You're choosing between two tradespeople, two brands, two restaurants. You do what everyone does: you check the reviews. Five stars, dozens of glowing comments, a flattering average. Decision made. Except a chunk of what you just read was never written by a real customer. Welcome to the blind spot of online commerce: the fake review industry.
This isn't fringe fraud. It's a structured, global market worth billions. And as long as a company's rating rests on the simple good faith of whoever posts it, that market will keep thriving. At Gron, we chose to look the problem in the eye, because it's the exact one we were built to solve.
How is a fake review made?
The public pictures a dishonest shop owner writing himself three compliments at the end of the day. The reality is far more industrial. Specialist providers, 'review farms', sell reputation the way others sell clicks. The price is well known, almost advertised: a few pounds per five-star review, packs of dozens delivered within days, options to space out posting so as not to raise suspicion.
Behind it, three ingredients show up every time:
- Throwaway accounts, created in bulk, with no real history, sometimes reused across dozens of unrelated businesses.
- Exchange networks, where entire groups rate each other in return for payment or a refunded product.
- Automated writing, now accelerated by language models that can produce a credible, nuanced, 'lived-in' review in seconds.
The result is formidable: these reviews no longer look like clumsy spam. They mention a specific product, drop a realistic detail, measure their enthusiasm. To the naked eye, you can no longer tell them apart from a genuine customer.
Why it's worse than it looks
A fake positive review doesn't just prettify a profile. It moves money. It steers a buyer toward a business that doesn't deserve it, at the expense of an honest competitor who doesn't cheat. In other words: cheating punishes those who play fair. That's the exact opposite of what a review system should do.
There's also the flip side, sneakier still: the fake negative review. Sinking a competitor with coordinated one-star ratings has become a commercial weapon. A serious small business can see its reputation wrecked overnight, without ever having had a single unhappy customer.
A review system that demands no proof doesn't measure how good a business is. It measures its ability to buy, or sabotage, a reputation.
Why moderation isn't enough
The platforms' usual answer is moderation: algorithms hunting suspicious behaviour, reports, after-the-fact takedowns. It helps, but it's a chase you can't win. You remove a fake review after it's been read a thousand times. You spot a network once the damage is done. And every smarter filter invites a quieter fraud.
The problem is structural: on most platforms, anyone can rate any business, whether they were a customer or not. As long as that door stays open, moderation only patches holes. You treat the symptom, never the cause.
Proof of purchase: change the rule, not the filter
At Gron, we took the problem from the other end. Rather than chasing fake reviews, we made their existence impossible at the root. Our rule is simple: no proof of purchase, no review. Before a review is published, it must be tied to a real transaction, a receipt, an order, an invoice. Without that proof, the review simply doesn't exist.
That shift changes everything. A review farm can generate a thousand accounts; it can't generate a thousand real purchases at a shop it never visited. The cost of cheating is no longer a few pounds: it becomes prohibitive, because you'd have to actually buy something to be able to lie. And at that point, it's not really a lie any more.
- Every review shown carries a 'Verified by proof of purchase' badge. You know what you're reading.
- Coordinated fake negative reviews collapse: you can't sabotage a business you've bought nothing from.
- A company's rating becomes what it should always have been: the reflection of its real customers.
What it changes for you
For a buyer, the difference is invisible day to day but huge on the decision: when you read a review on Gron, you know there's a person behind it who genuinely paid to live that experience. You're no longer betting on a stranger's sincerity, you're leaning on proof.
For an honest business, it's a relief. No more fearing the competitor buying stars or the anonymous overnight attack. The quality of the work becomes the only lever that counts. It's less spectacular than a doped-up fake average, but it lasts, and it's fair.
The fake review industry has thrived in the shadows for years because we accepted an absurd rule: take people at their word. Gron proposes the opposite. We don't ask you to trust us: we show you the proof. That's the whole project, and that's how online trust gets rebuilt.