I built the comparison I wished existed: based on public documentation, API references, pricing pages, and aggregated reviews from G2 and Gartner – not sales decks. I'm not a certified compliance officer, and this isn't legal or regulatory advice. What I bring is a developer's perspective: I read the actual API docs and SDK references, not just the feature lists, and I care about integration realities – SDK quality, webhook reliability, sandbox access – that procurement-focused reviews often skip.

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