RiskMemecoins are highly speculative, and most lose nearly all their value. Nothing here is financial advice. The risks in full
What is a Solana bundler?
A Solana bundler is a tool that creates a coin and buys it from several of your own wallets in the same block, before anyone else can trade. It's also called a memecoin bundler or, for coins on pump.fun, a pump.fun bundler.
- A bundle is a group of transactions sent to land together, in order: all of them or none. It's often called a Jito bundle, after the relay most tools send it through.
- The coin's creation goes first, then your wallets' buys.
- Nobody can get a buy in between them, because the coin doesn't exist until the bundle lands.
A bundle isn't private. Every buy is on the chain, and bundle checkers flag coins where several wallets bought in the first block.
How a bundle launch works
You make the wallets, fund them, say how much each one buys, and approve once. The bundler builds the coin's creation and every buy, and sends them together.
- Make or import the wallets that will buy, and save a backup of their keys.
- Send each wallet enough SOL for its buy and its fees.
- Fill in the coin: name, ticker, description and image.
- Set how much each wallet buys, and the tip the bundle pays to land.
- Review the costs and approve. The bundle lands whole, or not at all.
On memetools these steps are in the Advanced layout. pump.fun bundle launches walks through them.
How many wallets can buy in the first block?
It depends on the tool. A bundle holds only a few transactions (five, with Jito) and each transaction carries a few buys, so every bundler caps the first block. On memetools up to 12 wallets buy in the coin's block, and up to 20 buy in all.
| Mode on memetools | Who buys | How it lands |
|---|---|---|
| Normal | The launch wallet only | One transaction, with the coin |
| Block 0 | Up to 12 bundle wallets | One bundle in the coin's block: all or none |
| Dragon | Up to 3 in the coin's block, up to 20 in all | A small bundle, then the rest the moment the coin is live |
When a tool advertises more wallets than fit in one bundle, the extra ones buy just after the first block, at whatever the price is by then. Ask how many are inside the bundle itself.
Can a bundle fail?
Yes. A bundle that doesn't land does nothing: the coin isn't created and no buy is made, so nothing is spent on buys. That's the point of sending them together.
- A wallet that's short of SOL can stop the whole bundle. memetools names any short wallet in the review, before anything is sent.
- A bundle that was sent hasn't necessarily landed. Check that the coin exists on the chain.
- Buys sent after the first block are ordinary transactions. One can miss, or land at a worse price, if the price has moved.
Bundler, sniper or volume bot?
A bundler buys your own coin as it launches. A sniper buys someone else's coin the moment it appears. A volume bot trades a coin back and forth to make it look busy.
- Bundling uses your wallets on your coin, inside your own bundle. Everyone can see it.
- Sniping is a race to buy other people's launches first. Bundling your own launch is how a launcher gets in ahead of snipers.
- Volume bots make trades that aren't real demand. That's wash trading, it misleads buyers, and this guide doesn't cover it.
What a Solana bundler costs
A bundled launch pays four things: the launchpad's fees, Solana's deposits, a tip for the bundle to land, and the bundler's own fee. Only the last one differs from tool to tool.
On memetools, on pump.fun
Bundlers price in different ways: a flat fee per launch, a fee per wallet, a share of each buy or sale, or a monthly plan. Solana bundlers compared lists what seven tools charge, and pump.fun fees has every launchpad fee. The bundle cost calculator adds up a launch of your own.
Who holds the keys?
It depends on the bundler. A bundle wallet's private key can sit in your browser, on your computer or on the tool's server, and whoever holds a key can spend what's in that wallet.
- In your browser. memetools creates or imports bundle wallets in your browser and keeps them encrypted there. The keys are never sent to us.
- On your computer. A desktop app or a script keeps keys in a file on your machine.
- On the tool's server. Many bots and some web tools make the wallets for you and keep the keys. Check that you can export them.
Wherever the keys are, save a backup, and don't leave more in a bundle wallet than the launch needs.
Can people tell a coin was bundled?
Yes. The buys sit in the coin's first block, and wallets funded from one wallet are linked to it on the chain.
- Bundle checkers and trading terminals show how much of a coin was bought in its first block, and mark those wallets.
- Buyers read this. Many avoid coins where a large share is held by the launcher's wallets, since those wallets can sell at any time.
Treat your bundle wallets as yours in everything you say about the coin. Passing your own buys off as outside demand misleads buyers.
Risks
A bundle multiplies what you put into a coin that may go to zero. memetools gives no advice on whether to launch or buy one.
- Memecoins are highly speculative, and most lose nearly all their value.
- A private key given to a tool you can't check can be used to empty the wallet.
- Each bundle wallet is a real wallet with its own key. Keep the backup file and its password: nobody can restore them for you.
- Rules on token launches differ by country. Following them is up to you.