RetroFill 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.

RetroFill compared with TestFlows Machine
Detail	RetroFill	TestFlows Machine
What it does	Fill your GitHub contribution graph with real, backdated commits	Run your programs deterministically. Record, replay, and branch your runs.
Stage	Not given	Not given
Founded	Not given	Not given
Based in	CA	Not given
Pricing model	Freemium	Freemium
Pricing	Free: preview and first fill up to 7 days and 20 commits. Coffee: $5 USD one-time for one 365-day window. Time Machine: $12 USD one-time for every year since you joined. Autopilot: $3.99 USD per month or $29 USD per year for streak insurance with automatic commits on missed days.	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	Live preview on your real graph with no sign-in required Realism engine with six personas and seeded rerolls Manual painting with brushes 1–4 Gap-only mode to respect existing contributions Text and pixel art mode on Time Machine and Autopilot One-click undo that deletes the generated repository Private repository support on Time Machine and Autopilot Contribution Doctor preflight checks Autopilot streak insurance with configurable commit frequency Multi-repo spread up to three repositories on Time Machine and Autopilot	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	Real, inspectable commits with no hidden activity Realistic patterns based on developer behavior modeling Preview before payment on your real GitHub graph Complete undo in one click with automatic account restoration Timezone-aware commits with proper timestamp handling	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)	Not checked yet no change since last check	2 no change since last check
Trust Flow (Majestic)	0	4
Citation Flow (Majestic)	13	21
Referring domains (Majestic)	1	27

5 details filled in for both companies.

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