Side-by-side comparison of AI visibility scores, market position, and capabilities
Substack is the newsletter and publishing platform that reached $1.1B valuation in July 2025 with 5M paid subscribers and $450M+ in annual writer gross revenue, becoming a major media distribution platform.
Substack is a publishing platform that enables writers, journalists, and creators to publish newsletters and build subscriber communities with integrated payment infrastructure. Founded in 2017 by Chris Best, Hamish McKenzie, and Jairaj Sethi, Substack popularized the creator-owned newsletter model by making it trivially easy to start a paid newsletter, handling payments, delivery, and subscriber management so writers could focus entirely on their content.
German craftsman AI voice agent answering calls and scheduling 24/7 for 1M+ Handwerk businesses; YC-backed targeting phone automation for HVAC, plumbing, and electrical trades in Germany.
Hey Telo is a Berlin-based AI voice agent company building phone-answering and administrative automation specifically for Germany's 1 million+ independent craftsman businesses (Handwerksbetriebe) — HVAC technicians, plumbers, electricians, carpenters, and other skilled trades — who lose significant revenue daily to unanswered calls and administrative burden. A Y Combinator-backed startup, Hey Telo provides voice AI agents that answer calls professionally 24/7, schedule appointments, and provide quotes while the craftsman is on-site working.
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