Custom Email Shopify Apps – Market Share Breakdown
(Updated September 2026) See which custom email Shopify apps dominate installs and how their share has shifted over time. This keyword page shows the full market share table, monthly share trends for the leaders, and a country-level breakdown so you can compare global vs regional dominance.
Custom Email Shopify Apps — Full Market Share Table
All tracked custom email Shopify apps ranked by current install share, with change vs 30 days ago and Leader / Climbing / Declining / Stable status — filterable by country and date range.
| # | App | Market Share | Change | Status |
|---|---|---|---|---|
| 1 |  Seal Subscriptions App | 58.61% | 37.01 | Climbing |
| 2 |  SendWILL Popup Email Marketing | 27.00% | 28.02 | Declining |
| 3 |  Casa Loyalty Points & Rewards | 6.90% | 2.97 | Climbing |
| 4 |  Hulk Contact Form Builder | 6.08% | 11.83 | Declining |
| 5 |  Blocky Fraud Filter IP Blocker | 1.21% | 0.09 | Declining |
| 6 |  SureCust Forms Builder, Locks | 0.07% | 0.02 | Climbing |
| 7 |  RenderKu: Email Templates | 0.02% | 0.02 | Climbing |
| 8 |  Giftnote: Gift Message Engine | 0.02% | 0.00 | Climbing |
| 9 |  Gift Card Factory | 0.02% | 0.05 | Declining |
| 10 |  Country Blocker Fraud Securify | 0.02% | 0.02 | Climbing |
Showing 1-10 out of 24
Key Insights:
- Seal Subscriptions App holds 58.6% share of custom email app installs — 31.6pp ahead of SendWILL Popup Email Marketing (27.0%).
- Top 3 apps (Seal Subscriptions App, SendWILL Popup Email Marketing, Casa Loyalty Points & Rewards) account for 92.5% of all custom email install share — a concentrated market.
- Seal Subscriptions App is gaining share fastest this month (+37.01pp) — the largest single gainer among the top custom email apps by share.
- SendWILL Popup Email Marketing is losing share fastest (-28.02pp) — could indicate a churning user base or a stronger challenger gaining ground.
Custom Email Shopify Apps — Market Share Over Time
Monthly market share trajectory for the top 5 custom email Shopify apps over the past year — see who's gaining or losing install share month by month.
Charts Data
| App | Apr 2026 | May 2026 | Jun 2026 | Jul 2026 | Aug 2026 | Sep 2026 |
|---|---|---|---|---|---|---|
| Casa Loyalty Points & Rewards | — | 3.6% | 4.0%0.39 | 7.0%3.04 | 16.8%9.79 | 43.3%26.47 |
| SendWILL Popup Email Marketing | — | 52.9% | 55.1%2.19 | 27.0%28.07 | 64.9%37.88 | 29.7%35.2 |
| Blocky Fraud Filter IP Blocker | — | 1.1% | 1.3%0.16 | 1.2%0.07 | 2.3%1.1 | 9.9%7.58 |
| Hulk Contact Form Builder | — | 9.7% | 17.9%8.25 | 6.0%11.89 | 6.2%0.1 | 9.0%2.83 |
 Report Pundit: Custom Reports | — | — | — | — | 9.4% | 7.7%1.76 |
Key Insights:
- Casa Loyalty Points & Rewards's share expanded from 3.6% → 43.3% over the charted period.
- Of the top 5 tracked custom email apps, 2 grew share and 3 lost share — leader is widening the gap.
Top Custom Email Shopify Apps by Country
Per-country market share rankings for custom email Shopify apps across 5 markets — see which apps lead in each country and where regional leaders diverge from the global leader.
| # | 🌎 Worldwide |  United States |  India |  China |  United Kingdom |
|---|---|---|---|---|---|
| 1 | | | | ||
| 2 | | | |||
| 3 | | | | | |
| 4 | | | | | |
| 5 | | | | | |
Key Insights:
- Seal Subscriptions App leads custom email apps in 2 of 4 tracked markets (United States, United Kingdom).
- Seal Subscriptions App leads worldwide, but 2 of 4 tracked markets crown a different leader — SendWILL Popup Email Marketing in India, SendWILL Popup Email Marketing in China.
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Top 5 Apps in Custom Email
- Casa Loyalty Points & Rewards — Leads custom email apps with 43.3% install share, rated 5.0★ — gaining share this month.
- Blocky Fraud Filter IP Blocker — Holds 9.9% of custom email app install share, rated 4.7★ — gaining share this month.
- SendWILL Popup Email Marketing — Holds 29.7% of custom email app install share, rated 4.9★ — losing share this month.
- Report Pundit: Custom Reports — Holds 7.7% of custom email app install share, rated 5.0★ — gaining share this month.
- Hulk Contact Form Builder — Holds 9.0% of custom email app install share, rated 4.9★ — gaining share this month.
Custom Email Shopify Apps — Frequently Asked Questions
1. Which custom email app has the highest market share on Shopify?
Seal Subscriptions App dominates the custom email category on Shopify with 58.6% of installs — 31.6pp ahead of SendWILL Popup Email Marketing. This is a clear leader by share, so most merchants default to it unless they have a niche-fit reason to pick differently.
2. How is market share calculated for custom email Shopify apps?
For custom email (a keyword page), market share is rank-weighted — apps at position #1 carry roughly 40× the weight of apps at position #22, and apps beyond #22 are excluded. Each app's weighted score is divided by the total weighted score across the keyword to give the share %. This reflects Shopify search behaviour: most installs come from the top of the results.
3. Which custom email apps are gaining market share on Shopify?
Seal Subscriptions App is gaining custom email app market share fastest this month, up +37.01pp versus 30 days ago. Switch the table sub-tab to "Market Share Changes" to see all gainers ordered by movement.
4. Which custom email apps are losing market share on Shopify?
SendWILL Popup Email Marketing has lost the most market share this month among custom email apps (-28.02pp). Sort the table by Change (Low to High) to see the full list of decliners.
5. Which countries drive the most custom email Shopify app installs?
United States drives the largest share of custom email app installs at 41.2%, followed by United Kingdom at 7.8% and Canada at 4.9%. Use the country picker on the third card to compare market leaders by country.
6. How many custom email apps does ShopDigest track on Shopify?
ShopDigest tracks 96 custom email apps on the Shopify App Store. Market share, rankings, and review data refresh weekly so you can track competitive shifts as they happen.
