Spines lands $64M to expand AI-assisted book publishing
The financing combines equity with a growth facility. Company-reported author and revenue figures leave a separate question about books published.
Key Takeaways
- •Twelve’s $35 million growth facility accounts for about 55% of the financing headline.
- •Spines reports a $50 million revenue run rate and more than 8,000 American authors.
- •The announcement does not give facility draw terms, a valuation or the number of books published.
Spines, which lists a Boynton Beach office, announced $64 million in financing on Nov. 9 to expand its AI-assisted book publishing business: $29 million in equity and a $35 million growth facility.
The South Florida tie comes in pieces. Its contact page lists 1500 Gateway Blvd., Suite 220, and Refresh Miami calls the company Boynton Beach-based. The funding announcement carries Tel Aviv and New York datelines. In February 2025, Refresh Miami reported about 20 of Spines’ 100 employees worked in South Florida.
Two kinds of money
Zeev Ventures led the Series A-1, with Aleph, NordStar, M-Fund, LionTree and Dan Senor participating. Twelve supplied the non-dilutive facility, which makes up 55% of the headline number.
Equity is cash for a stake. A facility’s announced size is capacity, and what reaches the company depends on draw conditions and repayment terms. The announcement gives neither those terms nor a valuation.
Numbers from the company
Spines reported a $50 million revenue run rate, up 400% in a year, more than 8,000 American authors on the platform and about 400 joining each month. A run rate annualizes the current pace of revenue, and the figures are company-reported.
- Series A-1 equity: Figure: $29 million
- Growth facility from Twelve: Figure: $35 million
- Revenue run rate: Figure: $50 million
- Annual growth: Figure: 400%
- American authors: Figure: 8,000-plus
Authors pay the bill
Customers are writers buying a publishing project. Spines’ product page offers print, ebook and audiobook production, editing, design, translation and distribution, and its package page ties extra services to tiers and add-ons.
That model drew fire in 2024, when The Guardian reported fees of $1,200 to $5,000 and a plan to publish up to 8,000 books in 2025. Independent publisher Canongate accused the company of producing books “with the least possible attention, care or craft.” The Society of Authors urged caution over AI systems possibly trained on unlicensed content.
Founder and CEO Yehuda Niv called Spines a “publishing platform” in that report, and the company said authors keep full royalties. Spines said technology shortened publication time and told the outlet that requested editing would be done solely by human editors.
Its new announcement counts authors and gives no total of books published.
