FiddlerCore
6.2#20 in web debugging proxiesFrom $2,999 a yearAPILinuxmacOSWindows
VisitFiddlerCore vs NetworkSpy
NetworkSpy
8.5#2 in web debugging proxiesFrom $18 a yearFree planAndroidiOSAPILinux
VisitWhat both publish
| Fact | FiddlerCore | NetworkSpy |
|---|---|---|
| Integrations | The product page lists integration with Telerik Fiddler and Telerik TestStudio. | The site lists a native Model Context Protocol bridge for connecting traffic to AI agents and SSO/SAML integration on the Business plan. |
FiddlerCore plans
- Internal Applications Use$2,999 a year
- Commercial Applications UsePriced on request
NetworkSpy plans
- FreeFree
- Personal$18 a year
- Professional$29 a year
- Team Starter$49 a month
- Lifetime$99, paid once
- Business$149 a month
Pick FiddlerCore if…
FiddlerCore suits developers who need programmable traffic inspection and control inside .NET applications. It also fits testing or monitoring workflows involving API replacement, replay, mocking, and simulated network conditions.
Pick NetworkSpy if…
NetworkSpy suits developers who need to inspect, edit, replay, or mock network traffic across desktop and mobile devices. Its token analysis, custom viewers, and team plans may also suit people debugging AI streams or working with colleagues.