| What it does | Stable domains for local development ports, eliminating conflicts with free open-source tunnels and paid cloud options
| Git-native platform for building, publishing, sharing, and securing APIs
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| Stage | Not given
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| Founded | Not given
| 2022
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| Based in | Not given
| US
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| Pricing model | Freemium
| Freemium
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| Pricing | 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
| Free: $0 (1 seat, 1 API repository, 1 published document with badge, 1 mock server, up to 1,000 mock calls/month). Team: $216/year (3 seats included, $72 per additional seat; unlimited repositories, documents, mock servers, 20,000 mock calls/month). Enterprise: $720/year (5 seats included, $144 per
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| Key features | - 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
| - Git-native repository for API specifications
- Visual OpenAPI editor with live linting
- API documentation generation and publishing
- API governance with predefined and custom rule sets
- Spec-based and code-based mock servers
- Team collaboration with organizations and permissions
- CLI for linting, bundling, and publishing
- MCP server and llms.txt for AI agent integration
- GitHub Actions integration without stored secrets
- Branch and tag protection with push mirrors and webhooks
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| What makes it different | - 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
| - Every API spec lives in a real Git repository with full version history, review workflow, and blame tracking instead of in a portal
- Open formats with no lock-in: OpenAPI and Markdown in Git, same checks run in CLI and CI
- Quality control through review: governance rule sets run in the editor and again in pull requests before reaching consumers
- CLI is free with MIT license, sends no telemetry, and works offline for linting, scoring and bundling
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ● no change since last check | 36 ● no change since last check |
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| Trust Flow (Majestic) | 4 | 11 |
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| Citation Flow (Majestic) | 26 | 20 |
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| Referring domains (Majestic) | 135 | 16 |
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Port Zero
APIGit