, slower-ramping apps may have closed the functionality gap but still operate on smaller review bases.