Fullbay
👤 Jacob Findlay (CPA and former Director of Finance at PT-software maker WebPT; quit to spend a year in a diesel shop before writing code.)🌐 site
He quit finance, spent a year in a diesel shop, then built the software those shops now can't run without.
Will it work? · our read
Insider-built. A year on the shop floor bought domain credibility no survey can. The niche is finite and now PE-owned, but 99%+ retention means what protects Fullbay is stickiness, not size.
01How the money moves
A diesel shop ditches paper and moves work orders, PM and invoicing into Fullbay
→
Techs, parts, customer approvals and payments all run in one system
→
Shop pays $188+/mo per user; Fullbay also earns on integrated parts and payments
02The numbers
about $19M
ARR (2024, est.)
Latka est.
99%+
annual retention
co. 2019
$23M+
raised: Mainsail, JMI
FreightWaves
ARR is a third-party estimate; the hard facts are the 2019 Mainsail round, the 2024 JMI round and 99%+ retention. Latka
about $19M ARR (2024, est.); bootstrapped to about $5M before the 2019 Mainsail round
03Weight class — CENTStap an axis
Control Mid
Category leader with a credibility edge, but PE now owns it and rival shop systems (Mitchell 1, Karmak) exist.
04The key move
Year in the bay
Findlay left a finance-chief job at PT-software maker WebPT and spent a year working in a diesel repair shop — idle techs, paper invoices, PM on spreadsheets — then built the tool owners actually needed.
fact
The counter-intuitive move
Immersion is romantic but slow; plenty of vertical SaaS won on fast interviews, sales and iteration, not a year of unpaid shop labor.
our read
05Where the moat is
Why a diesel-shop tool is hard to rip out:
A year on the shop floor = domain credibility99%+ annual retentionRuns the whole shop — deep switching costCategory leader in heavy-duty repair
06How it diesweak confidence
If a bundled incumbent like Mitchell 1 or Karmak ships good-enough shop management for less, or PE owners push prices too hard, thin-margin diesel shops drift back to paper and spreadsheets. our read
Show evidence · counter
Evidence: 99%+ retention and full-workflow lock-in say embedded shops don't leave; a year of shop-floor credibility is hard for a generalist to copy.
Counter: 99%+ retention (company, 2019); Mainsail then JMI kept investing through 2024 — durable economics, not decline.
07Against rivals
In heavy-duty repair the real incumbent isn't rival software — it's paper, whiteboards and QuickBooks. our read
08Who uses it
Heavy-duty diesel truck shopsTrailer repair shopsFleet maintenance teamsFire & ambulance repairMobile diesel mechanics
★Would it work for you?
Which boring trade could you spend a month inside before you build for it?
The edge was a year on the shop floor, not code. Where could you earn that access? We don't score you — you answer.
🚀Use it as a launchpada prompt for your own AI
Copy → paste into your AI → then develop it freely in the conversation.
You are a sharp, honest startup strategist. Use the proven case below as a launchpad for MY idea — help me find my own angle, not copy it.
<my_profile>
Domain I know: [your domain]
My unfair advantage (access/audience): [your edge]
Interests: [your interests]
Resources & goal: [your resources] · [your goal]
</my_profile>
<case name="Fullbay" model="saas">
What it does: Fullbay sells cloud shop-management software to heavy-duty diesel truck and trailer repair shops and fleet maintenance teams, priced from about $188 per month per user.
Why it won (moat): The founder spent a year working inside a diesel repair shop before writing code, so the workflow fits reality; once a shop runs its whole operation on Fullbay, over 99% renew.
Weakest axis (CENTS): The market is finite — a bounded number of heavy-duty repair shops — and Fullbay is now PE-owned and raising prices, exposing thin-margin small shops to churn.
How it could die: Fullbay dies if a bundled incumbent like Mitchell 1 or Karmak ships good-enough shop management for less, or PE owners push prices too hard and thin-margin diesel shops drift back to paper.
</case>
<task>
Be a skeptical operator, not a cheerleader. No generic startup platitudes. If my angle is weak, say so plainly.
First, a reality check: markets like this mostly fail. State the honest base rate (how crowded/hard is this?) and the ONE specific thing that would have to be true for ME to be the exception — grounded in my profile above.
Then a compact table:
- Fit — does this pattern suit my edge, or fight my gap?
- Angle — my sharpest differentiation vs Fullbay (concrete, not "better UX")
- Distribution — exactly where my first 100 users come from (this is the hardest part — be specific, not "content marketing")
- Risk — its "how it dies" (above) in MY situation
Finish with one line: "The single thing to do next."
Use only the facts above; if data is thin, say so — never invent numbers.
Then stay with me and go deeper on whatever I ask — tech stack, rough cost & time, the smallest MVP to test, pricing, or timing.
</task>
✓ Copied — paste into your AI
👤Placeholders like [your domain] auto-fill from your profile — example values for now.Set up profile →
Sourcesupdated · daily
LatkaFullbay raises $23M, led by Mainsail (May 2019) — FreightWavesCompany history & founder story — FullbayPricing (from $188/mo per user) — FullbayARR growth case study — Mainsail Partners
Revenue is a GetLatka third-party estimate (about $19.4M ARR 2024; about $7.3M 2023), not founder-disclosed — flagged EST, verified false. Solid reported facts: bootstrapped roughly four years, a $23M growth round led by Mainsail Partners announced May 21, 2019 (FreightWaves), a July 2024 strategic investment from JMI Equity with Mainsail reinvesting, and a 99%+ retention rate the company stated in 2019. The "about $5M ARR before Mainsail" figure comes from interviews/reporting, not a filing. The founder's year working in a diesel repair shop is documented by Fullbay and FreightWaves. Co-founder David Hoover is credited alongside Jacob Findlay in some sources; the 2019 FreightWaves article names only Findlay. Year listed as 2015 (commercialization); development began earlier. We never score you.