Stamped

What Is Stamped?

Stamped is an ecommerce reviews, ratings, and loyalty platform that helps online stores collect customer feedback, display star ratings and photo reviews, and run points-and-rewards programs that bring shoppers back. It is best known in the Shopify ecosystem, where it is a long-established app, but it also serves merchants on other platforms that want user-generated content and a loyalty program from a single vendor.

At its core, Stamped does two related jobs. The first is reviews and ratings: it automatically emails buyers after a purchase, gathers their written reviews, star ratings, photos, and videos, and then renders that social proof on product pages, collection pages, and in search results. The second is loyalty and rewards: it lets a store award points for purchases, referrals, and other actions, and redeem them for discounts, turning one-time buyers into repeat customers. Bundling both under one platform is a deliberate positioning choice, because reviews and loyalty are the two levers most directly tied to conversion and retention for a typical direct-to-consumer brand.

Stamped is a hosted SaaS product, not a browser extension or a self-installed script you build yourself. A merchant installs it through their ecommerce platform's app store or adds a small snippet to their theme, and from that point Stamped's servers handle review collection, moderation, storage, and the widgets that appear on the storefront. The review content itself lives in Stamped's infrastructure and is served to visitors through embedded widgets and an API.

It helps to understand who Stamped is for. The platform targets small and mid-size ecommerce brands, especially those on Shopify, that want a polished review experience and a loyalty program without stitching together separate vendors. Where an enterprise might license a heavyweight user-generated-content suite with deep integrations, a growing DTC store typically wants something that installs quickly, looks good on the storefront out of the box, and scales in price with the size of the catalog and order volume. That positioning explains many of Stamped's product decisions, from its tight Shopify integration to its emphasis on visual, photo-and-video reviews that perform well for consumer products.

How Stamped Works

Stamped operates on a familiar review-platform loop. When a customer completes a purchase, the store's ecommerce platform notifies Stamped, which schedules an automated review-request email (and optionally SMS) timed to arrive after the product is likely to have been delivered. That message invites the buyer to leave a rating, written review, and media, often using an in-email form so the shopper can submit a star rating without leaving their inbox.

Collected reviews flow into a moderation dashboard where the merchant can approve, reply to, or flag submissions before they appear publicly. Approved reviews are then displayed on the storefront through embedded widgets: a star-rating badge near the product title, a full reviews section lower on the product page, carousels of featured reviews, and site-wide testimonial displays. Because the widgets pull live data from Stamped, new reviews appear without the merchant editing the theme.

On the loyalty side, Stamped tracks customer actions, purchases, account creation, referrals, social follows, and awards points according to rules the merchant configures. A rewards launcher (a small on-site widget, often a tab or floating button) lets shoppers see their balance, view ways to earn, and redeem points for discount codes. Referral features generate unique links so existing customers can invite friends in exchange for points or credit.

Two technical details matter for how Stamped behaves on a page. First, the review widgets rely on JavaScript loaded from Stamped's content delivery network, so the social proof is injected client-side after the page's core HTML loads. Second, Stamped publishes structured data: it can output review and aggregate-rating schema markup (JSON-LD or microdata) so that star ratings become eligible to appear as rich results in search engines. This combination, a third-party script that injects widgets plus structured data describing the ratings, is exactly what makes Stamped recognizable from the outside.

Stamped also exposes integrations and an API so the review and loyalty data can flow into the rest of a store's stack, email and SMS marketing tools, helpdesk software, advertising platforms, and analytics. For a merchant, this means reviews can be syndicated into post-purchase email flows and loyalty status can inform segmentation, all without manual exports. That interoperability is part of why brands adopt a dedicated platform rather than relying on whatever minimal review feature their ecommerce system includes natively.

How to Tell if a Website Uses Stamped

Stamped leaves several reliable fingerprints. Because StackOptic analyzes a URL from the server side, it looks at the same signals you can check manually with browser tools, View Source, or a detection extension.

Script and CDN domains. The strongest signal is a request to Stamped's asset domains. Storefronts commonly load Stamped's JavaScript from hosts on stamped.io and its static CDN (historically cdn-stamped-io style hosts and staticw2-style asset subdomains). Seeing a script tag pointing at a stamped.io host is close to definitive.

DOM containers and widget markup. Stamped injects recognizable elements into the page, for example containers and class names built around a stamped prefix (such as a main widget wrapper, star-rating elements, and a reviews badge). Inspecting the product page's HTML around the rating display usually reveals these stamped-prefixed hooks.

JavaScript globals and data attributes. The widget initializes via a global configuration object and data attributes that carry the store's Stamped identifiers (a public API key and a store hash/URL). Finding these data- attributes near the widget, or the initialization object in the page scripts, confirms the platform.

Review schema near the widget. Stamped-rendered ratings are frequently accompanied by Review and AggregateRating structured data. While schema alone does not prove Stamped (many tools emit it), schema paired with stamped.io script requests is a strong combined signal.

Here is how to check each signal yourself:

Method	What to do	What Stamped reveals
View Source	Open a product page, right-click, "View Page Source"	stamped.io script URLs, stamped-prefixed containers, public API key in data attributes
Browser DevTools (Network)	Open DevTools, reload, filter requests	Calls to stamped.io / Stamped CDN hosts for JS and review data
Browser DevTools (Elements)	Inspect the star rating and reviews section	stamped-prefixed classes and data- attributes around the widget
Wappalyzer	Run the extension on the live page	Flags "Stamped" under reviews when its script is present
BuiltWith	Look up the domain	Current and historical Stamped detection plus the rest of the stack

A quick command-line check is curl -s https://example.com/products/some-product | grep -i "stamped". If that returns script URLs or stamped-prefixed markup, the store is almost certainly running Stamped. Because Stamped is so common on Shopify, it is worth confirming the underlying platform too; our guides on how to find out what ecommerce platform a website uses and how to tell if a website is built with Shopify pair naturally with this check, and the broader methodology lives in how to find out what technology a website uses.

It is worth noting how these signals behave on real stores. The review widgets load client-side, so a quick glance at static HTML may show the empty widget container and the initialization script before any reviews are populated, the markup and stamped.io requests are present even if the stars have not yet rendered. Some merchants lazy-load the widget to protect page speed, which can delay the network requests until the reviews section scrolls into view; in that case the Network tab still captures the call once triggered. Occasionally a store proxies assets through its own domain, but the stamped-prefixed DOM hooks and the public API key in the widget configuration are difficult to disguise because the widget genuinely depends on them. Combining several signals, a request to a stamped.io host, stamped-prefixed containers, and the configuration object, produces a confident verdict. Server-side analysis is especially useful here because it fetches the raw HTML and can inspect the embedded script references directly, without waiting on the browser to execute and lazy-load the widget.

Key Features

• Automated review collection. Post-purchase email and SMS requests, including in-email rating forms, to maximize the response rate.
• Photo and video reviews. Visual user-generated content that tends to convert well for consumer products.
• On-site widgets. Star badges, full review sections, carousels, and testimonial displays that update automatically as reviews arrive.
• Loyalty and rewards. Points for purchases and actions, a rewards launcher, and configurable redemption rules.
• Referrals. Unique referral links that reward existing customers for bringing in new ones.
• Rich-result schema. Review and aggregate-rating structured data to make star ratings eligible for search rich snippets.
• Integrations and API. Connections to email/SMS marketing, helpdesk, ads, and analytics, plus an API for custom workflows.

Pros and Cons

Pros

• Combines reviews and loyalty in one platform, reducing the number of vendors a store must manage.
• Deep, well-established Shopify integration with quick installation.
• Strong support for photo and video reviews, which lift conversion for many product categories.
• Outputs review schema that can earn rich-result star ratings in search.

Cons

• Client-side widgets add JavaScript that can affect page-speed metrics if not managed carefully.
• Pricing scales with order volume and feature tier, which can grow as a store grows.
• The combined reviews-plus-loyalty model may be more than a merchant who only needs one of the two requires.
• Advanced customization of widget styling sometimes requires theme or CSS work.

Stamped vs Alternatives

Stamped competes with other ecommerce review and loyalty platforms, several of which are also popular on Shopify. The table below compares it with common alternatives.

Platform	Primary focus	Notable strength	Best for
Stamped	Reviews plus loyalty	Two functions in one platform	DTC brands wanting reviews and rewards together
Yotpo	Reviews, loyalty, SMS suite	Broad marketing suite at scale	Brands consolidating UGC and messaging
Judge.me	Product reviews	Affordable, lightweight reviews	Cost-conscious stores focused on reviews
Loox	Photo and video reviews	Visual-first review displays	Stores leaning on photo social proof
Okendo	Reviews and UGC	Attribute ratings and rich profiles	Brands wanting detailed structured reviews

If you suspect a store uses a different review tool, the same detection techniques apply, look for the vendor's script domain and DOM hooks. You can also compare Stamped with another widely used reviews platform like Trustpilot to see how their fingerprints and feature sets differ. For lead and competitive research, recognizing which review app a store runs is a meaningful technographic signal, as explained in what is technographics and using tech-stack data to qualify leads.

Use Cases

Stamped is most at home on direct-to-consumer ecommerce stores that depend on social proof to convert shoppers. A growing Shopify brand uses it to collect photo reviews after each order, display star ratings on product pages, and earn rich-result snippets that improve click-through from search. The same brand runs a points program through Stamped to reward repeat purchases and referrals, increasing customer lifetime value without adding another vendor.

It also suits stores that have hit the limits of a basic, native review feature and want automated collection, moderation, and richer display options. Merchants in visually driven categories, apparel, beauty, home goods, food and beverage, benefit from photo and video reviews that show real customers using the product. Brands focused on retention layer the loyalty program on top, so the reviews program feeds acquisition and conversion while the rewards program drives repeat business.

Consider a few concrete scenarios. A skincare brand on Shopify might send an automated review request a week after delivery, gather before-and-after photos, and surface a curated carousel of five-star reviews on its bestselling product page, while awarding points that customers redeem on their next order. A coffee subscription store might use referral links to let happy customers invite friends for a discount, tracking the whole loop in Stamped. A mid-size apparel retailer migrating from a bare-bones review widget might adopt Stamped specifically for its schema output and moderation tools.

From a sales-intelligence perspective, detecting Stamped on a store's site is a useful signal in its own right. It indicates an ecommerce brand that takes social proof and retention seriously, likely on Shopify, and that is comfortable paying for dedicated marketing technology. For vendors selling complementary tools, email and SMS platforms, subscription apps, helpdesk software, that profile is a strong qualifier. For agencies, spotting which review and loyalty app a prospect uses across many stores helps size opportunities and tailor a pitch, and surfacing that signal automatically is exactly what a technology-detection scan delivers in seconds.

Frequently Asked Questions

What is Stamped used for?

Stamped is used by ecommerce stores to collect and display customer reviews and ratings, and to run loyalty and rewards programs. After a purchase it automatically requests a review by email or SMS, gathers written feedback plus photos and videos, and shows that social proof on product pages. Its loyalty side awards points for purchases, referrals, and other actions, which shoppers redeem for discounts.

How can I tell if a Shopify store uses Stamped?

View the source of a product page and look for script URLs on stamped.io (or Stamped's CDN), stamped-prefixed container classes around the star rating, and a public API key in the widget's data attributes. The Network tab in DevTools will show requests to Stamped's hosts, and extensions like Wappalyzer or BuiltWith flag it. A quick curl -s URL | grep -i stamped on a product page usually reveals it.

Does Stamped help with SEO?

Indirectly, yes. Stamped can output Review and AggregateRating structured data, which makes a product's star rating eligible to appear as a rich result in search engines, improving how the listing looks and potentially its click-through rate. The reviews themselves also add fresh, keyword-relevant user-generated content to product pages. As always, the rating must be genuine and the markup correctly implemented for search engines to display it.

Is Stamped only for Shopify?

No. Stamped is most popular and most deeply integrated on Shopify, but it also supports other ecommerce platforms. The review-collection loop and loyalty features work across platforms, though the depth of integration and the exact installation steps vary. If you detect Stamped, it is still worth confirming the underlying ecommerce platform separately, since the two are independent layers of the stack.

Does Stamped slow down a website?

Because Stamped renders its widgets with client-side JavaScript loaded from its CDN, it does add resources to the page, like any third-party review tool. Stamped offers techniques such as lazy-loading the reviews section to limit the impact on initial load and Core Web Vitals. The practical effect depends on how many widgets a store uses and how the theme is built, so merchants should test page speed after installing and configuring it.

Want to detect Stamped and the rest of a store's stack automatically? Run any URL through StackOptic at https://stackoptic.com.