# Mainframe Industries

> Helsinki-based studio building cloud-native MMO games playable across devices.

## Why it is interesting

Mainframe is one of the first studios explicitly designing for cloud-gaming MMOs — a16z led Series A and B as Riot Games and Twitch alumni joined the cap table.

## Profile

- **Stage:** other
- **Status:** private
- **Industries:** gaming
- **Coverage:** full
- **Last updated:** 2026-07-24

## Key facts

- Series B (Nov 2021): ~$23M led by a16z; Riot Games, Play Ventures returned (GamesIndustry.biz)
- Series A (2020): ~$8.3M led by a16z (a16z announcement)
- Co-investors: no additional institutional investors disclosed in public sources reviewed 2026-07-24

## Investors in our directory

- https://venturecapitaltracker.com/fund/andreessen-horowitz

## Related articles

- https://venturecapitaltracker.com/2026-a16z-hot-portfolio-companies

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Source: https://venturecapitaltracker.com/startup/mainframe-industries