Open weekly dataset: which SaaS brands ChatGPT, Perplexity and Gemini actually name dabyte.ai

Share of answer for 20 SaaS and AI tools, measured weekly on a fixed panel of 16 category buyer prompts across three engines, and published free under CC BY 4.0 — JSON, CSV and an MCP endpoint, no key and no sign-up. The panel is frozen between releases and any change bumps a version, so deltas are never computed across a change of denominator; every past release stays at a permanent URL, so any figure can be recomputed by a third party. Resolution is disclosed too: one mention on one engine is a whole scale step, and movements within a step are not reported as changes. A crypto index runs the same method at dablock.ai. Disclosure: I publish it, and placement cannot be bought — every record carries an is_client flag so that claim is checkable.