Mercury vs Relay vs Brex vs Novo: Best Business Bank for SaaS Startups
The right business bank account for your SaaS or software startup isn't just about managing money; it's about setting up for growth, investor relations, and efficient operations. With recurring revenue, developer payroll, and potential funding rounds, your banking needs are specific. We cut through the noise, comparing four top fintech options: Mercury, Relay, Novo, and Brex. Choosing well saves time, reduces fees, and avoids future headaches as your platform scales.
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The Quick Answer
Mercury for funded SaaS startups that need high FDIC coverage for investor capital, a clean API to integrate with revenue tools, and robust treasury features for managing burn rate. Relay for SaaS businesses wanting clear budget separation for dev, marketing, and sales teams, plus easy bookkeeper collaboration for recurring revenue. Novo for solo SaaS founders and mobile app publishers focused on fast setup and seamless integrations with payment processors like Stripe or Paddle. Brex for venture-backed software companies needing corporate cards, banking, and expense management in one platform as their team and expenses grow.
Side-by-Side Breakdown
Mercury: $0/month. FDIC coverage $250K standard, $5M+ through sweep network (critical for Series A and B rounds). Best features: treasury management for large cash balances, API for integrating with subscription billing platforms like Chargebee or Stripe, team permissions for finance/ops. Best for funded SaaS companies. Relay: $0/month (Pro $30/month). FDIC coverage $3M through program. Best features: up to 20 checking accounts (e.g., for AWS costs, developer payroll, marketing spend), bookkeeper seats for easier reconciliation of SaaS subscriptions, team cards for department leads. Best for SaaS businesses with detailed budget needs. Novo: $0/month. FDIC $250K. Best features: fast setup, Stripe/Paddle/Shopify integrations (for B2C SaaS or mobile app purchases), invoicing for early B2B clients. Best for MVP development and initial customer acquisition. Brex: $0 basic, varies for full platform. FDIC $6M+ through sweep. Best features: corporate cards for sales teams, expense management for engineers traveling to conferences or purchasing dev tools, reimbursements for remote team members. Best for venture-backed teams scaling quickly.
When to Choose Mercury
Mercury is the default for funded SaaS and tech founders. The interface is excellent for managing high cash balances from seed or Series A rounds. The treasury sweep gives FDIC coverage well above $250K, which is crucial when your investor funds exceed standard limits. API access lets you build custom financial workflows, like pulling data into your revenue operations dashboard or integrating directly with platforms like Stripe or Chargebee for automated reporting. If you have venture capital investors, Mercury is often what they expect to see and understand, simplifying financial due diligence and discussions about runway.
When to Choose Relay
Relay is built for SaaS operators who need to track expenses by department or project. You can open up to 20 checking accounts – one for R&D/developer salaries, one for AWS/Azure server costs, one for marketing campaigns, one for sales commissions, and one for taxes. This makes managing your burn rate and unit economics clearer and helps you stick to budgets. Great for SaaS businesses using 'Profit First' principles for cash allocation. The bookkeeper seat feature is also excellent for external accountants reconciling complex recurring revenue streams and subscription expenses.
When to Choose Novo
Novo is the fastest to open and most straightforward for early-stage, bootstrapped SaaS founders or mobile app developers. If you're building an MVP, acquiring your first users via App Store or Google Play, or running early B2B pilots with Stripe or Paddle, Novo's integrations simplify reconciliation of those payments. Genuinely free with no minimum balance, making it ideal before significant funding. It's perfect for solo founders managing initial cloud hosting costs or modest marketing spend. Limitation: less robust than Mercury for managing scaling teams or large investor funds from Series A rounds.
When to Choose Brex
Brex makes sense when your SaaS company has a growing team (5-50+ employees) generating significant expense volume. If your sales team needs corporate cards for client lunches or travel to conferences like Dreamforce or SaaStr, your developers are buying software licenses or attending workshops, or your marketing team is running ad campaigns, Brex provides corporate cards, expense management, and banking in one platform. It's most compelling for venture-backed companies managing aggressive growth and a high burn rate, needing clear visibility into spend. For a solo founder, the complexity is too much – start with Mercury or Novo and graduate when managing developer and sales team expenses becomes a real bottleneck.
The Verdict
Mercury for most funded or rapidly scaling SaaS startups needing sophisticated treasury and API features. Relay for SaaS operators who need precise departmental budgeting and clear cash flow management for recurring revenue. Novo for solo founders building an MVP or early B2C app due to its quick setup and payment processor integrations. Brex when your team is growing, and managing corporate cards and developer expenses is a primary concern. All four are free to open initially – you can switch later, but consolidating payment details for AWS, Google Cloud, Salesforce, HubSpot, and other SaaS vendors across your new bank account is a significant hassle worth avoiding.
How to Get Started
All four open online in minutes. You will need your EIN, LLC or C-Corp formation documents, and a government ID. Mercury and Relay sometimes have a short review period, especially for venture-backed entities or those with complex structures. Novo is typically the fastest for solo founders. Apply with the bank that fits your SaaS company's current funding and operational stage. Don't overthink it at first, but do pick one that supports your specific growth trajectory.
RECOMMENDED TOOLS
Mercury
Best business banking for funded startups and tech founders
Relay
Multi-account banking built for budget management and bookkeeper collaboration
Novo
Fast setup with Stripe, Square, and Shopify integrations
Brex
Banking, corporate cards, and expense management for venture-backed teams
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FREQUENTLY ASKED QUESTIONS
Are these real banks or fintech apps?
They are fintech companies that partner with FDIC-member banks to hold your deposits. Your deposits are FDIC-insured, but you are not banking directly with a chartered bank.
Can I use one of these and also keep a traditional bank account?
Yes. Many founders use Mercury or Relay as their primary operating account and keep a local credit union or Chase account for in-person cash deposits.
What if I am not approved?
Mercury and Relay can decline applications, often due to business type or state restrictions. Novo is generally more permissive. If declined, try another option or use a traditional bank while you build account history.
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