Arthur vs CalypsoAI
Side-by-side comparison of framework coverage, pricing, capabilities, and target customers. Last verified recently.
https://aicompliancevendors.com/compare/arthur-vs-calypsoaiArthur
Performance and safety for LLMs and classic ML.
Arthur is an AI performance and safety platform founded in 2018 and headquartered in New York City. The platform provides monitoring, explainability, and bias detection for production ML, plus Arthur Shield for LLM firewall and red-teaming. Arthur raised a $42M Series B in September 2022 led by Acrew Capital and Greycroft, bringing total funding to approximately $56M.
CalypsoAI
Adaptive AI security for enterprise GenAI.
CalypsoAI is an AI security company founded in 2018 with co-headquarters in San Mateo, California and Dublin, Ireland. The platform provides runtime security for enterprise GenAI — scanning prompts and responses for prompt injection, data leakage, and policy violations — with adaptive policies that evolve with new attack patterns. The company has announced plans to grow its Dublin team to 100 employees.
What the data shows
We haven't published an editorial verdict on this pair yet. The comparison below is built from public vendor materials and our taxonomy — no editorialized ranking.
- Shared framework coverage: EU AI Act, GDPR Art. 22
- Only Arthur covers: NIST AI RMF
- Only CalypsoAI covers: ISO/IEC 42001
- Shared capabilities: 7 of 10 listed.
Want our editorial take? Email the editors or read our methodology.
At a glance
| Attribute | Arthur | CalypsoAI |
|---|---|---|
| Founded | 2018 | 2018 |
| Headquarters | New York, United States | San Mateo, United States |
| Employees | 51-200 | 51-200 |
| Funding | $56M total (Series B, September 2022) | Series A-1 (undisclosed recent) |
| Pricing | Shield has a free tier; enterprise monitoring is contact-only. | Enterprise only. |
| Website | Visit site | Visit site |
Framework coverage
| Framework | Arthur | CalypsoAI |
|---|---|---|
| EU AI Act | Partial | Full |
| GDPR Art. 22 | Partial | Partial |
| ISO/IEC 42001 | — | Partial |
| NIST AI RMF | Partial | — |
Capabilities
| Capability | Arthur | CalypsoAI |
|---|---|---|
| AI Model Inventory | ✓ | ✓ |
| Audit Evidence Collection | ✓ | ✓ |
| Bias & Fairness Testing | ✓ | ✓ |
| Explainability | ✓ | ✓ |
| LLM Guardrails & Content Filtering | ✓ | ✓ |
| LLM Red Teaming | — | ✓ |
| Model Monitoring | ✓ | ✓ |
| Policy Management | ✓ | ✓ |
| Regulatory Intelligence | — | ✓ |
| Risk Assessment Workflow | — | ✓ |
Industries served
Arthur
- Financial Services
- Healthcare
- Insurance
- SaaS & Technology
- Defense & National Security
CalypsoAI
- Financial Services
- Healthcare
- Defense & National Security
- Retail & E-commerce
- SaaS & Technology
Integrations
Arthur
- AWS SageMaker
- Google Vertex AI
- Databricks
- Snowflake
- OpenAI API
- Anthropic API
- GitHub
CalypsoAI
- AWS SageMaker
- OpenAI API
- Anthropic API
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Editorial independence: This comparison is free and was not paid for by either vendor. See our methodology.