Quick Summary
Sui and Aptos represent next-generation Proof-of-Stake blockchains built on the Move programming language. Sui uses object-based staking with 24-hour epochs, where staked SUI exists as an on-chain object yielding instant liquidity or epoch-boundary unstaking. Aptos distributes rewards rapidly across 2-hour epochs but enforces recurring 30-day validator lockup cycles for delegators.
Sui & Aptos (Move Ecosystem) Staking Guide
Both networks inherit Move's object-centric execution model, but they diverge sharply on epoch cadence, lockup design, and how rewards reach delegators. Here is a precise breakdown of every parameter that determines your staking experience on each chain.
1. SUI vs. APT Staking Parameters
Read across a row to see how the two Move-based networks differ on each parameter; read down a column for a full picture of either protocol's staking mechanics and liquidity profile.
| Parameter | Sui (SUI) | Aptos (APT) |
|---|---|---|
| Epoch Duration | 24 hours. Sui epochs run once per day. Rewards are calculated and distributed at each epoch boundary, meaning delegators receive their accrued rewards once every 24 hours. | 2 hours. Aptos epochs cycle every 2 hours, compounding rewards at a significantly higher frequency. A delegator's stake accumulates 12 reward events per day versus Sui's single daily event. |
| Staking Model | Object-centric. When you stake SUI, the protocol wraps your tokens into a StakedSui object on-chain. This object represents your stake position and can be held, transferred, or wrapped into a liquid staking derivative independently of the underlying tokens. | Account-based delegation. Delegators deposit APT into a validator's staking pool contract. The pool tracks each delegator's share proportionally. There is no stake object — your position is a numeric share in the pool contract. |
| Unbonding / Lockup Duration | Epoch-boundary withdrawal. You can request to unstake at any time, but the withdrawal processes at the next epoch boundary — up to 24 hours away. No extended multi-day unbonding window beyond that. | 30-day recurring lockup. Delegators are locked into 30-day cycles aligned to their chosen validator's lockup schedule. Early withdrawal requires waiting until the current cycle completes — no partial early exit. |
| Slashing Risk | Zero slashing on delegators. Sui does not slash delegator principal for any validator misbehavior. A poorly performing validator simply earns reduced rewards — your SUI balance is never at protocol risk. | Zero slashing on delegators. Aptos also does not slash delegator principal. Validators face governance-level consequences for persistent underperformance, but delegator stake is never reduced as a penalty. |
| Minimum Delegation Threshold | 1 SUI protocol minimum. In practice, gas costs make very small delegations uneconomical, but no meaningful capital barrier exists to prevent retail participation. | 10 APT minimum per delegation. The protocol enforces a hard floor to keep pool accounting efficient. Below this threshold a delegation transaction will be rejected at the contract level. |
2. Network Mechanics in Detail
The comparison shows the differences. These cards explain the architectural decisions that produce them — and what each design choice means in practice for your capital.
Sui Network Mechanics
Object staking, 24-hour epochs, storage fund
Sui's object-centric execution model treats staked tokens as first-class on-chain objects rather than entries in a pool contract. When you delegate SUI, the protocol mints a StakedSui object into your wallet. This object accrues rewards at each 24-hour epoch boundary and can be transferred, split, or wrapped into liquid staking protocols like Aftermath Finance or Volo without triggering an unstake. Sui's storage fund — funded by storage fees — provides an additional reward source beyond pure inflation, meaning stakers benefit from network activity as well as token issuance.
Key mechanics:
- +Object-centric stake — StakedSui object is transferable and composable
- +24-hour epoch transitions — clean daily reward settlement cycle
- +Storage fund rewards — stakers share in on-chain storage fee revenue
- +SIP-6 liquid staking wrappers — stake stays productive without lockup risk
- ·Withdrawal processes at next epoch boundary — up to 24h delay
Storage fund advantage: Unlike pure inflation-based staking, Sui's storage fund collects fees from on-chain object storage and redistributes them to validators and stakers. As Sui network activity grows, this fee revenue supplements staking yield independently of token issuance rates.
Aptos Protocol Mechanics
2-hour epochs, 30-day lockup cycles, non-custodial delegation
Aptos compounds rewards every 2 hours — 12 times per day — giving delegators the highest reward frequency of any major PoS network. Each validator runs a staking pool contract, and delegators deposit APT directly into that contract. The pool tracks each delegator's proportional share and applies rewards at every epoch boundary. The tradeoff is Aptos's 30-day recurring lockup: once you delegate, your APT is locked until the validator's current 30-day lockup cycle completes. There is no partial early exit — you wait for the cycle boundary.
Key mechanics:
- +2-hour epoch compounding — 12 reward events per day, maximizing APY
- +Non-custodial delegation — your APT stays in the pool contract, not the validator's wallet
- +Zero delegator slashing — validator misbehavior does not reduce delegator principal
- −30-day lockup cycles — capital illiquid until the current cycle concludes
- −10 APT minimum delegation threshold enforced at the contract level
Lockup cycle timing: If you delegate on day 1 of a validator's 30-day cycle, you wait the full 30 days. If you delegate on day 29, you wait just one day to complete that cycle — then re-enter a new 30-day window. Checking where a validator is in their cycle before delegating can meaningfully shorten your first lockup.
Project Returns on SUI and APT
Sui's daily epoch compounding and Aptos's 2-hour reward cycles produce meaningfully different compound growth curves over a 12-month horizon. Use the calculator to model your SUI and APT holdings side by side — enter your principal to see what each network's current APY translates to in actual token returns.