Bridges vs. Attivo: Choosing Fractional CFO for B2B SaaS Company
Attivo offers full-stack outsourced finance — bookkeeping, controller, and CFO — for growth-stage companies across sectors. Bridges partners are operators who have built and grown B2B SaaS companies themselves. We're purpose-built for vertical SaaS with revenue complexity — payments, usage-based billing, hybrid GTM — where generalist advice is calibrated to a business you're not running.
Attivo's team model works well when full-stack coverage is the goal. Bridges fits when the strategic questions — which bets to make, which hires to sequence, whether the revenue model actually works at scale — are the hard ones.
Choose Attivo for full-stack coverage. Choose Bridges for operator depth in B2B SaaS.
Attivo is the right choice if you need a single vendor covering accounting and fractional CFO through a team-based model, your business model is relatively conventional, and vertical specialization isn't a priority. Bridges is right if you run a B2B SaaS company with payments, usage-based billing, or complex vertical market dynamics — and your biggest finance challenge isn't accurate books. It's whether you're making the right calls with your runway. The decision hinges on whether you need coverage or calibration.
How Attivo Works
Attivo positions itself as a full-service outsourced finance solution for growth-stage companies, with services spanning bookkeeping, controller work, and fractional CFO engagements. Their model is built around a team approach: a dedicated controller manages day-to-day accounting operations while a fractional CFO provides strategic guidance at the cadence the business needs.
Attivo works across sectors — SaaS, professional services, e-commerce — without deep vertical specialization. The strength of the model is coverage: founders get the accounting layer and the strategic layer from one vendor. The limitation is depth: a generalist firm serving multiple verticals can't calibrate advice to the specific economics of any one of them. Benchmarks are built for average growth companies, not for vertical SaaS platforms with payments layers or usage-based billing.
Pricing is not publicly available; engagements are scoped after an initial call.
- ✓Growth-stage companies that need accounting and CFO from one vendor
- ✓Founders who want a team model for continuity
- ✓Businesses with conventional revenue models across any sector
- ✓Companies where full-stack coverage matters more than vertical depth
- △No vertical specialization — benchmarks calibrated to generic growth companies
- △Advice may not fit payments, usage-based billing, or complex revenue mechanics
- △Strategy layered on top of accounting, not leading the engagement
- △Pricing not published; scope determined after initial call
How Bridges Works
Bridges is built around a premise: a CFO who has never run a business can tell you what your bets cost — but not which bets to make. Our partners have spent 20+ years as operators inside fast-growing software companies. We've scaled B2B SaaS businesses from $5M to $50M and been through exits. That experience changes the calibration of the advice we give.
We serve B2B SaaS companies at $3M–$30M ARR. Our best work is for vertical SaaS platforms with complex revenue: payments layers, usage-based billing, enterprise contracts, and hybrid GTM models. These businesses have unit economics that generic SaaS frameworks simply don't capture. If your CFO is applying standard benchmarks to a payments-enabled platform, they're giving you advice built for a company you're not running.
Engagements start with a strategy session, not an onboarding checklist. We fix the financial infrastructure — your accounting stack, CRM, HRIS, spend tools — before we build reporting on top of it. We track leading indicators six to twelve months before they matter. We're fully operational within 30 days. And we tell you what we actually think — with the argument and the data, not a disclaimer.
- ✓B2B SaaS at $3M–$30M ARR in vertical markets
- ✓Companies with payments, usage-based billing, or hybrid revenue
- ✓Founders who want a strategic operating partner, not a report
- ✓Teams that need systems fixed at the source, not just documented
- △Not the right fit if bookkeeping and tax compliance is the primary need
- △Pre-revenue companies aren't our best-fit stage
- △We're not a full-stack accounting vendor — we lead with strategy
Bridges vs. Attivo: Side by Side
How the two firms compare across the dimensions that matter most at $3M–$30M ARR.
| Attivo | Bridges | |
|---|---|---|
| Primary positioning | Full-stack outsourced finance, growth-stage | Strategic finance for B2B SaaS |
| Target audience | General growth-stage companies, any sector | ✓ B2B SaaS with complex revenue models |
| Strategy-first approach | Partial — accounting leads, CFO advises | ✓ Starts with your 3–5 year plan |
| Real-time reporting | — Monthly close | ✓ Forward-looking, not post-close |
| Fixes systems at source | Limited — reports the numbers | ✓ Fixes the source, then builds reports |
| Team model | ✓ Dedicated controller + fractional CFO | Senior partner-led; embedded in your team |
| Pricing | Not published; scoped after initial call | Engagements from $4,750; ongoing support $5K–$15K/mo depending on scope |
| Minimum commitment | Varies; scoped per engagement | Flexible; project-based where it makes sense |
| Time to steady state | 2–4 months | Fully operational within 30 days |
| Best stage | Growth-stage, any sector | $3M–$30M ARR, B2B SaaS |
How Collectly Built Finance Operations in 90 Days That Unlocked 100%+ Revenue Growth
Collectly closed a $25M Series A with capital to deploy and no finance infrastructure to deploy it wisely. In 90 days, Bridges built billing workflows, real-time reporting, and a full forecasting infrastructure — giving leadership the tools to invest with confidence instead of caution. That foundation became the system Collectly used to grow 3× over the next two years.
Read the case study →Which Is Right for Your Stage?
Choose Attivo if…
- →You need accounting and fractional CFO from a single vendor
- →You want a team model with a dedicated controller
- →Your business model is conventional and doesn't require vertical depth
- →Full-stack outsourced finance is the primary gap to fill
- →You're at growth stage across any sector
Choose Bridges if…
- ✓You run a B2B SaaS company at $3M+ ARR in a vertical market
- ✓Your revenue includes payments, usage-based billing, or hybrid models
- ✓The strategic questions are harder than the bookkeeping
- ✓You want a partner who's built the kind of company you're building
- ✓You need systems fixed at the source, not just reported on
Common Questions
What is the difference between Attivo and Bridges for a SaaS company?+
Does Attivo have expertise in usage-based billing or payments?+
How is Bridges different from other fractional CFO firms for vertical SaaS?+
When does a B2B SaaS company need a fractional CFO instead of a bookkeeper?+
Talk to a partner, not a sales rep
A 15-minute call is enough to tell you which firm is actually right for your stage and model. If Attivo is the better fit, we'll say so.