# Outbound.io funding: rounds and investors > Outbound.io has raised $2.1M across 5 rounds since 2013. Investors include Y Combinator, Bossa Invest and Initialized Capital. Every round with its source. Source: https://millionrounds.com/company/outbound-io (Millionrounds; every figure on the page links to its filing or article) United States · [Venture startup](https://millionrounds.com/companies) # Who invested in *Outbound.io* 5 rounds we have observed, with the 11 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. Enterprise Software Funding summary Updated 26 Oct 2026 **$2.1M** raised across 5 rounds since 2013, from 5 sources **$1.0M** Seed **$400K** Seed **$120K** Seed **$550K** Venture - **Latest round:** Venture Aug 2021 - **Biggest round:** $1.0M Seed · Dec 2013 - **Investors:** 11 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2015 2017 2019 2021 **$1.0M** Seed **$400K** Seed **$120K** Seed **$550K** Venture **?** Venture - **First round:** Seed, $1.0M - **Biggest round:** $1.0M - **Usual gap between rounds:** 10 months ## The rounds - **Aug 2021** Venture **Amount undisclosed** *2 new* *1 returning* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Bossa Invest](https://millionrounds.com/fund/bossa-invest) [Initialized Capital](https://millionrounds.com/fund/initialized-capital) Source recorded - **Aug 2015** Venture **$550K** No investor was named in the report. From a historical funding record - **Jan 2015** Seed **$120K** *1 returning* [Y Combinator](https://millionrounds.com/fund/y-combinator) From a historical funding record - **Oct 2014** Seed **$400K** *6 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Alexis Ohanian](https://millionrounds.com/fund/alexis-ohanian) [Garry Tan](https://millionrounds.com/fund/garry-tan) [Subtraction Capital](https://millionrounds.com/fund/subtraction-capital) [Lunch Van Fund](https://millionrounds.com/fund/lunch-van-fund) [Aaron Harris](https://millionrounds.com/fund/aaron-harris) From a historical funding record - **Dec 2013** Seed **$1.0M** *3 new* Doug Pepper Paul Willard Trevor Kienzle From a historical funding record ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Seed** 2013 **Seed** 2014 **Seed** 2015 **Venture** 2015 **Venture** 2021 [Y Combinator](https://millionrounds.com/fund/y-combinator) [Bossa Invest](https://millionrounds.com/fund/bossa-invest) [Initialized Capital](https://millionrounds.com/fund/initialized-capital) [Alexis Ohanian](https://millionrounds.com/fund/alexis-ohanian) [Garry Tan](https://millionrounds.com/fund/garry-tan) [Subtraction Capital](https://millionrounds.com/fund/subtraction-capital) [Lunch Van Fund](https://millionrounds.com/fund/lunch-van-fund) [Aaron Harris](https://millionrounds.com/fund/aaron-harris) Doug Pepper Paul Willard ## Everyone who backed them [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **3** rounds [Bossa Invest](https://millionrounds.com/fund/bossa-invest) VC firm **1** round [Initialized Capital](https://millionrounds.com/fund/initialized-capital) VC firm **1** round [Alexis Ohanian](https://millionrounds.com/fund/alexis-ohanian) Angel **1** round [Garry Tan](https://millionrounds.com/fund/garry-tan) Angel **1** round [Subtraction Capital](https://millionrounds.com/fund/subtraction-capital) VC firm **1** round [Lunch Van Fund](https://millionrounds.com/fund/lunch-van-fund) VC firm **1** round [Aaron Harris](https://millionrounds.com/fund/aaron-harris) Angel **1** round Doug Pepper no record of our own yet **1** round Paul Willard no record of our own yet **1** round Trevor Kienzle no record of our own yet **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=outbound-io). ## Quick answers about Outbound.io ### Who invested in Outbound.io? Outbound.io's investors include Y Combinator, Bossa Invest, Initialized Capital, Alexis Ohanian and Garry Tan, and 6 more on record. ### How much has Outbound.io raised? Outbound.io has raised $2.1M across 5 rounds since 2013. One round did not disclose an amount, so the total is a floor. ### When did Outbound.io last raise? Outbound.io's most recent round was a Venture in Aug 2021. ### What was Outbound.io's biggest round? Outbound.io's largest round on record is $1.0M (Seed), in Dec 2013. ### Who backed Outbound.io first? Outbound.io's first round on record, in Dec 2013, was backed by Doug Pepper, Paul Willard and Trevor Kienzle. ### What stage is Outbound.io at? Outbound.io's latest named round is a Venture, in Aug 2021. ### Where is Outbound.io based? Outbound.io is based in the United States. ## Companies like Outbound.io In the same sector, and raised in the last eighteen months. [**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**AuxoAI** $21M · Oct 2026](https://millionrounds.com/company/auxoai)[**Qualitate** $32M · Oct 2026](https://millionrounds.com/company/qualitate)[**RapidCanvas** $53M · Oct 2026](https://millionrounds.com/company/rapidcanvas)[**Labelbox** $224M · Oct 2026](https://millionrounds.com/company/labelbox)[**Albert** $57M · Oct 2026](https://millionrounds.com/company/albert) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app