---
title: 21tunnel Reviews
meta_title: '21tunnel Reviews 2026: Details, Pricing, & Features | G2'
meta_description: Filter reviews by the users' company size, role or industry to find
  out how 21tunnel works for a business like yours.
date_modified: '2026-08-13'
parent_category:
  name: Network Security
  url: https://www.g2.com/categories/network-security
---


# 21tunnel Reviews
**Vendor:** 21tunnel  
**Category:** [Software-Defined Perimeter (SDP) Software](https://www.g2.com/categories/software-defined-perimeter-sdp)
## About 21tunnel
21tunnel is an open-source tunneling service built for AI coding agents. It gives assistants like Claude Code, Cursor, and Devin scoped, short-lived credentials to open secure public URLs to localhost, with one-click cascade revoke — instead of handing the agent a full-access API token. It also works as a complete ngrok alternative: HTTP, TCP, SSH and gRPC tunnels from a single Rust binary, sticky subdomains, custom domains on the free tier, edge auth via Google sign-in, a live request inspector, and teams with RBAC and audit logs. The full stack self-hosts under MIT and Apache-2.0.






- [View 21tunnel pricing details and edition comparison](https://www.g2.com/products/21tunnel/reviews?section=pricing&secure%5Bexpires_at%5D=2026-08-25+21%3A32%3A43+-0500&secure%5Bsession_id%5D=c6dd5a5d-6b15-4a7e-8b4f-2039022dcdf4&secure%5Btoken%5D=3776a0f4bbd6667142cc60806b2b7fce1c3057e5fc77b7fb9208df680fdeb883&format=llm_user)

## 21tunnel Features
**Additional Functionality**
- Penetration Testing
- Alerts/Notifications
- Audit Trail
- Anti Virus
- Vulnerability Scanning
- Remote Monitoring & Management
- VPN
- Behavior Analytics
- Reporting/Analytics
- Real-Time Notifications
- Access Controls/Permissions
- SSL Security
- Patch Management
- Event Logs
- Anomaly/Malware Detection
- DNS Leak Protection
- Third-Party Integrations
- Server Monitoring
- Real-Time Monitoring
- Compliance Management
- Network Provisioning
- API
- Email Alerts
- Security Auditing
- Intrusion Detection System
- Data Visualization
- Two-Factor Authentication
- Generative AI
- Firewalls
- AI Copilot
- Anti Spam
- Threat Response
- Activity Monitoring
- Risk Alerts
- Data Loss Prevention
- Single Sign On
- Intrusion Prevention System
- Secure Login
- Policy Management
- Activity Dashboard

**Administration**
- Network Segmentation
- Scalability
- Global Access

**Protection**
- Policy Enforcement
- Security Audit
- Access Control
- User Authentication

**Monitoring**
- Compliance Monitoring
- Vulnerability Monitoring
- Configuration Monitoring
- Observability

## Top 21tunnel Alternatives
  - [Zscaler Internet Access](https://www.g2.com/products/zscaler-internet-access/reviews) - 4.4/5.0 (295 reviews)
  - [Check Point SASE](https://www.g2.com/products/check-point-sase/reviews) - 4.5/5.0 (225 reviews)
  - [Absolute Secure Access](https://www.g2.com/products/absolute-secure-access/reviews) - 4.7/5.0 (224 reviews)