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"Jito" on Solana refers to three independent components that stakers routinely conflate: the Jito client (a validator software fork), the Jito Block Engine (an off-chain MEV auction service), and the Jito Stake Pool (an on-chain stake distribution program that issues the jitoSOL liquid staking token). The three are operated under the Jito brand but are separate systems with separate roles; a sentence about "Jito" without qualifying which component is meant is almost always ambiguous and frequently wrong.

This entry is a short navigation page. The detailed mechanics — tip distribution, MEV commission, bundle auction flow — live in the Jito MEV entry.

Jito client (Jito-Solana)

The Jito client, also called Jito-Solana, is a validator software fork derived from Agave with MEV-aware block-building hooks. A validator running this client is "MEV-enabled" — it can receive priority bundles from the Block Engine and include them in produced blocks during its leader slots. The client is software the operator runs on its node, not a service, an account, or a stake program.

Approximately 85-90% of staked SOL runs the Jito client as of epoch 971 (per BlockEden's March 2026 client adoption report). The share has declined from a peak above 90% as Frankendancer adoption has grown; the two clients are not currently interoperable.

Jito Block Engine

The Jito Block Engine is the off-chain MEV auction service operated by Jito Labs. Searchers submit priority transaction bundles to the Block Engine along with a tip payment; the Block Engine auctions bundles and forwards the winning ones to the current leader validator running the Jito client. Tip payments flow from searchers through the Block Engine to validators, which distribute them to stakers net of Jito MEV commission.

This is the service that produces the "Jito MEV rewards" cited alongside staking APY on Stakewiz. A validator must both run the Jito client and be configured against the Block Engine to participate — neither alone is sufficient. A validator can also opt out of MEV by disabling the Block Engine connection.

Jito Stake Pool

The Jito Stake Pool is the Jito Foundation's on-chain stake distribution program — a stake pool in the same structural category as Marinade and SolBlaze. It issues jitoSOL, the liquid staking token representing a tokenized claim on pooled SOL distributed across the pool's selected validator set. Selection prioritizes validators that run the Jito client and participate in the Block Engine, so jitoSOL is the LST most directly exposed to MEV revenue.

The three components are independent. A validator can be in the Jito Stake Pool without running the Jito client (uncommon, but structurally possible). A validator can run the Jito client without ever receiving Jito Stake Pool delegation. The Block Engine serves all Jito-client validators, not only pool-included ones.

Naming traps

  • "Jito" alone is ambiguous and forbidden by the styleguide. Specify Jito client (software), Jito Block Engine (auction service), or Jito Stake Pool (stake program).
  • "jitoSOL" is the LST issued by the Jito Stake Pool — it is not a Block Engine product. Holding jitoSOL exposes the staker to the pool's validator selection, not directly to every Jito-client validator's Block Engine MEV income.
  • "Running Jito" in operator parlance usually means running the Jito client (the software). Confirm which component a source intends before drawing economic conclusions.

Sources

Jito component shares cited reference Stakewiz and BlockEden cluster data at epoch 971, 2026-05-15. Client adoption shifts each epoch; verify on a fresh snapshot before citing for current decisions.