Lassie's website preview

Well Run profileThe Chase Pack · #155 of 720

Position 155

Lassie

AI agents that run back-office billing and admin for independent dental and medical practices

Pace
4:05/kmRace4.5
Distance
Distance 10K.
Open ops roles
3
Sprint 3:30/km
Race 4:05/kmLassie
Tempo 4:40/km
Steady 5:20/km
Warm-up 6:00/kmSunlight AI
Cool-down 6:30/km
Lassie runs in the Race lane. Rivals on Well Run sit in their own pace lanes; further right = more momentum. Tap one to open its page.Also competes with: Fincura, OmniPractice, DayDream, eAssist Dental Solutions, Waystar
Revenue estimate
$10M+ annualized revenuecompany-stated (via lead investor a16z) · as of Jun 2026 a16z.com ↗
Total raised
$47Msee rounds ↓
Headcount
~42as of Oct 2026 linkedin.com ↗
Founded
2020
HQ
San Francisco, CA

Leadership

The problem

Practice owners lose 100+ hours a month posting insurance payments, reconciling deposits and chasing claims, and can't hire billers

What they do

AI agents that run back-office billing and admin for independent dental and medical practices

Traction $10M+ annualized revenue, 700+ practices in 49 states, profitable; growth mostly referrals

Hiring trend

Open roles
15
Ops roles
3
Headcount
~40

Headcount ~42, +35% YoY (LinkedIn est.); 15 open roles, 10 posted with the Jun 2026 raise

Hiring in

  • San Francisco
  • Toronto

Funding

Last round
$35M
Stage
Series A
Date
Jun 2026

Led by Andreessen Horowitz (a16z)

Distance

10K · edge: hard to leave

Sticky once wired into a practice's PMS, payer portals and bank (deployment and customer-ops hiring confirm lock-in), with real adoption (700+ practices, $10M+ revenue), but a small player in a crowded field of AI posting tools (Fincura, OmniPractice), full-cycle billers (DayDream, eAssist) and incumbents that could bundle it (Planet DDS, Waystar).

Sources: Sacra: Lassie product, competition and risks ↗ · a16z: Investing in Lassie (700+ practices, $10M+ annualized revenue, Jun 2026) ↗

Last checked Oct 26, 2026

News timeline

  1. Jul 2026Founders on a16z podcast: AI for America's small businesses a16z.com ↗
  2. Jun 2026Raises $35M Series A led by a16z; $47M total, 700+ practices in 49 states businesswire.com ↗
  3. Jun 2026a16z's Alex Rampell joins board; ex-Robinhood CFO Jason Warnick becomes advisor businesswire.com ↗

Funding historyTotal raised $47M

  1. Jun 2026Series A$35Mat ~$250M (reported, source with knowledge)Led by Andreessen Horowitz upstartsmedia.com ↗
  2. Seed / earlier rounds~$12M (implied: $47M total minus $35M Series A; not separately announced)Led by SV Angel, Homebrew, Go Global Ventures (backers; lead not disclosed) sacra.com ↗

Profile facts checked Oct 26, 2026. Every fact links to its public source.

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