Redfin builds automated content moderation into all of its consumer-facing AI chat tools — including Ask Redfin and Conversational Search — to block questions that would require answering in ways that could violate Fair Housing laws. Regardless of how a question is phrased, the system will not provide answers about neighborhood demographics, race, religion, or other legally protected characteristics.

The moderation layer is implemented partly through Sendbird's auto-moderation tools, which sit within the infrastructure supporting Ask Redfin's retrieval-augmented generation (RAG) architecture built on Amazon Bedrock and Amazon OpenSearch. Redfin's SVP of product described the safeguards as surviving extensive adversarial testing — "a lot of rigors" — before launch. In June 2023, OpenAI temporarily deactivated all real estate chatbot plugins, including Redfin's, after an Inman investigation raised Fair Housing concerns. Redfin submitted a 28-page report to OpenAI detailing the risks; the plugin was later restored with enhanced safeguards. Redfin also separately removed crime data from its platform in 2021 to prevent racial bias from entering its models.