Retell AI vs Walnut
Side-by-side comparison of AI visibility scores, market position, and capabilities
Developer-first voice AI infrastructure API for building phone agents; low-latency streaming pipeline with multi-LLM and telephony support competing with Vapi for production voice applications.
About
Retell AI is a voice AI infrastructure platform providing APIs and tools for building conversational AI phone agents with low latency, natural turn-taking, and integration with major telephony providers and LLM providers. Founded in 2023 and headquartered in San Francisco, Retell AI has rapidly gained developer traction for its straightforward API, extensive documentation, and emphasis on production-grade reliability for AI voice applications in customer service, sales, and healthcare use cases.
Israel YC W20 interactive sales demo platform creating personalized product demos 91% faster for Adobe, NetApp, Funnel;
About
Walnut is a Tel Aviv, Israel-based interactive sales demo platform — backed by Y Combinator (W20) with $56 million in total funding including a $35 million Series B in January 2022 led by Felicis Ventures with NFX and Eight Roads Ventures — providing enterprise sales teams with an AI-powered platform for creating, customizing, personalizing, and analyzing interactive product demonstrations 91% faster than traditional demo creation methods. Serving enterprise clients including Adobe, NetApp, and Funnel, Walnut offers pricing from $9,200 annually (Lite) to $20,000+ annually (Pro) for unlimited demos and advanced customization, enabling sales engineers and account executives to create tailored product demos for each prospect without engineering dependency on production systems.
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