Basis, an AI agent platform built for accountants, has raised $100 million in Series B funding at a $1.15 billion valuation. The round was led by Accel, with participation from GV and Lloyd Blankfein, alongside existing backers including Khosla Ventures, which doubled down on its investment. Accel’s Miles Clements will join Khosla Ventures’ Keith Rabois on the company’s board.
The latest raise comes as the accounting industry faces mounting pressure from long-standing talent shortages, rising client expectations, margin compression, and increasing staff burnout. Firms are also being forced to turn away work as capacity constraints intensify. Against this backdrop, Basis is positioning its AI agents as a solution to automate complex workflows across Client Accounting Services, tax, and audit practices.
The company says it is now working with approximately 30% of the Top 25 accounting firms, deploying what it describes as “long-horizon” agents capable of autonomously completing multi-step accounting workflows over extended periods of time. These agents operate continuously in the background, coordinating tasks across accounting processes and returning completed deliverables for human review. Basis recently demonstrated what it said was the first AI agent to autonomously complete an end-to-end 1065 tax return.
Basis collaborates closely with leading foundation model labs to deliver advanced AI capabilities tailored to accounting use cases. In addition to customer-facing deployments, the company is also applying an agent-native model internally through a dedicated team called Atlas, which builds internal agents across engineering, sales, talent, and other functions.
The new capital will be used to accelerate platform development, expand engineering and machine learning teams, and build increasingly advanced agents capable of handling more complex workflows. The company’s broader goal is to equip accounting firms with high-performing, accurate AI tools that drive efficiency gains, enable higher-value services, and improve quality of life for accountants.
Founded by Matthew Harpe and Mitchell Troyanovsky, Basis is backed by investors including Khosla Ventures, Accel, Better Tomorrow Ventures, NFDG, and BoxGroup.
KEY QUOTES
“What stands out about Basis is how deeply they think about architecting and deploying real agents that do real work in the real economy. 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.”
Miles Clements, Partner at Accel
“Basis is on the frontier of building production-grade, long-horizon agents. They’ve pushed the limits of what we thought our models could do on real-world, economically valuable, complex accounting tasks. They’ve been a great collaborator in helping us shape what the future of agents looks like.”
Prashant Mital, Applied AI Lead at OpenAI
“Basis is already radically changing how work gets done at the best firms, driving 20-50% efficiencies across practices. In 2026, we expect Basis to drive the same step-change in accounting that software engineering saw in 2025.”
Vinod Khosla, Khosla Ventures
“Basis is building the agent-native organization of 2030. We have too much to do in too little time, and are executing with rare clarity and speed.”
Keith Rabois, Managing Director at Khosla Ventures
“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.”
Matt Harpe, CEO and Co-Founder of Basis
