Free plans (5)
Their limits are stated in different terms, so they aren't ranked against each other. Ordered by first paid price.
| Tool | Stated limits | What makes you upgrade | First paid price | Kind |
|---|---|---|---|---|
 Arize AIRead Oct 29, 2026 |
AX Free: 25k spans per month, 1 GB ingestion per month, 15 days retention, 10 Signal issues per month, unlimited users and evals, SaaS only. No credit card required."No credit card required"Source | More than 25,000 spans: AX Pro includes 50,000 | $50/moAX Pro | Free plan |
 IBM watsonx.governanceRead Nov 8, 2026 |
Free toolbox playground: up to 300,000 foundation model tokens, 20 Compute Usage Hours and 100 text extraction documents per month. What happens after the allowance is not stated."Foundation Models: Up to 300,000 tokens per month"Source | Not stated | $3,500/moRisk & Compliance - Basic (IBM Cloud) | Free plan |
 Databricks Unity CatalogRead Nov 8, 2026 |
Databricks Community Edition: free, limited functionality platform for learning Spark"Databricks Community Edition is a free, limited functionality platform designed for anyone who wants to learn Spark."Source | Not stated | $0.07/DBU | Free plan |
 Fiddler AIRead Oct 29, 2026 |
Free plan includes real-time guardrails (hallucinations, toxicity, PII/PHI, prompt injection, jailbreak) under 80ms latency; Developer plan is usage-based at $0.002 per trace after that"The Free plan includes real-time guardrails powered by Fiddler Centor Models at under 80ms latency, protecting against hallucinations, toxicity..."Source | Developer plan is usage-based at $0.002 per trace after that | $0.002/trace | Free plan |
 LakeraRead Nov 8, 2026 |
Community plan at $0 per month with 10k requests per month and 8k token maximum prompt size; contact sales to upgrade"The default pricing plan (Community) provides free access to a limited number of requests."Source | Contact sales to upgrade | – | Free plan |
Time-limited or one-off (1)
Listed as free on the vendor's page, but the allowance runs out or doesn't renew. Not counted as free plans above.
| Tool | Stated limits | What makes you upgrade | First paid price | Kind |
|---|---|---|---|---|
 SuperwiseRead Oct 29, 2026 |
Chat Solo is free for the first 12 months for one user (card required), then $9 per user a month"Free for your first 12 months. Card required. $0 due today; $9 per user a month after 12 months."Source | Chat Solo is free for the first 12 months for one user (card required), then $9 per user a month | $10/moSentinel Solo | Time-limited |
Free trial only (2)
- Domo AI Governance: 30-day free trial, no credit card required
- Microsoft Purview: Free trial offered for Microsoft Purview Suite; length not stated
Questions
Which AI governance tools are free?
5 have a free plan you can keep, including Arize AI, Databricks Unity Catalog, Fiddler AI, IBM watsonx.governance, Lakera.
What do you pay after a free plan?
The lowest first paid price among tools with a free plan is $50/mo (Arize AI). Read from each vendor's own page.
How this page is made
Every limit is the vendor's own, read from its pages and quoted. A tool counts as a free plan when the text describes something you can keep using; a fixed number of days or a single batch of credits is listed separately. We don't test the plans. How prices are read.