Appchains: advantages, disadvantages, and examples

What are appchains?

In the crypto industry, developers most often create general-purpose blockchains designed for standard transactions (transfers, swaps) and the operation of multifunctional decentralized applications (DApps). Examples of such blockchains include Ethereum, Solana, Cardano, Toncoin, and others.

However, the main drawback of general-purpose blockchains is that they are often poorly optimized for specific tasks and frequently experience congestion due to high transaction volumes. Appchains (application-specific blockchains) are designed to solve this problem.

What are appchains?

An appchain (application-specific blockchain) is a specialized blockchain designed and developed for a specific decentralized application (DApp).

In an appchain, the decentralized application is part of the blockchain itself and does not compete with other applications for resources. This allows for optimal performance with low latency and low transaction fees.

How do appchains work?

Appchains (application-specific blockchains) come in two types:

standalone,
dependent.

Standalone appchains have their own infrastructure developed exclusively for a specific decentralized application.

Dependent appchains operate on top of existing blockchains.

As a rule, every appchain has its own utility token (a digital asset on the blockchain) endowed with the same functions as native crypto assets in general-purpose blockchains.

As with general-purpose blockchains, appchains are maintained by special nodes called validators. They are responsible for processing transactions and maintaining the security of the appchain.

An appchain also has its own consensus mechanism that validators must reach when adding new transaction blocks. Most commonly, appchains use Proof-of-Stake (PoS) consensus mechanisms.

Developers also frequently use ZK-Proofs (zero-knowledge proofs) technology when creating appchains, allowing transactions to be finalized before confirmation in order to improve performance.

Advantages of appchains

One of the strongest advantages of an appchain is that it is tailored to a specific application, enabling better optimization and reducing delays caused by network congestion.

As a rule, appchains outperform general-purpose networks in terms of performance and can process thousands of transactions per second.

Other advantages of appchains include scalability and modularity. The narrow specialization of an appchain enables higher network throughput and lower latency for a specific decentralized application.

The modular architecture provides flexibility in configuring the network to meet the needs of a particular decentralized application. Modularity enables adding and modifying specific functions without compromising the operation of the entire appchain.

Disadvantages of appchains

The first disadvantage of appchains lies in the complexity of their development. This not only increases the time and resource costs of developing appchains but also requires additional expertise, including ensuring a high level of security.

The second issue concerns the security of appchains. If we talk about Layer 2 solutions*, meaning appchains operating on top of base networks, they are considered secure because they rely on validators at the first blockchain layer.

* Layer 2 (L2) solutions are scalable protocols operating on top of a Layer 1 blockchain and designed to increase network throughput, reduce latency, and lower transaction fees. Layer 2 solutions move part of the computation and transaction processing outside the main blockchain while periodically recording the final state on the Layer 1 network. As a result, they inherit the security of the base network while simultaneously improving blockchain efficiency.

However, if an appchain operates independently as a separate network, its security depends on the reliability of its own consensus mechanism.

In addition, standalone appchains fragment liquidity because they typically operate as closed ecosystems.

To solve this issue, developers have to rely on cross-chain bridges* (solutions for transferring assets between different networks). These bridges become vulnerable points of an appchain (application-specific blockchain), as they are frequent targets for hackers.

* Cross-chain bridges are interoperability protocols that enable the transfer of digital assets, messages, and data between independent blockchains. As a rule, bridges operate by locking assets in the original network and subsequently issuing wrapped versions of those assets on the target network. Cross-chain bridges provide interoperability between independent networks, such as between Ethereum and Bitcoin.

Examples of appchains

Avalanche subnets

Avalanche is a Layer 0 blockchain that provides infrastructure for creating Layer 1 networks (including appchains), which are referred to in the ecosystem as "subnets."

As of May 2026, Avalanche is the largest infrastructure for appchains with a market capitalization exceeding $4.3 billion.

The Avalanche ecosystem includes well-known appchains such as Pangolin, Trader Joe, and Snowball. Despite Avalanche being among the top thirty largest crypto ecosystems, none of its appchains has a market capitalization of $100 million.

Polkadot parachains

Polkadot, along with Avalanche, is one of the first ecosystems allowing the creation of interoperable appchains, also known as parachains*.

* Parachains are independent but interoperable blockchains within the Polkadot ecosystem. Parachains have their own execution logic, tokenomics (cryptoeconomics), and application mechanisms while sharing the common security and consensus mechanisms of the main Polkadot network. The parachain architecture enables the creation of highly specialized blockchains optimized for specific use cases such as gaming applications, identity systems, AI infrastructure, and other sectors.

Polkadot's market capitalization exceeds $2.2 billion, but its appchains, like those of Avalanche, have not demonstrated strong growth dynamics.

Notable examples of appchains within the Polkadot ecosystem include Kusama, Acala Network, Ocean Protocol, and Centrifuge. However, among them, only Kusama has a market capitalization exceeding $100 million.

Cosmos zones

Cosmos HUB provides infrastructure based on Inter-Blockchain Communication (IBC) technology, which enables the creation of interoperable appchains optimized for specific applications and games.

The Cosmos ecosystem includes dozens of well-known appchains, such as Kava, THORChain, Akash Network, and Secret Network. However, one of the most notable zones in the Cosmos ecosystem is the Osmosis appchain.

The Osmosis appchain introduced one of the first decentralized exchanges built on its own network with a built-in cross-chain bridge function (a solution for transferring assets between different networks).

The dYdX Appchain

dYdX is the first decentralized derivatives exchange in the cryptocurrency market, with derivatives integrated into the protocol back in 2020. During the DeFi (decentralized finance) boom in 2021, dYdX held a leading position among exchanges trading cryptocurrency-based derivatives.

However, dYdX originally operated as a regular decentralized application without its own blockchain. In the last quarter of 2023, the dYdX appchain, built on the Cosmos SDK, was launched.

The transition to its own appchain improved the performance and scalability of the dYdX exchange. Like many other appchains, dYdX has its own token (a digital asset on the blockchain), which, as of May 2026, is not even among the top one hundred cryptocurrencies and has a market capitalization below $140 million. This is partly because dYdX was outcompeted by stronger rivals such as Hyperliquid and Aster.