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Arbitrum vs Solana
ARB vs SOL
Two of crypto’s most-discussed assets, side-by-side. Key differences, recent coverage from TheChainPost, and an FAQ for both — no investment advice, no price predictions.
Layer 2
Arbitrum (ARB)
Largest Ethereum L2 by TVL. Optimistic rollup, Stylus (Rust) support.
- Launched
- 2021
- Consensus
- Optimistic Rollup (Ethereum L2)
Layer 1
Solana (SOL)
High-throughput Layer 1. Sub-cent fees, consumer-scale apps, memecoin volume.
- Launched
- 2020
- Consensus
- Proof-of-Stake + Proof-of-History
At a glance
| Arbitrum (ARB) | Solana (SOL) | |
|---|---|---|
| Launched | 2021 | 2020 |
| Consensus | Optimistic Rollup (Ethereum L2) | Proof-of-Stake + Proof-of-History |
| Category | Layer 2 | Layer 1 |
Latest ARB + SOL coverage
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Arbitrum vs Solana FAQ
- What is Arbitrum?
- Arbitrum is an optimistic rollup on Ethereum built by Offchain Labs. Mainnet launched August 2021 as Arbitrum One; a second chain — Arbitrum Nova — targets gaming/social with AnyTrust data availability. By early 2026 it is consistently the largest L2 by TVL, rivalled only by Base.
- What does "optimistic rollup" mean?
- Transactions posted to L1 are assumed valid by default. A 7-day challenge window lets any watcher submit a fraud proof to revert fraudulent batches. The sequencer (currently centralised, operated by Offchain Labs) orders transactions; decentralising it is on the roadmap. Security ultimately inherits from Ethereum.
- What is Solana?
- Solana (SOL) is a high-throughput blockchain launched in 2020. It combines proof-of-stake with a clock-like mechanism called Proof of History to process thousands of transactions per second at sub-cent fees, making it popular for DeFi, NFTs, and memecoins.
- Why does Solana have low fees?
- Solana processes transactions in parallel and compresses state into a single global chain, rather than splitting workload across L2 rollups like Ethereum does. The trade-off is higher hardware requirements for validators and occasional network congestion.
- How do Arbitrum and Solana compare?
- Arbitrum (ARB): Largest Ethereum L2 by TVL. Optimistic rollup, Stylus (Rust) support. Launched 2021, runs Optimistic Rollup (Ethereum L2). Solana (SOL): High-throughput Layer 1. Sub-cent fees, consumer-scale apps, memecoin volume. Launched 2020, runs Proof-of-Stake + Proof-of-History. These are two structurally different designs — read the news feed above for recent developments on each, and consult a qualified advisor before making any financial decision.
General information, not investment advice. Cryptocurrencies are volatile — do your own research and consult a qualified advisor before making decisions.