> For the complete Linea documentation index, see [llms.txt](/llms.txt). > Agents can fetch this page as Markdown at [https://docs.linea.build/stack.md](https://docs.linea.build/stack.md). # Lineth Stack Lineth (formerly the Linea Stack) is the collection of protocol components, onchain contracts, and operational capabilities that operators use to deploy and run their own Layer 2 or Layer 3 networks, inheriting a [ZK proof](/protocol/reference/zero-knowledge-glossary#zero-knowledge-proof)**Zero-knowledge proof** A cryptographic method that allows an individual to prove that a statement is true without conveying any additional information. This is useful for scaling blockchain networks through rollups, because it reduces the amount of information you have to provide to lower layers. system and Ethereum-compatible execution. For how Lineth relates to the public Linea network, see [Linea and Lineth](/protocol/linea-vs-lineth). Get started with Lineth: [ Evaluate Lineth Assess deployment models, security, and trust assumptions. ](/stack/evaluate)[ Design a deployment architecture Choose components and settings for your Lineth deployment. ](/stack/deployment)[ Build and test a local deployment Run a local Lineth Stack settling to a local L1 or Sepolia. ](/stack/how-to/run-local-lineth-stack)[ Learn about protocol internals Explore how the Lineth protocol works under the hood. ](/protocol) note In the Lineth Stack documentation, an **operator** is the entity or consortium responsible for deploying, administering, and running the network infrastructure, contracts, keys, access controls, and operational procedures for a network built on Lineth. ## Why Lineth exists Configurable Lineth supports operators who need more control than a L1 network can offer while preserving Ethereum compatibility and configurable security assumptions. Whether you are deploying a private network for regulated environments, you favor selective data availability, or are operating a fully public network, Lineth gives you the components and operational model to do so. As blockchain adoption grows, many organizations encounter a common set of constraints: - L1 transactions can be expensive and slow. - Public networks do not offer sufficient privacy or control. - Bespoke infrastructure is costly to build and difficult to maintain. - Regulatory, governance, and operational requirements are hard to enforce on open systems. - Interoperability between private systems and public blockchains remains fragmented. Lineth lets you run an Ethereum-equivalent network tailored to enterprise requirements, using [open source technology](/protocol/reference/repos), while remaining anchored to the same protocol foundations as [Linea Mainnet](/network). The interoperability between Linea and Ethereum allows networks built on Lineth to use Ethereum's digital assets and build within the open and modular DeFi ecosystem. ## What Lineth provides At a high level, Lineth provides: - **Cost-efficient transactions:** Greatly reduce transaction costs compared with Ethereum L1 execution by moving execution to a network built on Lineth while using the selected [finalization layer](/protocol/reference/zero-knowledge-glossary#finalization-layer)**Finalization layer** The blockchain where a Lineth deployment submits proofs and state commitments for verification and hard finality. If the finalization layer is Ethereum (an L1), the deployment is an L2. If the finalization layer is Linea (an L2), the deployment is an L3. for settlement. - **Fast transactions:** Linea's 1s block times support near-instant [soft finality](/protocol/reference/zero-knowledge-glossary#soft-finality)**Soft finality** The point at which a block is confirmed and committed on the L2 itself, before its state is committed on the finalization layer. On Linea Mainnet, soft finality is reached in about 1 second.. - **Ethereum-anchored interoperability:** Access Ethereum liquidity through rollup and bridge components, with trust assumptions that depend on the deployment model, data availability design, verifier configuration, and upgrade authority. - **An Ethereum-compatible execution environment:** Run an Ethereum-equivalent network. - **Composability:** Use bridge components to interact with digital assets and compose with the largest open, modular DeFi ecosystem. - **Flexible deployment models:** Deploy rollup networks with customizations to suit your privacy, compliance, and availability requirements. - **Privacy and data availability controls:** Keep transaction data private as required, while selecting the data availability and finalization design that fits the deployment's trust model. - **Operational clarity and control:** Clearly defined components, responsibilities, and failure boundaries so operators can reason about risk, uptime, and compliance. - **Interoperability by design:** Enable controlled interaction with other networks and public blockchains through standardized bridge components. ## Who the stack is for Lineth serves technical operators and infrastructure teams who: - Need to run and operate their own network built on Lineth. - Require privacy, governance, or regulatory controls not available on public networks. - Want infrastructure that can be designed for production use with the appropriate deployment, operations, security, and governance model. - Are responsible for deployment, monitoring, maintenance, and incident response. It assumes familiarity with distributed systems and blockchain infrastructure, but does not require deep protocol expertise. ## Start building Ready to build? [Contact support](/support) to inquire about our rollup-as-a-service or to access our dedicated design team who will configure the stack to your business need