telli is a voice AI platform that puts LLM-powered phone agents on your frontline: handling real customer calls without dialogue trees, rigid scripts, or a human on standby for every interaction.
Founded in Berlin in 2024 by Finn zur Mühlen, Philipp Baumanns, and Seb Hapte-Selassie, telli was built around a specific problem: high-volume B2C call operations where a clunky IVR or a missed follow-up actually costs you customers. The platform covers both directions: outbound campaigns for lead qualification and appointment booking, and inbound lines for support, triage, and scheduling, all managed from one place.
Teams set up agents through a no-code flow builder, or go deeper with the REST API for custom call logic. Most customers connect telli directly to their CRM and calendar so call outcomes sync automatically, with a built-in handoff path to a human agent whenever a conversation needs one. The company is backed by Y Combinator and Cherry Ventures and works with customers across Germany, the UK, Latin America, and the US.