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addition.com

.com ok HTTP/1.1 200 921 ms

First seen 2026-05-30 · Last seen 2026-05-30 · crawled 2026-06-14

US · 104.26.10.70 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

sector tech type blog

HTML metadata

Title
Addition - Venture Capital Firm Based in New York
Description
We invest in early & growth stage technology companies. We were founded with a mission to support visionaries in building impactful & enduring businesses.
Language
en-US
Generator
All in One SEO (AIOSEO) 4.9.8
Canonical
https://addition.com/
Feeds
active last post 17 days ago

Open Graph

url
https://addition.com/
title
Addition - Venture Capital Firm Based in New York
locale
en_US
site name
Addition - Venture Capital Firm Based in New York
description
We invest in early & growth stage technology companies. We were founded with a mission to support visionaries in building impactful & enduring businesses.

Contact

Technology

CDN
Cloudflare
CMS
WordPress
Analytics
  • Google Analytics
  • Google Tag Manager

Third-party hosts loaded (3)

  • d21y75miwcfqoq.cloudfront.net×1
  • www.google-analytics.com×1
  • www.googletagmanager.com×1

Registration

Registrar
GoDaddy.com, LLC
Created
1995-10-25
Expires
2028-10-24 855 days left
Updated
2023-05-20
Name servers
  • colette.ns.cloudflare.com
  • sullivan.ns.cloudflare.com

DNS records live

NS
  • colette.ns.cloudflare.com
  • sullivan.ns.cloudflare.com
MX
  • 0 addition-com.mail.protection.outlook.com
TXT
  • protonmail-verification=e85783595935cb39f6d60a99b908ea007ea843f0
Verified for
  • Anthropic
  • Microsoft 365

Email authentication strong

SPF
v=spf1 include:spf.protection.outlook.com include:emailus.freshservice.com ip4:149.72.231.47 -all
strict (-all)
DMARC
v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email; adkim=r; aspf=r;
policy: reject (enforced)
DKIM
  • google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCESNi2Osh6HXTm+8w82uRbzi54GLPiGbRwWPCjDE4lamNCAAXx6Ma6IKlFuSxEiY08H3/GwPRbrN5oYsFPge…
  • selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA90Xn1bt0R8+lN9YGnTchlh8yp4WBspddp+Hhel/NIXwj+xCv3GqpcXRPhXaSTdSLPcETXp4w98BGIC…
  • selector2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1rI1gvk2phHpDA+okRKq+ORc4WtYc1TmuSHMr61gyFA+XKsqUpwTfIwnTTNrWxayl2B3esq6miMnhI…
selectors probed

Certificate (current)

WE1
from 2026-06-14 to 2026-09-12
Expires in 82 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://addition.com/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Linked from (1)

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