Who invested in Buffer?
Buffer's investors include Bossa Invest, InterWest Partners, Collaborative Fund, Marc Bell Capital and AngelPad, and 21 more on record.

United States · Venture startup
Funding summaryUpdated 26 Oct 2026
$3.9Mraised across 4 rounds since 2011, from 4 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
BufferInformation technology & services1 / 13Their pitch deckBuffer's pitch deck, 13 slidesEach slide read for what it argues, against the decks that raised at the same stage.→From a historical funding recordSEC filing: $3.5M sold, first sale Dec 2014
Reported by blog.bufferapp.com
From Buffer's own website and the SEC filings it signed: 1 founder, 58 on the team.
And 40 more on the team.
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Buffer's investors include Bossa Invest, InterWest Partners, Collaborative Fund, Marc Bell Capital and AngelPad, and 21 more on record.
Buffer has raised $3.9M across 4 rounds since 2011. 2 rounds did not disclose an amount, so the total is a floor.
Buffer's most recent round was a Venture in Jul 2017.
Buffer's largest round on record is $3.5M (Series A), in Oct 2014.
Buffer's first round on record, in Oct 2011, was backed by AngelPad.
Buffer's latest named round is a Venture, in Jul 2017.
Buffer is based in the United States.
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