Header Override vs Kaption AI

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Header Override compared with Kaption AI
Detail	Header Override	Kaption AI
What it does	Open-source browser extension to modify HTTP request and response headers and cookies	WhatsApp voice messages to text with AI
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Open source	Freemium
Pricing	Not given	Free: no credit card required. Basic: US$5.99/month (US$4.99/month quarterly, US$3.99/month annually). Pro: US$9.99/month (US$7.99/month quarterly, US$5.99/month annually). Also available in Brazilian Real: Basic from R$29.99/month, Pro from R$49.99/month.
Key features	Modify request and response headers with a focused editor interface Scope rules to specific URLs using browser-supported filter patterns Customize response cookies with Domain, Path, SameSite, Lifetime, Max-Age, and Secure attributes Create up to five local rule profiles for different projects and test setups Import and export profiles as local JSON files between browsers Enable, disable, delete, and annotate rules with comments Support for Chrome, Edge, and Firefox All rules stored locally in browser with no server transmission	Voice message transcription with automatic text conversion Chat summarization with AI Live translation in 36 languages WhatsApp call recording with transcripts Integration with Claude and ChatGPT via MCP Kanban board for chat organization Scheduled messages and reminders Contact export and group member download Privacy mode and screen lock Support for multiple WhatsApp accounts on desktop
What makes it different	Open-source with MIT License and full transparency Rules stored entirely locally with no analytics, tracking, or external servers Lightweight alternative to ModHeader URL scoping prevents rules from affecting unintended websites Simple interface requires no coding knowledge	Transcription runs locally on your device; audio only temporarily sent to servers for processing 4.8-star rating with over 5,000 reviews in Chrome Web Store Used by over 50,000 active users Works with multiple platforms: Chrome, Edge, Mac, Windows, iPhone, Android
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	8 no change since last check	19 no change since last check
Trust Flow (Majestic)	3	6
Citation Flow (Majestic)	18	30
Referring domains (Majestic)	13	181

4 details filled in for both companies.

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