7 Must-Have Shopify Apps (2026)
Every serious Shopify store ends up running the same short list of jobs: email, reviews, upsells, SEO, support, loyalty and email capture. This guide names the one must-have app for each, the tools most stores install first and rarely replace. It is a stack, not a category ranking, so we pick one strong app per job rather than ten alternatives, and we link to the full roundup if you want to compare more. Our own upsell app is included and clearly disclosed.
Key takeaways
- Seven jobs cover what almost every store needs: email and SMS, reviews, upsells, SEO, support, loyalty and email capture.
- The must-have picks: Klaviyo, Judge.me, our Libautech Bundles & Upsell, Avada SEO, Shopify Inbox, Smile.io and Privy.
- Most of these have a free plan, so you can build the full stack cheaply and pay only where volume demands it.
- Install by priority, not all at once. Email, reviews and one upsell tool move revenue first; add the rest as you grow.
What Makes an App a Must-Have?
A must-have app does a job nearly every store needs and does it well enough that you stop shopping for alternatives. It should move a real number, revenue, conversion, retention or rank, not just add a feature. The seven below are the tools that show up in almost every healthy store's admin, because each earns its place. Install them in order of impact rather than all at once: email, reviews and upsells tend to pay back fastest.
The Must-Have Shopify Stack
| Job | Must-have app | Rating | Price |
|---|---|---|---|
| Email & SMS | Klaviyo | 4.7 (4,133) | Free to install |
| Reviews & UGC | Judge.me | 5.0 (43,170) | Free plan |
| Upsell & bundles | Libautech Bundles & Upsell (our app) | 4.9 (36) | Free plan, from $9.99 |
| SEO & speed | Avada SEO & Image Optimizer | 4.9 (4,329) | Free plan |
| Support chat | Shopify Inbox | 4.7 (5,494) | Free |
| Loyalty | Smile.io | 4.9 (4,188) | Free plan |
| Email capture | Privy | 4.5 (4,100) | Free plan |
Ratings and pricing read from each app's live Shopify App Store listing in August 2026. Our own app is marked.
1. Klaviyo: email and SMS marketing
Klaviyo (4.7 across more than 4,100 reviews) is the default marketing platform for Shopify: segmented email and SMS, prebuilt flows for welcome, abandoned cart and post-purchase, and deep store data. It is free to install with usage-based pricing as your list grows. Email is usually a store's highest-ROI channel, which is why this is the first app most stores add. Compare options in our best email marketing apps.
2. Judge.me: reviews and social proof
Judge.me (5.0 across more than 43,000 reviews) is the most-reviewed reviews app, and its free plan covers unlimited review requests, photos and on-page reviews. Social proof lifts conversion on every product page, so reviews are a must-have from day one. See our best review apps.
3. Libautech Bundles & Upsell: raise average order value
Disclosure: this is our app. Libautech Bundles & Upsell (4.9 across 36 reviews) adds product bundles, cross-sells and one-click upsells to lift average order value, with a free plan and paid tiers from $9.99 a month. Raising the value of orders you already win is one of the cheapest ways to grow, which makes an upsell tool essential. Compare the field in our best upsell apps.
4. Avada SEO & Image Optimizer: SEO and speed
Avada (4.9 across more than 4,300 reviews) handles meta tags, structured data and image compression on a free plan, covering the on-page SEO and speed basics that help you rank and load fast. Organic traffic compounds, so getting the fundamentals right early pays off for years. See our best SEO apps.
5. Shopify Inbox: support chat
Shopify Inbox (4.7 across more than 5,400 reviews) is Shopify's own free chat, unifying storefront, email and social messages so you can answer buyers fast. Quick answers to pre-sale questions recover otherwise-lost orders, and it is free. More in our best live chat apps.
6. Smile.io: loyalty and retention
Smile.io (4.9 across more than 4,100 reviews) runs a points and rewards program on a free plan, turning first-time buyers into repeat customers. Retention is cheaper than acquisition, so a loyalty program earns its place once you have a steady flow of orders. Compare in our best loyalty apps.
7. Privy: email capture and popups
Privy (4.5 across more than 4,000 reviews) is a focused popup and email-capture tool: exit-intent offers, spin-to-win and signup forms on a free plan. It feeds the list Klaviyo then markets to, so the two work as a pair. See our best popup apps.
How to Roll Out the Stack
Do not install all seven at once. Start with the three that move revenue fastest, email (Klaviyo), reviews (Judge.me) and one upsell tool, then layer in SEO, support, loyalty and email capture as traffic and orders grow. Keep the stack lean: every app adds a little load and admin, so only run the ones actively earning their keep.
How We Chose These Apps
We chose one app per essential job on the strength of its App Store rating against review count, how much its free or entry tier covers, and how directly it moves revenue, conversion or retention. This is a starter stack, not an exhaustive category ranking, so each category links to its full roundup for alternatives. Ratings are from the Shopify App Store as of August 2026, and our own app is disclosed.
Think your app belongs on this list?
We review submissions against the same criteria we rank on and add the ones that qualify. If you build a Shopify app in this category, send it in.