Lightning Node Implementations Compared: LND vs Core Lightning vs Eclair vs LDK
The Lightning Network runs on several independent node implementations, and that client diversity protects the L2 like it protects the chain. This compares LND, Core Lightning (CLN), Eclair and LDK by implementation type (daemon vs embeddable library), API, language, license and ecosystem.
Quick answer
Just like Bitcoin's base layer, the Lightning Network runs on several independent node implementations — and that client diversity protects the L2 the same way it protects the chain. This compares the 4 major implementations by what they actually are (a standalone node daemon vs an embeddable library), their API, language and license, and who builds on them. It is a live technical view over our open-source self-hosting catalog: the directory is the single source for each project's repo and license, and this page adds the comparison.
The quick decision: are you RUNNING a node or BUILDING an app? To run your own routing/payment node, LND (largest ecosystem, most app integrations), Core Lightning (modular, spec-aligned, scriptable) and Eclair (ACINQ, routing-focused) are the three daemons. LDK is different — it is a library you embed to build Lightning INTO your own wallet or service, not a node you run. All four are open-source and actively developed; running a less-dominant implementation strengthens network client diversity. Pick by your use case and operational comfort, and verify each project at its repository.
| Implementation | Lang / license | Type | API | Notable / who builds on it |
|---|---|---|---|---|
| LND (Lightning Network Daemon) Lightning Labs | Go MIT | Standalone daemon | gRPC + REST (lncli) | The most widely-deployed Lightning node and the largest app / tooling ecosystem; runs against a bitcoind / btcd / neutrino backend. The default many services build on. |
| Core Lightning (CLN) Blockstream / ElementsProject | C MIT | Standalone daemon | JSON-RPC (Unix socket); gRPC plugin | A modular, plugin-extensible implementation in C that leans on the BOLT specification as a reference. Lightweight; favoured where a clean, scriptable, spec-aligned node is wanted. |
| Eclair ACINQ | Scala Apache-2.0 | Standalone daemon (JVM) | JSON / HTTP API | By ACINQ, with a strong routing focus; the infrastructure behind ACINQ's node and the Phoenix mobile wallet. Scala / JVM deployment. |
| LDK (Lightning Development Kit / rust-lightning) Spiral / Lightning Dev Kit project | Rust Apache-2.0 | Library / SDK (not a daemon) | Language bindings (Rust + others) | A flexible toolkit by Spiral to EMBED Lightning into your own application (especially mobile and custom wallets) — you supply your own storage, chain source and networking, rather than running a fixed node. The build-it-yourself option. |
Directory fields (repo, license, language) are read live from the open-source self-hosting catalog (CC BY 4.0). See the Lightning Network, LND, Core Lightning and LDK glossary entries, the companion Bitcoin node implementations comparison, and our self-hosting guide. Verify each project at its repository before relying on it.
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Last reviewed June 21, 2026.