sour.finance
Launch app →
v1.0·live on mainnet

Sour is the perp DEX that bites back.

×No funding cron.×No liq bots.MEV-immune by design.
Launch app →Read the docs

Mainnet — real USDC, soft-launch capacity. Trade only what you can afford to lose.

LIVE THROUGHPUT
2,840tps
illustrative — not live network telemetry
VS. THE FIELD
cex avg1.1k
evm perps180
sour2,840
EVERY OTHER PERP DEX · MEMPOOL
↑ bot front-run · BUY 250 SOL @ $142.86+0 ms
📦 you · BUY 250 SOL @ $142.86+12 ms
↓ bot back-run · SELL 250 SOL @ $143.14+24 ms
you paid the slippage. someone else bought lunch.
−$70
SOUR · BATCH CLEARING
247 ORDERS · ALL EQUAL · ONE PRICE
📦 you · BUY 250 SOL @ $142.86uniform
+ 246 other orders · same exact price · same exact block
▲ no front-run lane · no back-run lane · no priority gas
you paid the price you saw. that's the whole feature.
$0
SOL142.86 2.34%BTC67,840.20 1.12%ETH3,450.18 0.42%BNB612.40 0.88%XRP2.41 1.20%JUP0.84 4.10%WIF2.18 3.40%BONK0.00003 6.80%PYTH0.42 0.62%SOL142.86 2.34%BTC67,840.20 1.12%ETH3,450.18 0.42%BNB612.40 0.88%XRP2.41 1.20%JUP0.84 4.10%WIF2.18 3.40%BONK0.00003 6.80%PYTH0.42 0.62%
ONE APP · TWO MODES

Trade like a quant. Or like you're 5.

Same engine. Same prices. Same fees. The UI shape-shifts to whoever you are today.

📊
MODE 01

Trader Mode.

Bloomberg-grade depth: positions, fills, funding tabs, draggable demand bands, ladder orders, hotkeys. For the people who've been wrist-deep in a candlestick chart since 2017.

  • Drag-to-set demand bands on the chart
  • Cross-margin & per-position margin
  • Hotkeys: B/S, ESC to flatten, +/− leverage
  • Funding rate, OI, basis, all visible
  • API + WebSocket feed for bots
🎲
MODE 02

Degen Mode.

One card per market. Tap up or tap down. Pick a dollar amount with a slider. No "notional," no "liquidation price," no jargon. You can't lose more than you put in. Promise.

  • Tinder-style card per market
  • Risk shown in 🌶 — not "leverage"
  • Win/lose preview in plain dollars
  • Hard-capped: can never lose more than your bet
  • Streak counter for the brave
THE SOUR PHILOSOPHY

Honest markets. Real teeth.

Every other DEX rolled out funding crons, predatory liq bots, MEV sandwich bots, and called it a feature. We took a different bite.

01

No funding cron, ever.

Funding is computed atomically inside each batch settlement. There is no off-chain keeper. There is nothing to bribe. There is nothing to break.

02

Liquidations are public and capped.

Anyone can run a liq bot. Margin is recovered at oracle mid, not at the most predatory price the bot can get away with. Insurance fund covers the gap.

03

MEV-immune by design.

Orders enter a 1.8-second batch. Inside the batch they're sorted by price-time priority and cleared at a single uniform price. There is no front-run. There is no sandwich.

04

Two UIs, one matching engine.

Trader Mode and Degen Mode talk to the same orderbook. A Degen Mode tap is a real perp position, not a synthetic. Same fills, same fees, same liq math.

05

Fees that don't hide.

3 bps per fill. No taker premium. No depositor fee. No withdrawal fee. The number on the order ticket is the number that hits your wallet.

HOW IT WORKS

Three steps. One bite.

1
🔌

Connect your wallet.

Phantom, Backpack, Solflare, Ledger. No KYC, no email, no waiting. Two clicks.

2
🎯

Pick a side.

Trader Mode: place a market or limit order. Degen Mode: tap up or down. Either way, your order joins the next 1.8-second batch.

3
🍋

Settle and stack.

Batch clears at a uniform price. Your fill, fees, and PnL update in the same block. Withdraw anytime.

$840M
30-day volume
47,210
unique wallets
3 bps
flat trade fee
~1s
clears
FREQUENTLY ASKED

Questions, answered.

Is Degen Mode a different product?+

Same orderbook, same fills, same fees. Degen Mode is just a UI on top. Anything you can do in Degen Mode you can do in Trader Mode and vice versa.

Can I really not lose more than I bet?+

In Degen Mode, yes — your bet sets your max loss, full stop. Under the hood we open a position with a built-in stop at the bet amount. In Trader Mode, you can choose to skip the stop and your downside is governed by your margin and the liq engine like any perp.

How is funding calculated?+

Each 1.8-second batch computes an oracle-anchored funding payment between longs and shorts. There is no separate cron, no off-chain keeper. The math is in the spec.

What happens at batch close?+

Orders are sorted by price-time priority, matched at a single uniform clearing price, and settled atomically. Funding, liqs, and fee accruals run in the same block.

Where does liquidity come from?+

A combination of resting orderbook liquidity, the SOUR LP vault (passive), and active market makers running on our API.

Is there a token?+

Not yet. There is no presale. Anyone DMing you about a presale is not us.

Pucker up.

One app, two modes, zero bullshit. Mainnet, live now. The market doesn't care how you read it — bring whichever face you have today.