Trustmary vs Stamped.io vs Growave for small ecommerce businesses is a common decision for store owners who need reviews, NPS feedback, and basic retention tools without hiring a dev team. This article compares the three apps side by side, covering how they work, what they charge in broad terms, setup work, integrations, and the kinds of small stores each suits best.

Why these three are compared

Shopify merchants often need social proof plus a way to capture voice-of-customer signals. Trustmary focuses on NPS and converting positive responses into publishable testimonials. Stamped.io is built around ecommerce reviews combined with lifecycle and loyalty features. Growave bundles reviews with loyalty, referrals, wishlists, and UGC tools. Those overlap enough that store owners evaluating lightweight review collection, on-site widgets, or a small retention stack will place these three next to each other.

Trustmary

What it does

Trustmary is positioned as an NPS and testimonial platform that turns positive feedback into publishable reviews, widgets, and testimonial pages. It emphasizes surveys that route satisfied respondents into public testimonials and collects other feedback for analysis. (trustmary.com)

Pricing approach

Trustmary markets a free starter option and counts usage in terms of views, responses, requests, and connected review sources. Limits are enforced by metrics like widget views; when a view limit is reached the widget hides until the limit resets. For detailed plan features and exact limits, see Trustmary’s pricing page. (trustmary.com)

Practical takeaway for a small store: you can start without a big bill and grow into paid tiers as you need more survey sends, widget impressions, or connected sources.

Ease of setup and use

Trustmary’s core operation is form-based: create an NPS or testimonial form, embed a widget, or distribute a unique URL/QR. Embedding requires pasting a small script into Shopify theme or using a Custom HTML element. There is also guidance and templates in its library, which keeps the initial build simple for nontechnical users. If you need deeper automation, Trustmary recommends Zapier or Google Tag Manager flows. (trustmary.com)

Gotcha: trust widgets that rely on script injection can be hidden or blocked by theme optimizers, ad blockers, or Shopify theme updates. Test widget placements and monitor the “views” metric so you do not hit quiet limits unexpectedly.

Integrations

Trustmary supports direct integrations with common CRMs like HubSpot and Pipedrive, spreadsheets, and connectors through Zapier and Make for broader automation. It also provides import options from major review sites and instructions for adding reviews to Shopify pages. Use the Trustmary integrations index to confirm a specific connector you need. (trustmary.com)

Edge case: Trustmary relies on Zapier/Make for many 3rd-party connections; if you want native Shopify-native triggers for post-purchase review requests without an intermediary, verify the exact flow in their docs or support before committing. (help.trustmary.com)

Support and documentation

Trustmary publishes a Help Center and offers direct support. The site markets either self-serve setup via templates or direct help for customers who need it. Expect standard documentation for survey templates and embed instructions. (trustmary.com)

Pros and cons

Pros:

• Focused NPS/testimonial workflow, easy to route promoters into public social proof.
• Free starter plan lets you trial testimonial widgets without upfront cost. (trustmary.com)

Cons:

• Many integrations require Zapier or manual embed work.
• Widget view limits and usage metrics require monitoring to avoid a hidden interruption.

Best for

Small merchants who want to capture NPS-style feedback and turn promoters into curated testimonials for product pages and marketing, without needing a full loyalty stack.

(See also a related comparison covering Trustmary and other review apps for extra perspective: Trustmary vs Judge.me vs Fera: Which Shopify review app Wins?)

Stamped.io

What it does

Stamped.io sells as an ecommerce reviews, loyalty, and lifecycle platform. Its Reviews product collects photo and video reviews, supports Q&A, and ties into post-purchase flows; separate Lifecycle and Loyalty products automate email/SMS and points/referrals. The vendor positions the offering as a combined retention suite for Shopify merchants. (stamped.io)

Pricing approach

Stamped uses productized pricing by product line. Public pricing pages show entry points for Reviews, Loyalty, and Lifecycle products, and list starting monthly price points for single products and multi-product bundles; their pricing page describes self-serve Shopify App Store plans and higher-touch enterprise offerings. If exact dollar amounts or limits matter for your shop, check Stamped’s pricing page or book a demo. (stamped.io)

Practical takeaway: Stamped is structured so you can buy just Reviews or bundle Loyalty and Lifecycle, which can simplify billing if you want an integrated retention stack.

Ease of setup and use

Stamped is built with ecommerce flows in mind: review request templates, prebuilt email sequences, and migration/import tools to bring legacy reviews in. The vendor notes quick launch options and onboarding resources for new customers; self-serve Shopify installs are common for smaller merchants. Expect to spend time customizing review request timing and templates to hit your desired conversion rates. (stamped.io)

Gotcha: configuring photo/video moderation, display widgets, and preventing duplicate requests requires attention. If you buy multiple Stamped products, coordinate settings to avoid overlapping automations.

Integrations

Stamped lists native integrations with Shopify and many marketing stack components such as Klaviyo, Attentive, and Gorgias, plus APIs for custom work. Their product pages and integration directory detail supported platforms and setup notes. (stamped.io)

Support and documentation

Stamped’s site describes onboarding support and a Help Center. They advertise availability seven days a week for support and migration assistance for customers moving reviews over. For enterprise customers, dedicated onboarding and a success manager are offered. (stamped.io)

Pros and cons

Pros:

• Reviews plus lifecycle and loyalty as separate but connected products, useful if you want to centralize retention.
• Native Shopify-first integrations and import tools for legacy reviews. (stamped.io)

Cons:

• Pricing can be steeper than single-purpose review widgets for very small shops; bundling multiple products increases cost.
• Feature overlap between Lifecycle and Loyalty requires configuration discipline to avoid redundant messages.

Best for

Small ecommerce brands that want reviews as part of a broader retention program, especially if they plan to add loyalty or lifecycle automation down the road.

Growave

What it does

Growave is an all-in-one Shopify app that bundles loyalty programs, referrals, product reviews, wishlists, and Instagram UGC into one package. It targets merchants who prefer a single app to replace multiple specialized apps. (growave.io)

Pricing approach

Growave publishes tiered plans with base monthly prices and included order volumes. Entry-level plans list a low base price with a prepaid number of monthly orders, and the site explains per-100-order overage charges. Higher tiers increase included orders, integrations, and support levels. Their pricing page includes the plan matrix and an FAQ on billing mechanics. Quote numbers should be confirmed on Growave’s pricing page for exact billing. (growave.io)

Practical takeaway: Growave’s bundle model can be cost-efficient if you would otherwise run separate apps for reviews, loyalty, and UGC. Watch the order-based limits so overages do not surprise your bill.

Ease of setup and use

Growave provides prebuilt templates for loyalty and review emails, widgets, and a dashboard to manage all product modules. Because it covers many features, initial setup takes longer than a single-purpose review app; expect to configure loyalty rules, referral links, and review request cadence. For a small team, prioritize the modules that move the needle first, and turn others on gradually. (growave.io)

Gotcha: consolidating multiple features into one UI means some modules are necessarily generalized. If you need deep customization on the reviews widget or loyalty rules, confirm that the plan level exposes the required settings or API access.

Integrations

Growave lists native Shopify integration and popular marketing connectors like Klaviyo, plus checkout and POS integrations for some plans. The product pages explain which integrations are included by plan tier and how many integrations are allowed. (growave.io)

Support and documentation

Growave advertises 24/7 email and live chat support on most plans, with higher tiers receiving a dedicated customer success manager and priority support. There is a Help Center article on charges and billing mechanics. (growave.io)

Pros and cons

Pros:

• Combines reviews, loyalty, referrals, and UGC, reducing the app footprint.
• Order-based pricing can be predictable for shops with steady volumes. (growave.io)

Cons:

• If you only need reviews, you may be paying for modules you do not use.
• Overage model requires monitoring monthly order counts; extra 100-order charges can add up.

Best for

Small shops that want multiple retention and social proof features under one bill and fewer moving parts in their Shopify app stack.

(For more on Growave alongside other multi-feature vendors, see Trustmary vs Yotpo vs Growave Compared)

People also ask

Trustmary alternatives?

Trustmary alternatives include product-review-first apps and testimonial tools. If your priority is automated product reviews and star ratings on Shopify product pages rather than NPS-driven testimonials, consider single-purpose review apps like Judge.me or Okendo. Compare specific features and pricing per app before switching. (See a comparison that lists Trustmary alongside other review tools for additional context.) (trustmary.com)

Stamped.io alternatives?

Stamped.io alternatives are other reviews-and-retention platforms that combine reviews with loyalty or lifecycle features, such as Yotpo and Okendo. If you want a cheaper, lightweight review-only alternative, look at single-focus apps on the Shopify App Store and compare import/migration support if you have legacy reviews to move. (stamped.io)

Growave alternatives?

Growave alternatives include other all-in-one marketing suites that bundle loyalty, referrals, and reviews. If you want similar consolidation, compare feature parity with providers that emphasize loyalty or with modular stacks that let you mix best-of-breed review widgets plus a loyalty app. Review the per-plan integration limits closely because bundling budgets and included order thresholds differ across vendors. (growave.io)

Three-Way Comparison

Situational Recommendations

• If you want NPS-driven testimonials and a lightweight, low-cost starting point: choose Trustmary. It is efficient for collecting promoter quotes and publishing on your website with minimal engineering work. Monitor the views/responses metrics after launch so widgets do not hide unexpectedly. (trustmary.com)

• If you expect to expand beyond reviews into loyalty and lifecycle messaging and prefer a vendor that sells those as connected products: choose Stamped.io. It works well for shops that want to unify review collection with points and lifecycle emails under one vendor, but budget for product-level pricing. (stamped.io)

• If you want to replace several single-purpose apps with one subscription and you will use reviews plus loyalty and referrals: choose Growave. It is a good fit when consolidation matters and when order-volume pricing feels more predictable than per-email or per-request billing. Watch order limits so you can budget overages. (growave.io)

• If you need photo and video reviews displayed on product pages quickly and want deep moderation controls: Stamped tends to expose those review display features in a way geared toward product pages and merchant workflows. Confirm the exact widget controls you need during a trial. (stamped.io)

• If you are extremely price-sensitive and only need review request emails, evaluate single-purpose review apps on the Shopify App Store first; they can be cheaper to start and simpler to operate. Also check how easy it is to import legacy reviews into any new app you pick. (trustmary.com)

Worth a Look: Zigpoll

Zigpoll is a Shopify-native survey app that offers post-purchase, on-site, and exit-intent surveys with a focus on zero-party data collection. If you are evaluating Shopify review apps and want a lightweight, native survey-first option to capture customer feedback and build email segments, Zigpoll is worth a look.

Related Reading

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