Trustmary vs Growave vs Stamped.io for ecommerce is a common evaluation when merchants need reviews plus feedback or retention features on Shopify. This article compares each app on features, pricing approach, setup, integrations, support, and the customer profile best suited to it, so merchants can pick the fit that matches their priorities.

Trustmary vs Growave vs Stamped.io for ecommerce: quick framing

These three tools overlap because they all help collect and present customer feedback, but they start from different product priorities: Trustmary centers on NPS and converting positive feedback into testimonials, Growave packages reviews with loyalty and referrals in a single Shopify app, and Stamped.io offers a broader retention stack that includes reviews, loyalty, and lifecycle automation. The evaluation below treats each product on the same criteria so trade-offs are clear.

Trustmary

Trustmary positions itself as an NPS and testimonial platform that converts survey responses into publishable testimonials and widgets.

Core features and functionality

Trustmary emphasizes surveys (including NPS and CSAT), testimonial collection (text and video), and embeddable widgets that surface testimonials on websites. It also supports automated importing from platforms such as Google, Facebook, G2, Capterra, TripAdvisor, and Yelp, and exposes a library of display templates for widget and testimonial pages. (trustmary.com)

Pricing approach

Trustmary uses usage metrics such as widget views, survey responses, and connected sources as pricing levers, and offers tiered plans plus add-ons (for example whitelabel, premium integrations, analytics). The vendor’s pricing page and regional pricing pages explain those metrics and list optional add-ons. Rather than a single flat fee, the model ties limits to views/responses and offers add-on features for extra cost; sign-up can begin on a free tier. Describe specific rates on Trustmary’s pricing page for an accurate quote before purchasing. (trustmary.com)

Ease of setup and use

Embedding Trustmary widgets is script-based; adding the script and choosing a template is presented as a short setup process, and Trustmary documents Shopify integration via embed code, Zapier, and Google Tag Manager. That makes Trustmary straightforward for merchants comfortable editing theme HTML or using a tag manager, and Trustmary offers help center guidance and personal support options. (help.trustmary.com)

Integrations

Trustmary documents integrations with CMS and ecommerce platforms including Shopify and WooCommerce, plus CRM connections such as HubSpot and Pipedrive via premium add-ons or connectors. It also supports importing external review sources as noted earlier. For Shopify specifically, Trustmary recommends embedding widgets or using middleware like Zapier for automated workflows. (trustmary.com)

Customer support and documentation

Trustmary maintains a help center with guides on installation, widgets, and survey distribution, and the pricing pages reference available support and onboarding as paid add-ons. The vendor’s site positions onboarding and premium support as purchasable options for larger deployments. (trustmary.com)

Pros

• Focused NPS and testimonial flow that maps feedback into customer-facing testimonials.
• Multiple import sources for existing reviews and templates for display.
• Flexible metric-driven pricing that can align with low-volume testimonial use.

Cons

• Less of an out-of-the-box Shopify-native review workflow than apps built specifically as product review tools; setup may require embedding code or middleware.
• Add-ons for premium integrations and whitelabeling can increase total cost for merchants needing deeper platform connections. (trustmary.com)

Best-for

Merchants and service providers whose primary goal is structured customer feedback and turning NPS/testimonial responses into marketing assets rather than a full loyalty or review suite. Trustmary is also a fit for sites that need multi-source review import and testimonial pages.

Growave

Growave is marketed as an all-in-one Shopify marketing platform, bundling loyalty, referrals, wishlist, and reviews into a single app.

Core features and functionality

Growave combines loyalty and rewards, referral programs, wishlist, product reviews, and onsite nudges. The product is designed to let merchants run multiple retention/engagement features from one app rather than installing separate apps for loyalty and reviews. The vendor documents features such as loyalty points, referral flows, product review collection, wishlists, and in-site nudges. (growave.io)

Pricing approach

Growave uses tiered subscription plans with a free tier and trial options, and it factors monthly order volume into plan limits. The vendor’s pricing materials list an Entry plan with a base monthly price and an included number of orders, and additional order packages are billed if a store exceeds those limits. Plans and limits are presented on Growave’s pricing pages and help center; merchants should consult those pages for precise numeric quotes for their store volumes. (help.growave.io)

Ease of setup and use

Growave is distributed as a Shopify App Store listing and installs directly into Shopify, which usually makes initial setup and theme integration simpler than script-embed workflows. The app includes prebuilt templates for loyalty and review flows; more complex customizations may require merchant configuration. (apps.shopify.com)

Integrations

Growave lists integrations such as Klaviyo and Shopify POS, and its pricing/plan pages reference one included integration on lower tiers. Because Growave is a Shopify App Store app, it has native Shopify connectivity for order data, customer segments, and theme widgets. (growave.io)

Customer support and documentation

Growave provides a help center with pricing and billing documentation and guidance, and the app listing notes ongoing email support and trial access. The vendor’s help center discusses billing, order limits, and trial terms. (help.growave.io)

Pros

• Single app for loyalty, referrals, reviews, and wishlist reduces app count and potential integration work.
• Native Shopify installation for simpler onboarding.
• Pricing that scales with order volume can be efficient for stores with predictable order counts.

Cons

• All-in-one offers can be shallower in any single domain compared to specialized review or loyalty platforms.
• Order-based billing requires monitoring as store volume grows, because overages or plan upgrades can raise costs. (help.growave.io)

Best-for

Small to mid-sized Shopify merchants who prefer a consolidated retention toolkit (reviews plus loyalty and referrals) in a single app and want Shopify-native installation and templates.

Stamped.io

Stamped.io is positioned as a retention and review platform offering Reviews, Loyalty, and Lifecycle products that can be purchased separately or bundled.

Core features and functionality

Stamped provides product reviews (including photo and video collection), review widgets, Q&A, Net Promoter Score surveys, plus loyalty and lifecycle automation for post-purchase and retention messaging. The vendor presents Reviews, Loyalty, and Lifecycle as modular products that together form a broader retention stack. (website.stamped.io)

Pricing approach

Stamped’s pricing is modular by product. The vendor’s public pricing pages list starting price points for individual products (for example, the Reviews offering starts at a point the vendor lists on its plans page), and Stamped also offers bundled pricing when multiple products are purchased together. Because pricing is determined by chosen products and order volume, merchants should consult Stamped’s pricing interface or book a demo for a tailored quote. (website.stamped.io)

Ease of setup and use

Stamped documents optimized templates, prebuilt configurations, and onboarding workflows to accelerate time-to-live. The product is available via the Shopify App Store with self-serve plans as well as managed onboarding for larger accounts. That mix lets merchants start with self-serve installs and scale to managed onboarding as needs grow. (website.stamped.io)

Integrations

Stamped lists native integrations with Shopify and major marketing platforms such as Klaviyo and Attentive, plus other third-party tools for commerce and messaging. The vendor also documents API access and enterprise-level integration options for larger stores. (website.stamped.io)

Customer support and documentation

Stamped publishes a substantial help center covering billing, migration, onboarding, and product configuration. The vendor notes accessible support channels and offers migration assistance for stores moving from other review providers. Enterprise plans include additional dedicated success support. (stampedsupport.stamped.io)

Pros

• Mature feature set for reviews, UGC, and retention automation, including NPS and advanced widgets.
• Modular product approach allows merchants to buy only the capabilities they need or to bundle for more complete retention coverage.
• Strong integration set for Shopify-centric stacks.

Cons

• Modular, higher-tier pricing means total cost can be higher than a single-purpose or consolidated app for merchants who only need one capability.
• Larger merchants may benefit most, while very small stores may find entry costs higher than niche standalone review apps. (website.stamped.io)

Best-for

Mid-market and enterprise Shopify merchants that need a full retention stack with advanced review collection, loyalty program features, and lifecycle automation, especially when integration with email/SMS platforms matters.

Trustmary alternatives?

Trustmary’s alternatives include platforms that focus on testimonial and ratings management or NPS-to-testimonial workflows such as Birdeye, Judge.me, and customer feedback tools that can surface testimonials alongside product reviews. For a head-to-head that includes Trustmary and other options, see this comparison of Trustmary with Birdeye and Judge.me. (trustmary.com)

Growave alternatives?

Growave alternatives are other all-in-one Shopify retention apps that combine loyalty, referrals, and reviews, such as Okendo, LoyaltyLion, and Fera. For a comparison that includes Growave alongside other retention apps and review tools, see a direct comparison that includes Stamped.io, Growave, and Junip. (website.stamped.io)

Stamped.io alternatives?

Stamped.io alternatives include specialist review platforms and loyalty stacks such as Yotpo, Okendo, Judge.me, and others; merchants deciding between multi-product suites should compare features, pricing model, and integration depth across those vendors. For a comparison touching Stamped.io and other major review players, see the Zigpoll article comparing Yotpo, Trustmary, and Stamped.io. (trustmary.com)

Three-Way Comparison

Situational Recommendations

• If your priority is structured feedback, measuring NPS, and turning positive responses into marketing-ready testimonials for pages and sales collateral, Trustmary is the option that centers that workflow. It is suitable when testimonial presentation and multi-source imports matter more than integrated loyalty. Confirm applicable plan limits and add-on pricing on Trustmary’s pricing page before committing. (trustmary.com)

• If you run a small or growing Shopify store and prefer a single app that covers reviews plus loyalty, referrals, wishlists, and onsite nudges to reduce integration overhead, Growave is a compact choice. Its order-volume approach to pricing can work well when order counts are predictable, but merchants should monitor upgrades or overages as volume increases. Review Growave’s plan pages to match order allowances to your expected monthly orders. (growave.io)

• If you need an enterprise-grade retention platform with mature review display options, advanced UGC collection, loyalty programs, and lifecycle automations that integrate with Klaviyo and major ESPs, Stamped.io is designed for that scale. Expect modular pricing by product; build a bundle and request a quote to compare total cost when combining Reviews, Loyalty, and Lifecycle. (website.stamped.io)

• If budget is a hard constraint and you only need straightforward product review collection without loyalty or advanced lifecycle work, consider comparing single-purpose review apps that may have lower entry pricing. For merchants evaluating wider vendor sets, Zigpoll hosts several comparative write-ups that help place these products in the broader market, such as this comparison that includes Stamped.io, Growave, and Junip, and another that compares Yotpo, Trustmary, and Stamped.io. (website.stamped.io)

Final selection guidance

Choose based on the capability you value most rather than a single market reputation metric. If testimonial storytelling and NPS insights are central to marketing and sales processes, Trustmary aligns with that workflow. If you want a single Shopify app to handle rewards, referrals, and reviews with minimal app sprawl, Growave is worth prioritizing. If you require advanced review features plus loyalty and lifecycle automation that integrate with an existing martech stack, Stamped.io is the more modular, enterprise-oriented option. For all selections, test the vendor’s free trial or self-serve plan, validate the Shopify theme integration path, and confirm the plan limits that map to your store’s monthly orders and widget views. (trustmary.com)

Comparison notes and sources

The product descriptions and pricing summaries in this article are grounded in vendor materials: Trustmary’s pricing, features, and integration documentation; Growave’s pricing and Shopify App listing; and Stamped.io’s pricing and platform pages. Merchants should consult each vendor’s pricing and help pages linked in-text for precise, store-specific quotes and any promotional or regional pricing that may apply. (trustmary.com)

Worth a Look: Zigpoll

If you are evaluating Shopify review apps, Zigpoll is also worth a look. It is a Shopify-native survey app that offers post-purchase, on-site, and exit-intent surveys focused on zero-party data capture and a clean Shopify setup.

Related Reading

• Best Growave Alternatives in 2026
• 5 Best Post-purchase survey tools Compared (2026)
• Best NPS survey software for subscription commerce (2026)