diff --git a/pyproject.toml b/pyproject.toml
index cece7524c..55fb54cab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,6 +42,7 @@ dependencies = [
   "xxhash>=2.0.0",
   "jsonargparse>=4.47.0",
   "PyYAML>=6.0.2",  # we need to register our types with yaml, jsonargparse uses yaml for config files
+  "blake3>=1.0.0",
 ]
 
 [project.optional-dependencies]
diff --git a/src/borg/archiver/benchmark_cmd.py b/src/borg/archiver/benchmark_cmd.py
index 1eb6bdba9..e448bbef0 100644
--- a/src/borg/archiver/benchmark_cmd.py
+++ b/src/borg/archiver/benchmark_cmd.py
@@ -214,16 +214,20 @@ class BenchmarkMixIn:
                 print(f"{spec:<24} {format_file_size(size):<10} {dt:.3f}s")
 
         from ..crypto.low_level import hmac_sha256, blake2b_256
+        import blake3
 
         if not args.json:
             print("Cryptographic hashes / MACs ====================================")
         else:
             result["hashes"] = []
         size = 1000000000
-        for spec, func in [
+        hashes_tests = [
             ("hmac-sha256", lambda: hmac_sha256(key_256, random_10M)),
             ("blake2b-256", lambda: blake2b_256(key_256, random_10M)),
-        ]:
+            ("blake3", lambda: blake3.blake3(random_10M, key=key_256).digest()),
+            ("blake3-mt", lambda: blake3.blake3(random_10M, key=key_256, max_threads=blake3.blake3.AUTO).digest()),
+        ]
+        for spec, func in hashes_tests:
             dt = timeit(func, number=number_default)
             if args.json:
                 result["hashes"].append({"algo": spec, "size": size, "time": dt})