United States · 
Who invested in Mainstay?
Mainstay's investors include Alumni Ventures, Khosla Ventures, FJ Labs, Right Side Capital Management and Salesforce Ventures, and 4 more on record.
2023202420252026
?Venture$18MVenture
United States · Venture startup
Who invested in Mainstay
Funding summaryUpdated 26 Oct 2026
$18Mraised across 2 rounds since 2022, from 2 sources
- Latest round
- Venture, $18MSept 2026
- Investors
- 9
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Venture Sept 2022
- Biggest round
- $18M Venture · Sept 2026
- Between rounds
- 4 years from the last two
The rounds
- Sept 2026
- Sept 2022VentureAmount undisclosed5 new
Source recorded
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.
Quick answers about Mainstay
How much has Mainstay raised?
Mainstay has raised $18M across 2 rounds since 2022. One round did not disclose an amount, so the total is a floor.
When did Mainstay last raise?
Mainstay's most recent round was a Venture of $18M in Sept 2026.
What was Mainstay's biggest round?
Its most recent round, $18M in Sept 2026, is also its largest on record.
Who backed Mainstay first?
Mainstay's first round on record, in Sept 2022, was backed by Alumni Ventures, Right Side Capital Management and Salesforce Ventures and 2 others.
What stage is Mainstay at?
Mainstay's latest named round is a Venture, in Sept 2026.
Where is Mainstay based?
Mainstay is based in the United States.
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