What it does
Extended combines offchain order handling with onchain settlement and risk validation. The goal is a familiar exchange workflow while balances and trade transitions remain tied to a public settlement system. It originally operated under the X10 name and later migrated from StarkEx infrastructure to Starknet.
Its current unified-margin guide covers more than a stablecoin-only account. Eligible assets contribute collateral value after asset-specific adjustments, while profit and loss are accounted for in USDC. This makes it possible to maintain other holdings alongside perpetual positions, but a negative USDC balance can create borrowing costs even when the total account still has positive collateral value.
Which network does Extended use?
Extended’s documented settlement deployment is Starknet following its August 2025 migration. The team announced a future migration to Arc on 18 September 2026; Arc deposits and withdrawals are already supported, but the announcement leaves the settlement-migration timeline for a separate update. A funding route is not evidence that the migration has completed.
Where it stands out
- Starknet settlement and published architecture give users a concrete way to examine how trade and account checks are enforced.
- The standard maker fee is zero, with additional rebates for qualifying liquidity provision; the account’s actual tier still matters.
- Unified collateral can improve flexibility for traders who hold assets such as ETH or bitcoin and want to manage their margin centrally.
What you can do
- 01USDC is the settlement unit. The collateral guide also lists XVS, wrapped bitcoin, ETH and USDT with different equity factors.
- 02Negative USDC balances can incur interest against non-stable collateral; XVS treatment is documented separately and should not be generalized to every asset.
- 03REST and WebSocket APIs support execution and monitoring, while subaccounts help separate strategies within the supported account limits.
- 04The points programme distributes variable rewards for eligible activity. Its weekly cap is not a promise of a fixed allocation or future token conversion.
Who’s behind it
Extended’s official team page identifies a former Revolut leadership and engineering group. The CEO, known publicly as rf_extended, previously led Revolut crypto operations and worked at McKinsey. The CTO’s background includes building exchange systems, while the business team includes experience with Revolut crypto and Corda.
Supporting sources 1
Funding and investors
X10 disclosed $6.5M of funding at its April 2024 testnet launch, according to a company statement reported by The Block. Extended’s own July 2026 announcement confirms a further $12.5M strategic round led by eToro, with Àlber Blanc and Jump Crypto. The associated Zengo collaboration is a commercial partnership, not a separate financing round.
Supporting sources 2
- 2024-04-30$6.5M
Early funding disclosed at X10 launch
Reported investorsTioga Capital · Semantic Ventures · Cherry Ventures · StarkWare · Cyber Fund · Konstantin Lomashuk
The Block reports the amount and investor list from a company statement at the X10 testnet launch, also naming unspecified Revolut executives as angel investors. This is the public disclosure date; a closing date and formal round stage were not supplied. The original company statement was not independently retrieved.
Supporting sources 1
- 2026-07-02$12.5M
Strategic
Reported investorseToro · Àlber Blanc · Jump Crypto
The amount and participants are stated in the graphic attached to Extended’s official announcement. The Zengo partnership is described separately.
Supporting sources 1
Referral benefits and conditions
The official programme gives referred users a 10% trading-fee discount on their first $50M of cumulative trading volume. No fixed registration payment is documented.
A referral must be attached under the programme rules. Referrer points and affiliate arrangements are separate benefits. Elevated API-limit account classifications are excluded from referral incentives; check the current account’s eligibility.
Supporting sources 2
Fees & availability
Fees and costs
The standard schedule lists 0% maker and 0.025% taker fees, with a current 0.010% RWA taker rate. Eligible maker activity can earn rebates up to 0.010%, subject to volume-share tiers and payout conditions. Funding, spreads and any collateral borrowing cost should be included in the total cost of holding a position.
Supporting sources 2
Eligibility and availability
The restricted-country list includes the US, UK, Canada, Russia and Hong Kong, among others. Higher API-limit account classifications can have different incentive eligibility. Collateral haircuts, USDC borrowing and liquidation rules matter even if trading fees are low.