Arbitrum vs Optimism
Arbitrum (ARB) and Optimism (OP) both sit in the layer 2 category, so they compete for the same slot in a portfolio. Optimism launched in 2022, 1 year before Arbitrum. They share the same consensus mechanism (Rollup optimista sobre Ethereum). This page compares what can actually be verified about each protocol — nobody can tell you which will be worth more, and this page does not try to.
Cryptocurrencies are a highly volatile asset class without the protections of regulated funds: you can lose your entire investment. This comparison is educational content about the technical characteristics of two protocols, not a buy recommendation or a price forecast.
Head to head
Verifiable data for each protocol. Price and performance are deliberately left out: they change daily and cannot be derived from technical specs.
| Arbitrum | Optimism | |
|---|---|---|
| Symbol | ARB | OP |
| Launched | 2023 | 2022 |
| Consensus | Rollup optimista sobre Ethereum | Rollup optimista sobre Ethereum |
| Max supply | 10.000M | 4.290M |
| Category | Layer 2 | Layer 2 |
This table does not say which one is "better". It says how they differ, which is the only thing that can be stated without guessing.
Arbitrum
ARBThe Ethereum layer 2 with the most DeFi activity: same guarantees, much lower fees.
Optimism
OPA layer 2 whose software (OP Stack) also powers other major chains, such as Coinbase's Base.
Frequently asked questions
What is the difference between Arbitrum and Optimism?+
Arbitrum (ARB) launched in 2023, uses Rollup optimista sobre Ethereum and has a maximum supply of 10.000M. Optimism (OP) launched in 2022, uses Rollup optimista sobre Ethereum and has a maximum supply of 4.290M. Beyond the numbers, they were built for different purposes — see the description of each below.
Which one will be worth more?+
Nobody knows, and anyone telling you otherwise is guessing. Crypto prices depend on adoption, regulation, liquidity and sentiment, none of which can be forecast from a protocol's specs. This page deliberately compares only what is verifiable today.
Which has the scarcer supply?+
Both have a hard cap: 10.000M for Arbitrum and 4.290M for Optimism. A cap limits future issuance, but it says nothing about demand — and demand is what sets the price.
Do they use the same technology?+
Both secure the network with Rollup optimista sobre Ethereum, so on that specific point there is no difference between them. They still differ in their design goals and ecosystems.
Should I hold both?+
That is a question about your risk tolerance, not about these two protocols. Crypto is a volatile asset class where you can lose your entire investment, and holding two coins in the same category adds far less diversification than it looks — they tend to move together. This is educational content, not a recommendation.