IT companies in California: what 4,086 listings show

California is home to 4,086 published IT service providers, measured as of October 5, 2026. This figure sits within a national total of roughly 40,000 published IT service providers spread across all 50 states, and California appears among the top five states by volume alongside Texas, Florida, New York, and Virginia.

Within California, the listings concentrate in a handful of major cities. Los Angeles leads with 304 providers, followed by San Francisco with 282, San Diego with 277, Irvine with 230, and San Jose with 168. Together these five cities account for a large share of the state's total, though providers are also recorded in smaller markets across California.

Size of operation, measured by headcount, shows a median of 9 employees among California providers. This matches the national median employee count of 9.0, indicating that the typical California IT service provider is similar in size to the typical provider nationwide. The figure points to a market dominated by small teams rather than large-scale operations, consistent with the broader national pattern.

Reputation data is available for a portion of the California listings. Of the 4,086 providers, 1,784 have a Google rating attached to their profile, which works out to 43.7% of the total. Among those with a rating, the median rating is 5.00. This median matches the national median rating of 5.00 recorded across providers with a Google rating, suggesting that the rating patterns seen in California are not distinct from the national trend.

Support availability is another dimension captured in the data. Among California providers, 2,783 have known support hours on record. Of those, 825 offer 24/7 support, which is 29.6% of the providers with known hours. This leaves the majority of providers with documented support hours operating on schedules other than round-the-clock availability. It is worth noting that support hours are not known for all 4,086 providers, so this percentage applies specifically to the subset where hours have been documented.

Placing California in the national context, the state's 4,086 providers represent a meaningful share of the roughly 40,000 total IT service providers recorded nationally. California's presence among the top five states, alongside Texas, Florida, New York, and Virginia, reflects its role as one of the larger hubs for IT services in the country. With all 50 states represented in the national dataset, California's volume stands out relative to many other states, even though this article does not include comparative figures for those other states beyond their inclusion in the top five list.

The city-level breakdown within California also highlights a pattern common in states with large, dispersed populations: provider counts are not evenly distributed, but instead cluster around a few major metro centers. Los Angeles, San Francisco, San Diego, Irvine, and San Jose collectively hold a substantial portion of the state's total 4,086 listings, while the remainder are spread across other California cities not detailed here.

Taken together, the data shows a California IT services landscape built primarily around small teams, with a median headcount of 9 matching the national figure, and a rating pattern that also mirrors national norms at a median of 5.00. Support hour reporting remains partial, covering 2,783 of the 4,086 total providers, and within that subset, 24/7 availability is offered by a minority of providers at 29.6%. These figures together describe a snapshot of how California's IT service provider market is structured as of this measurement date, without extending into territory not covered by the recorded figures.

Correction (October 5, 2026): an earlier version of this article gave the directory size as 40,184. That figure was a display floor, not a measured count. The directory held roughly 40,000 providers on this date.