How to build trust on marketplace platforms
How to build trust on marketplace platforms: verification, reviews, clear rules and secure payments, explained by Code23.
How do you build trust on a marketplace platform? Use proportionate verification, make the rules visible, provide relevant history, secure the transaction and assign responsibility when something goes wrong. None of that stops every bad outcome, and none of it guarantees a first transaction. Done well, it lowers the risk enough that a stranger is willing to trade with another stranger.
We've built 50+ marketplaces at Code23 over 15+ years, and trust comes up early on almost all of them. A marketplace with no relevant verification, history or visible rules gives users less evidence on which to judge the transaction. A plain one that's upfront about who's involved, quick to sort out problems and honest when it gets something wrong stands a better chance.
Here's what actually builds that trust, in the order we'd tackle it.
Work out what they think the risks are
Some risks are real, some are imagined and unlikely to actually occur. Identify the risks users perceive, assess their likelihood and impact, then explain the controls and remedies without promising the risk cannot occur. Running a very small marketplace website doesn't remove the need to think about this. Proportionate safety, privacy and dispute controls still matter, even if people feel more comfortable transacting within a small group.
Transaction value is one factor; safety, privacy, delivery and reputational consequences can matter even when the price is low. Risk tolerance also varies by audience and transaction, so research your users rather than assume it from age.
Finally, what’s the worst thing that happens if trust is broken? This is another factor to take into consideration.
How to build trust on marketplace websites to overcome risk
Start by publishing clear rules and backing them with enforcement, support and dispute handling. Clear rules set expectations for everyone from the outset.
In addition, encourage customers and vendors to talk about themselves so everything is transparent. Profile pictures and bios can help buyers picture who they're dealing with, but treat them as a comfort signal, not identity proof.
Make it easy for vendors and customers to communicate with each other. Messaging can help answer questions and build comfort, but it needs privacy, reporting and moderation controls behind it, not just an open channel.
That level of functionality isn’t always going to be possible though. Nearly all marketplace websites have an option to set up an account using email verification, and most can add SMS phone verification too, usually a code sent by text that the user types back in. Email and phone checks can confirm control of an address or number, but they do not validate a person’s identity: people can set up fake email accounts, and a phone number alone doesn't prove who someone is.
Use proportionate identity or background checks only where the transaction and legal basis justify them.
Other ways of verifying someone's identity include a passport or driving licence check, if that matters for your marketplace. Likewise, if background checks matter (for example, if your marketplace involves hiring people for work), use proportionate checks with data-minimisation and retention controls; Standard and Enhanced DBS checks have role-specific eligibility rules, covered in the government's DBS eligibility guidance. None of these checks, alone or together, guarantees good behaviour.
Even with all these precautions in place, incidents can still occur, for example, a vendor failing to send an item to a customer, or an attempt at fraud. Transaction-gated, moderated reviews help both customers and vendors assess history, though they don't prevent fraud. Our guide to marketplace reviews goes into how to make that work well.
"Code23 totally redesigned and rebuilt my online marketplace (WowThankYou) nearly 3 years ago, and have continued to support the site, and us, ever since. When things go wrong, they are quick to sort it. When we have questions, they go out of their way to answer us... Without James and his team I couldn't guarantee we'd still be trading!"
If reviews are left after each transaction, a picture will soon be built up of the person involved. A review system may use ratings, written feedback or both, depending on what users need to assess. Reviews build a picture over time, but they don't prove that higher ratings support higher prices; treat them as one signal among several.
The great thing about a review system is that it is just as valuable to vendors and customers as it is to you. Visible transaction history may encourage accountable behaviour, but it does not guarantee it.
Just a few things to note about reviews. They are not error-proof. Accounts can be made purely to leave reviews. What’s more, negative reviews are likely to receive one in return which isn’t necessarily justified.
Finally, people tend to leave reviews if they are extremely happy or extremely unhappy and not so often if it’s somewhere in-between!
Having looked at trust between customers and vendors, we’ll now move on to trust with the marketplace i.e. you.
Along with ensuring your marketplace security is as strong as it can be, it’s important not to forget the importance of a good first impression. Clear, error-free design can support confidence in both vendors and customers, though it doesn't prove trustworthiness on its own. If your site is unattractive, clunky and full of errors (be they typos or poor photographs), people are more likely to assume your offering will be the same. We’ve written more about this in How do I successfully communicate my value proposition?
In the initial stages, with fewer transactions, close monitoring is easier. Define proportionate monitoring and moderation from launch, since trying to monitor everything isn't realistic or privacy-safe once you scale. As it grows, use content moderation tools to keep that proportionate.
Never lose sight of the fact that online marketplaces are there to solve problems. Marketplaces need to keep solving the promised problem and apply their rules consistently as they grow.
If you do have issues, deal with them swiftly and keep communication open. Our guide to marketplace dispute resolution covers how to handle it well. Never be afraid to apologise if an oversight on your marketplace caused a bad experience, and be specific about what you're changing so it's less likely to happen again. Follow your published refund and dispute policy, investigate the evidence and offer a remedy where it's warranted, rather than promising reimbursement in every case. If you deal with it well your reputation may actually improve.
Reduce direct counterparty risk by making platform responsibilities clear
Depending on the business you are in, it might be that your customers and vendors don’t need a trusting relationship between each other, they simply need to trust your marketplace business. There are a number of ways you can do this by reducing any perceived risk that goes with performing transactions on your site.
Make sure the transaction experience and payment methods are clear and designed to reduce avoidable risk, and be clear about what the platform will do if a transaction doesn't go to plan.
Use a secure payment system, like the ones covered in our guide to Stripe Connect for marketplaces, and consider refundable deposits, insurance or protection where the eligibility, coverage, fees, refunds and claims process are clear. Clear terms like that can also give vendors and customers less reason to complete transactions away from your site.
Payment technology keeps moving on, and newer methods can add extra layers of security. Payment controls complement verification, moderation, support and dispute handling; no single layer keeps a marketplace safe.
Frequently asked questions
How do you build trust between buyers and sellers in a marketplace?
Start with the basics: email and phone verification, ID checks where the transaction warrants it, and a review system both sides can see. Make it easy for buyers and sellers to message each other before committing to anything. None of that removes risk completely, but it may give users more evidence when deciding whether to deal with a stranger, which is a big part of what makes a marketplace work.
How do you ensure trust in a marketplace?
You can’t guarantee it, but you can stack the odds. Clear rules from day one, verified accounts, a reputation system that actually gets used, secure payments, and a team that responds fast and fairly when something does go wrong. We’ve built 50+ marketplaces at Code23 over 15+ years, and our experience helps us map the controls to the transaction: the ones that handle the bad moments well tend to keep trust better than the ones that only look good when nothing goes wrong.
Can a marketplace reduce risk without buyers and sellers trusting each other directly?
Yes. If your model doesn’t need person-to-person trust, put the marketplace itself in the middle: secure payments, refundable deposits or insurance with clear eligibility, coverage and claims terms, and a stated promise to sort things out if they go wrong. That may suit models that do not need public reputation histories, and clear terms like that give people less reason to push transactions off your platform.
Next step
Trust isn’t something you switch on. It’s verification, clear rules, a reputation system people actually use, secure payments, and a team that owns problems fast when they happen. Get those right and buyers and sellers have clearer information for judging the risk instead of treating your marketplace like something they have to manage.
If you’re building or growing a marketplace, our free Marketplace Growth Review is a 30-minute call that helps you work out where buyers and sellers hesitate and what would move the needle first. We’ve built 50+ marketplaces over 15+ years and use that experience to help map trust controls; the operator still owns policy and enforcement.
Build the marketplace
Start with the workflows that make the model work.
We’ll map buyers, sellers, payments and operations before the build, backed by experience from more than 50 marketplace projects.
