How many employees work at Input Output?

Input Output, Inc. has 516 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 0.1%.

Data source: Revelio Labs Coverage: Global workforce Latest update: December 2025

About Input Output

Founded in 2015, IOHK is one of the world’s pre-eminent blockchain research and engineering companies, best known for the Cardano blockchain platform We are a fully decentralized, remote-working organization committed to the highest principles of academic rigour and evidence-based software development. The company builds high-assurance blockchain products for public and private sector clients. Our goal is simple – to fuel our drive to be best in class by giving you the opportunity, resources and support to deliver your finest work to date. You’ll work with some exceptionally talented and friendly individuals who are always open to new ideas and ways of working. IOHK is an advocate of decentralized remote working, with over 300 people working in more than 50 countries. Everyone has a different skill set, a different culture, and is at a different stage in their life. We aim to make collaboration between diverse people fun, exciting, and always rewarding. Many companies say they ‘think outside the box’ – for IOHK it’s more, ‘we think outside the geography’.

As of December 2025

Input Output
workforce metrics

Headcount

516

Avg. Salary

$104.6k

Tenure

2.4yr

Growth Rate

0.1%

Hiring Rate

Attrition Rate

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Employee Headcount

Interactive chart of Input Output annual worldwide employee count from 2023 to 2025.

  • Input Output total number of employees in 2025 was 515, a 0.1% increase from 2024.
  • Input Output total number of employees in 2024 was 514, a 0.3% decline from 2023.
  • Input Output total number of employees in 2023 was 516, a 11.6% decline from 2022.

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Employee Geographic Breakdown

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Employee Role Breakdown

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Employee Compensation

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Active Job Postings

Interactive chart of Input Output annual active job postings from 2023 to 2025.

  • Input Output active job postings in 2025 was 51, a 48.8% increase from 2024.
  • Input Output active job postings in 2024 was 31, a 36.8% decline from 2023.
  • Input Output active job postings in 2023 was 45, a 127.3% increase from 2022.

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Employee Sentiment

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