United States · 
Who invested in test IO?
test IO's investors include IBB Ventures, Heilemann Ventures and Turn/River Capital.
2012201320142015
?Seed$5.0MSeries A
United States · Series A startup
Who invested in test IO
Funding summaryUpdated 26 Oct 2026
$5.0Mraised across 2 rounds since 2012, from 2 sources
- Latest round
- Series A, $5.0MNov 2015
- Investors
- 3
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Seed Mar 2012
- Biggest round
- $5.0M Series A · Nov 2015
- Between rounds
- 3.7 years from the last two
The rounds
- Nov 2015
- Mar 2012
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.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
This firm lists test IO as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Quick answers about test IO
How much has test IO raised?
test IO has raised $5.0M across 2 rounds since 2012. One round did not disclose an amount, so the total is a floor.
When did test IO last raise?
test IO's most recent round was a Series A of $5.0M in Nov 2015.
What was test IO's biggest round?
Its most recent round, $5.0M in Nov 2015, is also its largest on record.
Who backed test IO first?
test IO's first round on record, in Mar 2012, was backed by Heilemann Ventures.
What stage is test IO at?
test IO's latest named round is a Series A, in Nov 2015.
Where is test IO based?
test IO is based in the United States.
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