ModHeader offers a browser extension to modify HTTP request and response headers. It helps speed up web development, save debugging time, and reduce production bugs. self-described as most popular.

ModHeader

Fiddler is an AI Observability platform that enables organizations to build trustworthy, transparent, and understandable AI solutions. The company is committed to responsible AI and offers products to build trustworthy AI free of bias.

Amit Paka

Krishna Gade

Fiddler

Charles is an HTTP proxy / HTTP monitor / Reverse Proxy application that enables developers to view HTTP and SSL/HTTPS traffic between their machine and the Internet, including requests, responses and HTTP headers.

Charles

Flagsmith provides an all-in-one feature flag tool for developing, implementing, and managing feature flags, allowing teams to roll out and manage features smoothly and securely.

Metric
Company Name	ModHeader	Fiddler	Charles	Flagsmith
Symbol
MSH ID	COM:MODHEADER	AI:FIDDLER	COM:CHARLESPROXY	COM:FLAGSMITH
Market	PRIVATE	PRIVATE	PRIVATE	PRIVATE
Sector	Technology	Technology	Technology	Technology
Industry	Software	Artificial Intelligence	Software Development Tools	Software
Country	US	US	US	US
Stage
Employee Count		74
Website	modheader.com	fiddler.ai	charlesproxy.com	flagsmith.com
LinkedIn		fiddler-ai
Founders

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COM:MODHEADER

ModHeader

Company Overview

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