What is LetsBonk.fun? How bonk.fun compares with pump.fun

Bonk.fun vs pump.fun comes down to fees and plumbing, not the curve. Both are Solana memecoin launchpads with nearly identical bonding curves. Bonk.fun (LetsBonk.fun) runs on Raydium LaunchLab, states a 1% curve fee against pump.fun's 1.25%, and graduates coins to Raydium pools that charged 0.25% on the configs we checked.

What is LetsBonk.fun?

LetsBonk.fun, now usually shortened to bonk.fun, is a launchpad tied to the BONK community. Anyone can create a coin with a name, ticker and image; it trades on a bonding curve from its first second and graduates to a regular pool when the curve sells out. Its coins are easy to recognise because their contract addresses end in bonk.

The difference is underneath: pump.fun runs its own programs, while LetsBonk is a front end on Raydium LaunchLab. LaunchLab is Raydium's launchpad infrastructure, which lets a platform configure its own curves and fee shares and graduates coins into Raydium pools. Other platforms run on LaunchLab too; LetsBonk is the best known.

Which launchpad has more volume?

Market share has swung more than once. In mid-2025 LetsBonk briefly took the larger share of Solana launchpad activity before pump.fun regained the lead, as tracked by on-chain analysts such as this StepData write-up. Shares move week to week, so check a current dashboard rather than trusting any single figure.

LaunchLab supports several curve shapes, but its default is a constant-product curve on virtual reserves, the same family pump.fun uses. When we decoded live LetsBonk pools on-chain in August 2026, their parameters were almost identical to pump.fun's:

In practice, the market cap math in pump.fun market cap explained carries over almost unchanged: a LetsBonk coin starts near 28 SOL of market cap and graduates near 411 SOL, with the same price path in between. A chart that looks like a pump.fun chart at the same market cap is, mechanically, the same market.

The fee gap is real but small on the curve: 1% against 1.25% per side, so about half a point per round trip. It is bigger after graduation. A freshly graduated pump.fun coin still charges 1.25% on PumpSwap, while a LetsBonk coin in a Raydium CPMM pool on the 0.25% config charges a quarter of a percent.

For someone scalping a coin repeatedly in the first hour after graduation, that difference adds up.

Graduation on LaunchLab works on the same principle as on pump.fun: when the curve has raised its target, it stops trading and its SOL and remaining tokens seed the new pool. The graduation explainer covers the general mechanics, including why the new pool is thinner than the end of the curve.

• No liquidity pull on the curve. The curve's SOL is held by the program, not the creator.
• Fixed supply. The billion tokens are created up front.
• Supply concentration is the real risk. Creators and bundles of linked wallets can buy a large share cheaply in the first block and sell into later buyers. The bundled supply guide shows how to spot it.
• Most coins never graduate. On either platform, assume a random new coin will not reach 85 SOL.
• Terminals treat them the same way. Axiom, GMGN and other Solana terminals list both, so the choice of launchpad rarely changes your workflow.

So which is better to trade, bonk.fun or pump.fun?

On the curve the mechanics are nearly identical and the fee is slightly lower on bonk.fun. After graduation, LetsBonk coins in a 0.25% Raydium pool are cheaper to trade than pump.fun coins in their first PumpSwap tier.

What decides most trades, though, is the coin: who holds it and who is buying. The launchpad's logo is a weak signal either way; how not to get rugged covers the checks. For the full field, including Meteora-based launchpads, see Solana memecoin launchpads compared.

Fullport's token universe includes every Raydium LaunchLab platform, LetsBonk included, on the curve and after graduation to its Raydium pool. Each mint is verified on-chain against the LaunchLab program before it becomes tradeable, so the check does not rely on the bonk suffix (Rules §Token universe).

Curve trades are quoted from a fresh read of the LaunchLab pool state. Graduated coins are quoted with exact Raydium CPMM math on the pool's vault balances, net of fees accrued in the vaults, using the trade fee from the pool's own config (fill policy).

The account is simulated: $25,000, $50,000 or $125,000 for a one-time $120, $195 or $300, with trading losses coming out of the simulated balance, never your wallet. It has a +6% target and a single 4% floor that moves only at the UTC day close. Pass, and funded payouts send you 80% of profit in SOL. Trade from the browser terminal or with Fullport Tap on the terminal you already use.