What are alternatives to KeyHalve?

In Security, by use: Lumo by Proton, Brave, Firefox, SentinelOne Purple AI, Varonis, Scamwise.

KeyHalve

Sets security response headers, including frame-ancestors, CSP and HSTS, on a document verification page served from CloudFront.

SecuritySecurity

keyhalve.com ↗

Open keyhalve.comAlternatives Set it up for my team Is KeyHalve yours? Claim the card →

At a glanceswept Oct 23, 2026

not read yet

Use

Used for: enforce security headers at the CloudFront edge
block framing and inline scripts on verifier pages
keep HSTS headers from being dropped by meta tags

Worth knowingcomputed from what we read · each with its source

Has an MCP server (1 in the registry)public registry →

How a program reaches itfound, not claimed · read Oct 24, 2026

MCP servercom.keyhalve/verifyverified in the MCP registry
Stateanswers, 3 toolschecked 2026-10-24
Address to connectmcp.keyhalve.com/mcp

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Securityby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

#1
Lumo by Proton
Provides encrypted email, calendar, cloud storage, password manager and VPN under one Proton account, with the Lumo chat assistant as an add-on.
3.4M
Active
Free plan
2014
#2
Brave
Browser that blocks ads and trackers, encrypts connections with built-in VPN, and includes private search.
1.4M
Active
From $3/mo
2015
#3
Firefox
Blocks trackers by default in a web browser and moves bookmarks, passwords and history between devices.
1.2M
Active
2002
#4
SentinelOne Purple AI
Detects and responds to endpoint threats using behavioral AI and autonomous remediation across devices and identities.
453k
From $179.99/user/yr
2013
#5
Varonis
Discovers, classifies, and monitors sensitive data; detects and prevents data exfiltration and identity-based attacks.
137k
Active
2005
#6
Scamwise
Analyzes suspicious messages, emails, links, and images to detect scam signals and provide verdicts.
130k
Active
Free

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Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

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Questions this page answers

What is KeyHalve?
Sets security response headers, including frame-ancestors, CSP and HSTS, on a document verification page served from CloudFront. It is listed in the Atlas under Security.
Do people use KeyHalve?
Little sign of use.
What are alternatives to KeyHalve?
In Security, by use: Lumo by Proton, Brave, Firefox, SentinelOne Purple AI, Varonis, Scamwise.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk