You can turn off sending telemetry data to ChromaDB (now a venture backed startup) when using langchain.
from langchain.vectorstores import Chroma
client_settings = chromadb.config.Settings(
is_persistent=True,
persist_directory="mydir",
anonymized_telemetry=False,
)
return Chroma(
client_settings=client_settings,
embedding_function=my_embeddings,
)