Stripe-owned Privy and Jito co-develop Solana transaction inclusion tool FullSend

Stripe subsidiary Privy has partnered with Solana infrastructure firm Jito Labs on a new transaction certainty tool called FullSend, which will help ensure that transactions sent from Privy wallets are included in Solana blocks "as fast as the network allows," according to an announcement shared with The Block.

FullSend was co-developed by Privy and Jito, one of the most prominent Solana infrastructure firms, and has reportedly been running unannounced in production inside Privy since the beginning of the year. Since January, FullSend has achieved 99.999% landing reliability across millions of transactions.

"Transaction landing on Solana became more complicated than it ever needed to be — tips, priority fees, picking the right endpoint. We wanted to make that entire decision disappear for developers,” Privy CTO Asta Li said in the statement.

FullSend works by automatically routing every transaction signed in a Privy wallet directly to the current and upcoming Solana leaders through Jito’s low-latency network. Solana rotates block building leaders roughly every 400 milliseconds per slot, following a predetermined schedule based on stake.

In addition to helping ensure inclusion, the system also bypasses any Maximal Extractable Value (MEV) risks, like bots front-running, sandwiching, or censoring transactions.

According to the announcement, FullSend cuts Privy’s inclusion latency for transactions to 50 milliseconds, “putting transactions in front of leaders before the competition.” Traditionally, Solana wallets send transaction information to a public or hosted RPC node, which then broadcasts it to the network — a process that takes at least 200 ms.

"The best applications on Solana win or lose on how fast and reliably their transactions land — that's the whole game,” Jito Labs CEO Lucas Bruder said. “FullSend is our answer at the infrastructure layer: straight to the leader, standard priority fees, MEV protection by default.”

The announcement notes the solution is especially geared toward fintechs, market makers, and other institutional Solana users who need speed and certainty when transacting on a blockchain.

Earlier this year, Privy partnered with Alchemy on an institutional onboarding solution. Privy counts fintechs like Klarna, Ramp, and Deel as users, as well as Hyperliquid, and claims 140 million accounts that process billions of dollars in monthly volume.

Stripe, which is also co-developing the stablecoin-focused Layer 1 blockchain Tempo, acquired Privy in 2025 following its $1.1 billion acquisition of Bridge.