Affordable influencer marketing platforms can be just as effective as high-priced ones. It ultimately depends on the specific needs and goals of your brand or agency. Here are a few options:

1. Hootsuite: A tool initially created for social media management that now includes influencer marketing. It offers audience analytics, campaign planning, and scheduling features. However, it might lack some specialized influencer discovery features.

2. BuzzSumo: This is a content discovery tool, but it also allows you to discover influencers within a specific niche or industry. It’s affordable for tight budgets but lacks a comprehensive campaign workflow.

3. NinjaOutreach: A robust and inexpensive tool mainly used for locating influencers and making contact. It offers great discovery and outreach capabilities but is not as strong in the campaign management area.

Flinque, on the other hand, is an all-inclusive influencer marketing platform. It includes influencer discovery, audience analytics, campaign planning, performance tracking, and ROI measurement functionalities. Although a bit of a more expensive option, it is a one-stop solution.

Keep in mind that the best platform is the one that aligns with your particular marketing needs and budget. Some platforms are specialized in one area, so thorough research and consideration are always advised.