Basis
“Can vertical AI agents built specifically for accounting firms shift accountants from doers to reviewers and expand firm revenue capacity?”
Founded2023
HQNew York, NY, USA
FoundersMitchell Troyanovsky, Matt Harpe
Total raised$137.6M
Latest roundSeries B, February 2026
Valuation$1.15B
IndustryVertical SaaS / Accounting
The story
Basis (legal entity Essex Labs, Inc.) was founded in 2023 to build agentic AI specifically for public accounting firms — automating close, tax, audit, and advisory workflows rather than replacing bookkeepers. It moved fast: Series A in December 2024 (Khosla), then a $100M Series B at $1.15B in February 2026 (Accel + GV) puts it in the unicorn tier for accounting AI. The 2026 launch of an End-to-End Tax Platform signals expansion from CAS/close workflows into full tax return preparation — going deeper into the accountant's workflow rather than broader across finance functions.
Product timeline
2023
Essex Labs, Inc. d/b/a Basis founded by Mitchell Troyanovsky and Matt Harpe in New York· founding
2024
Series A round led by Khosla Ventures· funding
2026
$100M Series B at $1.15B valuation led by Accel; entered unicorn status· funding
2026
Launched End-to-End Tax Platform — first platform to deploy agents across the entire tax return· pivot
The stack
0 layers disclosed in Basis’s embedded-finance stack
Accounting gap: none