Ethereum vs Tether
Ethereum (ETH) ranks #2 by market capitalization at $312.3B and Tether (USDT) ranks #3 at $184.1B, as of October 12, 2026. Ethereum has no fixed supply cap; Tether has no fixed supply cap. Ethereum is available on 32 exchanges we have verified and Tether on 21; 20 list both.
Verified How we verify
Side-by-Side
 Ethereum |  Tether | |
|---|---|---|
| Market cap rank | #2 | #3 |
| Price | $2,557 | $0.999 |
| Market cap | $312.3B | $184.1B |
| Fully diluted valuation | $312.3B | $189.6B |
| 24-hour volume | $9.7B | $38.3B |
| Circulating supply | 122.1M ETH | 184.3B USDT |
| Maximum supply | No fixed cap | No fixed cap |
| All-time high | $4,946 (August 24, 2025) | $1.32 (July 23, 2018) |
| Change from all-time high | −48.3% | −24.5% |
| 7-day change | −5.2% | −0.1% |
| 30-day change | +2.0% | −0.1% |
| Category | layer-1 | stablecoin |
| Chains | the Ethereum network | 11 chains including Ethereum, Klay Token, and Tezos |
| Launched | 2015 | — |
Where You Can Buy Each
| Ethereum | Tether | |
|---|---|---|
| Exchanges listing it | 32 | 21 |
| Countries and US states with a ranked buy page | 70 | 70 |
20 exchanges list both; 70 locations have a ranked buy page for both.
Frequently Asked Questions
- Which has the larger market cap, Ethereum or Tether?
- Ethereum, by about 1.7× as of October 12, 2026: $312.3B for Ethereum against $184.1B for Tether.
- Does Ethereum or Tether have a fixed supply?
- Neither has a fixed maximum supply.
- Where can I buy both Ethereum and Tether?
- 20 exchanges we have verified list both. Pick your location on the buy pages to see which serve you and what a $500 purchase costs.