When you send ETH from Ethereum to Solana, or swap BTC for AVAX without using an exchange, you’re using blockchain interoperability, the ability of different blockchains to communicate, share data, and transfer assets securely. Also known as cross-chain communication, it’s what lets you use DeFi apps on one chain while holding assets on another—no need to choose sides. Before this, each blockchain was its own island. Now, they’re starting to connect like roads on a map.
At the heart of this are tools like token bridging, a process that locks assets on one chain and mints equivalent tokens on another. Think of it like exchanging a voucher: you give your USDC on Ethereum, and get wrapped USDC on Polygon. But bridges aren’t perfect—some have been hacked, and others are slow. That’s why DEX aggregators, platforms that find the best cross-chain swap routes across multiple networks like OpenOcean and OpenSwap are growing fast. They don’t just move tokens—they find the cheapest, fastest path, saving you gas and time.
It’s not just about swapping. Interoperability lets DAOs run across chains, NFTs be used in games on different networks, and DeFi protocols pool liquidity from Ethereum, Solana, and beyond. That’s why you’ll see posts here about cross-chain swap tools, multi-chain exchanges like Aster and OpenOcean, and how projects like Automata Network and Sei are building the hidden plumbing that makes it all work. Some of these systems are still early. Others are already handling millions in daily volume. Either way, if you’re trading, staking, or just holding crypto today, you’re already affected by interoperability—even if you don’t realize it.
Below, you’ll find real guides on the tools, tokens, and exchanges making this happen. No fluff. Just what works, what’s risky, and what’s coming next.
Discover the top wrapped assets by trading volume in 2025, including wBTC, wETH, and wUSDC. Learn how these digital twins power cross-chain DeFi and why their volume matters more than market cap.