Stablecoins have become one of the most practical and popular tools for moving money on blockchains. They accounted for about 30% of all onchain crypto transactions in 2025. The various types of stablecoins operate in very different ways.Each design maintains its value stability for different reasons, which shape how reliable the asset is.

Below, we’ll explain how the main types of stablecoins work, how each one maintains its peg, and what they mean for businesses.

What’s in this article?

• What are the main types of stablecoins?
  
• How do fiat-backed stablecoins work?
  
• How do crypto-collateralized stablecoins work?
  
• How do algorithmic stablecoins work?
  
• What are the trade-offs behind each design?
  
• How can businesses compare stablecoin models?
  
• How Stripe can help
  

What are the main types of stablecoins?

Stablecoins are built to behave like digital dollars with stable value, moving across blockchains without the volatility typical of crypto.

There are three main models, each defined by how it maintains its value:

Fiat-backed stablecoins

Fiat-backed stablecoins are backed one-to-one by traditional currencies or short-term government assets held by an issuer. They’re the most widely used because of their straightforward, generally reliable pricing stability.

Crypto-collateralized stablecoins

Crypto-collateralized stablecoins are secured by crypto reserves locked in smart contracts, which are usually worth more than the stablecoins issued. Peg stability is maintained through incentives and onchain mechanics, instead of by a central issuer.

Algorithmic stablecoins

Algorithmic stablecoins attempt to maintain their value through programmed supply adjustments rather than hard collateral. They’re still experimental and past failures, such as TerraUSD’s collapse in 2022, show how fragile they can be when confidence falls.

How do fiat-backed stablecoins work?

Fiat-backed stablecoins follow a simple premise: each token corresponds to a unit of fiat currency held in reserve. They offer stable value, high liquidity, and broad acceptance, all of which make them a natural fit for payments, payouts, and treasury workflows without exposure to crypto volatility.

Here’s how they work:

• Reserves and issuance: An issuer holds cash or cash-like assets and mints tokens only when users deposit a fiat currency of equivalent value. This one-to-one structure gives the tokens predictable value.

• Redemptions and burning: Holders can return tokens for the underlying currency. Redeemed tokens are “burned” so the supply matches the reserves.

• Peg stability: If the token trades below the peg, traders buy the discount and redeem at full value. If it trades above the peg, new tokens can be minted and sold until the price normalizes.

• Transparency and trust: Because users rely on the issuer’s reserve management, reputable stablecoin issuers publish regular audits or attestations and hold high-quality, liquid assets.

• Regulatory oversight: Many jurisdictions require stricter reserve rules, licensing, and consumer protections. For example, the US’s GENIUS Act established stricter regulations that will go into effect by 2027. This regulatory environment is nudging fiat-backed stablecoins towards a more traditional financial instrument model.

How do crypto-collateralized stablecoins work?

Crypto-backed systems replace bank reserves with digital assets held in smart contracts, which enables stability without a centralized issuer. They’re popular in decentralized finance and among developers who value decentralization.

Here’s how they operate:

• Overcollateralization: Users deposit crypto worth more than the stablecoins they mint. The buffer helps the system remain solvent during price swings.

• Smart contract vaults: Collateral sits in transparent, onchain vaults. Users can add or withdraw collateral, as well as mint or repay stablecoins, without relying on intermediaries.

• Peg maintenance: If the token trades below its target, users can buy it cheaply and repay debt at full value. This reduces supply and nudges the price upward. If it trades above, they can mint more and sell them, which expands supply.

• Automatic liquidations: If collateral value falls too far, the protocol sells it to cover outstanding stablecoins. This preserves the overall backing.

• Governance and parameters: Token holders often vote on collateral types, rates, and liquidation penalties. These choices bolster the system’s resilience but introduce governance risk.

How do algorithmic stablecoins work?

Instead of relying on reserves, algorithmic stablecoins try to maintain their value through programmed monetary policy.

Here’s how:

• Supply as the stabilizer: When the price is above the target, the protocol mints extra tokens. When it’s below the target, it contracts supply, often by issuing separate “bond” or “share” tokens that mitigate volatility.

• Dual-token models: A secondary token absorbs risk, and it rises and falls based on demand to stabilize the system.

• Confidence as collateral: With no hard assets to back them, these systems rely on the belief that the mechanism will work. When confidence falters, the peg can quickly slip.

• Historical fragility: Several high-profile algorithmic stablecoins have collapsed during periods of stress, which shows that supply adjustments can’t keep pace with sharp drops in demand.

• Regulatory pushback: Some jurisdictions restrict these models due to their instability. This has prompted many teams to explore hybrid designs with partial collateral.

• Ongoing experimentation: Despite setbacks, algorithmic design remains a research area for teams that seek capital-efficient or decentralized forms of stable value.

What are the trade-offs behind each design?

Each approach balances stability, flexibility, and risk in different ways:

• Fiat-backed: These stablecoins are very stable yet dependent on the issuer’s governance and reserve quality. Poor oversight or risky investments can strain redemptions during stress.

• Crypto-collateralized: This model is highly transparent and decentralized but can be capital-intensive. Volatile collateral and smart contract risks can cause liquidations, short-term peg slips, or emergency protocol changes.

• Algorithmic: These tokens are light on capital but rely on holder confidence. Without hard collateral, they can unravel quickly when incentives stop working.

How can businesses compare stablecoin models?

The right model depends on your appetite for stability, transparency, and simplicity.

Consider the following:

• Regulatory fit: Global rules vary widely. Many companies choose stablecoins with clear licensing and well-defined reserve frameworks to avoid compliance surprises.

• Liquidity and reach: Widely used fiat-backed stablecoins like USDT (Tether) and USD Coin (USDC) provide the easiest conversions and broadest payment acceptance. Niche or experimental stablecoins can limit who you can transact with.

• Operational load: Established payment partners simplify integration with fiat-backed stablecoins. Crypto-backed and algorithmic options might require deeper technical expertise, collateral monitoring, and stricter risk management.

• Fit for purpose: Whether you prioritize settlement speed, international payment reach, or integration with crypto-native systems, evaluating stablecoins through concrete use cases clarifies which trade-offs matter the most.

How Stripe can help

Stripe Payments provides a unified, global payment solution that helps any business—from scaling startups to global enterprises—accept payments online, in person, and around the world. Businesses can accept stablecoin payments from almost anywhere in the world that settle as fiat in their Stripe balances.

How Stripe Payments can help you:

• Optimize your checkout experience: Create a frictionless customer experience and save thousands of engineering hours with prebuilt payment UIs and access to 125+ payment methods, including stablecoins and crypto.

• Expand to new markets faster: Reach customers worldwide and reduce the complexity and cost of multicurrency management with cross-border payment options, available in 195 countries across 135+ currencies.

• Unify payments in person and online: Build a unified commerce experience across online and in-person channels to personalize interactions, reward loyalty, and grow revenue.

• Improve payment performance: Increase revenue with a range of customizable, easy-to-configure payment tools, including no-code fraud protection and advanced capabilities to improve authorization rates.

• Move faster with a flexible, reliable platform for growth: Build on a platform designed to scale with you, with 99.999% historical uptime and industry-leading reliability.

Learn more about how Stripe Payments can power your online and in-person payments, or get started today.