Across Protocol vs Portal

Across Protocol4.3/5

VS

Portal3.4/5

Feature	Across ProtocolVisit	PortalVisit
Ratings
Our score	4.3/5	3.4/5
User rating	No reviews yet	No reviews yet
Security	4.0	4.0
Speed	5.0	3.0
Fees	4.5	3.5
Chain coverage	4.0	3.0
Ease of use	4.5	3.0
Specs
KYC required	No	No
Design	Intent-based	Not disclosed
Chains	Ethereum, Arbitrum, Base, Optimism, Polygon, Other	Bitcoin
Chains supported	27	Not disclosed
Typical fee	Network gas and relayer fee with zero aggregator markup	Not disclosed
Typical transfer time	1.2 seconds	Not disclosed
Security model	UMA optimistic oracle	BitScaler trustless multi-party atomic swap channels and non-custodial validator nodes
Audited	Yes	Not disclosed
Token	ACX	PTB
Intent-based	Yes	Not disclosed
Native token transfers (no wrapped tokens)	Yes	Yes
Max transfer	$50,000,000	Not disclosed
Company
Founded	2021	2018
Headquarters	—	United States
Investors	Paradigm, Bain Capital Crypto, Coinbase Ventures, Multicoin Capital +3	Paloma Investments, Arrington Capital
Strengths and weaknesses
Pros	Average transfer speed of 1.2 seconds across supported chains Over $40B in cumulative volume processed without loss of user deposits Transfers use native assets without relying on wrapped tokens No identity verification (KYC) required to bridge	No wrapped tokens or lock-and-mint bridge contracts Non-custodial design leaves funds in user wallets until atomic settlement Native support for Bitcoin, Runes, and Ordinals without synthetic minting $92M in verified venture backing from Coinbase Ventures, OKX Ventures, and Paloma Investments
Cons	July 2026 Solana relayer exploit resulted in $3.35M in stolen relayer funds Relies on third-party relayers maintaining destination chain liquidity Off-chain relayer bugs can temporarily pause specific chain routes ACX governance token undergoing sunsetting and corporate restructuring	Swap execution speeds are tied to Bitcoin base-layer confirmation times Channel settlement remains vulnerable to elevated Bitcoin network fee spikes
Best for	Fast cross-chain Layer 2 bridging, DeFi traders avoiding wrapped assets, Large stablecoin institutional transfers	Native Bitcoin holders avoiding wrapped tokens, Traders exchanging Ordinals and Runes cross-chain, Developers integrating direct Bitcoin settlement

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