Spines, which uses AI agents to edit and proofread amateur authors' books, design their covers, and handle the layout, raised $29M in equity and $35M in debt

The cost of self-publishing a book falls by thousands of dollars, making professional-quality production accessible to more aspiring authors.

Spines, an AI-powered digital publishing company based in Herzliya, Israel, has secured $64 million in funding. The round comprises $29 million in equity investment led by Zeev Ventures, with participation from Aleph and Dan Senor, and $35 million in debt financing from Twelve, a new fund established by the Outbrain cofounders. Spines utilizes AI agents to edit manuscripts, design book covers, and handle layout for amateur authors, distributing titles across major platforms in digital, audio, and print formats. The company has seen significant growth, with its Annual Recurring Revenue (ARR) increasing from $3.5 million two years ago to $50 million currently, serving 8,000 authors who have published over 12,000 books. Spines targets amateur authors who are not served by traditional publishers, offering a comprehensive service for $5,000-$7,000. The company also provides AI-driven translation services into multiple languages and is developing AI voice cloning for audiobooks, while actively rejecting AI-generated content.

This funding round underscores a significant market opportunity for AI-driven services aimed at democratizing creative industries. Spines' rapid ARR growth from $3.5M to $50M in two years highlights a strong demand from amateur authors seeking an efficient and cost-effective alternative to traditional publishing. The company's model, which bypasses the gatekeeping of established houses by leveraging AI for core production tasks, suggests a shift in how books can be brought to market.

The expansion into multiple languages and AI-powered audiobook narration signals Spines' ambition to become a comprehensive publishing platform rather than just a tool. This move will likely intensify competition in the self-publishing and audiobook creation spaces, potentially driving down costs and increasing quality across the board for a wider range of content creators.