Sierra vs Yellow.ai
Sierra and Yellow.ai are both customer support tools aimed at enterprise. Only Yellow.ai has a free plan.
Enterprise AI agent platform for customer service in chat and voice
Enterprise agentic AI platform for chat, voice and email support
| Pricing | Paid | Freemium |
| Starting price | Not published | Not published |
| Free plan | No | Yes |
| Free trial | — | — |
| Built for | Enterprise | Enterprise |
| Platforms | web | web |
| Country | US · 2023 | US · 2016 |
| Rating | — | — |
Choose Sierra if
Large consumer brands with high contact volumes that want AI agents to resolve requests end to end across chat and voice.
- Built to complete tasks in your systems, not just answer questions
- Voice and digital channels run on the same agent
- Outcome-based pricing aligns cost with results
Look elsewhere if: Small and mid-sized support teams that want a self-serve chatbot with public pricing (Intercom Fin, Tidio Lyro, Chatbase).
Choose Yellow.ai if
Large enterprises and contact centers that need multilingual voice and chat AI agents with strict compliance requirements.
- Covers voice, chat and email automation in one platform
- Very broad language support for global contact centers
- Strong compliance credentials for regulated industries
Look elsewhere if: Startups and SMBs adding a simple support bot (Intercom Fin) or product teams wanting a hands-on agent builder (Voiceflow, Botpress).
Sierra vs Yellow.ai pricing
Sierra
- EnterpriseCustomOutcome-based: you pay for results the agent delivers
Yellow.ai
- Free$01 AI agent, 500 sessions/mo, then $0.99 per resolution
- EnterpriseCustomUnlimited agents and sessions, 35+ channels, SOC 2, ISO, GDPR
Sierra · Key features
- Agent Studio for building and managing AI agents with or without engineers
- Ghostwriter builds an agent from SOPs, transcripts or call recordings
- One agent across chat, SMS, WhatsApp, email, voice and ChatGPT
- Agents take actions in back-end systems such as order and billing tools
- Horizon plans multi-step customer outcomes over days or months
- Insights with conversation explorer, monitors and multivariate experiments
Cons
- No self-serve plans, public prices or free trial
- Aimed at large enterprises; overkill for small support teams
- Deployments need integration work with your back-end systems
Yellow.ai · Key features
- Nexus platform to build, deploy and self-heal AI agent workforces
- Nexus VOX voice agents that handle calls in 500+ languages
- Nexus EDGE desktop agents with human approval on every action
- 35+ channels including WhatsApp, web chat, SMS, email and voice
- 150+ prebuilt integrations with Salesforce, Zendesk, Genesys, NICE
- Access to 15+ LLMs with LLM analytics and sentiment tracking
Cons
- Enterprise pricing is quote-only and contracts are large
- Free tier is limited to one agent and basic features
- Implementation usually needs vendor or partner services
Sierra vs Yellow.ai: FAQ
Do Sierra and Yellow.ai have a free plan?
Sierra has no free plan. Yellow.ai has a free plan.