# US bans DeepSeek AI tools in federal civilian agencies

> The Department of Homeland Security ordered all civilian agencies to remove DeepSeek products on Oct. 19, 2026, citing security threats.

Oossa · 2026-10-20 · https://oossa.com/en/us-bans-deepseek-ai-tools-in-federal-civilian-agencies

The Department of Homeland Security issued an order on Oct. 19, 2026 that requires every federal civilian agency to stop using any AI product from DeepSeek Ltd., a Chinese company. The order says the models could let the Chinese Communist Party access U.S. government systems. All existing DeepSeek software, including third‑party services that rely on the app, must be removed, and future purchases are prohibited.

## Why the ban matters

For federal workers, the rule means any internal tools that rely on DeepSeek – from chat assistants to coding helpers – will have to be replaced with alternatives that pass U.S. security reviews. The ban also signals to vendors that products linked to foreign AI firms may face similar restrictions in the future.

## The facts

- The DHS order was published on Oct. 19, 2026, in the Federal Register.
- The order invokes the 2018 Federal Acquisition Supply Chain Security Act.
- DeepSeek’s R1 model, released in 2025, had previously outperformed some U.S. models in tests.
- The Commerce Department banned DeepSeek from government devices in 2025, and the Navy issued a similar advisory the same year.
- New York State also prohibited DeepSeek on government networks in 2025.

## Why it matters

Federal employees will need to switch away from DeepSeek tools, which may disrupt workflows that relied on its free app. The move highlights growing scrutiny of foreign AI technology in U.S. government systems, but it is unclear how quickly alternatives will be adopted or what impact the ban will have on other sectors.

## Sources & references

1. [Trump administration orders ban on DeepSeek in federal agencies](https://siliconangle.com/2026/10/19/trump-administration-orders-ban-on-deepseek-in-federal-agencies/) – SiliconANGLE, 2026-10-20
2. [US orders federal agencies to remove China’s DeepSeek AI from their systems](https://techcrunch.com/2026/10/20/us-orders-federal-agencies-to-remove-chinas-deepseek-ai-from-their-systems/) – TechCrunch, 2026-10-20
3. [US bans Deepseek technology across federal civilian agencies](https://the-decoder.com/us-bans-deepseek-technology-across-federal-civilian-agencies/) – The Decoder, 2026-10-20
4. [U.S. bans DeepSeek from government agency systems amid AI rift with China](https://www.cnbc.com/2026/10/20/us-deepseek-federal-agency-ban.html) – CNBC, 2026-10-20
5. [Washington bans DeepSeek from government agencies](https://www.semafor.com/article/10/20/2026/washington-bans-deepseek-from-government-agencies) – Semafor, 2026-10-20

Last updated: 2026-10-20