Pricing is useful only when each tier is tied to a real operating requirement. Treat the following bands as the source page's retained planning ranges, not as verified current prices from named vendors.
Free Tier ($0/month)
Use a free source when it can answer the research question at hand. Google Keyword Planner can support demand exploration and related-term discovery, while Search Console is useful for queries associated with your own verified properties. The limitation is scope: free sources may not provide the competitive context, bulk workflow, historical views, or modeled difficulty data needed for broader research.
Entry-Level Paid ($30-$80/month)
The source places lightweight paid plans in this band. Before buying, verify the actual query allowance, export limits, supported markets, user access, and whether the plan includes the SERP or competitor data you need. This tier is appropriate only when those verified limits cover the intended workflow.
Mid-Range Professional ($100-$200/month)
The source uses this as a professional planning band and notes multi-user access of 2-5 seats as a typical example. Do not assume current plans from Ahrefs, Semrush, Moz, or any other vendor match that description without checking their current terms. The purchase case is stronger when higher limits, competitor analysis, reporting, or team access are used consistently.
Enterprise ($300-$500+/month)
The source associates this range with higher-volume API use, larger teams, custom reporting, and continuous research across larger portfolios. Treat those capabilities as items to verify in the exact plan. Upgrade only when a lower tier creates a measurable operational constraint that the higher plan removes.