The ideal number of influencers for a specific marketing campaign depends on the following factors:

1. Campaign Goals: Depending on your objectives (increasing brand awareness, product launches, or enhancing social media presence), you might need one high-impact influencer or several influencers with smaller, diverse audiences.

2. Budget: Larger budget campaigns typically work with more influencers. However, if there’s limited budget, focus on a few quality influencers who align well with your brand and can deliver high engagement.

3. Brand’s Niche: Depending on your industry, you might need more influencers to reach a broad spectrum of prospective customers.

4. Campaign Duration: For a long-term campaign, marketers can integrate more influencers over time, while a one-off or short campaign might require fewer influencers.

5. Audience Analytics: Detailed insights into the audience demographics, interests, and behaviors of your potential influencers can help determine the number needed to optimally reach your target market.

Platforms like Flinque offer tools for influencer discovery and audience analytics, helping brands identify and connect with the right influencers, therefore easing the decision-making process regarding the count of influencers necessary.

Remember, the effectiveness of a campaign isn’t necessarily defined by the number of influencers, but rather their relevance, engagement rate and how well they fit with the brand’s image. While comparing platforms, consider their approach to influencer discovery and campaign planning. How you utilize these features will depend on your specific campaign objectives and team requirements.