Fill your GitHub contribution graph with real, backdated commits
Stable domains for local development ports, eliminating conflicts with free open-source tunnels and paid cloud options
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 and Open Source: $0 (unlimited local tunnels, open source); Professional: $49/mo or $490/yr (unlimited cloud tunnels, visitor auth, feedback comments); Team: $149/mo or $1,490/yr (everything in Professional plus unlimited members, teams, shared subdomains, approvals, organization billing); Ente
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
Stable local domains (*.portzero.local) for processes and containers
Cloud tunnels (*.tunnel.portzero.cloud) with HTTPS for LAN and internet access
Support for multiple programming languages
Git worktree support with per-branch URLs
AI agent integration with MCP server
Visitor authentication and access control
Feedback comments on live tunnels
Team access policies and approvals
Audit log (Enterprise plan)
Organization billing with no per-seat charges
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
Eliminates port conflicts by assigning stable virtual domains instead of port numbers
Free and open source for local use; no additional cost for cloud features on paid plans
Flat pricing with no meters, overages, or per-seat charges
Agent-ready with native MCP server integration for AI coding agents
Works across multiple OS and languages with zero port bookkeeping required
RetroFill
Port Zero