We’re so used to financial services revolving around a central institution or authority, but what if users could transact directly with one another without the need for an intermediary? That’s what decentralized finance, or DeFi, is all about.
In this guide, we share what you need to know about DeFi, including its characteristics, how it works, how to get started, and popular DeFi platforms.
Definition of decentralized finance (DeFi)
Decentralized finance, or DeFi, is a financial system that allows people, businesses, and other entities to transact directly without the need for an intermediary. The core idea behind DeFi is to make financial services more open, accessible, affordable, and transparent by removing centralized third parties (like banks, exchanges, or brokerages) and allowing anyone with an internet connection and compatible cryptocurrency wallet to participate.
Key characteristics of DeFi
DeFi is built on blockchain technology and peer-to-peer (P2P) interactions. Instead of going through a bank, broker, or other financial institution, participants can transact directly using decentralized applications (DApps). Let’s take a look at the main characteristics that define DeFi.
Peer-to-peer (P2P) transactions
P2P transactions are one of the fundamental ideas behind DeFi, where two parties can exchange cryptocurrency for goods or services without having to involve a third party. These transactions are facilitated by smart contracts, which automatically carry out the terms of an agreement once certain conditions are met.
Accessibility
DeFi platforms are open to anyone with an internet connection and a compatible digital wallet. There are no geographic restrictions, long approval processes, or minimum account balances required, as with many traditional financial institutions. This is a huge feature that makes DeFi accessible to those who don’t have access to traditional banking or investment accounts, or live in countries with restrictive financial systems.
Low fees & negotiable terms
Transaction fees in DeFi are often lower than in traditional finance, since there’s no central institution or intermediary taking a cut. Lenders and borrowers can also negotiate interest rates directly through DeFi networks, which makes lending markets more flexible and competitive.
Security & transparency
Every DeFi transaction is recorded on a public blockchain, which acts as an immutable ledger, meaning transaction histories can’t be altered. The transactions are also available for anyone to review and verify, helping prevent fraud without revealing individual identities.
Autonomy & control
As the name implies, decentralized finance platforms operate without centralized ownership. This means users maintain control of their assets, reducing the risk of account freezes or relying on a single institution.
How DeFi works in practice
Let’s take a closer look at how DeFi works in practice.
The role of blockchain
Blockchain technology is at the heart of DeFi. This is a distributed and secure digital ledger that records transactions in ‘blocks’. Here’s a quick snapshot of how the blockchain works:
- Before a new transaction is added to the chain, it’s verified using automated consensus mechanisms
- Once it’s been recorded in a block, data can’t be changed without altering all subsequent blocks, which makes the system resistant to tampering
- All transactions on the blockchain are publicly visible, so anyone can audit or review while still keeping user identities private.
Digital wallets and private keys
Users need a digital wallet to interact with DeFi. This is a software application that stores the private keys (kind of like a password) needed to access and transfer cryptocurrency. When a user sends cryptocurrency, they’ll digitally sign a transaction with their private key, which the blockchain then verifies and records.
Decentralized apps (DApps) and smart contracts
DApps are software programs that run on blockchains and act as the user interface for DeFi services. This is what users access in order to:
- Lend or borrow funds directly from other users
- Trade cryptocurrencies without using centralized exchanges
- Earn interest by providing liquidity to decentralized markets
- Buy insurance or other financial products from decentralized pools.
These processes are all automated through the use of smart contracts, which are self-executing agreements coded into the blockchain. So if you want to lend cryptocurrency, for example, the smart contract will manage everything from tracking repayments to releasing funds when the loan is repaid.
DeFi protocols
Behind each DApp is a DeFi protocol, which is a set of smart contracts that defines the rules for that specific financial service. You can think of the DeFi protocol as being the actual engine that runs on the blockchain while the DApp is the interface users interact with.
Many DeFi protocols are open-source, so developers from all over the world can build on top of existing protocols to create new financial products and services. This is one of DeFi’s biggest strengths as it encourages innovation and provides users with more options and better solutions.
Popular use cases of DeFi
Now that we’ve covered the basics of DeFi and how it works, let’s look at some popular use cases.
Lending and borrowing platforms
DeFi lending platforms allow users to lend out their assets or borrow from others without the need for traditional financial intermediaries like banks.
Lenders deposit cryptocurrency into a smart contract, which then locks the funds and issues loans to borrowers. In most cases, borrowers must provide collateral, but some platforms offer flash loans, which require no collateral if they’re repaid within a single transaction.
Two examples of DeFi lending platforms are Aave and Compound. These protocols democratize access to liquidity and give crypto holders a way to earn interest (called yield farming). They also allow people to use crypto as collateral and take out a loan without relying on credit scores.
Decentralized exchanges (DEXs)
DEXs are one of the most popular use cases of DeFi. These use smart contracts or Automated Market Makers (AMMs) to allow users to trade cryptocurrencies directly from other users or liquidity pools, without the need for a centralized exchange. By eliminating the intermediary, DEXs reduce transaction fees and give users full access over their assets.
Two examples of decentralized exchanges are PancakeSwap and Uniswap.
Liquidity providers and yield farming
Liquidity providers facilitate trading and lending by depositing tokens into pools, which are then used by DEXs or lending platforms. In exchange for providing liquidity, users earn transaction fees or protocol rewards, a practice known as yield farming.
Yield farming can offer high potential returns, but it also comes with risks. Yearn Finance is one place users can earn passive income through yield farming.
Stablecoins and DeFi payment systems
Stablecoins are cryptocurrencies pegged to fiat currencies, usually the U.S. dollar. They reduce exposure to more volatile cryptocurrencies and act as a medium of exchange within DeFi applications. Examples include USDC, DAI, and Tether (USDT).
Insurance
DeFi insurance protocols protect users against things like hacks, smart contract failures, exchange insolvencies, and other vulnerabilities. They work similarly to traditional insurance: users pay funds into a coverage pool and claims are paid out according to rules set in the protocol’s smart contract.
One example of DeFi insurance is Nexus Mutual.
Synthetic assets
Synthetic assets use blockchain-backed instruments to provide exposure to traditional assets like stocks and commodities. They make it more accessible for investors to trade in the global markets without the need for traditional intermediaries.
Benefits of using DeFi
DeFi offers numerous advantages over traditional financial systems, including:
- Financial inclusion: Anyone, from anywhere in the world, can use DeFi so long as they have internet access and a digital wallet. This opens up financial services to the 1.4 billion adults around the world who currently don’t have access to a bank account.
- Transparency: DeFi is based on blockchain technology, which records all transactions in a public, immutable ledger. This means anyone can view and audit DeFi transactions in real time, reducing the risk of fraud while still protecting user identities.
- Security & control: DeFi also relies on the blockchain’s cryptographic security, which makes its protocols more resistant to fraud, censorship, and hacking. Users are also more in control of their assets and personal information, unlike traditional banks.
- Interoperability: Many DeFi projects are designed to work together, promoting innovation and expanding the variety of decentralized financial services available.
- Yield opportunities: DeFi offers new ways for users to earn passive income. For example, they can lend assets to earn interest, stake tokens to help secure a network, or provide liquidity to DEXs in return for a share of trading fees.
- Speed: Because DeFi operates 24/7, it supports instant or near-instant financial transactions anywhere in the world. This makes it especially valuable for cross-border payments, which can be slow and costly when made via traditional financial institutions.
Risks and challenges of DeFi
Like anything else, DeFi still has its own share of risks and challenges. These include:
- Complexity: DeFi can be tricky for beginners, since it requires an understanding of how to use wallets, interact with smart contracts, and manage private keys. It’s not very forgiving, either – if a user mistakenly sends funds to the wrong address or mismanages their private keys, it can result in permanent losses.
- Smart contract risks: Smart contracts can be exposed to coding vulnerabilities. If there are any bugs or loopholes, they can be exploited by hackers and lead to stolen funds.
- Price volatility: Most DeFi activity revolves around cryptocurrencies, which are highly volatile. Any major price swings can lead to unexpected losses (or gains).
- Regulatory uncertainty: DeFi is still evolving and operates with little regulation. There’s also the risk of future regulations restricting or shutting down certain DeFi activities.
- Lack of consumer protection: Traditional banks offer deposit insurance or legal protection for users, but this isn’t really a thing for most DeFi platforms. If a user lost funds due to a hack, scam, or error, there’s very little that can be done in terms of recovery.
- Potential for fraud: Being open and permissionless is one of DeFi’s benefits, but it also allows bad actors to create fake projects or execute scams like ‘rug pulls’, where developers drain liquidity from their own project and disappear. Since there’s no centralized oversight, it’s up to each individual user to conduct their own due diligence.
Comparison of DeFi with other financial systems
DeFi vs. traditional banking (TradFi)
One of the key differences between DeFi and TradFi is that traditional financial services (i.e. banking or investing) are overseen by government regulators and can only be accessed through intermediaries like banks or brokerage firms. These institutions set eligibility criteria (e.g. credit checks or ID verification), manage customer funds, and earn profits by lending deposits at higher rates than they pay depositors.
In DeFi, there’s no central bank or intermediary that controls access to financial services markets. So instead of depositing money with a bank and receiving a small portion of the interest, users can lend directly to borrowers and earn the full interest rate without the bank taking a cut. DeFi financial services firms also use cryptocurrency instead of fiat currencies.
DeFi vs. centralized finance (CeFi)
CeFi is similar to DeFi in that they both use cryptocurrencies and blockchain technology, but that’s really where the similarities end. Some key differences between the two include:
- Intermediaries: DeFi has no intermediaries, while CeFi still revolves around a centralized authority who controls user funds (e.g. brokerage or centralized crypto exchange).
- Control: In DeFi, users hold their own private keys and maintain custody of their funds, while in CeFi, they trust the platform to manage and protect their assets.
- Transparency: All DeFi transactions are recorded on a public blockchain, but CeFi transactions aren’t generally made public.
- Access: DeFi is permissionless, which means there’s no identity verification or geographic restrictions. CeFi, however, requires Know Your Customer (KYC) checks.
- Regulation: DeFi exists in a largely unregulated environment, while CeFi complies with regulatory requirements and oversight.
DeFi vs. Bitcoin and cryptocurrencies
Bitcoin and cryptocurrencies are a type of digital asset, they are not a financial system like DeFi.
How to get started with DeFi
Choose a DeFi wallet
The first thing you need to get started with DeFi is a digital wallet. This will store your cryptocurrencies and give you access to DeFi platforms directly from your browser or mobile device. Popular options include MetaMask and Trust Wallet.
Select a DeFi protocol or platform
Once you’ve set up your wallet, decide what DeFi activity you want to start with. Do you want to lend or borrow money? Stake cryptocurrencies? Yield farm? When choosing a protocol, make sure to check it’s secure and read user reviews before getting started.
Fund your wallet
Before you can start interacting with DeFi protocols, you’ll need to fund your wallet with some cryptocurrency. Here’s how to do that:
- Buy crypto on a centralized exchange like Coinbase or Binance
- Transfer the funds to your DeFi wallet by copying your wallet address and sending the crypto from your exchange account
- Make sure you have enough of the blockchain’s native token (e.g. ETH for Ethereum) to cover transaction fees
Connect to a DeFi App
You can use your wallet’s DApp browser (or a browser extension like MetaMask) to navigate to the DeFi platform you’ve chosen. Once there, you’ll be prompted to connect your wallet, which gives the DApp permission to read your balance and interact with your assets. You can then get started with your DeFi activities. Before entering the DeFi markets users should do their research and understand the risks.
Future outlook for DeFi
So, where do we see DeFI going in the future? Here are a few possibilities:
- DeFi continues to grow, picking up more users and expanding the range of available services
- DeFi could integrate with traditional finance to create a hybrid system
- Governments and regulators may introduce frameworks for consumer protection, investor safeguards, and anti-money laundering (AML) compliance, which could encourage more adoption.
