We founded Philterd on a single principle: your most sensitive data should never leave your control. Since 2017, we have been building the world’s most transparent, self-hosted redaction engines to help enterprises secure their data pipelines without third-party risk.
Philterd began when we realized that modern privacy tools were becoming black boxes - proprietary APIs that required users to send sensitive data to the cloud just to redact it. We believed there was a better way. We built Phileas as an open-source library to ensure total transparency, eventually evolving it into the enterprise-grade Philter API used today by healthcare, legal, and financial companies.
Jeff is the founder of Philterd. Get to know him and connect with him at jeffzemerick.dev.
Data Sovereignty
We believe redaction software belongs in your cloud. Your data, your keys, your perimeter.
Open Source Integrity
Transparency is the only way to verify security. Our core engine is open for inspection and contribution.
Purpose-Built AI
We don't use generic LLMs for redaction. We build specialized, high-precision NLP models designed specifically for PII/PHI detection.
Our software is stronger because it’s open. With a global community of developers auditing our code and contributing improvements, Philterd stays ahead of emerging threats and new regulatory requirements. We are proud to maintain the Phileas project under the Apache 2.0 License.
Copyright 2026 Philterd, LLC. All Rights Reserved.
Philter, Phileas, Phirestream, and PhiSQL are registered trademarks of Philterd, LLC.
