One-Page Brief

Verdict

As described, "DOT compliance for small carriers" (DQ files, Clearinghouse and MVR reminders, DVIRs and maintenance for 1–20 truck fleets) reaches $10k MRR by month 24 about 3% of the time. The segment churns out of existence, and the category is already crowded at $15–49 a month. Narrowed, the idea changes. For private trade fleets (landscaping first, then HVAC, plumbing and electrical) with 3–25 DOT-regulated vehicles and mostly non-CDL drivers, with owner access and ~15 hrs/week, the odds are $1k ~45%, $5k ~18%, $10k ~8% and $20k ~3%. Full-time, they are $1k ~60%, $5k ~30%, $10k ~16% and $20k ~7%. Tier B ($20k+ MRR, profitable, in 24 months) is ~2% at ~15 hrs/week and ~6% full-time. All are judgment estimates; there's no verified base rate for bootstrapped B2B micro-SaaS (01). It is not fundable and doesn't need to be.

No as described. Go, small, as DOT paperwork for private trade fleets, with a day-45 kill test.

The five things that matter

Whip Around proves mid-size fleets pay, not small ones. $10M from ~1,000 customers is ~$10k a customer a year, or roughly 80–170 vehicles each at its $5–10 per asset. The catalog's evidence doesn't reach 1–20 truck fleets (10).
Small trucking carriers disappear. From FMCSA's census, only 27% of 2021's new small for-hire registrations and 40% of 2023's are still active. Private fleets do better (43% and 52%). Selling to new trucking authorities means replacing your customers every few years (10).
The trucker DQ-file niche is full. Core Compliance charges $15 a month for 5 drivers. FleetCollect runs free to $19. DOTDriverFiles, FleetDrive 360, CDL Suite and FileFlo all publish prices. Motive and Samsara bundle DQ files. J.J. Keller, Foley and Tenstreet serve the top.
Trade fleets are a different buyer with a different rulebook. A landscaper's pickup and trailer over 10,001 lb makes it a regulated carrier. It owes DQ files, medical cards, road tests and annual MVR reviews, but not drug testing or the Clearinghouse, which only apply to CDL drivers. There are ~20,700 interstate private fleets with 3–25 units and zero CDL drivers, and ~60,900 with any mix. Trucking tools lead with the wrong features for them.
The pain is invisible until it isn't. Owners often don't know the rules apply. Recordkeeping fines run to $1,584 a day (max $15,846), and using a driver without a valid medical card is an automatic failure in the new entrant audit. But nothing hurts until an audit, a roadside inspection or a crash. This is a vitamin that turns into a painkiller on one bad day, and the product has to sell before that day.

Feature sort (headline)

Table stakes: document storage, expiry reminders, DVIRs, driver list.
Differentiators:
- the "does DOT apply to me?" checker for trade owners;
- driver self-service by text message (licence and medical card photos, e-signed application);
- the § 391.25 annual review signed on a phone;
- a catch-up that finds every gap in the first 30 days;
- a one-click audit binder with a retention log;
- maintenance due dates in the same place.
Distractions: ELD and hours of service, GPS, dashcams, IFTA, UCR and permit filing, native apps.
Liabilities: "DOT compliant" or "audit-proof" claims, unreviewed rule answers, running a drug-testing program, holding raw MVR data outside a licensed vendor.

Most likely cause of death

Owners don't feel it. The founder builds a clean product, and landscapers say "we're not a trucking company" and don't pay. Early warning: at day 45, fewer than 5 paying firms full-time, or 3 at ~15 hrs/week (05).

Next 90 days

Do: sign a paid DOT compliance advisor. Pull 300 landscaping fleets from the FMCSA census and talk to 25 owners. Sign 5 firms at ≥$49/month for a hands-on "we build and keep your DQ files" service. Then build the thin v1: driver text link, expiry engine, annual review, audit binder. Reach 15 firms (full-time) or 8 firms (~15 hrs/week) by day 90 (08). Oct–Dec is the landscapers' quiet season, so pitch "be ready before spring hiring". Stop: thinking of this as trucking software.