Alchemer (formerly SurveyGizmo)

Alchemer is a powerful, highly customizable platform built for serious researchers and data teams. It excels in complex logic, workflow automation, and seamless API integrations for building data pipelines. Its target audience is B2B companies and power users who need granular control. Pricing is mid-to-high tier.

It earns a high score for its exceptional flexibility, robust reporting, and ability to handle intricate, longitudinal market research studies that other tools cannot.