GlossaryReviews
Review Portability
Review portability is how completely a store's reviews can leave one app and work in another: not whether an export button exists, but whether the file it produces still carries the photos, the dates, the verified flags, and the product identifiers a new app needs to rebuild the same page.
Also known as review data ownership, review app lock-in
Every other part of a Shopify stack can be replaced with money. A theme can be rebuilt, an email list can be migrated in an afternoon, a shipping app can be swapped between orders. Reviews are the exception, because they are the accumulated output of customers who are not going to write them again. That is why the question of what you can take with you is a purchase decision rather than a leaving decision, and why it is worth answering before you install anything rather than at the point you want out.
An export button is not portability. What matters is what is inside the file. A review is not one field, it is roughly eight: the rating, the text, the author name, the date it was written, whether the buyer was verified, the merchant reply, any images or video, and the product it belongs to. A CSV that carries the first four and drops the rest is a real export and a poor migration, because the parts most likely to go missing are the parts that took longest to earn.
Three fields break more often than the others. Images are usually not in the file at all, only links to them, and those links point at storage the old vendor pays for, so what happens to them after the account closes is a question for that vendor's documentation rather than an assumption you can safely make. Verified status is a flag one app set from order data it held, and a new app has no independent basis to trust it, so it can arrive as an unverified review or not arrive at all. And the product identifier is the join key for the whole import: if the file names products by one app's internal ID, or by a handle that has since changed, rows land on the wrong product or on nothing.
Consider a Shopify store selling technical outerwear with about 1,900 reviews collected over four years. The export runs, the CSV has 1,900 rows, and the merchant treats the migration as done. The import lands roughly two thirds of them. The failures split three ways: a batch of products had their handles rewritten during a collection restructure two years earlier, so those rows match nothing; the photo columns hold URLs on the previous vendor's domain, which are outside the store's control once the subscription ends; and the verified badges come back blank because the receiving app verifies against orders it has processed itself. The product pages still show a good average. They show fewer reviews than the store has, and almost none of the customer photos, which were the reason the store paid for that app in the first place.
The test is cheap and almost nobody runs it. Before committing to an app, collect ten reviews with photos, export them, and open the file. Count the columns. Check whether an image is a file or a link. Check what the product is called and whether that name is stable in your store. That fifteen minutes tells you more about your exit than any comparison table, including ours. Repeat it on a schedule once you are live, because an export you have never opened is a backup you do not have.
The honest framing is that this is a question a merchant should ask every review vendor, BeyondReviews included, and that the answer is a file rather than a sentence on a marketing page. An app that makes leaving cheap is not being generous; it is accepting that it has to be worth staying for. Rights over the data are a separate matter from the mechanics of moving it, and they sit in the app's own terms and data-processing agreement, so read those for who may keep what and for how long rather than assuming the platform settles it.