Unit vs Stripe Treasury vs Treasury Prime: BaaS for SaaS

Software companies are becoming banks. Not literally, but the line between a SaaS platform and a financial institution blurs more every quarter. Vertical SaaS products in construction, healthcare, logistics, and real estate are embedding bank accounts, card issuing, and money movement directly into their platforms. The result: higher revenue per user, stickier products, and margins that pure software companies envy.

Banking-as-a-Service (BaaS) providers make this possible by sitting between your software and a chartered bank. They handle the regulatory complexity, the ledger infrastructure, and the bank partnerships so you do not need a banking charter to offer banking products. But the three leading platforms, Unit, Stripe Treasury, and Treasury Prime, take very different approaches to the problem. Choosing the wrong one can cost you six months of engineering time and hundreds of thousands of dollars in compliance overhead.

This guide compares all three on the dimensions that actually matter: compliance burden, time-to-market, supported products, pricing, and bank partnership models. We have helped SaaS companies build fintech products on each of these platforms, and the differences are significant.

Before diving into comparisons, it helps to understand what each platform is and who built it.

Unit

Unit launched in 2019 and has raised over $100M to build what it calls the "fastest way to embed financial features into your product." Unit provides a single API layer that connects to its partner bank (currently Piermont Bank, with Blue Ridge Bank as an additional partner). You get FDIC-insured deposit accounts, debit card issuing via Marqeta, ACH transfers, wire transfers, check deposits, and a real-time ledger out of the box. Unit targets startups and growth-stage companies that want to go live quickly. Their sweet spot is companies with fewer than 50 engineers that want a turnkey solution.

Stripe Treasury

Stripe Treasury, launched in 2020, is Stripe's embedded banking product. It extends the Stripe ecosystem so platforms already using Stripe Connect can offer financial accounts to their connected accounts (sellers, contractors, service providers). Treasury works with Goldman Sachs (via its bank subsidiary) and Evolve Bank & Trust. If you are already deep in the Stripe ecosystem with Connect, Payments, and Billing, Treasury is designed to feel like a natural extension of that stack. It supports FDIC-insured accounts, ACH, and domestic wires.

Treasury Prime

Treasury Prime takes a fundamentally different approach. Rather than partnering with one or two banks, Treasury Prime has built a network of 12+ bank partners across the United States. This gives you access to the broadest range of banking products and the ability to choose a bank partner that fits your specific compliance profile. Treasury Prime works with banks like Grasshopper Bank, Blue Ridge Bank, and First Internet Bank, among others. The platform is the most flexible of the three but also the most complex to integrate.

Compliance is the single biggest factor that separates BaaS platforms, and it is the area where most SaaS companies underestimate the work involved.

Unit: Compliance Mostly Handled for You

Unit takes on the heaviest compliance lift of the three providers. Their platform includes built-in KYC/KYB (Know Your Customer/Know Your Business) identity verification, OFAC screening, transaction monitoring, and suspicious activity reporting. Unit's compliance team works directly with Piermont Bank to manage the BSA/AML (Bank Secrecy Act / Anti-Money Laundering) obligations on your behalf. You still need your own compliance policies and procedures, but Unit provides templates and guidance.

The practical impact: a startup with no in-house compliance team can get through bank approval and go live. Unit estimates 4 to 8 weeks from contract signing to production access, though in our experience 6 to 10 weeks is more realistic once you factor in compliance review iterations.

Stripe Treasury: Compliance Within the Stripe Framework

Stripe Treasury leverages Stripe's existing compliance infrastructure, including Stripe Identity for KYC and Stripe's internal AML monitoring. Because Treasury runs through Stripe Connect, your connected accounts are already subject to Stripe's onboarding and verification requirements. The incremental compliance burden for adding Treasury on top of an existing Connect integration is moderate.

However, Stripe Treasury requires you to be an approved Stripe Connect platform first, and Goldman Sachs and Evolve have their own due diligence requirements on top of that. Approval timelines vary. Some platforms report 2 to 3 months from application to production access. Stripe is selective about which platforms get access to Treasury, and high-risk verticals (cannabis, crypto, gambling) are generally excluded.

Treasury Prime: You Own More of the Compliance Stack

Treasury Prime gives you the most flexibility, which also means you carry more compliance responsibility. Because you can choose from multiple bank partners, each with different risk appetites and regulatory requirements, the compliance conversation is more nuanced. Treasury Prime provides APIs for KYC/KYB and transaction monitoring, but the banks expect you to have a more mature compliance program than what Unit or Stripe require.

Many Treasury Prime customers hire a dedicated compliance officer or engage a compliance consulting firm (expect $5K to $15K/month for outsourced compliance). The bank onboarding process typically takes 3 to 6 months, sometimes longer for novel use cases. This is not a platform for companies that want to move fast without compliance resources.

The range of financial products you can offer depends heavily on which BaaS provider you choose.

Deposit Accounts

Unit: FDIC-insured checking and savings accounts with individual and business account types. Sub-accounts and virtual accounts supported. Real-time balance updates through their event-driven architecture. Unit's ledger is one of the cleanest we have worked with.

Stripe Treasury: FDIC-insured financial accounts (Stripe calls them "FinancialAccounts") tied to Stripe Connect accounts. Designed primarily for business accounts on platforms. Individual consumer accounts are more limited. Treasury accounts integrate tightly with Stripe Payments, so incoming payments can flow directly into Treasury balances.

Treasury Prime: The widest variety of account types, including checking, savings, CD-like products, and escrow accounts depending on the bank partner. Some bank partners support interest-bearing accounts with competitive yields. If you need a specific account structure, Treasury Prime is the most likely to accommodate it.

Card Issuing

Unit: Physical and virtual debit cards issued through Marqeta. Supports real-time authorization controls, spending limits, merchant category restrictions, and custom card designs. Card programs can launch in 2 to 4 weeks after account setup. This is one of Unit's strongest features.

Stripe Treasury: Stripe Issuing is a separate product from Treasury, but they integrate well together. Stripe Issuing supports virtual and physical cards with spend controls, real-time authorizations, and custom card programs. If you are using Treasury for accounts and Issuing for cards, the two products share a unified API experience.

Treasury Prime: Card issuing is available through partnerships with processors like Marqeta, Galileo, or i2c. Treasury Prime does not have its own card issuing product. You integrate with the card processor separately, which adds complexity but also gives you more flexibility in choosing your card program manager.

Lending

Unit: Unit offers a charge card product and has been expanding into lending APIs. Loan origination is available for select partners, but it is still less mature than their core banking products.

Stripe Treasury: No native lending product. Stripe Capital exists as a separate product for Stripe merchants, but it is not available as an embedded lending API for platforms to offer to their users.

Treasury Prime: The strongest lending capabilities of the three. Multiple bank partners offer loan origination, lines of credit, and commercial lending products through the Treasury Prime API. If embedded lending is a core part of your product roadmap, Treasury Prime is the clear leader.

Moving money between accounts is the core utility of any BaaS platform. The speed, cost, and reliability of money movement vary significantly across providers.

ACH Transfers

All three platforms support ACH, but the details differ. Unit processes same-day ACH with funds typically available within one business day. Stripe Treasury supports ACH debits and credits, with standard processing timelines of 2 to 3 business days for standard ACH and same-day ACH available for an additional fee. Treasury Prime's ACH capabilities depend on the bank partner, but most support both standard and same-day ACH with competitive settlement timelines.

Wire Transfers

Unit supports domestic wires with same-day settlement. International wires are available through select configurations. Stripe Treasury supports domestic wires natively, with funds arriving same-day when initiated before the bank's cutoff time (usually 2:00 PM ET). International wires are not currently supported through Treasury. Treasury Prime offers both domestic and international wires through most bank partners, giving it the broadest wire transfer capability.

Real-Time Payments (RTP) and FedNow

This is where the landscape is shifting fast. Unit has rolled out RTP support, allowing instant money movement 24/7/365. Stripe Treasury has been adding real-time payment capabilities, though availability depends on the underlying bank partner. Treasury Prime, because of its multi-bank model, offers RTP and FedNow through select bank partners. If instant payments are critical to your product, check the specific bank partner's capabilities on each platform.

Book Transfers

Transfers between accounts on the same platform (book transfers) are instant and free on all three platforms. This matters for marketplaces and platforms where money moves between users frequently. Unit's real-time ledger makes book transfers particularly fast, with balance updates reflected in milliseconds.

Pricing in BaaS is notoriously opaque. None of the three providers publish simple rate cards, but here is what we have seen across multiple client engagements.

Unit Pricing

Unit charges a combination of monthly platform fees and per-transaction fees. Expect a platform fee starting around $2,000 to $5,000/month at the entry tier, scaling up with volume. Per-transaction fees: ACH transfers typically $0.25 to $0.50, wire transfers $3 to $5, card transactions are a percentage of interchange shared with Unit. The revenue share model means Unit takes a portion of the interchange income your card program generates. For a company processing $5M/month in card volume, interchange revenue can be $75K to $150K annually, and Unit's share of that is negotiable.

Stripe Treasury Pricing

Stripe Treasury pricing integrates into the broader Stripe fee structure. There is no separate monthly platform fee if you are already on Stripe Connect. Treasury-specific costs include per-transaction ACH fees ($0.50 to $1.00 depending on direction), wire fees ($5 to $8), and a basis-point fee on account balances. Stripe also takes a share of interchange on Issuing card transactions. The advantage: if you are already paying Stripe's Connect and Payments fees, the incremental cost of Treasury is relatively low. The disadvantage: the total Stripe bill across all products can add up quickly.

Treasury Prime Pricing

Treasury Prime's pricing is the most variable because it depends on which bank partner you choose. Platform fees range from $3,000 to $10,000/month. Per-transaction fees are generally competitive with Unit. The key difference: Treasury Prime's bank partners may offer more favorable interchange sharing arrangements, and some banks are willing to share interest income on deposits. For companies with large deposit bases (over $50M), the interest income alone can offset the platform costs.

Time-to-Market Comparison

• Unit: 6 to 12 weeks from contract to production. Fastest time-to-market of the three. Best for companies that want to launch an MVP banking product quickly.
• Stripe Treasury: 8 to 16 weeks, assuming you are already on Stripe Connect. Add 4 to 6 weeks if you need Connect integration first. Best for companies already in the Stripe ecosystem.
• Treasury Prime: 12 to 26 weeks. The longest timeline, driven by bank partner selection and compliance review. Best for companies with complex requirements that need specific bank capabilities.

Bank Partnership Models

This is one of the most important and least discussed differences. Unit and Stripe Treasury assign you to a specific bank partner with limited choice. If Piermont Bank's risk appetite does not align with your use case, Unit may not be an option. If Goldman Sachs or Evolve rejects your application, Stripe Treasury is off the table.

Treasury Prime's multi-bank model solves this. Their team helps you find a bank partner whose risk appetite, product capabilities, and pricing align with your specific business. This is particularly valuable for companies in regulated verticals like healthcare or real estate, where bank risk tolerance varies significantly.

After building embedded banking products on all three platforms, here is our honest recommendation.

Choose Unit if: You are a seed-to-Series B startup that wants to launch banking features as fast as possible. You have a small engineering team (under 20 developers) and no in-house compliance staff. You want card issuing as a core feature. You are building a neobank, a vertical SaaS product with embedded accounts, or a payroll/expense management tool. Unit's developer experience is the best of the three, and their support team is responsive. For most startups, Unit is the right default. If you are exploring this path, our guide on how to build a neobank app covers the full architecture.

Choose Stripe Treasury if: You are already a Stripe Connect platform and want to add banking features for your connected accounts. You need deposit accounts and money movement but not necessarily card issuing as the primary feature (though Stripe Issuing can handle that separately). You want a single vendor relationship for payments, billing, and banking. You value the stability of Stripe as a company and its Goldman Sachs bank partnership. The tight integration between Treasury, Connect, and Payments is a genuine competitive advantage that the other two platforms cannot replicate.

Choose Treasury Prime if: You need maximum flexibility in bank partner selection. You are in a regulated vertical where bank risk appetite matters. You want embedded lending as a core product. You have a compliance team (or budget for one) and can manage a longer onboarding timeline. You are processing significant deposit volumes where interest income sharing becomes meaningful. Treasury Prime is the right choice for later-stage companies with complex requirements and the resources to manage a more involved integration.

The Hybrid Reality

Some companies start on Unit for speed, then migrate specific products to Treasury Prime as they scale and need more flexibility. Others use Stripe Treasury for deposit accounts and a separate card issuing partner. The BaaS landscape is modular enough that you do not have to commit to a single provider forever. But switching costs are real. Plan for 3 to 6 months of migration work if you outgrow your initial platform. For a broader view of how payment infrastructure fits into your product, see our payment provider comparison.

Implementation Costs

• Unit basic integration (accounts + cards): $25K to $60K (6 to 12 weeks)
• Stripe Treasury on existing Connect: $15K to $40K (8 to 14 weeks)
• Treasury Prime full integration: $40K to $100K (12 to 26 weeks)
• Compliance setup and consulting: $10K to $30K (ongoing $5K to $15K/month)
• Card program design and launch: $10K to $25K (4 to 8 weeks)

Embedded banking is one of the highest-ROI features a SaaS company can build, but only if you choose the right infrastructure from the start. We help companies evaluate BaaS providers, design their banking product architecture, and build production integrations. Book a free strategy call to discuss which platform fits your product and timeline.