DataForSEO

DataForSEO offers a comprehensive suite of APIs for SEO and SEM analytics, which aligns with the core concept of a keyword research SaaS. While it doesn't explicitly mention 'People Also Ask Extraction' or 'Export Results to CSV' as direct features of its keyword APIs, it provides the underlying data and infrastructure (APIs) that would allow a user to build tools with these capabilities. It directly offers Google Autocomplete Suggestions, real-time search trends via its Trends API, and Reddit data through its Social Media API. It also provides semantic keyword suggestions through its Labs API and location-based filtering for trends. The pricing is transparent and clearly laid out.