Apps Like Offerup: 2022 Guide to Develop Your Buy and Sell App | Eastern Peak

Buy and sell apps market overview

The demand for e-commerce software is huge around the globe, and with more people preferring to shop digitally, it is bound to increase in years to come. On a global scale, the e-commerce market size exceeded $9 trillion in 2019 and is predicted to reach $27.17 trillion in 2027.

What is OfferUp?

Offerup is a marketplace app created after a merger of Offerup and LetGo. More specifically, Offerup bought LetGo in 2020 and the resulting product became much more feature rich and flexible than the original solution.

OfferUp alternatives

So what about other popular apps like Offerup? The range of other apps where you can buy and sell stuff is quite impressive. If you’re aiming to create a buy and sell app, check out the following services.


Letgo is the predecessor of Offerup, the original app that Offerup is based on. The platform is immensely popular and has over 100 million users. The minimalist interface, the autofill feature, and location-based advertising ensures that your item is shown to customers in your area and make the app stand out among competitors.


One of the major alternatives to Offerup for sellers targeting global customers. Although it is US-based, eBay ships to a number of countries around the globe, and allows people to look for products in their area with a zip code. The company is also one of the established e-commerce giants, and was among the first companies to have built an app like OfferUp.


Another global service available in almost 70 countries worldwide. It started as an email newsletter in the mid-90s and has grown to be a marketplace with 55 million users. On Craigslist users can browse a selection of categories, which include real estate and job searches.


This platform enables customers to run a garage sale online. Intended for local use, the software allows people to view various product listings and buy used goods from sellers in their areas. Anyone is free to join, but users have to provide their real Facebook accounts to view local ads and ensure an added layer of security. The goods also undergo human inspection before being listed for purchase.


A service that specializes in fashion items, both new and used ones. The platform features over 6000 brands and a selection of popular product categories.


It is a service where people can trade goods between themselves without using money. Trades are facilitated with Listia credits. You may also purchase things on Listia, however, users will have to buy credits in order to pay for things.


This app enables you to look for used things like clothes, shoes, household items, consumer electronics, and even cars. Shpock is free for sellers, while buyers are charged a small fee to help ensure secure and seamless deliveries. The platform works mostly in the UK but also operates internationally.

Functionality of apps like OfferUp

How to build an app like Offerup gets clearer, if you take a close look at the main characteristics of the selling apps.

  • Social media signup: using social media to sign up has already become a golden standard. Most of the digital online services offer this feature. Using their social media accounts to sign up also adds trustworthiness to users.
  • Home: this feature allows people to view the feed of popular items.
  • User Profile: both parties should be able to set up their profiles and provide a brief description about themselves and their products.
  • Categories: typically, apps like Offerup and Letgo will have them. For instance, a platform that sells apparel will feature categories like “women”, “men”, and “junior”.
  • Search: people should be able to use an advanced search option to look for preferred items.
  • Camera: a built-in camera will enable users to take pictures of items they want to sell and post them to their profiles.
  • Shopping cart: buyers should be able to add items to the cart and view them before concluding a purchase.
  • Messaging: message exchange or a voice chat between parties is one of the core features for this kind of app.
  • Payment system: a payment system for transferring money is a core feature for marketplace software.
  • Ratings and feedback: buying and selling things online requires a certain amount of trust. This feature helps parties prove their credibility.
  • Alerts: customizable notifications about new items, promotions, and discounts.
  • Item listings: users should be able to view information about a product, the seller and their ID as well as payment and shipping terms.
  • Recommendations: enabling customers to view product recommendations based on their previous purchases and searches.
  • Favorites: enabling users to add items to favorites so that they could purchase them later.
  • Customer support: users should be able to get support, if necessary.

Advanced features of buy and sell apps

If you want your app to perform more complex functions, below are some suggestions:

  • Multi language support: this feature is essential if you aim to create a marketplace platform that operates internationally.
  • Delivery services: a lot of firms running online that buy and sell platforms offer delivery services for their clients. Surely, introducing this feature will require careful preparation and additional planning.
  • Fraud protection: even the best buy and sell apps are not entirely free of fraudsters and scammers. Introducing a fraud protection system could be a huge advantage.
  • Price comparisons: allowing people to compare prices for similar products from different sellers could also be one of the advanced features that you could introduce.
  • Inventory management: helping sellers manage and make an inventory of their items would be a plus.
  • Virtual try ons: consider enhancing your solution with AR technology so that the buyers could visualize how the clothes or shoes would fit them.

A guide to create a marketplace app like OfferUp

Wondering how to create a buy and sell app? This overview will help you envision the conseсutive stages of building apps similar to Offerup.

Step 1: Research

Do your homework: look closely at your direct and indirect competitors, explore their strengths and weaknesses, and define your target user group. Insights into your audience’s age, income, and social background will help you create a top-notch selling platform.

Step 2: Choose revenue generation tactics

A critical aspect to decide on before you start developing. Because your monetization approach will impact the overall application architecture, knowing how exactly your app will be earning money is a keynote to success.

  • Transaction fees: charging a small chunk of money from each buyer-seller transaction.
  • In-app advertising: you can make money from showing ads on your platform, just ensure that your platform is not over-saturated with them.
  • Delivery fees: charging money for the delivery of goods purchased through your platform.
  • Featured listings: charging money for moving a particular position to the top of the list.

Step 3: Finalize the initial feature set

Next, you will need to decide which features will be included in the initial, tryout version of your app. If this version is a success, you will add more features as you work on the end product.

Step 4: Decide on a tech stack

The typical feature set for a buy and sell software will include the following:

Step 5: Build an attractive UI and UX

User experience may play a decisive role, so you will need to ensure excellent usability and a convenient UI.

Step 6: Integrate a payment system

No marketplace app is fully functional without a payment system, so your next step will involve integrating it into your platform.

Step 7: Think of viable marketing strategies

Ideally, you should start marketing your app while it is still in development. Knowing your audience will help you define your key promotion channels.

Step 8: Consider fraud prevention measures

To win users’ trust, your platform should integrate strong fraud prevention mechanisms so that users can rest assured that your app is free of scammers. Consider introducing refunds for items that never arrive or arrive in poor condition.

Final thoughts

Building sites like Offerup requires skills and experience, so you will need a reliable tech partner to create a solution with excellent UI and top-notch functionality.



Eastern Peak is a custom software development company which possesses deep expertise in working with startups and building intuitive mobile apps from ground up.

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Eastern Peak

Eastern Peak

Eastern Peak is a custom software development company which possesses deep expertise in working with startups and building intuitive mobile apps from ground up.