Siena AI vs Zendesk AI Agents (formerly Ultimate.ai)

Side-by-side comparison of Siena AI and Zendesk AI Agents (formerly Ultimate.ai): pricing, features, API access, and community ratings.

AI comparison summary

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	Siena AI Empathic AI Agents for commerce Visit	Zendesk AI Agents (formerly Ultimate.ai) Self-improving AI agents for customer service that learn from every resolution Visit
Category	Customer support	Customer support
Pricing	Paid	Paid
Starting price	USD 750/mo	USD 19/mo
Free tier
Audience	All audiences	All audiences
API available
Open source
Self-hostable
Model provider		Zendesk (proprietary AI)
Founded		2017
Headquarters		San Francisco, USA
Key strengths	·Empathic AI customer service agents for e-commerce ·High automation rates (up to 80% of customer interactions) ·Multi-channel coverage (support, shopping, social, QA, VoC) ·Brand voice customization via AI Personas	·Self-improving AI via Resolution Learning Loop ·Multi-channel support (messaging, email, voice) ·No-training setup using existing knowledge and policies ·Multi-step and multi-intent workflow resolution