diff --git a/src/local_transcriber/backends/onnx_asr.py b/src/local_transcriber/backends/onnx_asr.py
new file mode 100644
index 0000000..190c6f2
--- /dev/null
+++ b/src/local_transcriber/backends/onnx_asr.py
@@ -0,0 +1,27 @@
+"""Бэкенд транскрипции на основе onnx-asr (GigaAM, Parakeet, FastConformer)."""
+
+from __future__ import annotations
+
+MODEL_ALIASES: dict[str, str] = {
+    "gigaam-v3": "gigaam-v3-ctc",
+    "parakeet-v3": "nemo-parakeet-tdt-0.6b-v3",
+}
+
+SUPPORTED_ALIASES = ", ".join(MODEL_ALIASES)
+
+
+class OnnxAsrBackend:
+    """Бэкенд транскрипции через onnx-asr (ONNX Runtime)."""
+
+    def _resolve_model(self, model_name: str) -> str:
+        """Resolve alias to onnx-asr model name. Raw names pass through."""
+        if model_name in MODEL_ALIASES:
+            return MODEL_ALIASES[model_name]
+        if "/" in model_name or model_name.count("-") >= 2:
+            # Looks like a raw onnx-asr name — allow passthrough
+            return model_name
+        raise ValueError(
+            f"Неподдерживаемая модель '{model_name}'. "
+            f"Доступные алиасы: {SUPPORTED_ALIASES}. "
+            f"Либо укажите полное имя модели onnx-asr."
+        )
diff --git a/tests/test_onnx_asr.py b/tests/test_onnx_asr.py
new file mode 100644
index 0000000..4cceb3a
--- /dev/null
+++ b/tests/test_onnx_asr.py
@@ -0,0 +1,26 @@
+"""Tests for onnx-asr backend."""
+
+import pytest
+from local_transcriber.backends.onnx_asr import OnnxAsrBackend, MODEL_ALIASES
+
+
+class TestModelAliases:
+    def test_gigaam_v3_resolves(self):
+        backend = OnnxAsrBackend()
+        result = backend._resolve_model("gigaam-v3")
+        assert result == "gigaam-v3-ctc"
+
+    def test_parakeet_v3_resolves(self):
+        backend = OnnxAsrBackend()
+        result = backend._resolve_model("parakeet-v3")
+        assert result == "nemo-parakeet-tdt-0.6b-v3"
+
+    def test_raw_name_passes_through(self):
+        backend = OnnxAsrBackend()
+        result = backend._resolve_model("nemo-canary-1b-v2")
+        assert result == "nemo-canary-1b-v2"
+
+    def test_unknown_alias_raises(self):
+        backend = OnnxAsrBackend()
+        with pytest.raises(ValueError, match="Неподдерживаемая модель"):
+            backend._resolve_model("nonexistent-model")