NetLimiter vs Portmaster
Side-by-side comparison of features, pricing, ratings, and alternatives.
NetLimiter is a Windows utility for controlling and monitoring network traffic on a per-application basis, letting users set maximum upload/download speeds for individual apps, the whole system, specific users, or individual connections. It shows real-time traffic with live visualization and keeps long-term local statistics for historical analysis. Interactive rules can block selected applications from reaching the internet based on conditions like application path, domain, IP range or user account, and data quotas can automatically throttle or block traffic once a transfer limit is hit. It is sold under Locktime Software as a Pro edition with time-limited licenses covering one or two-year usage periods.
Portmaster, made by the Austria-based company Safing, is a free and open-source application firewall for Windows and Linux that gives users visibility into every network connection made by every application on their computer. Rather than just blocking traffic at the network edge, it lets users set per-application rules to allow, block, or restrict specific programs, and can completely isolate an app from the internet if desired. Beyond application-level control, Portmaster blocks ads and trackers system-wide at the DNS level, meaning the protection applies across all applications rather than just a browser. It supports restricting connections by country and blocking specific domains directly. Safing also offers SPN, a separate paid privacy network product, and a Pro tier for Portmaster itself, alongside the free core firewall application.
- Fine-grained per-application bandwidth control not found in most consumer tools
- Real-time and historical traffic statistics in one app
- Flexible rule and filter system for blocking or limiting specific traffic
- Long track record as a dedicated Windows bandwidth manager
- Free and open source with a transparent, publicly reviewable codebase
- System-wide DNS-level ad and tracker blocking, not limited to a single browser
- Granular per-application network control not found in most consumer firewalls
- Active development with recent updates and an engaged community
- Windows only, no Mac or Linux version
- Licensing is time-limited rather than a true perpetual purchase
- Interface and rule configuration have a learning curve for non-technical users
- No macOS support currently, only Windows and Linux
- More technical than typical consumer security software, aimed at privacy-focused users
- Optional Pro/SPN pricing (80 EUR/year) is not prominently broken down on the main site
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The Verdict
AI-generated from listing dataPortmaster is a free, open‑source firewall focused on privacy and ad‑blocking for Windows/Linux, while NetLimiter is a paid Windows‑only tool that specializes in per‑application bandwidth throttling and detailed traffic stats.
Key differences
- •Platform support: Portmaster works on Windows and Linux; NetLimiter is Windows‑only.
- •Primary function: Portmaster blocks ads/tracking and isolates apps; NetLimiter limits upload/download speeds and tracks bandwidth usage.
- •Pricing model: Portmaster is freemium (free core, optional 80 EUR/yr add‑on); NetLimiter requires a paid subscription.
- •Ease of use: Portmaster is aimed at privacy‑focused users and may be more technical; NetLimiter has a learning curve for rule configuration but offers visual traffic graphs.
- •Open‑source vs closed: Portmaster’s code is publicly available; NetLimiter is proprietary.
Pricing & value
Portmaster’s core features are free and open‑source; NetLimiter requires a paid subscription.
Ease of use / learning curve
NetLimiter provides visual graphs and a GUI for bandwidth limits, while Portmaster is more technical and privacy‑focused.
Features & depth
Portmaster excels at ad/tracker blocking and app isolation; NetLimiter excels at bandwidth throttling and traffic analytics—different strengths.
Integrations & ecosystem
Portmaster is open‑source with community visibility; NetLimiter offers no API or third‑party integrations.
Support
NetLimiter lists documentation and email support; Portmaster provides only community‑driven support.
Security & privacy
Portmaster’s open‑source code and DNS‑level tracker blocking give higher transparency for privacy‑concerned users.
Scalability / enterprise fit
NetLimiter’s bandwidth quotas and throttling suit managed corporate networks; Portmaster targets individual desktop users.
Choose NetLimiter if…
Windows power users who must control or limit per‑app bandwidth and need detailed traffic statistics.
Choose Portmaster if…
Privacy‑focused Windows or Linux users needing ad/tracker blocking and per‑app isolation.
Common questions
Can I use the tool on macOS?
Portmaster: No macOS support. NetLimiter: Windows only, no macOS.
Is there a free version?
Portmaster offers a free core version; NetLimiter requires a paid subscription.
Which tool can limit upload/download speeds per application?
NetLimiter provides per‑application bandwidth throttling; Portmaster does not offer speed limiting.