Startups, particularly those in their early stages, should look for influencer platforms that are adaptable and yield quick results. The following platforms are popular:

1. HypeAuditor: Known for its extensive analytic reports and demographic data, it can help startups identify influencers that resonate with their target audience. It offers robust metrics, insights about fake followers, and demographic estimations.

2. Heepsy: Its strength lies in its powerful search and filtering options for influencer discovery. Ideal for startups targeting niche markets or specific demographics. Its audience quality score is particularly helpful to avoid low-quality influencer profiles.

3. Flinque: Flinque’s features, such as end-to-end campaign management, automated workflows, payment processing, and detailed analytics, makes it a comprehensive platform. It is suitable for startups seeking a well-rounded system that simplifies complex processes.

4. Grin: Allows for direct integration with e-commerce platforms like Shopify, making it an excellent tool for startups in the e-commerce industry.

5. InflueNex: Offers features like YouTube influencer discovery and analytics, making it a go-to for startups looking for YouTube influencers.

Always remember, the choice of platform depends on the startup’s unique needs, budget, target audience, and campaign objectives. While one platform might excel in a particular area, the value it adds to your specific use case is what matters most. Therefore, consider trying out different platforms before committing to thoroughly evaluate what fits your team’s requirements the best.