UTXO vs Account Model: How to Read Transactions on Different Chains
Bitcoin and Ethereum look nothing alike in a block explorer. That is the point.
Open a Bitcoin transaction on Blockchair and you see multiple inputs and outputs, a change address appearing as the numbers split and recombine like cash changing hands. Open an Ethereum transaction on Etherscan and you see a single balance delta. One sender. One receiver. A plain subtraction.
Both are valid. Both describe the same thing - a transfer of value. But the mental model is completely different.
Bitcoin's UTXO Model
Bitcoin does not have balances. It has unspent transaction outputs - UTXOs. Think of them as coins in a wallet. When you receive 0.5 BTC, that is one coin. When you receive 0.3 BTC, that is another coin. Your wallet holds a collection of these coins.
When you want to send 0.4 BTC, the wallet needs to pick coins that sum to at least that amount. It might choose the 0.5 BTC coin. That coin is consumed entirely. It cannot be partially spent.
So the transaction has one input (the 0.5 BTC coin) and two outputs. One output sends 0.4 BTC to the recipient; the other sends 0.1 BTC back to you as change, often to a new address generated by the wallet for privacy.
This is why Bitcoin transactions look like webs. Multiple inputs can combine, multiple outputs can split, and the change address is not a person - it is you getting your own money back.
Ethereum's Account Model
Ethereum does not use coins. It uses accounts. Each account has a single balance. A number. Nothing to split.
When you send 0.4 ETH, the balance decreases by 0.4 ETH. No coins are consumed. No change is returned. The transaction shows one sender, one receiver, one amount. Simple.
This is an account-based model, like a bank ledger. The state is the current balance. The transaction is a delta applied to that state.
Why the difference matters
The UTXO model is transparent. You can trace every coin back to its coinbase origin. Every input was once an output. The chain is a graph of value flowing from address to address. This makes Bitcoin excellent for auditability. It also means transactions are larger - each input must reference a previous output.
The account model is compact. A transaction is just a sender, a nonce, a receiver, and an amount. State grows linearly. But you cannot trace value as easily. You see the current balance, not the history of coins that composed it.
Solana uses the account model too. This site's asset, sonnyonsol.xyz, lives on Solana. As of the gathered data on August 31, 2026, its contract is FAJW358HjJ2mHXSHbHyxghfVGzX5SBoupdjRr2y9pump. It launched on Raydium on October 7, 2024. The pair had $25,952.03 in liquidity and a fully diluted value of $21,900. Volume in the prior 24 hours was $0.22, with one transaction across three pairs.
When you look at a Solana transaction on a Solana explorer, you see account debits and credits. No change addresses. No coin splitting. The model is closer to Ethereum than to Bitcoin.
Reading Both UIs
On Blockchair, look for the input list and the output list. Count them. If there are more outputs than recipients, one is likely change. The change address will be fresh - used only in this transaction. That is normal.
On Etherscan, look for the value field. That is the delta. The sender's balance goes down by exactly that amount; the receiver's goes up. No hidden outputs. No change.
Same transaction type. Different representation.
The UTXO model is older, coming from Bitcoin's original design, while the account model is more common among newer chains. Each has trade-offs. Neither is wrong.
Knowing which model your chain uses tells you what to expect in the explorer. Bitcoin transactions look busy. Ethereum transactions look clean. Both are telling the same story.
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