Fiber AI vs Circleback
Side-by-side comparison of AI visibility scores, market position, and capabilities
SF YC S23 B2B prospect data at 4x lower cost than Clay/Apollo/ZoomInfo with 40M+ companies and 850M+ professionals; TRAC/YC/Soma seed serving Ramp and DocuSign with 50+ data providers for surgical TAM list building.
About
Fiber AI is a San Francisco-based AI B2B prospecting and data platform — backed by Y Combinator (S23) with seed funding from TRAC, Y Combinator, and Soma Capital — providing GTM teams, sales organizations, and recruiting teams at enterprises and fast-growing startups with a comprehensive contact data and prospect list building platform that aggregates 40+ million companies, 850+ million professionals, 13+ million jobs, and 50+ data providers to deliver verified contact information at 4x lower cost than alternatives like Clay, Apollo, or ZoomInfo. Founded in 2023 by Adi Agashe and Neel Mehta, Fiber AI serves customers including Ramp, DocuSign, and Flatfile — enabling surgical TAM (total addressable market) list building with advanced filters for targeted outbound prospecting and outbound recruiting.
SF YC W24 AI meeting notes at $16.8M revenue 2024 with only 4 employees and cash flow positive; $3M seed from ex-Stripe/Tableau founders competing with Otter.ai and Fireflies for AI-powered action tracking with Slack/Notion/HubSpot/Salesforce integration.
About
Circleback is a San Francisco-based AI-powered meeting notes and action tracking platform — backed by Y Combinator (W24) with $3 million in total funding including a $2.5 million seed in November 2024 from YC, Rebel Fund, Pioneer Fund, Transpose Platform, and angels including Kulveer Taggar, Oliver Jung, JJ Fliegelman, Rich Aberman, and Jason Freedman — generating $16.8 million in annual revenue in 2024 with only 4 employees, achieving cash flow positive status through primarily organic growth, and serving thousands of paying customers. Founded by Ali Haghani (ex-Stripe) and Kevin Jacyna (ex-Tableau), Circleback automatically joins meetings (Zoom, Google Meet, Microsoft Teams), transcribes conversations with AI, generates structured meeting notes with action items, and distributes summaries to participants and connected tools (Slack, Notion, HubSpot, Salesforce).
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