Best Debugging Products in 2025

Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.

Key Proxyman.io features:

User-Friendly Interface Cross-Platform Support Real-time Traffic Interception HTTPS Decryption

Open Source $49.0 / Annually

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Key Flagsmith features:

Feature Flags Remote Config A/B/X Testing & Optimization Organization Management

Try for free Open Source freemium

From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

Key Sentry.io features:

Real-time error tracking Detailed error reports Integrations Releases and version tracking

Intelligent Execution That Tests Like a Real User Run functional and visual tests with no scripts, and catch issues before they reach production.

Key Quash Automate features:

In-Workflow Testing AI Test Generation Evolving QA

freemium $500.0 / Monthly

Fiddler is a debugging program for websites.

Key Fiddler features:

Comprehensive Debugging Cross-Platform Compatibility Custom Scripting User-Friendly Interface

HTTP proxy / HTTP monitor / Reverse Proxy.

Key Charles Proxy features:

Comprehensive HTTP/HTTPS Debugging User-Friendly Interface Support for Various Platforms Throttling Feature

Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.

Key HTTP Toolkit features:

Ease of Use Cross-Platform Compatibility Open Source Comprehensive Debugging Features

Open Source freemium €7.0 / Monthly (for a Pro subscription)

Perform Web Testing on 2000+ Browsers & OS.

Key LambdaTest features:

Selenium Grid For Mobile Web-Automation Testing Selenium Web Testing Automation Parallel Testing For Goto Market Launch API for Continuous Testing

Open Source freemium $15.0 / Monthly

A simple, beautiful Webhook debugging tool.

Key HTTPDump features:

Ease of Use Quick Setup Public URL Creation Real-Time Monitoring

BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality. .

Key BrowserStack features:

Cloud-based Browser Extensions SaaS

Open Source freemium $29.0 / Monthly (Starts at single user plans and billed annually)

The only web debugging proxy that runs in the cloud.

Key Cloud Middleman features:

Easy Integration Cost Efficiency Increased Security Scalability

Eliminate your coding blind spots. Byteboost is a plug-and-play tool that simplifies everything from debugging to optimization, securing a smooth user experience.

Full stack session recordings that capture the entire stack, with all data correlated, enriched, and AI-ready. You have all the context you need to fix bugs, build features, and supercharge your AI tools.

Key Multiplayer.app features:

Full stack session recordings Full stack session recordings notes MCP server Notebooks

freemium $20.0 / Monthly (Pro plan, priced annually per user)

AI code reviews. Review your PR in minutes, not days. .

Key Trag features:

Efficient Time Management User-Friendly Interface Integration Capabilities Cross-Platform Access

freemium $20.0 / Monthly