Everyone loves a startup (aka challenger bank), especially when they have a compelling story. However, when it comes to trusting someone with your money, many small business owners prefer to deal with companies embedded in the local economy, even if it means not getting the latest online banking features or the best interest rate. The list below are the biggest national brands offering small business banking services. There are also thousands of community banks and credit unions to choose from as well.

If you don’t need a local presence, are are primarily wanting the best online and mobile services, refer digital challenger bank list (here). For more info on choosing a small business bank, see our previous post.


Challenger of the Month*

Mercury Bank

Banking for what you’re building. Startups of all sizes rely on Mercury.

Apply in just 10 minutes!

HQ: SF  |  Founded: 2017  |  Raised $136M (including $120M in 2021)  |  Valuation: $1.7 billion | Website visits: 2.2 million/month  | Employees: 728  |  Article citations: 20  |  Linkedin: 37,000 followers | Trustpilot: 3.9 (822 reviews) | iOS app: 4.9 (3,800 reviews)


Resources: Looking for digital banks, lenders, payment providers, insurance or digital accounting for small businesses? Check out our latest lists: Small Business (SMB) savings/treasury accounts (7) | SMB online lenders (33) | SMB challenger banks (15) | SMB insurers (15) | SMB charge cards/expense management (16) | Billpay & invoicing (16)Payment processors (7) | Subscription processors (7) | SMB digital accounting/bookkeeping (21)


Table: Largest Traditional Branch Banks & Card Issuers Serving U.S. Small Businesses
ranked by monthly website visits

Web
Traffic (M)
Assets
($ Billions)
Rank Company July 25 Jan 25 Oct 24 30 June ’25 30 Sep ’23
1 Chase 192 182 179 $3,790 $3,390
2 Citibank 135 99 116 $1,830 $1,660
3 CapitalOne 133 145 133 $649 $469
4 Bank of America 113 114 111 $2,670 $2,470
5 Wells Fargo 99 99 99 $1,740 $1,700
6 TD Bank 46 13 13 $356 $366
7 US Bank 29 27 27 $671 $657
8 PNC Bank 28 24 24 $555 $553
9 BMO 26 25 24 $254 $261
10 Truist 22 20 21 $536 $535
11 Navy FCU 20 21 18 $168
12 Huntington Bank 12 9.1 8.7 $207 $186
13 Regions Bank 11 11 9.7 $158 $153
14 Fifth Third Bank 9.8 10 9.0 $209 $212
15 Citizens Bank 7.9 9.0 7.2 $218 $225
16 M&T Bank 7.9 8.3 7.5 $211 $209
17 Key Bank 6.1 7.8 6.2 $182 $186
18 BECU 4.0 4.6 4.0 $29
19 First Citizens 3.6 4.0 3.5 $229 $214
20 Santander Bank 3.2 3.3 3.1 $103 $102
21 First Horizon 2.8 2.6 3.2 $82 $82
22 Mercury Bank 2.6 2.4 2.1
23 America First CU 2.2 2.3 2.1 $18
24 Comerica 2.0 2.0 2.4 $78 $86
25 Flagstar Bank 1.9 2.8 2.7 $92 $111
26 Umpqua Bank 1.5 1.6 1.8 $52 $52
27 Frost Bank 1.4 1.3 1.2 $51 $49
28 First Tech FCU 1.2 1.1 $17
29 Zions Bank 1.1 1.3 1.0 $89 $87
30 Synovus 1.1 1.3 1.3 $61 $59
31 Old National Bank 1.1 1.1 $71 $49
32 HSBC (USA) 1.0 1.1 1.0 $170 $163
Cards/Payments
1 PayPal 504 341 405
2 Shopify 177 157 115
3 American Express 99 84 88 $212 $175
4 Stripe 92
5 Square 42 50 40
6 Ramp 3.1

Source: FintechLabs, 7 Sep 2025; SimilarWeb, Federal Reserve

Website traffic is total monthly visits according to Similarweb.
Bank assets in US$ billions as of 30 June 2025 per US Federal Reserve, CU Assets as of 31 Dec 24

*FintechLabs is sponsor-supported; companies buying ads or paying referral fees may receive prominent mention