DSA Compliance Made Simple with Open-Source Moderation

The EU Digital Services Act (DSA) came into full effect in 2024, and its impact is still reverberating through the tech industry. Any platform operating in the EU — regardless of where it's headquartered — must detect, report, and remove illegal content. Fines can reach 6% of global annual turnover.

For many platforms, the DSA creates a fundamental challenge: how do you prove to regulators that your moderation system works? The answer requires three things: an automated moderation pipeline, a complete audit trail, and the ability to generate transparency reports.

The DSA requirements, simplified

The DSA doesn't prescribe a specific technology. It requires outcomes:

• Notice and action (Art. 14): Users must be able to flag content. Platforms must act on notices.
• Transparency reporting (Art. 15): Platforms must publish reports on content moderation activities.
• Illegal content (Art. 16): Platforms must have systems to detect and remove illegal content.
• Complaint system (Art. 21): Users must be able to appeal moderation decisions.
• Risk assessment (Art. 23): Very large platforms must assess systemic risks.

Why open source matters for compliance

Here's a question that DSA compliance officers should be asking: if your moderation platform is a proprietary black box, how can you prove to a regulator what it does?

Proprietary platforms can claim to moderate content, but you can't inspect their logic. You can't verify that they handle content correctly. You can't audit their decision-making. You're trusting their claims — and that trust might not satisfy a regulator.

Open-source moderation solves this. Every line of code is auditable. Every decision can be traced. Your compliance team can verify exactly how content is moderated, what criteria are applied, and where the results go.

Building a DSA-compliant moderation pipeline

Here's what a DSA-compliant setup looks like with OpenModeration:

1. Content ingestion: Receive content via API, webhook, or social connectors. Every item gets a unique ID and is stored encrypted.
2. AI moderation: Route to the best provider. Results include scores per category and a flagged/not-flagged decision.
3. Rule evaluation: If scores exceed thresholds, auto-actions trigger (hide, delete, flag for review).
4. Audit logging: Every step is logged: content, provider, scores, rule matched, action taken, timestamp.
5. Transparency export: GET /v1/analytics/usage provides the data needed for DSA transparency reports.

Meeting specific DSA requirements

Audit trail: OpenModeration logs every moderation with provider, latency, scores, and decision. Data is retained per your configured policy (default 7 days for input text, 90 days for logs). All exportable for regulatory audits.

Transparency reporting: The analytics API provides usage data by period, provider, and category. Total requests, flagged rates, provider performance — exactly what DSA transparency reports require.

Data sovereignty: Self-host on your infrastructure. All data stays within your control. No third-party data processing. Essential for GDPR compliance and DSA risk assessments.

Human review: The manual review queue allows human moderators to handle edge cases, meeting DSA requirements for complaint handling and appeals.