Threshold Ventures Research
Investment Thesis
Threshold is a small, founder-focused early-stage firm in Palo Alto. Its stated approach is to partner with founders building category-defining companies during moments of market transformation, and to back them before their breakthrough. The site says it invests in founders with deep expertise and unique insights, in markets undergoing transformation, and in enabling technology adoption. It describes itself as small by design, which it says lets it stay nimble, invest with conviction and act as an active board member rather than a passive check.
Origins and Fund History
The firm was founded by Emily Melton and Josh Stein, who have worked side by side for more than two decades. It began as the venture practice of DFJ Growth and was spun out as an independent firm, rebranded Threshold Ventures in 2019. Funds named in public sources include Threshold IV and Threshold Select, announced about four years ago, and Fund V, reported at $250 million closing in 2023. A Form D for Threshold Ventures V, L.P. is listed in a public startup funding database with a Palo Alto address.
Stage Focus
The about page says the firm primarily invests in Seed to Series B companies. Its recent investments run from seed AI labs to Series A and B rounds, and the long-tenured portfolio includes several companies that went public.
Check Size
Threshold does not publish check sizes or fund size on its site. No figure is given here; it would be inferred from round sizes only.
Lead Tendency
The firm leads rounds. It led Suger's $15M Series A in February 2025 and Brightline's Series A with Oak HC/FT, and Josh Stein led Box's Series A in 2006. It also takes board seats and describes itself as committed to active investing, helping founders through make-or-break decisions at every stage.
Recent Activity
- Suger raised a $15M Series A in February 2025 led by Threshold, with Craft Ventures, Intel Capital and Y Combinator.
- Sequen announced a $90M Series B in September 2026 led by Prysm Capital; Threshold is reported among the participants.
- The portfolio page lists 2026 investments in Bluefish, Core Automation, Enclave, Interia and Autopoiesis, and 2025 investments in Adaption, Attuned Intelligence, Daero, Laborup, Moonlake and M7 Health.
Portfolio Highlights
Exits and public companies include Box (NYSE: BOX, invested 2006), Doximity (NYSE: DOCS), Livongo (Nasdaq: LVGO, acquired by Teladoc), Redfin, Remitly, Twilio, Epocrates, Rippling (private), and the acquisitions Nervana (Intel), OODA Health (Cedar), Chef (Progress Software), BentoBox (Fiserv), Chartbeat, CrowdAI (Saab), Divvy Homes (Maymont Homes), Loftium (Flyhomes) and Lumity (Alera Group). Active companies include BetterUp, LaunchDarkly, Front, CircleCI, Databook, CloudZero, Freeform, Mendaera, Imbue and Sequen. The portfolio is concentrated in enterprise software, developer tools, digital health and AI.
Team
- Emily Melton, Managing Partner
- Josh Stein, Managing Partner
- Arpit Mittal, Partner
- Heidi Roizen, Partner
- Lisa Xu, Partner
- Andreas Stavropoulos, Partner (board)
- Jen Kodner, Talent Partner
- Johnna Lesch, CFO
Decision Process
A public profile says Melton and Stein share decision-making authority with equal voting power on the investment committee, so the decision process is a partnership. Founders on the site describe fast, personal involvement from the managing partners.
Founder Preferences
Founder testimonials stress deep personal involvement, humility, and experience at scale. The firm favors founder-led companies with unique insight into a transforming market, often technical or domain experts, such as the physician-founder style of Doximity and the operator founders of Brightline and Databook.
Geographic Focus
The firm is based in Palo Alto, California. Portfolio companies are mostly in the United States, with some international companies such as Balena, ODAIA and Numa, so geography is not a stated constraint.
Gaps
AUM, check size and warm-intro requirements are not stated on the site. The portfolio page text was partly truncated in the read, so the later alphabet was filled from image captions. Domains are left null for all portfolio companies.