United States · Series B startup
2 rounds we have observed, with the 10 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.
Raised 5 months ago
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Funding summaryUpdated 5 Nov 2026
$100Mraised across 2 rounds since 2022, from 3 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
RA Capital ManagementLead
Y Combinator
Alumni Ventures
Founders Fund
Google Ventures
Abstract Ventures
Invus
Lumira VenturesReported by Ventureburn and 1 otherSEC filing: $56M sold
Contraline filed 2 raises, $63M in all. Filings say how much was sold and to how many investors; they never name the investors.
From Contraline's own website: 1 founder, 12 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.
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These 15 firms list Contraline as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Contraline's investors include Y Combinator, Alumni Ventures, Founders Fund, Abstract Ventures and RA Capital Management, and 5 more on record. RA Capital Management led its latest round.
Contraline has raised $100M across 2 rounds since 2022.
Contraline's most recent round was a Series B of $93M in Jun 2026, led by RA Capital Management.
Its most recent round, $93M in Jun 2026, is also its largest on record.
Contraline's first round on record, in Nov 2022, was backed by Y Combinator, Alumni Ventures and Founders Fund and 1 others.
Contraline's latest named round is a Series B, in Jun 2026.
Contraline is based in the United States.
RA Capital Management led the Series B in 2026.
In the same sector, and raised in the last eighteen months.
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United States · 
