We build blockchain layers.

Custom blockchain development is the engineering of a new blockchain network — consensus, execution, bridges, developer tooling and operational infrastructure — for cases where existing chains don't meet the product requirements. Most 'custom chain' projects in 2026 are L2 rollups rather than sovereign L1s, because rollups inherit security from Ethereum while still offering meaningful customization.

Most teams should deploy on an existing L2 — custom chains are genuinely right only for gas-abstraction needs, permissioning requirements, unique execution semantics, or throughput that saturates shared sequencers. If your product works on Arbitrum, Base or Optimism, build there and get security, liquidity and ecosystem for free.

Cost is driven by layer type, customization depth, bridge design, data-availability choice, decentralization timeline and validator program scope. A stock OP Stack rollup with a canonical bridge and centralized sequencer is the lightest path; a sovereign Cosmos SDK chain with an independent validator set is an order of magnitude heavier.

Consensus and execution configuration, bridge infrastructure, data-availability integration, sequencer operations, validator program design, RPC infrastructure, block explorer deployment, developer SDK and coordination of third-party security audits sized to the chain's expected TVL. The applications that run on the chain and the tokenomics of any native token sit outside the build scope.

OP Stack is the default for most 2026 L2 projects given its ecosystem size and Superchain interop; Arbitrum Orbit fits when Arbitrum-specific features matter, and Polygon CDK or zkSync Stack fit when zero-knowledge properties are the point. The choice depends on where your users and apps already are, not on a raw technical comparison.

Through canonical bridges that ship with each rollup stack plus mature general-purpose bridges like LayerZero, Wormhole, Axelar and CCTP for broader interoperability — custom bridges are avoided where possible. Bridge security is chain security, so audit time scales with the TVL expected to cross, with independent reviews from bridge-focused audit firms before mainnet.

Yes — permissioned Avalanche subnets, access-controlled OP Stack rollups, and Hyperledger Besu or Canton Network deployments are all in scope. The core engineering shape is similar to a public chain, but the permissioning module, validator recruitment and reporting layer differ substantially.

By economic model and security tolerance, not preference — Ethereum blobs are the most secure and most expensive option, while Celestia, EigenDA and Avail trade some security assumptions for lower cost. Each additional DA option chosen is another security assumption that needs its own audit attention.

Every chain we build spends at least eight weeks on testnet with real external participation — apps deploying, bridges integrating, validators running nodes — before mainnet is even considered. A chain's credibility gets built in that testnet phase or not at all; we don't shortcut it regardless of launch pressure.

Your own chain is the right call when the thing making you different lives at the protocol layer. Custom fee economics, a named validator set, a specific privacy model, block times an existing network cannot give you — those genuinely need their own chain. Where an existing L2 already does what you need, deploying there gets you to users far sooner and you keep the option to migrate later. We will map your requirements against both paths honestly, and the answer is usually clear once the list is on the table.