XSDHub vs TestFlows Machine

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

XSDHub compared with TestFlows Machine
Detail	XSDHub	TestFlows Machine
What it does	XML validation and schema tools for developers	Run your programs deterministically. Record, replay, and branch your runs.
Stage	Not given	Not given
Founded	Not given	Not given
Based in	NL	Not given
Pricing model	Freemium	Freemium
Pricing	Free: unlimited individual XML checks, local validation, no account required. Pro: US$19/month (US$190/year), batch 25 files, 10 cloud projects, 10 schemas, 300 validations + 250 invoices/day. Team: US$49/month (US$490/year), batch 100 files, 50 shared projects, 100 schemas, 5 seats, 1,000 validatio	Free: €0 with ₡3 credits included each month (about 20 vCPU-hours). Starter: €10/month with ₡25 credits (about 166 vCPU-hours). Plus: €25/month with ₡65 credits (about 433 vCPU-hours). Pro: €50/month with ₡150 credits (about 1,000 vCPU-hours). Dedicated: contact sales. Usage credits: €1 a credit, pu
Key features	Free local XML syntax and formatting checks XSD 1.0 validation with local imports and includes Optional XSD 1.1 and ISO Schematron XPath 1.0 server validation Cloud schema projects with version control Batch validation up to 25 files (Pro) or 100 files (Team) API access with daily quotas Public HTTPS schema import and structural comparison EN 16931 and XRechnung invoice validation Multi-format invoice validation (Factur-X, KSeF, RO e-Factura, HR-CIUS)	Record runs with non-deterministic inputs pinned down Replay runs instruction-by-instruction Checkpoint and fork from any point Fault injection for disk, network, clock, containers and system calls Built-in debugger for machine programs Machine client and Python SDK Cloud storage for runs and disk images Multiple simultaneous sessions with configurable vCPUs Configurable session disk up to 256G
What makes it different	Browser-based validation runs locally without uploading documents by default Explicit server processing consent required for any upload Comprehensive e-invoice validation across six European formats Built with AI assistance and documented with primary references	Deterministic replay of program runs with identical outcomes Fork and branch from any point without losing original timeline Comprehensive fault injection testing built-in Pay-as-you-go usage credits with free plan available
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)	1 no change since last check	2 no change since last check
Trust Flow (Majestic)	0	4
Citation Flow (Majestic)	4	21
Referring domains (Majestic)	1	27

5 details filled in for both companies.

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