Is Azure AI Content Safety free? What it actually costs in 2026
Yes, there is a free tier — with limits.
Usage-based per 1,000 text records or images analysed, with a free monthly allowance. Individually the rates are small; the bill scales with every message in both directions, since you moderate input and output. High-traffic conversational products are where the line becomes visible.
When paying is still the right call
Stay if you are on Azure and this is a compliance checkbox. When an auditor wants a named vendor with a documented moderation policy and an SLA, a self-hosted classifier is a harder conversation regardless of whether it performs better. Stay if you have no one to own the classifier, thresholds and false-positive review, because a badly tuned guardrail is worse than none — it blocks real users while missing real attacks. And stay if you need image moderation at scale, where the open options are genuinely weaker. The tools below are for teams who need policies the taxonomy cannot express, or cannot send content off-network at all.
What you are locked into
Low. Moderation is a stateless call at a well-defined boundary, so replacing it is a change at one integration point rather than a migration. What needs redoing is threshold tuning — the severity levels you have calibrated against are Microsoft's scale, and any replacement needs its own calibration run against real traffic before you trust it in blocking mode.
If you would rather not pay: NVIDIA NeMo Guardrails
NVIDIA NeMo Guardrails
Write your policy as rails, in a language built for it.
Free and Apache-2.0. Runs wherever you run it.
See all 5 Azure AI Content Safety alternatives comparedCompare the free options head-to-head
Pricing is verified against the vendor's published figures and dated above. Vendors change prices — confirm current numbers with Microsoft before you commit. More ai guardrails & content safety decisions on Macrostack.