Mio
YC W16Austin, US · Founded 2015 · 12 employees · 18 known investors
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Mio provides interoperability across collaboration platforms, enabling users to send messages, manage identities, share files, and initiate meetings across different systems.
Also known as Message.io (fka Prompt App, Inc.) · Message.io, Inc. · Message.io · Prompt · Prompt, Message.io
Founders & leadership· Y Combinator alumni (W16)
Mio was founded in 2015 by Tom Hadfield and James Cundle.


Investors · 18
How we know: Cisco Investments's portfolio page · techcrunch.com · Y Combinator's founder network · Not right? Tell us
How we know: Eniac Ventures's portfolio page · techcrunch.com · the VCSheet dataset · Y Combinator's founder network · Not right? Tell us
How we know: Newtown Partners's portfolio page · Not right? Tell us
How we know: the Y Combinator directory · techcrunch.com · Not right? Tell us
How we know: techcrunch.com · Not right? Tell us
How we know: Y Combinator's founder network · Not right? Tell us
How we know: techcrunch.com · Y Combinator's founder network · Not right? Tell us
How we know: techcrunch.com · Y Combinator's founder network · Not right? Tell us
How we know: Y Combinator's founder network · Not right? Tell us
How we know: techcrunch.com · Not right? Tell us
How we know: Y Combinator's founder network · Not right? Tell us
How we know: techcrunch.com · Y Combinator's founder network · Not right? Tell us
How we know: techcrunch.com · Not right? Tell us
How we know: pulse2.com · Y Combinator's founder network · Not right? Tell us
Also in the syndicate · 1
Funding
SEC filings, press & company announcements$8.7M disclosed across 1 of 3 rounds · 2021–2026
- Undisclosed amountSeries AJan 2022
Jungle Ventures (lead), GGV, Hustle Fund, iSEED SEA, Patamar Capital, Venturra
Source ↗ - $8.7MSeries ADec 2021 · 2 sources
Cisco Investments (lead), Zoom Video Communications (lead), Capital Factory, Eniac Ventures, Goldcrest Capital, Khosla Ventures, Two Sigma Ventures, Y Combinator
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Founder mafia
2 people who came through Mio went on to found or lead other companies.
Related companies · 10
Companies working in the same space as Mio.
Legal entities · 2
corporate structureIn the news
Frequently asked questions
- What does Mio do?
- Mio provides interoperability across collaboration platforms, enabling users to send messages, manage identities, share files, and initiate meetings across different systems.
- Who founded Mio?
- Mio was founded by Tom Hadfield, James Cundle in 2015.
- Who are Mio's investors?
- Mio's investors include Cisco Investments, Eniac Ventures, Newtown Partners, Y Combinator, Capital Factory, Four Cities, Goldcrest Capital, Granite Asia and 9 more.
- How much funding has Mio raised?
- Mio has disclosed $8.7M raised across 1 of its 3 known rounds.
- Where is Mio headquartered?
- Mio is headquartered in Austin, US.




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