OpenSea: Everything to Know

By  Beluga Research July 13, 2023

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  • OpenSea is a leading decentralized marketplace for buying, selling, and trading non-fungible tokens (NFTs)
  • It provides a platform for trading various types of NFTs, including digital art, collectibles, virtual land and more.
  • OpenSea allows individuals and businesses to create and list their own NFTs for sale on the marketplace.
  • To some users, the unregulated NFT market may seem too risky, leading them away from OpenSea


OpenSea is a peer-to-peer (P2P) marketplace for buying, selling, and trading non-fungible tokens (NFTs). NFTs are unique digital assets that represent ownership of a specific item, such as art, music, videos and more. Unlike traditional cryptocurrencies, NFTs are not interchangeable, and each token has a unique identifier that distinguishes it from others. OpenSea is built on the Ethereum blockchain.

OpenSea was launched in 2017, and since then, it has become one of the largest NFT marketplaces in the world.

A Brief History

OpenSea was founded by Devin Finzer and Alex Atallah in 2017. The two founders met while working at Pinterest, where they shared a passion for blockchain technology and NFTs. Also at that time, the NFT market was still in its early stages, and there was a lack of reliable and user-friendly marketplaces. Finzer and Atallah saw an opportunity to create a platform that would make it easy for anyone to buy, sell and trade NFTs.

In the early days, OpenSea was a simple marketplace with a limited selection of NFTs. However, as more artists, creators, and collectors joined the platform, it grew rapidly. In 2018, OpenSea raised $2 million in a seed round led by Blockchain Capital and 1confirmation. The funding allowed the team to expand the platform's features, improve the user experience, and attract more users.

In 2021, OpenSea experienced explosive growth, thanks to the NFT craze and the increasing interest in blockchain-based collectibles. The platform raised $23 million in a Series A funding round led by Andreessen Horowitz, and it added new features, such as the ability for users to create and sell their own NFTs.

What Is OpenSea?

OpenSea is a decentralized marketplace that allows users to buy, sell and trade NFTs. The platform is built on the Ethereum blockchain, which means that all transactions are transparent, secure and immutable. OpenSea is accessible to anyone with an internet connection, and it supports a wide range of NFT categories, including art, gaming, collectibles and more.

One of the most significant advantages of OpenSea is its user-friendly interface. Unlike other blockchain-based marketplaces, OpenSea is designed to be intuitive and easy to use, even for beginners. Users can browse the platform's vast selection of NFTs, filter them by category, price, and popularity, and make a purchase with just a few clicks.

OpenSea also offers a range of tools and features that make it easy for creators to sell their own NFTs. Specifically, users may use OpenSea to create their own NFTs, set a price, and list them for sale on the platform. OpenSea handles all the technical aspects of the transaction, such as the transfer of ownership and payment processing, making it easy for anyone to monetize their digital creations.

Another advantage of OpenSea is its community-driven approach. The platform has a community of artists, collectors and enthusiasts who share NFTs, collaborate on project and provide feedback and support. OpenSea also supports a range of third-party tools and integrations, such as wallets, market analysis and social media.

Getting Started

To get started with OpenSea, users need to create an account and connect it to a digital wallet that supports Ethereum, such as MetaMask. Once the wallet is connected, users can browse the marketplace to find items that they are interested in buying. OpenSea offers a wide variety of digital assets, including art, music, domain names, virtual real estate and more.

When users find an item that they want to buy, they can place a bid or purchase it outright if it has a fixed price. All transactions on OpenSea are conducted in ether (ETH), which is the native cryptocurrency of the Ethereum blockchain. Once a transaction is complete, the digital asset is transferred to the buyer's wallet.

Unique Aspects

One of the unique aspects of OpenSea is the ability for creators to mint their own NFTs and list them for sale on the marketplace. This allows artists, musicians, and other creators to monetize their digital creations in a way that was not possible before the advent of blockchain technology. Additionally, because NFTs are unique and stored on a blockchain, they can be used to prove ownership and authenticity of digital assets.

Another unique aspect of OpenSea is the ability to trade NFTs on a secondary market. This means that users can buy and sell NFTs that they already own, just like they would with physical assets such as stocks or real estate. This has created a new economy around digital assets, with some NFTs selling for millions of dollars.

OpenSea also offers a variety of tools for developers to build on top of their platform. This has led to the creation of a wide range of decentralized applications (Dapps) that use OpenSea as a marketplace for their digital assets. Some of these dapps include virtual worlds, games, and social networks.


  • User-Friendly Interface. OpenSea has a user-friendly interface that makes it easy for anyone to buy, sell or trade NFTs. The platform is easy to navigate, and users can quickly find the NFTs they are looking for.
  • Large Selection of NFTs. OpenSea has a large selection of NFTs available for purchase, including art, gaming items, collectibles and more. Users can also find rare and unique items that they may not find anywhere else.
  • Decentralized. OpenSea is a decentralized platform, which means that users have full control over their NFTs. The platform does not hold any user funds or NFTs, and users can interact with the platform directly from their wallets.
  • Low Fees. OpenSea has low fees compared to other NFT marketplaces, making it an attractive option for buyers and sellers. The platform charges a 2.5% fee on sales, which is lower than many other platforms.
  • Interoperability. OpenSea supports interoperability, which means that users can buy, sell and trade NFTs across multiple blockchains. This allows users to access a larger pool of NFTs and increases liquidity.


  • High Gas Fees. Like many other Ethereum-based platforms, OpenSea is subject to high gas fees. These fees can make it expensive to buy or sell NFTs, especially for smaller transactions.
  • Lack of regulation. The NFT market is currently unregulated, which means that there is a risk of fraud or scams. OpenSea has taken steps to address this issue, but it is still a concern for some users.
  • Limited Payment Options. OpenSea only accepts payments in ether and some other cryptocurrencies, which may limit the number of potential buyers and sellers.
  • Environmental Impact. The Ethereum blockchain, like many other blockchains, requires a significant amount of energy to operate. This energy consumption has raised concerns about the environmental impact of NFTs and blockchain technology.