Linkdex
1 known investors
Find your way into Linkdex
Sign up to see every warm intro you have to Linkdex
- Paths you didn't know you had: your email and LinkedIn already hold routes to the Linkdex team. We find them for you
- 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
- Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone
Days of research, done the moment you sign in, with every route ranked by how warm it is.
Linkdex provides an SEO platform for enterprise brands and their agencies to manage search engine optimization activity and content marketing. The platform serves in-house teams and large advertising and SEO agencies globally.
Founders & leadership
JS

John StrawFounder NED2009–2016John Straw has spent more than 30 years founding and scaling technology companies at the intersection of data, search, and AI, including ventures acquired by Microsoft. He has held senior roles including Chief Digital Officer at Thomas Cook and advisor to McKinsey, and now invests in and advises early-stage companies applying advanced technologies to business problems.
MR

Matt RobertsCo-founder and VP Product / Marketing2009–2014Matt Roberts is a two-time SaaS founder with a venture-backed exit who has spent eight years building operating systems and scaling operations across companies ranging from dozens to thousands of employees globally. He now works with leadership teams at Linkdex to design organizational infrastructure including goal-setting frameworks, operating rhythms, and decision-making systems.
Investors · 1
500 Globallisted by 500 GlobalPalo Alto · $150K
How we know: open dataset · 500 Global portfolio 2026-08 · Not right? Tell us
Companies House · registry record
View on Companies House ↗Has charges registeredInsolvency historyAccounts overdueConfirmation statement overdue
- Registered name
- LINKDEX LIMITED
- Company number
- 06569025
- Status
- Liquidation
- Company type
- Private limited company
- Incorporated
- 17 Apr 2008
- Registered office
- 90 Chancery Lane, London, WC2A 1EU
- Nature of business (SIC)
- 62012 — Business and domestic software development74909 — Other professional, scientific and technical activities n.e.c.
- Previous names
- H.L.Q. LIMITED (2008–2008)
- Accounts
- last made up to 31 Dec 2017 · next due 30 Sept 2019
- Confirmation statement
- last made up to 17 Apr 2019 · next due 1 May 2020
Current officers · 1
- Efrem Michael Ainsley — director, appointed 1 Aug 2017
Source: Companies House public register · retrieved 20 Sept 2026. Contains public sector information licensed under the Open Government Licence v3.0.
Frequently asked questions
- What does Linkdex do?
- Linkdex provides an SEO platform for enterprise brands and their agencies to manage search engine optimization activity and content marketing. The platform serves in-house teams and large advertising and SEO agencies globally.
- Who founded Linkdex?
- Linkdex was founded by John Straw, Matt Roberts.
- Who are Linkdex's investors?
- Linkdex's investors include 500 Global.
