First, thanks for the nice feedback.
We optimized our OCR server infrastructure for the two tiers (PRO and PRO PDF plan) that we are currently offering. This keeps our billing system reliable, simple and low cost. That is also why we do not offer lower tiers. We have no payment or subscription logic for other tiers in place. Should you need more than 300,000 conversions per month at some point, you can do so by using multiple API keys.
Price comparison: 300,000 Text Detection units with the Google Cloud Vision OCR API cost US$450 (as of November 2024) and with our service it is only US$ 30.
→ So even if you would “only” use 50K units, with our OCR API that is US$ 30, and with Google API it is US$ 75.