Double Raises $6.5M Series A To Scale AI-Based Close Management For Accounting Firms
Double, formerly known as Keeper, secured a $6.5 million Series A led by Album Ventures with participation from Jack Altman, Y Combinator, and others. This brings total funding to over $12.5 million.
The New York company is building a unified workspace for accountants to run the month-end close and manage client collaboration without relying on manual checklists, versioned spreadsheets, and endless email threads. The approach: centralize client data, automate repetitive work, and keep human judgment intact for review, reconciliation, and advisory.
Why this matters to firm leaders
- Close cycles are still slow, error-prone, and scattered across tools. Consolidation reduces context switching and review time.
- AI can handle repetitive checks and requests, freeing teams to focus on higher-value client work.
- Vendors with strong retention and usage data signal lower adoption risk and better long-term ROI.
What the platform covers
- Task tracking and assignment for monthly delivery and quality control.
- Automated checks that flag errors and reduce review time.
- Client collaboration that consolidates requests and document sharing to replace email chains.
- File reviews and communication in one place to keep teams aligned.
Traction at a glance
- Used by 4,000+ accounting and bookkeeping firms across North America.
- Supports the close for hundreds of thousands of businesses each month.
- Reports "dozens of hours" saved per team per week.
- Net dollar retention at 150%, pointing to expansion within existing firms.
- Headcount expanded across engineering and go-to-market, more than doubling the company's size.
Rebrand and product direction
The company rebranded from Keeper to Double in October, signaling a focus on increasing accountants' capacity, accuracy, and impact. The roadmap centers on automating and streamlining core close workflows while keeping accountants in control.
How to evaluate Double (or any close management system)
- Workflow fit: Map your current monthly close and client request flows; verify the system mirrors how your team actually works today.
- Controls and audit trail: Confirm role-based permissions, review histories, and exportable logs for compliance.
- Data security: Ask for certifications, encryption standards, and data residency details.
- Integrations: Check coverage for GL, payroll, expense, and document systems you already use.
- Change management: Ensure templated onboarding, training, and admin controls that minimize disruption.
- Pricing and ROI: Model time savings per role against license and implementation costs.
- Vendor stability: Look at retention, customer references, and pace of product delivery.
Low-risk pilot plan
- Select 2-3 client cohorts (simple, moderate, complex) to test end-to-end.
- Define success: cycle time reduction, review time saved, fewer back-and-forth requests, and error rates.
- Run one full close, then standardize repeatable steps into templates.
- Document gaps, iterate, and expand to the next set of clients.
Metrics to track in the first 90 days
- Close cycle time per client and per entity.
- Review hours per accountant and per manager.
- Number of requests and average response time.
- Exceptions flagged vs. resolved before review.
- Team adoption: daily active users and completion rates on assigned tasks.
What leaders are saying
Ben Stein, Co-Founder and CEO, Double: "Accounting is the heartbeat of every business, but accountants are still held back by tools built for an earlier era. With Double, we're helping firms focus on the high-value work that truly matters - judgment, insight, and client relationships - while automating the rest."
Sid Krommenhoek, Album Ventures: "Double is reshaping the future of accounting software by building with, not against, the professionals who power it. Their focus on augmenting accountants - not automating them away - has resonated deeply with firms who have long been underserved by legacy systems."
Sid Krommenhoek, Album Ventures: "Double's growth is remarkable because it solves one of the most persistent pain points in finance: manual, fragmented close processes. We believe Double will become the operating system for modern accounting firms."
Use of funds
- Accelerate product development and AI-enabled features to reduce repetitive work and improve reporting quality.
- Expand engineering and customer success teams.
- Grow the partner ecosystem across accounting firms and technology platforms.
Investor and ecosystem notes
The round includes returning investor Jack Altman (co-founder and CEO of Lattice) and Y Combinator. Earlier backers include Mathilde Collin (Front), Rahul Vohra (Superhuman), and William Hockey (CEO of Column; co-founder and former CTO of Plaid).
For managers building AI capability in finance
- Explore practical AI tools for finance teams: AI tools for finance.
- Build skills across your team with curated courses by role: Courses by job.
Your membership also unlocks:
