As of my last knowledge update in January 2022, 99designs is widely recognized as one of the leading platforms for hosting logo design contests. It has a large community of talented designers, and clients can launch contests to receive multiple design concepts before selecting the final logo.

However, the “best” platform can depend on specific preferences, needs, and budget. Other platforms that also host logo design contests and are worth considering include:

1. **DesignCrowd:** Similar to 99designs, DesignCrowd allows clients to post design briefs, and designers submit their concepts to compete for the project.

2. **Crowdspring:** Connects clients with a community of creatives, offering logo design contests as well as other design services.

3. **LogoMakr:** While not a contest platform, LogoMakr allows users to create logos by combining icons, shapes, and text, providing a DIY approach to logo design.

Before choosing a platform, consider factors such as the size of the designer community, pricing, and the quality of designs produced. It’s also a good idea to check for updated reviews and recent user experiences, as the landscape may have evolved since my last update.