Coelius Capital
In short: Coelius Capital is a San Francisco venture firm that makes early-stage investments in technology startups, generally B2B or B2B2C companies, with average cheques of $200,000 to $1 million. Zach Coelius is its managing partner. It took part in the $9.7 million round for voice AI dating app Known in December 2025.
Key facts
| Type | Investor |
|---|---|
| Headquarters | San Francisco, United States |
| Website | coelius.vc |
| Fact | Coelius Capital says it generally invests in B2B or B2B2C companies, with average cheques of $200,000 to $1 million, in early-stage technology startups [Coelius Capital, 2026] |
| Funding | Coelius Capital participated in Known's $9.7 million round, led by Forerunner with NFX and Pear VC [Dating Industry Insights, December 2025] |
| Headquarters | Coelius Capital is based in San Francisco, California [CB Insights, 2026] |
| Role | Zach Coelius is the firm's managing partner [Caplight, 2026] |
About Coelius Capital
Coelius Capital is a venture capital firm that provides early-stage capital to technology startups. Its website says it generally invests in B2B or B2B2C companies, likes "weird ideas", and writes average cheques of $200,000 to $1 million. Founders are asked to send a deck, a summary or at least a paragraph. The firm is based in San Francisco, California, according to CB Insights, and Zach Coelius is listed as managing partner.
In the dating sector, Coelius Capital is one of the investors in Known, a San Francisco voice AI dating app that charges $30 per date. Dating Industry Insights reported in January 2026 that Known raised $9.7 million in a round led by Forerunner, with participation from NFX, Pear VC and Coelius Capital. The round was later reported by DII as roughly $10 million. Caplight lists Known as a December 2025 seed investment where Coelius Capital was a co-investor.
Outside dating, public data aggregators list investments by the firm in companies such as Metaview, JotPsych and NiaHealth. Sources disagree on when the firm was founded, with CB Insights giving 2015 and Caplight giving 2019, so no founding year is stated here.
Dating industry investments
- Known, Funding, 2025-12
Also mentioned in
Questions about Coelius Capital
What does Coelius Capital invest in?
Early-stage technology startups, generally B2B or B2B2C companies, with average cheques of $200,000 to $1 million, according to its website.
Which dating companies has Coelius Capital backed?
It was one of the investors in Known, the voice AI pay-per-date app, in a $9.7 million round reported by Dating Industry Insights.
Where is Coelius Capital based?
San Francisco, California, according to CB Insights.
What does Coelius Capital do?
Coelius Capital is a San Francisco venture firm that makes early-stage investments in technology startups, generally B2B or B2B2C companies, with average cheques of $200,000 to $1 million. Zach Coelius is its managing partner. It took part in the $9.7 million round for voice AI dating app Known in December 2025.