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What is the difference between mainnet and testnet?

Published Sep 18, 2026Updated Sep 19, 2026Last verified Sep 18, 2026Requests recorded in this site’s own server logs, with the crawler identity checked by reverse DNS or IP range.Meta34Google32OpenAI15Anthropic5Parallel4Ahrefs2Apple1Microsoft1Perplexity1Yandex1First collected Sep 18, 2026Recent requestsAhrefsOct 31, 2026OpenAIOct 28, 2026Meta · unverifiedOct 12, 2026MicrosoftOct 10, 2026AhrefsOct 10, 2026Meta · unverifiedOct 9, 2026OpenAIOct 6, 2026Meta · unverifiedOct 4, 2026Meta · unverifiedOct 4, 2026Meta · unverifiedOct 3, 2026Meta · unverifiedOct 3, 2026Meta · unverifiedOct 3, 2026
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Quick answer

A mainnet is a blockchain's live production network, where tokens and transactions have real economic value. A testnet is a separate network with the same or similar software, used to test applications and protocol upgrades "in a production-like environment before deployment to Mainnet." Testnet tokens usually come free from faucets and are meant to have no value. Testnets can also be retired or reset, while a mainnet is meant to run indefinitely.

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Answer

Ethereum currently recommends Sepolia for application testing and Hoodi for validator and staking testing [2]. Solana runs separate Devnet and Testnet clusters, and tokens on both are "not real" [6].

Sources

  1. academicBlockchain Technology Overview (NISTIR 8202) — National Institute of Standards and Technology (via arXiv) · accessed Nov 10, 2026 · Evidence page
  2. officialNetworks — ethereum.org · accessed Nov 10, 2026 · Evidence page
  3. officialHolesky and Hoodi Testnet Updates — Ethereum Foundation Blog · accessed Nov 11, 2026 · Evidence page
  4. officialPectra Mainnet Announcement — Ethereum Foundation Blog · accessed Nov 10, 2026 · Evidence page
  5. officialHolešky Testnet Shutdown Announcement — Ethereum Foundation Blog · accessed Nov 11, 2026 · Evidence page
  6. officialSolana Clusters — Solana Foundation · accessed Oct 31, 2026 · Evidence page
  7. officialUsing a test network — Bitcoin Core Onboarding · accessed Nov 11, 2026 · Evidence page
  8. officialGenesis block — Bitcoin Wiki · accessed Nov 11, 2026 · Evidence page
  9. newsEthereum Launches Long-Awaited Decentralized App Network — CoinDesk · accessed Oct 31, 2026 · Evidence page
  10. officialEIP-155: Simple replay attack protection — Ethereum Improvement Proposals · accessed Nov 11, 2026 · Evidence page
  11. officialThe Merge — ethereum.org · accessed Nov 10, 2026 · Evidence page
  12. officialTaproot — Bitcoin Optech · accessed Nov 11, 2026 · Evidence page