Spark, Khosla, Sequoia Back Anrok in $55 Million Round to Bring AI to Tax Compliance
- ByStartupStory | October 21, 2025
In a major boost for AI-driven enterprise solutions, Anrok Inc., a startup helping software companies automate sales tax compliance, has raised $55 million in a Series C funding round, more than doubling its valuation to $525 million.
The round was led by Spark Capital, with participation from Sapphire Ventures, Khosla Ventures, Sequoia Capital, and Index Ventures. The funding underscores investors’ growing confidence in intelligent automation tools tackling one of the most complex aspects of modern business — tax compliance.
Founded in 2020 by Michelle Valentine, Anrok has built an AI-powered tax compliance platform that monitors obligations, calculates taxes, and files returns automatically. The company’s solution is specifically designed for high-growth, globally distributed software companies — a segment that faces increasingly intricate tax obligations across multiple jurisdictions.
“Scale and speed in real time is what matters when it comes to getting tax right,” said Michelle Valentine, Co-founder and CEO of Anrok. “If you’re using a legacy solution built for retail, not for the speed and complexity of today’s AI companies, there’s a real cost to your bottom line.”
Anrok’s clients include a number of leading AI startups such as Anthropic, Mistral, and Cursor, underscoring its relevance in the fast-evolving software ecosystem.
Valentine’s journey to founding Anrok began during her tenure at Index Ventures, where she focused on AI investments. It was there she noticed a critical gap: most tax tools catered to retail, not to globally scaling software firms. The 2018 Supreme Court ruling in South Dakota v. Wayfair Inc., which required businesses to collect sales tax even without a physical presence in a state, amplified this challenge — particularly for digital-first and remote companies.
With the rise of remote work post-pandemic, teams dispersed across states and countries, making compliance even more complex. Anrok’s platform aims to simplify that reality through automation, ensuring that companies can remain compliant while scaling rapidly.
“AI startups in particular use Anrok because we can keep up with their crazy growth and global scale,” Valentine added.
With this latest funding, Anrok plans to further enhance its AI capabilities and expand its reach among software and AI companies navigating global tax challenges.
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