Horizen (ZEN) is a blockchain ecosystem platform — originally launched as ZenCash in May 2017 (a fork of ZClassic, which was itself a fork of Zcash without the founders’ reward) — that evolved from a privacy-focused cryptocurrency into a full sidechain platform. Using the Zendoo protocol, developers can deploy custom blockchains (sidechains) that connect to the Horizen mainchain for cross-chain transfers, with the mainchain secured by ZK proofs verifying each sidechain’s validity. Horizen operates one of the largest node networks in crypto (20,000+ nodes), incentivized through ZEN block reward splits.
| Stat | Value |
|---|---|
| Ticker | ZEN |
| Price | $5.83 |
| Market Cap | $104.74M |
| 24h Change | +2.2% |
| Circulating Supply | 17.95M ZEN |
| Max Supply | 21.00M ZEN |
| All-Time High | $165.92 |
| Contract (Base) | 0xf43e...9229 |
| Contract (Horizen) | 0x57da...9280 |
How It Works
- Equihash PoW mainchain — The Horizen mainchain uses the same Equihash algorithm as Zcash (GPU mining). ZEN is the mainchain token. Maximum supply of 21 million ZEN (same as Bitcoin).
- Incentivized node network — Unlike most blockchains where nodes receive nothing, Horizen pays a portion of each block reward to full nodes (Secure Nodes and Super Nodes). This incentivizes the operation of over 20,000 nodes globally — one of the densest node networks in crypto.
10% of block reward → miners
Wait — actual split: 60% miners, 20% Secure Nodes, 10% Super Nodes, 10% Horizen treasury - Shielded transactions — Horizen supports Zcash-style shielded transactions using zk-SNARKs (Sapling) for privacy. Unlike Zcash, both t-addresses (transparent) and z-addresses (shielded) are supported.
- Zendoo SDK — A sidechain SDK that allows developers to deploy custom blockchains connected to the Horizen mainchain. The mainchain verifies sidechain validity using ZK proofs without understanding the sidechain’s logic — trustless cross-chain interoperability.
- EON sidechain — Horizen’s flagship EVM-compatible sidechain (EON) launched in 2023, enabling Ethereum-compatible smart contracts on the Horizen ecosystem.
Tokenomics
| Parameter | Value |
|---|---|
| Ticker | ZEN |
| Max Supply | 21,000,000 (21 million) |
| Consensus | Equihash PoW |
| Launch | May 30, 2017 (as ZenCash) |
| Block reward split | ~60% miners / 20% Secure Nodes / 10% Super Nodes / 10% treasury |
| Halving | Similar to Bitcoin — supply caps at 21M |
Use Cases
- Private transactions — Shielded (z-address) transfers on the Horizen mainchain.
- Sidechain deployment — Deploy custom blockchains with Zendoo SDK.
- Node operation — Run a Secure Node or Super Node to earn ZEN rewards.
- EON DeFi — EVM-compatible DeFi on Horizen’s EON sidechain.
- Mining — GPU Equihash mining for ZEN.
History
- 2016 — ZClassic (ZCL) forks from Zcash removing the 20% founders’ reward. Becomes purely community-mined.
- 2017-05-30 — ZenCash (ZEN) forks from ZClassic. Added domain fronting for communication security, encrypted messaging, and a treasury model to fund development. Robert Viglione and Rolf Versluis found the project.
- 2018-06 — ZenCash suffers a 51% attack. Attacker double-spends approximately 23,152 ZEN (~$550K at the time). Horizen responds with upgraded protection mechanisms.
- 2018-08 — ZenCash rebrands to Horizen. Shift from privacy coin to blockchain platform narrative.
- 2020 — Zendoo SDK announced — the sidechain framework enabling custom chain deployment.
- 2021 — ZEN peaks at approximately $167 in May 2021. The node network grows past 20,000 nodes.
- 2022–2023 — Bear market. Horizen continues Zendoo development.
- 2023-05 — EON mainnet launches — Horizen’s EVM-compatible sidechain. Ethereum dApps can deploy on EON with ZEN as gas.
- 2024 — EON ecosystem development continues. Horizen EON positions as an EVM sidechain with ZK-backed security from the Horizen mainchain.
Common Misconceptions
“ZEN is just a Zcash fork.”
ZEN derived from ZClassic (a ZCash fork without the founders’ reward) but has evolved into a distinct platform. Horizen’s sidechain SDK (Zendoo), node incentive model, and EVM-compatible EON chain make it fundamentally different from Zcash.
“The 51% attack means Horizen is insecure.”
The 2018 attack exploited vulnerabilities that were subsequently mitigated. Horizen’s large node network (20,000+) provides additional decentralization, and the Delayed Block Submission protection was added as a 51% attack resistance measure.
Social Media Sentiment
Horizen has a moderate but dedicated community that appreciates both its privacy roots and platform ambitions. The incentivized node network is frequently cited as innovative. EON’s EVM compatibility opened the project to Ethereum developers. Skeptics note that the sidechain adoption has been limited and ZEN competes in a crowded privacy coin and L1 space. The rebranding to Horizen successfully shifted perception from “privacy coin” to “blockchain platform.”
Last updated: 2026-04