7 ranked servicesUpdated 0 paid placements in any rankingHow we rank
7 services have a ranked list for O'Fallon, MO. Each list ranks the IT firms that serve the city by IFR Score. The largest list by ranked IT firms is managed IT service providers, with 141.
Ranked by IFR Score among the IT firms that serve the city. Open a service for its full list.
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
141 ranked managed IT service providers serve O'Fallon.
5.0 from 791 Google reviews · 25 mi away
4.9 from 174 Google reviews · 27 mi away
4.9 from 78 Google reviews · 25 mi away
116 ranked IT consultants serve O'Fallon.
4.9 from 656 Google reviews · Based in O'Fallon
5.0 from 54 Google reviews · 5 mi away
5.0 from 13 Google reviews · 23 mi away
72 ranked cybersecurity companies serve O'Fallon.
4.8 from 32 Google reviews · Based in O'Fallon
4.9 from 58 Google reviews · 23 mi away
5.0 from 1,096 Google reviews · 19 mi away
59 ranked computer repair shops serve O'Fallon.
4.9 from 656 Google reviews · Based in O'Fallon
4.5 from 335 Google reviews · 5 mi away
5.0 from 36 Google reviews · Based in O'Fallon
52 ranked business phone system providers serve O'Fallon.
4.8 from 511 Google reviews · 41 mi away
5.0 from 95 Google reviews · 16 mi away
4.9 from 61 Google reviews · 9 mi away
52 ranked network cabling and installation companies serve O'Fallon.
5.0 from 286 Google reviews · 27 mi away
5.0 from 183 Google reviews · 7 mi away
3.7 from 9 Google reviews · 10 mi away
45 ranked data recovery services serve O'Fallon.
4.0 from 452 Google reviews · 24 mi away
5.0 from 61 Google reviews · 30 mi away
4.9 from 49 Google reviews · 25 mi away
Each service list scores every IT firm that serves O'Fallon on the same IFR Score, from 0 to 100.
Reputation, review volume, recency, availability, service focus, proximity, claimed profile, partnered and client reviews each carry a fixed weight.
Read the full methodO'Fallon IT services report 2026All Missouri cities
