diff --git a/trusted_execution_environments/README.md b/trusted_execution_environments/README.md
index 3570841..c6af212 100644
--- a/trusted_execution_environments/README.md
+++ b/trusted_execution_environments/README.md
@@ -31,10 +31,11 @@
 
 <br>
 
-##### cloud providers
+##### other providers
 
 * **[nitro enclaves at aws](https://aws.amazon.com/ec2/nitro/nitro-enclaves/)**
 * **[a few notes on aws nitro enclaves: attack surface, by p. platek](https://blog.trailofbits.com/2024/09/24/notes-on-aws-nitro-enclaves-attack-surface/)**
+* **[keystone enclave (open framework for architecting tee)](https://keystone-enclave.org/)**
 
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