# Mio

> Mio is an Austin, Texas company that makes enterprise chat platforms talk to each other. Instead of forcing a whole organization onto a single tool, Mio sits in the middle and federates the public APIs of Microsoft Teams, Slack, Google Chat, Zoom Team Chat and Cisco Webex so a message typed in one app lands natively in another. Founded in 2015 by Tom Hadfield and James Cundle and backed by Y Combinator, Khosla Ventures, Zoom and Cisco, Mio turns the messy reality of multi-platform companies (and the partners they work with) into a single, interoperable conversation.

- **Founded:** 2015
- **Headquarters:** Austin, Texas, United States
- **Founders:** Tom Hadfield (Co-founder & CEO), James Cundle (Co-founder & CTO)
- **Team size:** Roughly 20 employees at the time of the 2021 Series A; later third-party listings cite a larger headcount as the company scaled.
- **Products:** Chat Sync, Directory Sync, File Sync, External Chat Sync, Mio Hub
- **Notable:** Graduated Y Combinator (Winter 2016 batch)., Raised a combined ~$17M including an $8.7M Series A co-led by two competitors, Zoom and Cisco., Became an official interoperability partner of Google, Cisco and Zoom.

## Products & services

- **Chat Sync** — Real-time, native message interoperability between Microsoft Teams, Slack, Google Chat and Zoom Team Chat - messages appear natively in each platform rather than as forwarded copies.
- **Directory Sync** — Synchronizes user directories and identity across platforms so people can discover and message each other regardless of which app they live in.
- **File Sync** — Keeps shared files in sync across messaging platforms so attachments travel with the conversation.
- **External Chat Sync** — Connects an organization with external partners and customers on a different platform, enabling secure cross-company messaging without guest accounts.
- **Mio Hub** — Admin control center for setup, monitoring and management of interoperability across an organization's connected platforms.

## Achievements

- Graduated Y Combinator (Winter 2016 batch).
- Raised a combined ~$17M including an $8.7M Series A co-led by two competitors, Zoom and Cisco.
- Became an official interoperability partner of Google, Cisco and Zoom.
- Expanded from chat-only interoperability to identity, files, meetings and external/cross-company messaging.
- Adopted by large enterprises including Broadcom, Farmers Insurance and Kaplan.

## Latest updates

- **2021-12** — Raised $8.7M Series A led by Zoom and Cisco Investments to scale enterprise messaging interoperability.
- **2024-03** — Launched Google Chat interoperability with Microsoft Teams and Slack.
- **2024-07** — Partnered with 66degrees to bring cross-platform collaboration to Google Workspace customers.

## Links

- Website: https://www.m.io
- LinkedIn: https://www.linkedin.com/company/message-io
- Twitter/X: https://twitter.com/mio
- YouTube: https://www.youtube.com/@miomessaging
- Facebook: https://www.facebook.com/miomessaging

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Profile page: https://yespress.io/mio
Published by YesPress — https://yespress.io
Last updated: 2026-06-13