Start with the kind of clean you need
Cleaning companies sell three or four distinct visits, and a quote means little until you have named one. A deep clean is a one-time, top-to-bottom visit: baseboards, inside the microwave, behind and under what can be moved, grout and fixtures. A recurring clean is a shorter weekly, biweekly or monthly visit that keeps a home at the level a deep clean set. Move-in and move-out cleans are the empty-home version, usually against a landlord's or buyer's checklist. Post-construction cleanup is its own trade: fine dust in every cabinet and vent, and often a two-pass job.
Most companies on this directory advertise more than one of these, and each listing shows which ones its own website names. If a company only names recurring service, ask before booking a deep clean; if it only names deep cleaning, ask whether it will take you on as a regular.
Missouri has no licence to check, so ask about insurance and bonding
Missouri's Division of Professional Registration oversees 41 licensing boards, and none of them covers residential or janitorial cleaning. There is no state licence number to look up. That puts the weight on three things a company says about itself: general liability insurance (covers damage to your home), bonding (covers theft), and workers' compensation (covers a cleaner hurt in your home, so the claim does not land on you).
Missouri requires workers' compensation only once an employer has five or more employees, so a two- or three-person company is not breaking any rule by going without it. It is still worth asking, because the alternative is your homeowner's policy. A company that carries all three will usually say so plainly on its website; the listings here mark the ones that do.
Who is coming into the house
Ask whether the people cleaning are employees or subcontractors, whether they are background-checked, and whether you will see the same team each visit. None of these is required by Missouri law, and a company that does all three will say so. Listings here mark a company as background-checked only when its own website states a check in words; a general promise of trustworthy staff does not count.
Ask too whether they bring their own supplies and equipment, and whether they will use yours on request. The plant-derived label requires an explicit saved statement about plant-derived cleaning products; green or low-chemical wording alone does not qualify; if that matters to you, confirm which products on the first call.
The quote, the visit and the guarantee
Residential house cleaning is exempt from Missouri sales tax, so a quote should not carry tax on the service itself. Expect a quote to depend on bedrooms, bathrooms, square footage and the kind of visit; expect the first visit to cost more than a recurring one, because it is doing the catch-up work. Several companies let you price and book online; most still want a call or a walk-through for a first deep clean.
Ask what happens if something is missed. Companies that state a satisfaction or re-clean guarantee on their website are marked here. Ask about cancellation and rescheduling terms before the first visit, and get the arrival window in writing.
Where Missouri's cleaners are
Most of the state's reviewed cleaning companies are in and around St. Louis, Kansas City, Springfield and Columbia, with Independence, Lee's Summit, O'Fallon, St. Charles and Joplin behind them. Smaller towns are served by companies based in the nearest city; a town without enough companies for its own page here is folded into that city's page, and each listing's own address is shown.