C3 AIThe Agentic Operating System for Enterprise AI
vs
SimThe open-source AI workspace to build, distribute, and govern AI agents
Comparison · AI Agents · weekly run Nov 3
C3 AI vs Sim
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Sim is the stronger AI pick in AI Agents: it has a visibility score of 2.3 versus 0.9 for C3 AI.
Choose C3 AI if…
- You need SOC 1 or SOC 2 or SOC 3 or FedRAMP or FedRAMP Moderate or FISMA or FIPS 140-2 or ITAR or HIPAA or PCI DSS Level 1 or DoD IL5 or DoD IL6 coverage
- You prefer a larger, established vendor (1,001–5,000 employees)
- Enterprise-scale AI solutions
Choose Sim if…
- You want the brand AI engines rank higher (2.3 vs 0.9)
- You need a self-hosted or on-premises option
- You need SOC 2 Type II or ISO 27001 or GDPR coverage
- Technical control and model flexibility
AI visibility side by side
Latest weekly run · Nov 3
| Metric | C3 AI | Sim |
|---|---|---|
| Visibility score | 0.9% | 2.3% |
| Change vs last week | New | New |
| Rank in AI Agents | #59 | #39 |
| Share of voice | 0.5% | 0.7% |
| Mentions this run | 3 | 5 |
| Positive in AI answers | — | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
C3 AI 0pp · Sim 0pp over 0 weekly runs.
Engine by engine
Sim leads on 2 of 3 engines
ChatGPT
AI Mode
Perplexity
C3 AISim
Head to head in AI answers
0 engine answers name both brands
0C3 AI ranked higher
0Sim ranked higher
Features, pricing & fit
| Dimension | C3 AI | Sim |
|---|---|---|
| Pricing model | — | Per seat |
| Entry price | — | Free; paid from $25 per seat / mo |
| Free plan | — | Yes |
| Deployment | The company says its platform runs across any infrastructure. | Cloud-hosted, or self-hosted in your own cloud with Docker or Kubernetes |
| Integrations | — | 275+ |
| Compliance | SOC 1, SOC 2, SOC 3, FedRAMP, FedRAMP Moderate, FISMA, FIPS 140-2, ITAR, HIPAA, PCI DSS Level 1, DoD IL5, DoD IL6 | SOC 2 Type II, ISO 27001, GDPR |
| Support | Customer Support Portal, 24/7 support line in customer contract, Email support@c3.ai | Dedicated support on the Enterprise plan |
| Founded | 2009 | 2025 |
| Headquarters | Redwood City, California | San Francisco, CA, United States |
| Employees | 1,001–5,000 | 11–50 |
| Funding | IPO | Series A · $7M raised |
| Best for | Large operators in defense and intelligence, maritime, manufacturing, federal government, oil and gas, utilities and healthcare. | Companies that need to build, deploy, and govern AI agents across the organization with central control over access, spend, and data |
Plans side by side
C3 AI
Pricing not available.
Sim
Free$0free forever
Pro$25per user/month, billed monthly
Max$100per user/month, billed monthly
EnterpriseCustomcustom, talk to sales
Pros and cons
Themes from the AI answers that mention each brand
C3 AI
- Enterprise-scale AI solutions
- Placed in ISG's Merit tier rather than top tiers
Sim
- Technical control and model flexibility
- Self-hosting option
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “C3 AI vs Sim”, https://slateindex.ai/compare/c3-ai-vs-sim, data of Nov 3, 2026. Licence: CC BY 4.0.