Lassie
7 known investors
Lassie provides software for doctors' offices to automate administrative tasks and office management. The company serves medical practices and is positioned in the healthcare technology sector.
AI & Machine LearningDigital HealthEnterprise SoftwareHealthtechSaaS
Founders & leadership
SP
Steijn PelleinFounder
Investors · 7
Andreessen Horowitz✓ verifiedMenlo Park · $500K – $50M
Balderton CapitalLondon · $5M – $50M
Night CapitalCapitolavia Kevin Carter · inferred
FELIX CAPITALreportedLondon · $1M – $20M
Passion CapitalreportedLondon
Stena Sessanreported
Also in the syndicate · 1
Inventure
Funding
SEC filings, press & company announcements- Undisclosed amountSeries AJun 2026 · 2 sources
Andreessen Horowitz (lead), Night Capital
Source ↗ - Undisclosed amountSeries CFeb 2026
Balderton Capital, Felix Capital, Inventure, Passion Capital, Stena Sessan
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Competitors · 4
by search overlap
Daydream20 shared keywordsDaydream provides full-service dental billing outsourcing, combining technology with human dental billing experts to handle insurance verification, claim submission, payment posting, and patient billing for dental practices.
Hellopearl14 shared keywordsPearl develops AI diagnostic support software for dental providers that analyzes x-rays and imaging to improve diagnosis accuracy, patient communication, and clinic operations. The platform serves dental practices globally and extends beyond diagnostic imaging to support clinic management and outcomes.
Sacra10 shared keywordsSacra provides research and data on private companies for investors, covering valuations, business models, and secondary-market trading. Its analyst coverage includes company-specific reports and financial models aimed at hedge funds, private-market investors, and secondary traders.
EliseAI10 shared keywordsEliseAI applies artificial intelligence to streamline operations in housing and healthcare, two industries historically resistant to technological transformation. The company serves apartments and healthcare providers seeking to optimize complex, labor-intensive workflows.
Companies competing with Lassie for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Frequently asked questions
- What does Lassie do?
- Lassie provides software for doctors' offices to automate administrative tasks and office management. The company serves medical practices and is positioned in the healthcare technology sector.
- Who founded Lassie?
- Lassie was founded by Steijn Pelle.
- Who are Lassie's investors?
- Lassie's investors include Andreessen Horowitz, Balderton Capital, Night Capital, FELIX CAPITAL, Passion Capital, Stena Sessan.