| Stony Brook University Mathematics Department | New York |
| STOP Theft | Connecticut |
| Stoplight | Texas |
| StopSign | Washington |
| StopSign Internet Security | Washington |
| STOPWATCH | Arkansas |
| STOPzilla | Florida |
| Stor.ai | Texas |
| Storable | Texas |
| Storage Engine, Inc. | New Jersey |
| Storage House | Florida |
| Storage Networks Corporation | Massachusetts |
| StorageCraft Technology Corporation | Utah |
| Storbyte | District of Columbia |
| Stord, Inc. | |
| Store Chek Systems | Oregon |
| StoredTech | |
| Storefront E-Commerce | Kansas |
| Stores, Inc. | |
| Storis, Inc. | New Jersey |
| Storix Software | California |
| Storj Labs, Inc. | Georgia |
| Storm Brain | California |
| Storm Computer | Texas |
| Storm Ventures | California |
| Storm8 | California |
| Stormer Web Design & Hosting | North Carolina |
| StormForge | Massachusetts |
| Storming Robots | New Jersey |
| StormLoader.com | Arizona |
| StormSensor | Washington |
| Stormship | Massachusetts |
| StormSoft, Inc. | Texas |
| Stormwire.com | Ohio |
| Story Collaborative | |
| Story Partners | |
| Storyblocks | Virginia |
| StoryChief | Massachusetts |
| STORYD | Washington |
| StoryFit | Texas |
| Storyheap, Inc. | California |
| Storyist Software, LLC | California |
| StoryIt | |
| Storymix Media, Inc. | |
| StorySlab, Inc. | New York |
| StoryTech | California |
| Storytellit | |
| Storyware | |
| StoryXpress | Virginia |
| Stottler Henke | California |