Alpaca vs Arara

Alpaca is a registered securities broker with commission free stock trading specifically for developers and trading bots.

Alpaca offers a commission free stock trading API purpose built around automated investing. This allows developers to build algorithms and programs to trade stocks. Features include; real-time market data, a REST API and WebSocket stream, an algorithm management dashboard, paper trading features, Slack community, and more.

Arara is the battery-free wheel-mounted bicycle lighting system.

Arara is the bicycle lighting system that will never need a battery. The wheel-mounted lights are powered by strong neodymium magnets. When a bike’s wheel starts to spin, the lights move past the magnets and the generated electric energy is stored in the capacitor. When it's charged, Arara lights up.

Arara makes a bike easily recognizable from every angle at night, is available in variety of colors, is water-resistant, lightweight, and works at temperatures down to -15 degrees F.