What is Raydium?
6 min read · updated 25 May 2026
Raydium is an automated market maker (AMM) and one of the oldest, largest decentralised exchanges on Solana. When you swap a token on-chain — especially a newer or smaller one — there's a strong chance the liquidity you're trading against sits in a Raydium pool, even if you reach it through an aggregator like Jupiter rather than Raydium's own interface.
A quick history
Raydium launched in early 2021, during Solana's first big DeFi wave. Its original design was unusual: rather than being a standalone AMM, it routed its liquidity into Serum, the on-chain central limit order book that anchored Solana DeFi at the time. That meant Raydium's liquidity providers also served Serum's order book, giving the whole ecosystem deeper markets.
When FTX and Serum collapsed in November 2022, that dependency became a liability. The community forked Serum into OpenBook, and Raydium leaned on its own AMM and pool infrastructure. The protocol survived the fallout (and a separate pool-authority exploit in December 2022 that it reimbursed) and remained one of Solana's core venues through the bear market and the 2024–2025 memecoin boom.
How an AMM works
Instead of matching buyers and sellers like a traditional exchange, an AMM holds pools of two tokens and prices trades with a formula. The classic version is the constant-product rule, x · y = k: as you buy one token out of the pool, its price rises along a curve. Liquidity providers (LPs) deposit both tokens into a pool and earn a share of every swap fee in return.
The catch for LPs is impermanent loss: if the two tokens' prices diverge a lot, you can end up worse off than simply holding them. Fees are the compensation for taking that risk.
Two kinds of pools
- Standard pools (constant product). Liquidity is spread evenly across all possible prices. Simple, robust, and the default for brand-new or volatile tokens.
- Concentrated liquidity (CLMM). Launched in 2023, these let LPs concentrate their capital in a chosen price range, earning far more fees per dollar when price stays in range — at the cost of more active management and sharper impermanent loss. (Compare with Orca's Whirlpools.)
Why it matters on Solana
- Memecoin liquidity. For a long stretch, tokens graduating from Pump.fun migrated their liquidity to Raydium, making it the default home for new-token trading. (Pump.fun later launched its own AMM, PumpSwap, and now routes graduations there — a meaningful shift in where that flow lands.)
- Permissionless markets. Anyone can spin up a pool for any token pair without approval, which is exactly why so much long-tail liquidity lives here.
- Aggregator backbone. Jupiter and other routers pull from Raydium pools, so you often use Raydium liquidity without ever visiting the site.
The RAY token
RAY is Raydium's native token. It's used for staking and incentive programs, and the protocol has run fee-based buybacks that tie RAY to actual trading activity. Raydium also operates AcceleRaytor, a launchpad that has bootstrapped new Solana projects' tokens and liquidity.
Risks to keep in mind
- Impermanent loss for LPs, especially in volatile or concentrated pools.
- Scam tokens. Because anyone can create a pool, the long tail is full of low-quality and malicious tokens. A pool existing says nothing about a token's legitimacy.
- Thin liquidity on small pools means high slippage — an aggregator usually gets you a better price than trading a single shallow pool directly.
For most people Raydium is invisible plumbing: you benefit from its liquidity every time a swap routes through it. For the latest Raydium news, see the Raydium project page.
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