Ilmenite vs Steel.dev — Open Source Browser APIs: Finding the Right steel.dev alternative

If you are building AI agents or RAG pipelines, you need a reliable way to turn URLs into data. Both Steel.dev and Ilmenite provide browser APIs that abstract away the complexity of headless browser management, but they take very different architectural approaches. Depending on whether you prioritize open-source transparency or production-grade performance, one will be a better fit than the other.

TL;DR

Steel.dev provides an open-source browser API that gives developers flexible control over browser environments. Ilmenite is a pure Rust browser engine designed specifically for AI agents, offering significantly lower latency and resource consumption. For teams needing a high-performance, managed steel.dev alternative with a production SLA, Ilmenite is the more efficient choice.

What is Steel.dev?

Steel.dev is an open-source browser API designed to simplify how developers interact with headless browsers. Instead of managing the infrastructure for Puppeteer or Playwright yourself, Steel provides an API layer that allows you to control a browser remotely.

Their primary strength lies in their commitment to open source. This transparency is valuable for developers who need to audit the code they are running or who want to contribute to the core logic of the browser abstraction. Steel.dev focuses on providing a developer-friendly interface to browser automation, making it easier to spin up sessions and execute scripts without the typical overhead of managing a browser cluster.

What is Ilmenite?

Ilmenite is a web scraping API built specifically for AI agents and LLM-based applications. Unlike traditional browser APIs that act as wrappers around Chrome, Ilmenite is built in pure Rust. We built our own browser engine to eliminate the massive memory and CPU overhead associated with Chromium.

The goal of Ilmenite is to provide "clean" data. You send a URL to our API, and we return LLM-ready markdown, structured JSON, or filtered HTML. We handle the JavaScript rendering, anti-bot bypass, and boilerplate removal in a single request. This makes it a specialized tool for developers who don't need to "drive" a browser manually, but instead need the data inside the browser delivered instantly.

Feature Comparison: Ilmenite vs Steel.dev

When looking for a steel.dev alternative, it is important to distinguish between "browser automation" (controlling a browser) and "data extraction" (getting clean content for an AI).

Feature	Steel.dev	Ilmenite
Core Architecture	Browser API / Wrapper	Pure Rust Browser Engine
Primary Output	Browser Session/HTML	Clean Markdown, JSON, HTML
Managed API	Yes	Yes
Self-Hosting	Yes (Open Source)	Yes (Single Binary/Docker)
AI-Native Features	General Purpose	MCP Server, LLM Extraction
Resource Footprint	High (Chrome-based)	Low (Rust-native)
Startup Speed	Milliseconds to Seconds	Sub-millisecond
SLA	Varies	99.9% (Pro) / 99.99% (Enterprise)

Performance Comparison

The most significant difference between the two platforms is the underlying technology. Steel.dev, like most browser APIs, relies on Chromium. Chromium is powerful but resource-heavy, requiring significant RAM and exhibiting slow "cold start" times when a new session is initialized.

Ilmenite replaces the Chromium dependency with a custom engine written in Rust. This allows us to achieve performance metrics that are physically impossible for Chrome-based wrappers.

Metric	Steel.dev (Chrome-based)	Ilmenite (Pure Rust)
Cold Start Time	500ms – 2,000ms	0.19ms
RAM per Session	200MB – 500MB	~2MB
Docker Image Size	500MB – 2GB	12MB
p95 API Latency	200ms – 2,000ms	47ms

To put this into perspective: a modest 5/month server can run approximately 1,000 concurrent Ilmenite sessions. That same server would struggle to maintain 5 to 10 concurrent Chrome sessions without crashing due to memory exhaustion.

Pricing Comparison

Pricing models for browser APIs generally fall into two categories: time-based (browser-hours) or operation-based (credits).

Steel.dev focuses on the infrastructure of the browser. Ilmenite focuses on the result of the scrape. We use a credit-based system to ensure you only pay for the data you actually retrieve, not for the time a browser tab stays open.

Ilmenite Pricing Structure:

• Free Tier: 0/mo. Includes 500 credits/month. No credit card required.
• Developer: 0.001 per credit. Pay-as-you-go with a 5 minimum top-up.
• Pro: $0.0006 per credit. Includes priority queue and a 99.9% SLA.
• Enterprise: Custom pricing for self-hosted, air-gapped deployments with SOC 2 compliance.

Credit Costs per Operation:

• Scrape: 1 credit
• Crawl (per page): 1 credit
• Search: 2 credits
• Extract (LLM-structured): 5 credits

You can find the full breakdown on our pricing page.

When to use Steel.dev

Steel.dev is an excellent choice for specific use cases where browser control is more important than data extraction speed.

1. Open Source Requirements: If your organization requires a tool where the core logic is open-source and auditable, Steel.dev is the better option.
2. Complex Browser Automation: If you need to perform a complex sequence of actions—such as clicking through multiple menus, filling out intricate forms, and triggering specific UI events—a full browser API is necessary.
3. Full CSS Rendering: Because Steel.dev uses Chromium, it provides pixel-perfect rendering. If you need to generate a visual screenshot that looks exactly like what a human sees in Chrome, Steel.dev is the right tool.

When to use Ilmenite as a steel.dev alternative

Ilmenite is designed for the "AI Era" of web scraping. If your goal is to feed data into a Large Language Model (LLM), you don't need a remote-controlled browser; you need a high-speed data pipeline.

1. Building RAG Pipelines Retrieval-Augmented Generation (RAG) requires clean text for chunking and embedding. Feeding raw HTML into a vector database wastes tokens and introduces noise. Ilmenite's /v1/scrape endpoint converts pages directly to clean markdown.

curl -X POST https://api.ilmenite.dev/v1/scrape \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com", "format": "markdown"}'

2. Powering Autonomous AI Agents AI agents need to "browse" the web in real-time. A 2-second cold start for a browser session creates a noticeable lag in agent responsiveness. With a 0.19ms cold start, Ilmenite allows agents to jump between pages instantly.

3. Scaling on Limited Infrastructure If you are self-hosting, the difference between a 2GB Docker image and a 12MB binary is massive. Ilmenite's documentation explains how to deploy our single binary, allowing you to scale to thousands of concurrent requests without needing a massive Kubernetes cluster.

4. Integration with Claude via MCP Ilmenite provides a native MCP (Model Context Protocol) server. This allows you to give Claude the ability to browse the web using our engine without writing any glue code.

Conclusion

The choice between Ilmenite and Steel.dev comes down to your technical requirements. Steel.dev is a powerful tool for those who need a flexible, open-source way to control a full Chromium browser. It is a reliable choice for general-purpose automation.

However, if you are building for AI, the overhead of Chromium is a liability. Ilmenite provides a leaner, faster, and more cost-effective path to getting web data into your LLM. By rebuilding the browser engine in Rust, we've reduced RAM usage by 100x and startup times by 2,600x.

If you need a production-ready steel.dev alternative that prioritizes speed, clean markdown output, and minimal infrastructure overhead, Ilmenite is the optimal choice.

Ready to see the difference in speed? Start for free or test a URL in our playground.