Artificial intelligence agent platform for accountants startup Basis today revealed that it has raised $100 million in new funding on a $1.15 billion valuation to accelerate development of its platform and to increase its headcount.

Founded in 2023, Basis offers software designed to automate structured accounting workflows across tax, audit and advisory functions.

The company’s platform is built around agent-based architecture that executes multistep financial processes using large language models combined with rules-based controls and domain-specific accounting logic. The agents are focused on targeting labor-intensive tasks such as document review, reconciliation and tax preparation, areas where firms face staffing constraints and increasing compliance complexity.

Basis’s agents ingest structured and unstructured data from client documents, accounting systems and enterprise resource planning platforms and then analyze financial records, extract relevant fields, perform calculations and apply validation rules within predefined compliance frameworks. Human users remain in the loop for review and approval, while the agents handle data gathering, drafting and workflow progression within integrated firm systems.

“Our sole focus is to equip accountants with the highest-performing, most accurate AI for accounting and to empower firms to drive new growth, provide higher-value service and improve accountant quality of life across every one of their practices,” explained co-founder and Chief Executive Matt Harpe.

Key features of the Basis platform include the automated preparation of tax returns, audit testing procedures, workpaper generation and reconciliation tasks. The platform supports document classification, data extraction, variance analysis and cross-referencing across financial statements and maintains audit trails and structured outputs that align with firm documentation standards.

Basis counts among its customers approximately 30% of the Top 25 accounting firms that are deploying agents that complete complex accounting workflows end-to-end across their client accounting services, tax and audit practices. Notable customers include Boulay PLLP, Clark Nuber PS, MarksNelson LLC, Pinion LLC and UHY LLC.

The Series B funding round was led by Accel Partners LP, GV Management Co. (Google Ventures) and Lloyd Blankfein, with Khosla Ventures, NFDG Ventures, Better Tomorrow Ventures, Box Group, Avid Ventures and a number of individual investors also participating. Notable among the individual investors are Quora Inc. CEO Adam D’Angelo, Replit Inc. CEO Amjad Masad and Hugging Face Inc. CEO Clem Delangue.

“What stands out about Basis is how deeply they think about architecting and deploying real agents that do real work in the real economy,” said Miles Clements, a partner at Accel. “Across multiple investments at the frontier of AI, we’ve seen the same pattern again and again: Teams that get the fundamentals right tend to pull away quickly. Basis is years ahead in accounting AI and we believe it has what it takes to define this category as it matures.”

The company’s last funding round before today was $34 million in December 2024.

Photo: Basis