A new chain category crystallized in 2025–26: the stablecoin Layer-1, where the gas token is a dollar and the design center is payments rather than speculation. At least four serious entrants now claim it — Arc, Plasma, Stable, and Tempo — each backed by a different giant of the money stack. This page is the category's map: what defines a stablecoin chain, how the four differ, and how to think about which rails win.
What makes a chain a "stablecoin chain"?
Three properties, in descending order of importance. Fees denominated in a stablecoin — users pay gas in dollars, removing the volatile-gas-asset problem that makes ordinary chains awkward for payments. A design center of money movement — settlement speed, payment finality, FX, and compliance features prioritized over general-purpose computation. And issuer or processor alignment — each serious entrant is backed by a company whose core business is the dollar itself. General-purpose chains host stablecoins; stablecoin chains are built around them. The category exists because the biggest players in stablecoins concluded that renting blockspace on other people's chains was the wrong long-term position.
How do the four compare?
| Arc | Plasma | Stable | Tempo | |
|---|---|---|---|---|
| Backer | Circle (USDC issuer) | Tether-ecosystem aligned | Tether/USDT-aligned | Stripe & Paradigm-associated [VERIFY: current backer framing] |
| Gas asset | USDC (native, 18 decimals) | USDT-centric [VERIFY: exact gas mechanics] | USDT [VERIFY: exact gas mechanics] | Stablecoin-denominated [VERIFY: exact gas asset] |
| Execution | EVM-compatible | EVM-compatible [VERIFY] | EVM-compatible [VERIFY] | [VERIFY: execution environment] |
| Signature claim | Institutional validators; sub-second deterministic finality | Fee-free basic USDT transfers [VERIFY] | USDT-native chain economics [VERIFY] | Payments-processor-grade rails [VERIFY] |
| Mainnet status | Live Sept 16, 2026 | [VERIFY: current status] | [VERIFY: current status] | [VERIFY: current status] |
The Arc column is verified against Circle's published material; the others are kept deliberately at the level of broadly reported positioning, with sharper claims flagged rather than asserted — this table earns trust by what it refuses to guess. What's structurally clear: the category splits along issuer lines (Circle's dollar vs Tether's dollar vs processor-native rails), and that split — not feature checklists — is the real war.
What actually decides which rails win?
Not benchmarks. Every entrant is fast and cheap by construction; a payments chain that wasn't would be malformed. The deciding dimensions are distribution (whose dollar already flows through merchants, exchanges, and treasuries — Circle brings USDC's regulated-market footprint; Tether's ecosystem brings USDT's enormous offshore and emerging-market volume; a processor brings merchant relationships), regulatory posture (USDC's compliance-first positioning versus USDT's scale-first history is the oldest divide in stablecoins, now inherited by their chains), and credible neutrality for institutions (Arc's answer is eleven founding validators — BlackRock, Visa, Mastercard, DTCC among them — plus opt-in confidential transfers with auditor view keys and StableFX for onchain currency exchange, with EURC and regional stablecoins signaled; the full picture).
Where does Arc sit in the category?
As the regulated-market flagbearer. Its bet is that the next wave of stablecoin volume comes from institutions, fintechs, and businesses that need auditability and named accountability — hence the validator roster, the PoA-to-PoS roadmap, BUIDL deploying on-chain, and DTCC tokenization from H2 2027. The bet's risk is equally clear: the offshore, retail, and emerging-market flows where USDT dominates may stay loyal to Tether-aligned rails, and processor-native entrants may capture merchant flows before crypto-native chains reach them. Multiple winners is a live outcome — dollars are big enough. For builders, the practical read: pick the chain whose dollar your users already hold, and if that's USDC, Arc is now the purpose-built home (launching there, what it costs).
FAQ
What is a stablecoin Layer-1? A blockchain whose gas and design center are a stablecoin rather than a volatile native asset — built for payments, FX, and settlement first. Arc, Plasma, Stable, and Tempo are the prominent entrants.
Aren't stablecoins on Ethereum and Solana already? Yes, at enormous scale — but there they're passengers paying gas in ETH or SOL. Stablecoin chains make the dollar the native asset, which changes fee predictability and the whole payments UX (Arc vs Ethereum covers that trade directly).
Is Arc the biggest stablecoin chain? The category is too young for meaningful league tables — Arc's mainnet opened September 16, 2026, and rivals' statuses are evolving. What's checkable is design and backing, which is what this page compares.
Do all four use the same stablecoin? No — that's the war. Arc is USDC-native (Circle); Plasma and Stable sit in the USDT/Tether orbit; Tempo is processor-aligned. Chain choice largely inherits the USDC-vs-USDT choice.
Can one project deploy on several of them? Where they're EVM-compatible, porting is cheap in code — the expensive part is liquidity and users. Most projects should pick the chain matching their dollar and audience rather than fragmenting across four.
Building on the USDC side of the war? Mint, lock, and vest on Arc with Team Finance — audited contracts, fees flat in USDC.Open Team Finance →Sources: docs.arc.network, arc.io, Circle pressroom (Arc facts). Competitor rows kept to broadly reported positioning; all sharper claims flagged [VERIFY] for editorial confirmation before publication.
Last verified: August 2026