Double Raises $6.5 Million Series A from Album Ventures, Jack Altman, and Y Combinator to Double Accountants’ Productivity

Double (formerly Keeper) is transforming how accountants manage the month-end close and collaborate with clients—building the next-generation platform that streamlines workflows, reduces review time, and strengthens client relationships.

NEW YORK--(BUSINESS WIRE)--Double, the modern close management and practice management platform for accounting and bookkeeping firms, today announced a $6.5 million Series A round led by Album Ventures, with participation from returning investor Jack Altman, co-founder and CEO of Lattice, and Y Combinator. Earlier investors include Mathilde Collin, co-founder and CEO of Front; Rahul Vohra, founder and CEO of Superhuman; and William Hockey, CEO of Column and co-founder and former CTO of Plaid. In total, Double has raised more than $12.5 million to date.

For years, accounting firms have been promised automation, yet many teams remain buried in manual checklists, version-controlled spreadsheets and long email threads. Double solves this by offering a platform purpose-built for accountants: a unified workspace that centralizes client data, automates repetitive tasks and helps firms close their books faster without sacrificing accuracy or human judgement.

Building the Foundation for the Future of Accounting

Double began with a simple idea: accountants deserve software that keeps pace with their expertise. Today, the platform is used by more than 4,000 accounting and bookkeeping firms across North America to manage month-end close, client communication, and file reviews—all in one place.

In the past year, Double has seen record growth, helping firms close books for hundreds of thousands of businesses every month while saving dozens of hours per team each week. The company has grown its teams across engineering and go-to-market, more than doubling the company’s size in the last year. Net-dollar retention continues to hit 150%, underscoring their product-market fit and passion for making every customer successful.

In October, the company announced its rebrand from Keeper to Double, a name that reflects its mission to double the capacity, accuracy, and impact of accountants. Grounded in the principles of double-entry bookkeeping, Double builds technology that amplifies human expertise rather than replacing it.

“Accounting is the heartbeat of every business, but accountants are still held back by tools built for an earlier era,” said Ben Stein, co-founder and CEO of Double. “With Double, we’re helping firms focus on the high-value work that truly matters — judgment, insight, and client relationships – while automating the rest.”

Closing the Books on Manual Accounting

The fundamentals of accounting haven’t changed in 500 years, but the pace of work has never been faster. AI is expanding what’s possible every day, and firms are ready to invest in tools that move them toward that future today. But when a vision isn’t grounded in how people work today, it creates a gap between humans and the AI they’re meant to trust. And when the future finally arrives, that gap can become a chasm that overly visionary projects fall into.

Even as AI agents take on more tasks and greater complexity, human judgment will always matter. That’s why Double is building the AI-driven future of accounting on software designed for the people who remain at the center of the profession.

Double’s platform automates and streamlines core workflows across the close process, enabling accounting teams to work faster, smarter, and with higher accuracy:

• Close Management: Track progress, assign tasks, and ensure every month-end is delivered on time, boosted by AI-enhanced workflows for bank feed coding, journal entries and financial summaries.
• File Review & Quality Control: Automate checks and flag errors to reduce review time and boost accuracy, so accountants can focus on high-value judgment instead of manual reconciliation.
• Client Collaboration: Centralize client requests and document sharing to replace long email chains, improving responsiveness and strengthening client relationships.

“Double is reshaping the future of accounting software by building with, not against, the professionals who power it,” said Sid Krommenhoek at Album Ventures. “Their focus on augmenting accountants — not automating them away — has resonated deeply with firms who have long been underserved by legacy systems.”

“Double’s growth is remarkable because it solves one of the most persistent pain points in finance: manual, fragmented close processes,” said Krommenhoek. “We believe Double will become the operating system for modern accounting firms.”

Funding to Accelerate Product Innovation

Double will use the new capital to accelerate product development, expand its engineering and customer success teams, and grow its partner ecosystem among top accounting firms and technology platforms. The company will also continue to invest in AI-powered features that reduce repetitive work and enhance the quality of financial reporting.

Get a roundup of all the features Double released this year, with spotlights on AI features in every tier, in the Double Check Webinar Series.

About Double

Double is the modern close management and productivity platform for accounting and bookkeeping firms. Built to streamline workflows, improve accuracy, and strengthen client relationships, Double helps firms serve more clients without sacrificing quality. Founded in 2020, the company now serves thousands of accounting professionals and continues to expand its suite of tools built to amplify, not automate, human expertise.

For more information, visit doublehq.com.