Limen Edge
Show HN: I built a middleware agent that turns PLC data into REST/gRPC APIs
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What is Limen Edge?
Limen Edge is a self-hosted edge agent that turns raw PLC data into clean REST and gRPC APIs. It is positioned as an API layer for factory floors, with support for industrial protocols including Modbus TCP, OPC UA, and EtherNet/IP.
The product is designed to sit close to industrial equipment and expose operational data in a more usable way for software systems. Based on the website, it emphasizes local, on-premise operation rather than cloud dependence, which fits environments where data locality, latency, or plant-network constraints matter.
Its getting-started documentation suggests an installation-and-first-run workflow, with separate documentation for command-line behavior and configuration. That implies the tool is meant for technically capable users who need to install, configure, and operate an edge service in an industrial environment.
Limen Edge appears best suited for factories, industrial automation teams, and developers who need to bridge PLC-connected systems with modern APIs. The site’s core message is that it simplifies raw industrial connectivity into something software teams can integrate with more easily.
Limen Edge pricing
Pricing model: Freemium
The website content available here does not show any pricing, free tier, or paid plan details for Limen Edge. The public landing page describes the product as a self-hosted edge agent for factory-floor API access, but no plan names, inclusions, or billing terms are visible in the fetched content.
Limen Edge pros
- Self-hosted edge deployment
- No cloud required
- Turns PLC data into REST APIs
- Turns PLC data into gRPC APIs
- Supports Modbus TCP
- Supports OPC UA
- Supports EtherNet/IP
- Targets factory-floor use cases
- Designed for industrial environments
- Runs close to the data source
- Useful for on-premise architectures
- Reduces need for custom protocol handling
- Simplifies integration with software systems
- Has getting-started installation docs
- Has dedicated CLI documentation
- Has configuration documentation
Limen Edge cons
- Limited public detail on the docs page
- Pricing is not shown on the site
- No free-tier information found
- No explicit trial information found
- No explicit enterprise plan information found
- Few product examples on the landing content
- No screenshots or architecture diagrams in the fetched text
- Feature depth beyond protocol support is unclear
Frequently asked questions about Limen Edge
What is Limen Edge?
Limen Edge is a self-hosted edge agent for industrial settings that converts raw PLC data into clean REST and gRPC APIs. The website describes it as an API layer for factory floors.
Which industrial protocols does it support?
The website specifically names Modbus TCP, OPC UA, and EtherNet/IP as supported protocols. These are the industrial connectivity options highlighted in the public product description.
Does Limen Edge require cloud services?
No. The public website explicitly says it is self-hosted and that no cloud is required, which suggests it is intended to run locally or on-premise near industrial equipment.
Who is Limen Edge for?
It is aimed at industrial automation and factory-floor users who need to expose PLC data through modern APIs. Developers and operations teams integrating plant data into software systems are the most likely audience based on the site positioning.
What kinds of APIs does Limen Edge create?
The site says it turns raw PLC data into REST and gRPC APIs. Those are the two API styles explicitly mentioned in the product description.
What does the getting-started documentation cover?
The documentation navigation indicates that the getting-started section covers installation and the first run. The docs also point to separate sections for CLI command flags and configuration YAML shape, includes, and related setup details.
Is Limen Edge meant for public internet deployment?
The site does not present it as a public SaaS API. Its self-hosted, no-cloud positioning suggests it is designed for private industrial networks and edge deployments.
Does the website show any pricing plans?
No pricing details are visible in the website content available here. The fetched public material does not list a free tier, subscription plans, or included features by plan.
What makes Limen Edge different from a generic API gateway?
Its focus is on industrial data sources and factory-floor connectivity rather than generic HTTP traffic. The public messaging centers on translating PLC data from protocols like Modbus TCP, OPC UA, and EtherNet/IP into usable REST and gRPC APIs.
What should I expect from setup?
The docs indicate a setup path that starts with installation and a first run, then continues into CLI usage and configuration. That suggests a technical deployment process rather than a one-click hosted onboarding flow.