PayHook vs gpucheck

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

PayHook compared with gpucheck
Detail	PayHook	gpucheck
What it does	Payment webhook debugger for Stripe, Paddle, Lemon Squeezy, Polar and Dodo	Test a used NVIDIA GPU's health in one command
Stage	MVP	Startup
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Freemium
Pricing	Free plan: $0 forever with 1 project, signature checks for all five providers, 3 days of history with daily event limit. Pro plan: $12 per month with unlimited projects, plain-English diagnosis, fix prompts, and 30 days of history. Lifetime: $99 once, first 100 only, with everything in Pro for life	Health check: Free. Signed certificate: $29 USD per certificate.
Key features	Signature verification for Stripe, Paddle, Lemon Squeezy, Polar and Dodo Plain-English diagnosis of webhook failures Fix prompts for Cursor and Claude Code Replay events with re-signed payloads Works without localhost for cloud development environments View incoming events and HTTP status codes 30 days of event history in Pro plan	10-minute sustained stress test Plain-language problem explanations Cryptographically signed certificates with Ed25519 One-time server-issued challenge binding Public verification page for certificates Online revocation check Delete token for result removal Salted hash card identifier protection
What makes it different	Diagnosis explains what went wrong, not just what arrived Built for AI code editors and cloud development No code changes required during beta Covers five payment providers including ones Stripe CLI doesn't support Core is open source at launch	Open source under Apache-2.0 license with no account required Catches problems under sustained load that brief checks miss Server-side grading against healthy reference set prevents manipulation Privacy-preserving with salted hash identifiers and opt-in uploads Honest about limitations of certificate as proof
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	2	0
Citation Flow (Majestic)	16	0
Referring domains (Majestic)	2	0

5 details filled in for both companies.

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