Shopify app comparison · updated Sep 16, 2026
Omnisend vs Mailchimp
Compare Omnisend and Mailchimp for Shopify email marketing using current ratings, review activity, pricing, features, and OngoingAI-observed adoption.
Omnisend
Omnisend Email Marketing & SMS
Run email marketing & SMS campaigns with AI marketing tools. Collect emails with popups & sell more.
- Rating
- 4.70
- Reviews
- 3,184
- Review growth · 30d
- +234 · +7.9%
- Pricing
- Free to install
- Years on Shopify
- 12
- Stores observed
- 11,136
Intuit Mailchimp
Mailchimp Email SMS Marketing
Drive sales with smarter SMS and email marketing automation built for ecommerce brands
- Rating
- 4.80
- Reviews
- 1,460
- Review growth · 30d
- +114 · +8.5%
- Pricing
- Free plan available
- Years on Shopify
- 8
- Stores observed
- 30,555
Our read
Mailchimp has the stronger observed market footprint in OngoingAI's data — it appears on 2.7× more tracked stores. Ratings and recent review growth are closer.
- Rating
- Mailchimp leads slightly4.8 vs 4.7
- Review growth
- Mailchimp faster+8.5% vs +7.9%
- Review depth
- Omnisend2.2× more reviews
- Observed adoption
- Mailchimp2.7× more tracked stores
Review trajectory
How each app's Shopify reviews are moving.
Daily App Store review counts since we began tracking — who's gaining reviews fastest, who holds the larger base, and how the race is developing.
Omnisend Email Marketing & SMS leads total reviews and is adding them fastest over the tracked window.
Reviews each app has gained since the start of this tracking window. · Tracking window · Aug 18 – Sep 15, 2026
Head-to-head
The signals, side by side.
Each row reads straight from the live App Store listing and OngoingAI’s census. The Difference column states the gap — not a buyer recommendation.
| Dimension | Omnisend | Mailchimp | Difference |
|---|---|---|---|
| Rating | 4.70 | 4.80 | Mailchimp +0.10 |
| Reviews | 3,184 | 1,460 | Omnisend 2.2× |
| Review growth · 30d | +234 · +7.9% | +114 · +8.5% | Mailchimp faster |
| Listed pricing | Free to install | Free plan available | Not directly comparable |
| Years on Shopify | 12 | 8 | Omnisend +4y |
| Stores observed | 11,136 | 30,555 | Mailchimp leads |
Review corpus
What merchants actually report.
Omnisend
4.75 avg · 2,979 reviews
Mailchimp
4.56 avg · 1,404 reviews
| Signal | Omnisend | Mailchimp | Difference |
|---|---|---|---|
| 5-star share | 90% | 83% | Omnisend leads |
| Rating · last 90 days | 4.70 | 4.85 | Mailchimp leads |
| Replies to reviews | 38% | 9% | Omnisend leads |
| Replies to critical (≤3★) | 86% | 69% | Omnisend leads |
| Long-term reviewers (1yr+) | 29% | 42% | Mailchimp leads |
| Top market | United States 45% | United States 43% | — |
| Reviews analyzed | 2,979 | 1,404 | — |
Based on public merchant reviews, with newer feedback given more weight. OngoingAI matches each review to an identifiable store and the app they use.
Which fits your requirements?
Choose by what you actually need.
Choose Omnisend if…
- You need push notifications
- You need exit intent
- You need subscriptions
Choose Mailchimp if…
- You need social media
- You need follow-up emails
- You need surveys
- A higher App Store rating is a priority
Tied to observable requirements only — listed capabilities, ratings, review growth, adoption and price. It doesn’t assert usability or support quality.
Feature differences
What Omnisend and Mailchimp each do that the other doesn’t.
They cover largely the same ground — 90% of listed capabilities overlap. The decision material is the rest: what each lists that the other doesn’t.
Omnisend only
4
- Push notifications
- Exit intent
- Subscriptions
- Product reviews
Mailchimp only
4
- Social media
- Follow-up emails
- Surveys
- Bulk editing
36 shared capabilities
- Email marketing
- Email campaigns
- SMS campaigns
- Newsletters
- Pop-ups
- Forms
- Landing pages
- Discounts
- Promotions
- Upsell emails
- Cross-sell emails
- Cart emails
- Checkout emails
- Abandoned cart
- Browse abandonment
- Welcome emails
- Price drop emails
- Back-in-stock emails
- Win-back emails
- Product recommendations
- Drip campaigns
- Custom campaigns
- Editor tool
- Templates
- AI generation
- Translation
- Localization
- Custom code
- Custom fonts
- Import and export
- Email domains
- Consent collection
- Email capture list
- SMS capture list
- Triggers and rules
- Automations
Observed adoption
Who actually runs each, on real stores.
The stores OngoingAI’s weekly census observes running each app, and the platform each skews toward — observed presence, not vendor-reported install totals.
Omnisend
11,136
stores observed
Skews Shopify · 88%
Mailchimp
30,555
stores observed
Skews Shopify · 69%
Scope
What this comparison measures.
What it measures
Shopify App Store ratings and review counts, rating distribution, developer reply rates, reviewer tenure and geography, listed pricing and capabilities, category data, and OngoingAI-observed storefront adoption for Omnisend and Mailchimp.
What it doesn’t
Hands-on usability, customer-support quality, deliverability, merchant sentiment from review text, or revenue impact. We draw a sharp line around what we can observe.
Methodology
Where the numbers come from.
Ratings, review counts, pricing, and categories come from the live Shopify App Store listing, refreshed daily. Review growth compares the observed snapshots across the trailing 30-day window. “Stores observed” and the platform split come from OngoingAI’s weekly storefront census — the real stores running each app, not the listing’s claimed totals. Comparison generated Sep 16, 2026.
See who’s switching — as it happens.
Track app adoption on live ecommerce stores. Find merchants running Omnisend or Mailchimp, follow stack changes, and see when a store installs, removes, or replaces an app.