Cartesia Managed Agents - Enterprise voice agents with telephony, tools and knowledge

Cartesia Managed Agents is an end-to-end voice agent platform for enterprise conversations, built by the team behind Cartesia’s voice models.

Problem: Voice agents built from separate pieces, with speech recognition, a language model and text-to-speech chained together, can sound less natural and handle turn-taking and interruptions poorly. Speech-to-speech models sound better, but they’re harder to control and less reliable for enterprise tasks.

Solution: Cartesia co-designed its voice models and its agent harness, so listening, turn-taking, reasoning, tool calling and speech are tuned as one system. The platform also bundles telephony, knowledge bases and tool integrations, so you build in one place at play.cartesia.ai/agents.

What makes it different: Per Cartesia, it ranks #1 of 30 agents on Artificial Analysis’ Speech Agent Arena, at 1,115 preference Elo, against 1,099 for the next-best, Gemini 3.1 Flash Live Minimal. It also scored 87.4% accuracy and 90.7% experience on ServiceNow’s EVA-Bench, the highest in the post’s comparison. In Cartesia’s own evaluation, callers reported no turn-taking issues in 85% of conversations, against 67% for other agents.

Key features:

• Tool calls to backend APIs, CRMs and systems of record during a call

• Knowledge bases that prefill context dynamically, so the agent answers without pausing to search

• Outbound campaigns in batches of thousands of personalized calls

• Telephony included

• Mid-conversation switching among English, Spanish, Hindi, French and Japanese, with 44 languages planned

• Launch pricing of $0.03 per minute, which Cartesia says is 50% off

Who it’s for: Enterprise teams in areas like finance, retail, hospitality and healthcare that want voice agents for support, sales or outreach calls.