Spines, an AI publishing platform based in Tel Aviv and New York, announced on November 9 that it has secured $64 million in growth capital, according to the company's press release.
The total combines a $29 million Series A-1 equity round led by Zeev Ventures with a $35 million non-dilutive growth financing facility from Twelve. Aleph, NordStar, M-Fund, LionTree and angel investor Dan Senor also participated in the equity round.
Spines says it has reached a $50 million revenue run rate with 400% year-over-year growth. More than 8,000 American authors have published books through the platform, and about 400 new authors join each month, according to the company.
The platform uses specialized AI agents for editing, proofreading, cover design, formatting, metadata, translation, audiobooks, distribution, royalties and marketing, with in-house human editors, proofreaders and designers available on request. Spines says it distributes books through more than 100 channels and shortens a process that traditionally takes 12 to 18 months to a matter of weeks. Authors bring their own manuscripts; CEO Yehuda Niv said, "We don't believe the future of publishing is AI writing books."
The round is an example of a vertical agent business with reported revenue at scale: rather than selling a general assistant, Spines chains task-specific agents across an entire production workflow and keeps humans available for quality control.