If you're a product team or SaaS builder looking for a comprehensive tool to track user behavior, experiments, and analytics all in one place, go with PostHog. Its open-source and self-hostable nature makes it flexible but be prepared for a learning curve and potential costs as your event volume increases. This choice is not ideal if you're simply seeking straightforward privacy analytics or prefer to avoid managing high usage.
On the other hand, if you're a solo creator or a small business focused on planning and scheduling social media posts, Buffer is your best bet. Its user-friendly interface and support for major social networks make it accessible, even for beginners. However, if you require deeper social analytics or manage multiple channels on a tight budget, you may want to reconsider, as costs can escalate quickly with its per-channel pricing.