1. Listing metadata
Field-level data| Back In Stock! Alert Engine | Privy ‑ | |
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| Back In Stock! Alert Engine | Privy ‑ | |
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| Tagline | ||
| Description | ||
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Notify customers by restock alert when items are back in stock & create an out-of-stock waitlist.
| Metric | Back In Stock! Alert Engine | Privy ‑ Email, SMS & Pop Ups |
|---|---|---|
| Rating | ★ 4.8 ★ | 4.5 ★ |
| Total reviews | 19 | ★ 4.1k |
| Free plan | ★ Yes | — |
| Pricing | ★ Free | From $24/month |
| Built for Shopify | — | — |
| Pricing tiers | — | 3 tiers |
| Listed features | 5 | 5 |
| Featured placements | — | 1 |
| Languages | 1 supported | 4 supported |
| Listed since | Dec 2024 | Jun 2015 |
Back In Stock! Alert Engine edges out Privy ‑ Email, SMS & Pop Ups on rating (4.8★ vs 4.5★), but the gap is small enough that pricing fit and feature differentiation should drive the decision more than the headline number. On pricing, Back In Stock! Alert Engine offers a free tier (Free) while Privy ‑ Email, SMS & Pop Ups starts at From $24/month. For early-stage stores or merchants validating fit, the free-tier path lets you run the app on real orders before committing budget. Privy ‑ Email, SMS & Pop Ups has the larger user base (4,083 reviews vs 19), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Back In Stock! Alert Engine's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat. Recommended by store size: small/early-stage merchants who need fast install and low risk should default to Back In Stock! Alert Engine; mid-market and enterprise merchants with specific feature requirements should evaluate both — Privy ‑ Email, SMS & Pop Ups's 4,083-review base may include the workflow context that matches your specific use case better than Back In Stock! Alert Engine's broader-but-shallower coverage. This verdict is generated from the live marketplace data on this page — rating, review count, pricing tier, and category position all refresh from the canonical Shopify App Store listing every 24 hours. AppRanks does not accept payment to influence comparison outcomes; the methodology is documented on the About page and applies identically to every pair on the site.
Read each app's audit: Back In Stock! Alert Engine audit • Privy ‑ Email, SMS & Pop Ups audit
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| Keyword | Back In Stock! Alert Engine | Privy ‑ |
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| #57 | #20 |
Not featured in any section recently.
No tracked changes.
Back In Stock! Alert Engine is the cheaper option — it offers a free plan (Free). Privy ‑ Email, SMS & Pop Ups starts at From $24/month. Both publish their pricing on the Shopify App Store marketplace; AppRanks mirrors what's listed on each refresh cycle.
Back In Stock! Alert Engine has the higher average rating (4.8★ from 19 reviews) compared to Privy ‑ Email, SMS & Pop Ups (4.5★ from 4,083 reviews). Both are tracked daily by AppRanks, so the figures here update each refresh cycle.
It depends on what you're optimizing for. Back In Stock! Alert Engine fits better if you prioritize rating consistency; Privy ‑ Email, SMS & Pop Ups is the call if you need the larger user base. Read both apps' detail pages on AppRanks for the full feature breakdown, install counts, and recent listing changes.
Both apps are one-click installs from the Shopify App Store marketplace. Privy ‑ Email, SMS & Pop Ups has more onboarding documentation maturity (4,083 reviews vs 19), which usually translates to better-tested setup wizards and quicker time-to-value. AppRanks doesn't measure setup time directly — read the recent reviews on each app's detail page for merchant-reported install experience.
Back In Stock! Alert Engine typically suits early-stage and growth-mode stores based on its review-base composition (19 reviews). Privy ‑ Email, SMS & Pop Ups aligns more with early-stage and growth-mode stores (4,083 reviews). Larger review bases generally mean the app has been load-tested at scale — relevant if you're processing high order volume or handling enterprise compliance requirements.
Migration support varies by app and category. Back In Stock! Alert Engine and Privy ‑ Email, SMS & Pop Ups both publish their export options on their marketplace listing pages (or in their support docs); some apps offer one-click import from competitors, others require CSV. The fastest check: search "import from Back In Stock! Alert Engine" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
