Fractional CFO services in Boston
Boston is the United States' leading deeptech and life-sciences hub, with Kendall Square consistently ranked the most innovative square mile on earth.
The city has produced enterprise software and SaaS giants alongside its biotech lineage - HubSpot, Wayfair, Toast, Klaviyo, DraftKings and Snyk all scaled from Greater Boston. Annual venture deployment exceeds $15B, concentrated in Kendall Square, the Seaport District and Cambridge Innovation Center.
We work with Boston-based startups from seed to Series B+, supporting them on financial modelling, FP&A, fundraise prep, cap table management, KPI tracking and monthly close.
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Boston startup ecosystem
The world's foremost deeptech and biotech cluster
Kendall Square in Cambridge is the single most innovation-dense neighbourhood on the planet, housing MIT spin-outs, Broad Institute spin-offs and the US offices of every major life-sciences company. The Engine - MIT's tough-tech fund - has backed 50+ companies tackling nuclear fusion, advanced materials and quantum computing.
Enterprise SaaS has a distinct Boston profile
HubSpot (marketing automation), Toast (restaurant POS), Klaviyo (eCommerce CRM), DraftKings (fantasy/betting), Wayfair (furniture marketplace) and Snyk (developer security) all built from Boston. The city punches above its weight in B2B SaaS with vertical-market and developer-tools companies.
Kendall Square, Seaport and the CIC anchor three clusters
Kendall Square in Cambridge is the biotech, deeptech and MIT spin-out cluster. The Seaport District hosts the city's SaaS, fintech and consumer-tech companies in purpose-built innovation campuses. The Cambridge Innovation Center (One Broadway, CIC Boston) is the co-location point for early-stage companies across all sectors.
MIT, Harvard and Northeastern feed a deep talent pipeline
MIT, Harvard, Northeastern, Boston University and Tufts collectively produce more engineering and life-sciences PhDs than any comparable metro. Northeastern's co-op programme supplies a steady flow of engineering talent to Series A and B companies. The city's hospital system - Mass General, Brigham and Women's, Dana-Farber - feeds clinical and data-science talent into health and life-sciences startups.
Accelerators and angel networks active in Boston
Boston's accelerator landscape is anchored by MIT and Harvard programmes and has produced some of the most capital-efficient companies in the US. These are the most active programmes for venture-backed founders at pre-seed and seed.
MIT delta v
MIT delta v is MIT's flagship student and alumni accelerator, running an intensive summer cohort culminating in a live pitch to Boston's top institutional investors. Alumni include Formlabs, Tidepeak and Tulip Interfaces. No equity taken by MIT.
Harvard Innovation Labs
Harvard Innovation Labs runs accelerator programmes across the Business School, Medical School and Law School. Provides co-working, mentorship and $25k–$150k in grants to student and alumni ventures. Portfolio includes Curebase, Pillar VC alumni companies and several life-sciences spin-outs.
MassChallenge
MassChallenge is headquartered in Boston and runs the largest zero-equity accelerator in the world. Awards over $1M in cash annually across health, fintech, cleantech and consumer cohorts. Portfolio companies have raised $7B+ in funding and created 65,000+ jobs globally.
Techstars Boston
Techstars Boston is one of the original Techstars programmes, active since 2009. Sector-agnostic with a strong enterprise SaaS and healthtech track record. Standard $120k investment for 6% equity with a 13-week mentor-led cohort.
The Engine
The Engine is MIT's tough-tech fund and accelerator, backing companies with 10–20 year development timelines in nuclear, quantum, advanced materials, climate and biotech. Raised $300M+ across two funds. Portfolio includes Commonwealth Fusion Systems, Snapdragon Chemistry and Via Separations.
Greentown Labs
Greentown Labs is the largest climatetech incubator in the US, based in Somerville and Houston. Hosts 100+ startups with prototyping labs, a hardware workshop and a corporate innovation programme. Portfolio includes Ambient Photonics, Gradiant and PolyJoule.
Boston startup accountants vs Flow fractional CFO
Most Boston startups work with a CPA firm for federal and state tax, payroll and audit. That role is essential - but it is not the same as having a fractional CFO.
Federal and Massachusetts state tax, payroll, audit and R&D tax credits. The firms most used by Boston venture-backed startups.
- AAFCPAs
Boston-headquartered firm with a dedicated early-stage and venture-backed company practice. Known for serving biotech, SaaS and innovation companies from seed through Series C, including SBIR grant accounting.
- Wolf & Company
Top-100 US firm headquartered in Boston since 1911. Strong technology and innovation practice serving venture-backed software companies, fintech and financial institutions across New England.
- CBIZ (formerly Tofias)
National firm with a Boston office that absorbed the locally respected Tofias practice. Covers enterprise-level assurance, tax and consulting for middle-market and growth-stage tech companies.
- BDO Boston
Top-six US firm with a large Boston presence. Strong life-sciences and technology audit and advisory practice, covering Series B companies through pre-IPO and public company readiness.
- BlumShapiro (now Wipfli)
New England's largest regional accounting firm, now part of Wipfli. Deep roots in Boston's manufacturing, technology and professional-services sectors with a growing venture-backed client base.
Financial modelling, FP&A and fundraise prep. We work alongside your accountant - not instead of them.
- Builds the financial model - revenue assumptions, headcount, unit economics, runway.
- Sets up the monthly FP&A cycle: budget, forecast vs actual, variance analysis.
- Puts together the monthly board pack - P&L, cash, KPIs and forward outlook.
- Prepares the fundraise: investor model, deck financials, data room and diligence prep.
- Keeps the cap table tidy and handles stock option grants and 409A valuations.
- Reports on the KPIs that move the business - ARR, gross margin, CAC payback, retention.
- Pressure tests hiring, pricing and big spend decisions against the model before the founder commits.
- Sits in board meetings and is embedded week-to-week, not just engaged annually for compliance.
We provide fractional CFO services across Boston and beyond
Simple pricing
No hidden costs, no complicated long-term contracts. We understand how important flexibility is for Boston startups.
Per month
- Accounting / FP&A tech stack implementation
- Monthly financial statements and reporting pack
- Quarterly board pack with detailed financial analysis (with variance analysis vs. budget, relevant KPI observations etc.)
- Investor-friendly output
Per month
- Everything in Core, plus
- Operating model (via an online platform like Runway or Excel-based)
- Ongoing model maintenance, refining projections, burn/runway management
- Customer cohorts modelling, churn and retention analysis
- LTV / CAC, unit economics analysis
- Cap table management
Per month
- Everything in Grow, plus
- M&A / fundraising support; review of business plan
- Pitch deck preparation
- Investor approach strategy / list building
- Due diligence support and deal negotiation
- Valuation as required and free access to Multiples Pro
Packages shown are illustrative, final pricing is tailored to client requirements.
Recently completed fractional CFO projects
Selected fractional CFO engagements and prior CFO experience.
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