H2O.aiThe Trusted Sovereign AI Platform
vs
Retell AIAI Voice Agents That Automate Phone Calls
Comparison · AI Agents · weekly run Nov 3
H2O.ai vs Retell AI
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Retell AI is the stronger AI pick in AI Agents: it has a visibility score of 2 versus 0.4 for H2O.ai.
Choose H2O.ai if…
- You need FedRAMP High coverage
- You prefer a larger, established vendor (201–500 employees)
- Explainable, open-source-driven predictive and agentic tooling
- Go-to platform for automated machine learning (AutoML)
Choose Retell AI if…
- You want the brand AI engines rank higher (2 vs 0.4)
- You need a self-hosted or on-premises option
- You need GDPR or ISO 27001 coverage
- Highly rated by developers and SMBs
AI visibility side by side
Latest weekly run · Nov 3
| Metric | H2O.ai | Retell AI |
|---|---|---|
| Visibility score | 0.4% | 2% |
| Change vs last week | New | New |
| Rank in AI Agents | #70 | #42 |
| Share of voice | 0.2% | 0.5% |
| Mentions this run | 1 | 3 |
| Positive in AI answers | 29% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
H2O.ai 0pp · Retell AI 0pp over 0 weekly runs.
Engine by engine
Retell AI leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
H2O.aiRetell AI
Head to head in AI answers
0 engine answers name both brands
0H2O.ai ranked higher
0Retell AI ranked higher
Features, pricing & fit
| Dimension | H2O.ai | Retell AI |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Contact sales |
| Free plan | — | Yes |
| Deployment | On-premises, fully air-gapped, private cloud, or public cloud | Cloud platform, with enterprise on-premises deployment available |
| Compliance | SOC 2 Type II, HIPAA, FedRAMP High | HIPAA, SOC 2 Type II, GDPR, ISO 27001 |
| Support | Forward Deployed Engineers embedded on-site | Community and email support, 24/7 omnichannel support with dedicated portal (Enterprise), Dedicated implementation support (Enterprise), Named account manager (Enterprise) |
| Founded | 2012 | 2023 |
| Headquarters | Mountain View, California, United States | Redwood City, California |
| Employees | 201–500 | 51–200 |
| Funding | Series E · $250M raised | Seed · $5M raised |
| Best for | Regulated enterprises and public-sector agencies that need predictive, generative and agentic AI on their own infrastructure, including air-gapped deployments. | Businesses that run high call volumes in healthcare, insurance, financial services, logistics and similar fields, and teams that want to build and change voice agents themselves. |
Plans side by side
H2O.ai
Pricing not available.
Retell AI
Pay as you go$0per minute, $0.07-$0.31 for voice agents
EnterpriseCustomcustom pricing
Pros and cons
Themes from the AI answers that mention each brand
H2O.ai
- Explainable, open-source-driven predictive and agentic tooling
- Go-to platform for automated machine learning (AutoML)
- Robust enterprise modeling and rapid deployment
- Listed among enterprise end-to-end MLOps platforms
Retell AI
- Highly rated by developers and SMBs
- One of the highest customer star ratings
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “H2O.ai vs Retell AI”, https://slateindex.ai/compare/h2o-ai-vs-retell-ai, data of Nov 3, 2026. Licence: CC BY 4.0.