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RetroFill vs Isothrum

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 Isothrum
DetailRetroFill logo RetroFillIsothrum logo Isothrum
What it doesFill your GitHub contribution graph with real, backdated commits A GNS3-style editor for containers, VMs, switches and routers that runs in your browser
StageNot given Not given
FoundedNot given 2022
Based inCA FR
Pricing modelFreemium Free
PricingFree: 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. Not given
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
  • Visual lab editor with drag-and-drop interface for network devices
  • Mix containers and VMs in the same lab
  • Configure switches with VLANs and trunks
  • Automatic or manual routing between networks
  • Add network conditions like latency, jitter and packet loss
  • Export to Docker Compose, Vagrant, Proxmox, Kubernetes and cloud platforms
  • Import GNS3 projects and convert them to labs
  • Real-time validation as you design
  • Desktop app with consoles, VNC screens and packet capture
  • Works offline and runs entirely in the browser
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
  • Runs in your browser with no installation or account required
  • Exports to multiple environments from one lab design
  • Private by design with no data leaving your browser
  • Open isoloom.yml format that you own and can version control
  • Can import and convert existing GNS3 projects
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check2 no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)130
Referring domains (Majestic)10

5 details filled in for both companies.

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