PrediX vs alternatives

How PrediX compares to other prediction market protocols from a developer perspective.

Architecture comparison

Feature	PrediX	Polymarket	Limitless	Kalshi
Chain	Unichain L2	Polygon	Base	Off-chain (centralized)
Outcome tokens	ERC-20 (composable)	ERC-1155 (limited)	ERC-1155 (CTF)	No tokens (centralized ledger)
Liquidity	Hybrid CLOB + AMM (Uniswap v4)	CLOB only	CLOB (CTF Exchange)	CLOB (centralized)
Execution	On-chain Router (atomic CLOB+AMM)	Off-chain matching + on-chain settlement	On-chain CLOB	Fully centralized
Oracle	Pluggable (Manual, Chainlink, UMA)	UMA	UMA	Internal
Gas on failed tx	Zero (Unichain)	Paid	Paid	N/A
Account abstraction	Passkey + smart account (ERC-4337)	Magic Link	EOA only	Email/password
Gas sponsorship	Paymaster for eligible users	None	None	N/A

Trading API comparison

	PrediX	Polymarket	Limitless
Trade entry	Router contract (`buyYes/sellYes`)	CLOB API (EIP-712 signed orders)	CLOB API (EIP-712 signed orders)
Order signing	Wallet signs tx (standard)	EIP-712 typed data (off-chain signing)	EIP-712 typed data (off-chain signing)
Limit orders	Exchange contract (`placeOrder`)	API submission	API submission
Quote	On-chain `quoteBuyYes()` (eth_call)	REST API	REST API
REST API	Indexer (raw data) + Backend (enriched)	REST API	REST API
WebSocket	Topic-based subscribe (orderbook, trades, user)	WebSocket streaming	WebSocket streaming
SDKs	TypeScript + Python (TBA)	Python + TypeScript	TypeScript + Python + Go + Rust

Key differentiators for developers

Hybrid execution

_{Router hybrid execution: User -> Smart Router (stateless) -> splits to CLOB (priority, 99-tick order book) + AMM (fallback, Uniswap v4 Hook, dynamic fees) -> combined YES/NO tokens out. Single atomic tx.}

PrediX Router aggregates liquidity from both CLOB (on-chain order book) and AMM (Uniswap v4 pool) in a single atomic transaction. Other protocols typically use one or the other.

User -> Router.buyYes()
         ├── CLOB: try fill limit orders (best price first)
         └── AMM: swap remainder via Uniswap v4 Hook
         -> Combined output in 1 tx

ERC-20 composability

Outcome tokens are standard ERC-20 - they can be used as collateral, added to lending pools, or composed with other DeFi protocols. Most other platforms use ERC-1155 which has limited DeFi integration.

On-chain CLOB

PrediX Exchange runs fully on-chain with 99 price ticks ($0.01-$0.99). Three matching types: complementary (BUY<->SELL), mint synthetic (both BUY >= $1), merge synthetic (both SELL <= $1).

LP protection

Uniswap v4 Hook dynamically adjusts AMM fees as markets approach expiry, protecting liquidity providers from informed trading (toxic flow).

Zero gas on reverts

Unichain does not charge gas for failed transactions - developers and users never lose ETH on reverted trades.

Migration notes

From Polymarket

Polymarket concept	PrediX equivalent
CTF Exchange contract	PrediX Exchange (`placeOrder`, `cancelOrder`)
CLOB API order	Exchange `placeOrder(marketId, side, price, amount, builder)`
EIP-712 signed order	Standard wallet tx signing (no off-chain signature needed for Router)
`positionIds[0]` = YES	`marketId` + `Side.BUY_YES (0)`
UMA oracle	ManualOracle (Phase 1) + Chainlink + UMA (Phase 2)

From Limitless

Limitless concept	PrediX equivalent
Venue contract	Router contract (single entry point)
EIP-712 order signing	Standard tx via Router (`buyYes/sellYes`)
API key (`lmts_`)	SIWE session token
Sub-accounts	Smart account (ERC-4337)
`GET /markets/:slug`	`GET /api/markets/:idOrSlug`