Synapse vs Arbitrum Bridge Arbitrum Bridge leads by 4 points.
Arbitrum Bridge scores 4 points above Synapse, led by trust and route clarity. Synapse ranks #11 and Arbitrum Bridge #8 of 18 published bridges. Every term of the gap is on the ledger below; the inputs are on the audit receipt.
Synapse51
vs
ARArbitrum Bridge55
Scores are out of 100; published scores fall within 41–99 · ranks #11 and #8 of 18
Criteria roundingThe criteria block is rounded to whole points before it is spread−0.2
Reproduced gap+3.6
Published gapAfter score rounding and bounds — see the note below5551+4.0
Weight is in points of the 86-point weighted total. Points are score points of the gap between the two.
EvidenceEvidence evidence high vs evidence medium — how well each score is supported, not the score itself
Arbitrum Bridge's lead rests on lighter criteria: Synapse is ahead on route coverage, which carries more weight (28) than any criterion Arbitrum Bridge leads on (26).
Arbitrum BridgeScore 55Native canonical bridge for Ethereum ↔ Arbitrum movementStrength: Trust — 10/10Watch-out: 7-day challenge delay on direct withdrawals (use third-party bridges for fast exits)SynapseScore 51EVM-focused multichain bridge, with Solana reached through a separate bridgeStrength: Speed — 7/10Watch-out: Synapse's quote API answered "No bridge routes found" for USDC and ETH between Ethereum, Arbitrum, Optimism and Base on 2026-09-30, and again for ETH from Ethereum to Arbitrum and from Arbitrum to Optimism on 2026-10-23, when its /bridge/v2 endpoint returned HTTP 500. The bridge still settles transfers: its Ethereum contract (0x2796317b0fF8538F253012862c06787Adfb8cEb6) logged 50 TokenWithdraw and TokenMint events between 11 and 22 October 2026, the latest at 20:04 UTC on 22 October. Get a quote in its app before you rely on a route
Quick facts
At a glance
FactSynapseArbitrum Bridge
PricingSnapshotNo Synapse price could be read on 30 September 2026. The Synapse REST API (api.synapseprotocol.com), which its docs page docs.synapseprotocol.com/docs/Bridge/REST-API describes as the way to "retrieve quotes", returned "No bridge routes found" for USDC Ethereum to Arbitrum, Ethereum to Optimism and Arbitrum to Base and for ETH Ethereum to Arbitrum and Arbitrum to Optimism, and its /bridge/v2 endpoint returned "An unexpected error occurred in /bridge/v2. Please try again later." The Synapse docs pages read (Bridge, REST API, Supported Routes, Synapse Intent Network, contract pages) publish no fee rate, so the percentage the previous note carried is not repeated.Arbitrum docs, "Quickstart: Arbitrum bridge" (docs.arbitrum.io/arbitrum-bridge/quickstart.md, fetched 30 September 2026): no bridge fee is stated on that page; the user pays gas - "You’ll need the native currency of the parent chain to bridge your assets to the destination chain." A withdrawal needs a second, parent-chain transaction after the challenge period: "Upon confirmation (about one week later), you can execute them" (docs.arbitrum.io cross-chain messaging page). No dollar cost is published on either page, so the deposit and withdrawal dollar ranges the previous note carried are not repeated.
Asset coverageEditorialToken transfers through Synapse's legacy nUSD/nETH pools and its RFQ relayer network, where a route can be quotedETH and any ERC-20 with a registered token bridge contract
Region fitSnapshotus, europe, globalglobal
From the published criteria
Which should you pick?
Synapse
51#11 of 18
Pick it when
Pick Synapse if route coverage matters most — it scores 6/10 to Arbitrum Bridge's 2/10 there (weight 28).
Strength
Speed — 7/10
Tradeoff
Synapse's quote API answered "No bridge routes found" for USDC and ETH between Ethereum, Arbitrum, Optimism and Base on 2026-09-30, and again for ETH from Ethereum to Arbitrum and from Arbitrum to Optimism on 2026-10-23, when its /bridge/v2 endpoint returned HTTP 500. The bridge still settles transfers: its Ethereum contract (0x2796317b0fF8538F253012862c06787Adfb8cEb6) logged 50 TokenWithdraw and TokenMint events between 11 and 22 October 2026, the latest at 20:04 UTC on 22 October. Get a quote in its app before you rely on a route
AR
Arbitrum Bridge
55#8 of 18
Leads
Pick it when
Pick Arbitrum Bridge if trust matters most — it scores 10/10 to Synapse's 4/10 there (weight 26).
Strength
Trust — 10/10
Tradeoff
7-day challenge delay on direct withdrawals (use third-party bridges for fast exits)
Self-identify in 10 seconds
Which one is actually for you?
Synapse
Choose Synapse if route coverage matters most
Route coverage: 6/10 against 2/10 for Arbitrum Bridge (weight 28)
Transfer speed: 7/10 against 2/10 for Arbitrum Bridge (weight 22)
SynapseScore 51EVM-focused multichain bridge, with Solana reached through a separate bridgeStrength: Speed — 7/10Watch-out: Synapse's quote API answered "No bridge routes found" for USDC and ETH between Ethereum, Arbitrum, Optimism and Base on 2026-09-30, and again for ETH from Ethereum to Arbitrum and from Arbitrum to Optimism on 2026-10-23, when its /bridge/v2 endpoint returned HTTP 500. The bridge still settles transfers: its Ethereum contract (0x2796317b0fF8538F253012862c06787Adfb8cEb6) logged 50 TokenWithdraw and TokenMint events between 11 and 22 October 2026, the latest at 20:04 UTC on 22 October. Get a quote in its app before you rely on a route
ARArbitrum BridgeLeads
Choose Arbitrum Bridge if trust matters most
Trust: 10/10 against 4/10 for Synapse (weight 26)
Route clarity: 9/10 against 3/10 for Synapse (weight 24)
Arbitrum BridgeScore 55Native canonical bridge for Ethereum ↔ Arbitrum movementStrength: Trust — 10/10Watch-out: 7-day challenge delay on direct withdrawals (use third-party bridges for fast exits)
Criterion by criterion
Scorecard
Published criteria · weight in points of 868 of 8 cells scored. Strength is read from the evidence file; the weight is the published one. Methodology
Route coverage
by 4 of 10weight 6.7 of 86Synapse leads
Synapse6/10 out of 10
Arbitrum Bridge2/10 out of 10
Route clarity
by 6 of 10weight 5.8 of 86Arbitrum Bridge leads
Synapse3/10 out of 10
Arbitrum Bridge9/10 out of 10
Transfer speed
by 5 of 10weight 5.3 of 86Synapse leads
Synapse7/10 out of 10
Arbitrum Bridge2/10 out of 10
Trust
by 6 of 10weight 6.2 of 86Arbitrum Bridge leads
Synapse4/10 out of 10
Arbitrum Bridge10/10 out of 10
Score dimensions
weights sum to 86
The published score is five dimensions, each weighted for the category. "Published criteria" is the criteria block above; the other four are the engine's own terms — availability, friction, trust record, measured data. Each bar is one side's points out of that dimension's maximum; the weight beside the name is its points of the 86-point weighted total. The published criteria above can fill 24 of the block’s 30. A weight marked “constant here” belongs to a dimension every ranked product in the category holds at the same value: it still counts in the total, and it orders nothing here.
Availabilityweight 20 of 86
Synapse20/20Arbitrum Bridge14/20
Synapse leads
Published criteriaweight 30 of 86
Synapse12/30Arbitrum Bridge13.8/30
Arbitrum Bridge leads
Frictionweight 10 of 86 · constant here
Synapse2.7/10Arbitrum Bridge2.7/10
Tie
Trust recordweight 8 of 86
Synapse3.2/8Arbitrum Bridge3.2/8
Tie
Measured dataweight 18 of 86
Synapse6.9/18Arbitrum Bridge12.5/18
Arbitrum Bridge leads
Decision rulePublished order
Choose Arbitrum Bridge unless the term Synapse leads on is the one you are buying.
Pick Synapse if route coverage matters most — it scores 6/10 to Arbitrum Bridge's 2/10 there (weight 28).
The published order weighs every criterion the same way for everyone. To weigh them your way, run .
From the published order
Next best action
If this isn't your case
Other matchups worth comparing
How you can lose money here, and what the ranking scores
Verification failure: an invalid state or transfer is accepted.
Not assessed by this ranking: Contract failure, Control failure, Liveness failure, Custody failure, Regulatory failure, Execution failure, Exit failure. A high place says nothing about these; the Methodology tab says what each means.
Also scored, as cost, quality or a summary of several families: Route coverage (28%), Route clarity (24%), Execution speed (22%).
Questions
Frequently asked questions
Arbitrum Bridge scores 4 points above Synapse, led by trust and route clarity. Published scores, out of 100: Synapse 51 (rank 11 of 18 bridges), Arbitrum Bridge 55 (rank 8 of 18).
Reviewed means both products compared here was read against its sources on or after that date; every ranked category is re-read at least every 45 days. Models research, extract and parse. A deterministic engine ranks. Every quote passes an adversarial refute pass.
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