Elixir SDK Is Available for Feature Management & Experimentation

We know that great developer tools should fit seamlessly into the existing workflows and tech stacks that teams rely on. That’s why Harness Feature Management & Experimentation (FME) continues to expand its compatibility across the languages and frameworks developers use most. Today, we’re adding another to the list: the Elixir SDK thin client—now available for general use!

Elixir Developers Can Feature Flag Without Modifying Their Tech Stack

The new Elixir SDK thin client enables teams to integrate Harness feature flagging and event tracking directly into their Elixir applications. Built to be lightweight and efficient, this SDK leverages Split Daemon (splitd) to connect to Harness FME without requiring complex workarounds.

Now, Elixir developers can natively manage feature flags and run experiments—without modifying their existing tech stack or implementing custom solutions.

This feature was initially developed in collaboration with our customer Cars.com, which implemented a minimum viable version of the Elixir SDK to fit their needs. Seeing the broader potential, our engineering team enhanced it for full Harness compliance, and now we’re rolling it out to all customers!

Why a Thin SDK Matters

Elixir is widely used for building scalable, fault-tolerant applications, making it a natural fit for industries handling high traffic and real-time data. By introducing an Elixir thin client SDK, we’re ensuring that teams can:

• Improve Performance: Thin clients have a small footprint and low latency, ensuring real-time flag evaluations at scale.
• Enhance Security & Compliance: No sensitive data needs to be passed outside the local network.
• Simplify Maintenance: Feature flag implementation remains consistent and standardized with other FME SDKs in your organization, reducing the need for custom code or workarounds.

Key Use Cases for the Elixir SDK

With this release, Elixir teams can now:

• Enable Native Feature Flagging – Seamlessly integrate feature management into their applications without external dependencies.
• Simplify Multi-Language Support – Organizations running Elixir alongside other languages (like Python, Ruby, or JavaScript) can ensure consistent feature flag management across their stack.
• Scale with Confidence – The SDK is optimized for high-traffic applications, allowing companies to safely deploy and experiment at scale.

How to Get Started

Ready to start using the Elixir thin client SDK? Here’s how:

1. Install the SDK with splitd – This SDK works in combination with splitd, a lightweight process designed for thin clients. Check out our guide here to get up and running.
2. Implement Feature Flags in Your Elixir App – Use the SDK to evaluate feature flags, track events, and manage rollouts directly within Elixir.
3. Experiment with Confidence – Take full advantage of Harness FME to optimize and fine-tune your releases with data-driven decisions.

The addition of the Elixir SDK underscores our commitment to making feature management accessible, scalable, and secure for every development team—no matter their tech stack.

Check out the documentation to learn more, and let us know how your team is using it!