Money and cash flow are the lifeblood of a small business. And it’s an area often overlooked by traditional online banking providers. So a number of fintech companies have emerged during the past decade-plus to better serve SMB needs. Most providers operate on a dual revenue model which includes:
a.) monthly subscription fees to create predictable recurring revenue
b.) transaction fees to cover interchange and other variable processing costs.

Sponsored

We divided the payment providers into four categories:

  1. Charge card & expense management (see the list)
  2. Bill payments and/or invoicing specialists (see below)
  3. Payment processors (See the list)
  4. Subscription management platforms (See the list)

Unlike other fintech areas, 7 of the top 10 providers are at least 15 years old. And none of the 22 started in the past 6 years.

Year founded: 2000 to 2009 >>> 8   |   2010 to 2014 >>> 6   |   2015 to 2019 >>> 8    |   2020 or later >>> 0

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 credit cards/expense management (16) | Billpay & invoicing (16)| Payment processors (7) | SMB digital accounting/bookkeeping (21)

The FAB Score (Fintech Attention Barometer) is a proxy for the size and growth of fintech companies founded since 1999. 

Top U.S. BillPay & Invoicing Startups (ranked by FAB score***)

Rank Was (8/25) Company FAB Score** Review Founded HQ Total Funding ($M)*** Visits (Jan’26)
Ad Ad Quickbooks (Intuit) NA 19 Feb 26 1983 SF 16,900,000
1 1 Rippling Spend 2831 19 Feb 26 2016 SF $2,437 9,300,000
Ad Ad Bill.com 922 19 Feb 26 2006 SF 496 4,300,000
2 2 Wave Payments (HR Block) 1285 19 Feb 26 2009 Toronto 80 6,400,000
3 4 Airwallex 1159 19 Feb 26 2015 Singapore 1202 4,400,000
4 3 Bill.com 922 19 Feb 26 2006 SF 496 4,300,000
5 5 Freshbooks 638 19 Feb 26 2003 Toronto 457 2,700,000
6 6 Tipalti 471 19 Feb 26 2010 SF 915 1,100,000
7 7 Tradeshift 320 19 Feb 26 2009 SF 1100 190,000
8 8 Melio 248 19 Feb 26 2018 NYC 654 490,000
9 9 AvidExchange 159 19 Feb 26 2000 Charlotte, NC 1100 85,000
10 12 Bonsai 99 19 Feb 26 2016 SF 0 490,000
11 11 Emburse (ChromeRiver≥) 91 19 Feb 26 2014 LA 0.1 460,000
12 13 Stampli 83 19 Feb 26 2015 SF 147 200,000
13 10 Vcita 81 19 Feb 26 2010 Seattle 15 420,000
14 14 Autobooks 60 19 Feb 26 2015 Detroit 153 93,000
15 15 BillerGenie 51 19 Feb 26 2018 Miami 11.5 230,000
16 16 Plastiq 49 19 Feb 26 2012 SF 142 160,000
17 (tie) 17 PaySimple 44 19 Feb 26 2006 Denver 145 160,000
17 (tie) 19 Plooto 44 19 Feb 26 2015 Toronto 26 200,000
19 18 Onlinecheckwriter 43 19 Feb 26 2008 SF 2.7 250,000
20 20 InvoiceNinja 35 19 Feb 26 2014 Hefa, Israel 0 180,000
21 21 Invoice2go (Bill.com) 20 19 Feb 26 2002 SF 60 120,000
22 22 Routable 13 19 Feb 26 2017 Seattle 47 22,000
23 23 Beanworks 10 19 Feb 26 2012 Vancouver 12 54,000

Source: FintechLabs, 20 Feb 2026 with data from Crunchbase, SimilarWeb, SEMrush, Pitchbook, Linkedin; Employment and social data from Aug 2025

* FintechLabs receives advertising and/or affiliate revenue from the company
**As nerds do, we are developing a proprietary score measuring the adoption of digital financial services at private companies that do not release traditional metrics (# customers, deposits, AUM, etc). We call it the FAB score, standing for Fintech Attention Barometer. The score uses money raised, valuation and website traffic as a proxy for company size and velocity of growth. It’s a work in progress, so expect changes down the road.
***Funding is the amount invested into the company as either equity or debt.
Note: We may receive referrals from company’s listed. If it changes their ranking, we indicate that with “Ad”

Challenger Billpay & Invoicing Suppliers in the United States

Ad: Quickbooks Bill Pay (Intuit)
– HQ: Mountain View, CA
– Founded: 1983

Traction:
– Website visits (Jan 2026): 16.9M (SimilarWeb)

1. Rippling Spend
FAB Score = 2,830 (up 480 since Aug 2025)
– HQ: San Francisco
– Founded: 2009

Traction:
– Raised $2.4B  including $450M in May 2025, $790M in 2024, $500M in 2023 (Crunchbase)
– Website visits (Jan 2026): 9.3M (SimilarWeb)
– Employees: 3,630 (Pitchbook) unchanged from July

Social:
– LinkedIn:  306,000 followers (6,040 employees vs. 5,540 in July ’25)
– iOS rating: 4.7 (6,200 reviews vs. 4,500 in July ’25)
– Trustpilot: 4.6 (1,570 reviews vs 1,240 in July ’25)
– G2: 4.8 (10,030 reviews vs. 7,960 in July ’25)

2. Wave (acquired by H&R Block)
FAB Score = 1,290 (up 20)
– HQ: Toronto
– Founded: 2009

Traction:
– Raised $79.8M (Crunchbase)
– Exit: Acquired by H&R Block for US$400M in June 2019
– Website visits (Jan 2026): 6.4M (SimilarWeb)
– Employees: 303 (Pitchbook) vs 312 in July; 308 in Jan; 367 Sep ’24; 303 Jan ’24; 304 Aug ’23; 339 Mar ’23)

Social:
– LinkedIn:  22,000 followers (297 employees vs. 313 in July; 309 in Jan ’25; , 305 Sep ’24; 300 Jan ’24; 303 Aug ’23; 305 Mar ’23)
– iOS rating: 4.4 (6,300 reviews, up 200 since Jan)
– Rating: 4.4 ( 1,690 reviews per Software Advice, up 40 since Jan).

3. Airwallex
FAB Score = 1,160 (up 300)
– HQ: Singapore
– Founded: 2015

Traction:
– Raised: $1.5B including $630M in 2o25; $100M in 2022 (Crunchbase)
– Website visits (Jan 2026): 4.4M (SimilarWeb)
– Employees: 1,700 (Pitchbook, up 100 since Jan)

Social:
– LinkedIn: 124,000 followers (2,000 employees vs. 1,760 in July; 1,610 employees in Jan ’25; 1,370 in Sep ’24)

4. Bill (see also #21 Invoice2Go)
FAB Score = 922 (down 20)
– HQ: San Francisco Bay Area
– Founded: 2006

Traction:
– Raised $496M including $216M in its Dec 2019 IPO (Crunchbase)
– Annual revenue (TTM): $1.5B (Yahoo5
– Market Cap: $5.2B (NYSE: BILL 7 May ’25)
– Website visits (Jan 2026): 4.3M (SimilarWeb)
– Employees: 3,000 (Pitchbook) vs 2190 from since Jan to July ’25; vs 2,620 Jan ’24; 2,370 in Aug ’23

Social:
– LinkedIn: 68,000 followers (3,340 vs 3,320 in July; 3,180 in Jan ’25; 2,990 in Sep ’24; 2,930 in Jan ’24; 2,950 in Aug ’23)
– iOS rating: 4.9 (48,700 unchanged since July; 47,300 in Jan)
– Capterra: 4.2 (550 reviews vs. 541in July; 528 in Jan)

5. Freshbooks
FAB Score = 638 (unchanged)
– HQ: Toronto
– Founded: 2003

Traction:
– Raised $457 including $125M in 2025, $131M in 2021 and $125M in 2022 (Crunchbase)
– Website visits (Jan 2026): 2.7M (SimilarWeb)
– Employees: 454 (Pitchbook) unchanged since July; 571 in Jan

Social:
– LinkedIn: 90,000 followers (420 employees vs. 442 in July; 481 in Jan ’25; 588 in Sep ’24; 617 in Jan ’24; 664 in Aug ’23; 698 in Mar ’23)
– iOS rating: 4.7 (10,900 reviews, unchanged since Sep ’24)
– SoftwareAdvice rating: 4.5 ( 4,500 reviews, up 20 since Jan)

6. Tipalti
FAB Score = 471 (up 80)
– HQ: San Francisco
– Founded: 2010

Traction:
– Raised $915M including $200M (debt) in 2025; $150M (debt) in May 2023 & $270M in 2021 (Crunchbase)
– Valuation: $8.3B (based on Dec 2021 round)
– Website visits (Jan 2026): 1.1M (SimilarWeb)
– Employees: 1,351 vs. 1,355 in July; 1,310 in Jan ’25 (Pitchbook); 1,240 in Sep ’24; 1,050 in Jan ’24; 1,110 in Aug ’23; up 1,126 April ’23

Social:
– LinkedIn:  57,000 followers (1,310 employees vs. 1,350 in July; 1,320 in Jan ’24; 1,280 in Sep ’24; 1,110 in Jan ’24; 1,030 in Aug. ’23; up 1.010 in April ’23)
– G2 rating: 4.5 (334 reviews, up 128 since Jan)

7. Tradeshift
FAB Score = 320 (up 2)
– HQ: SF
– Founded: 2009

Traction:
– Raised $1.1B (Crunchbase)
– Website visits (Jan 2026): 190,000 (SimilarWeb)
– Employees: 501 employees (Pitchbook)

Social:
– LinkedIn: 73,000 followers (381 employees)
– G2 rating: 3.8 (212 reviews)

8. Melio
FAB Score = 248 (down 10)
– HQ: NYC
– Founded: 2018

Traction:
– Raised $654M including $150M in 2024, $360M in 2021 (Crunchbase)
– Website visits (Jan 2026): 490,000 (SimilarWeb)
– Employees: 669 employees (Pitchbook), vs 642 in July; 625 in Jan ’25; 618 in Sep ’24; 632 in Jan ’24; 602 in Aug ’23; 597 in April ’23)

Social:
– LinkedIn: 35,000 followers (684 employees vs. 656 in July; 625 in Jan ’25; 614 in Sep ’24; 646 in Jan ’24; 644 in Aug ’23; 597 in April ’23)
– Capterra rating: 4.2 (396 reviews vs. 391 in July; 383 Jan ’25)

9. AvidXchange  (acquired by TPG, May 2025)
FAB Score = 159 (down 99)
– HQ: Charlotte, NC
– Founded: 2000

Traction:
– Raised: $1.1B including $660M in 2021 (Crunchbase)
– Valuation: Acquired for $2.2B in May 2025
– Annual revenue: Revenues $440M (2024) (Yahoo)
– Website visits (Jan 2026): 85,000 (SimilarWeb)
– Employees: 1,759 (Pitchbook) vs 1,600 July ’25 to Nov ’22

Social:
– LinkedIn:  55,000 followers (1,780 employees vs. 1,760 in July ’25; 1,730 in Jan ’25; 1,710 in Sep ’24; 1,640 in Jan ’24 & Aug ’23; 1,540 in April ’23)
– G2 review:  4.4 (287 reviews vs. 266 reviews in July; 262 in Jan ’25)

10. Bonsai
FAB Score = 99 (up 6)
– HQ: San Francisco
– Founded: 2016

Traction:
– Raised: $120,000 in 2016 (Crunchbase)
– Website traffic (Jan 2026): 490,000 (SimilarWeb)
– Employees: 49 (Pitchbook), vs. 57 in July – Jan ’25; 50 in Sep ’24 & Jan ’24; 49 in Aug ’23; 27 in April ’23

Social:
– LinkedIn followers: 16,000 (57 employees vs. 52 in July; 53 in Jan ’25; 52 in Sep ’24; 48 in Jan ’24 & Aug ’23; 32 in April ’23)
– Trustpilot score: 4.1 (484 reviews vs. 457 in July ’25; 445 Sep ’24)

11. Emburse (acquired by Chrome River in 2019; Chrome River merged with Certify in 2019)
FAB Score = 91 (down 18)
Founded: 2014
HQ: LA

Traction:
Funding: $120,000 in 2016 (Crunchbase)
Website visits (Jan 2026): 460,000 (SimilarWeb)
Employees: 869 vs 840 in July, (Pitchbook); 1,000 Jan ’25 through Aug ’23

Social:
LinkedIn: 50,000 followers (865 employees vs. 851 in July; 808 in Jan ’25; 852 in Sep ’24; 946 in Jan. ’24; 952 in August ’23)

12. Stampli
FAB Score = 83 (down 4)
– HQ: San Francisco Bay Area (Mountain View)
– Founded: 2015

Traction:
– Raised $147M including $61M in 2023 and $50M in 2021 (Crunchbase)
– Website visits (Dec 2025): 200,000 (SimilarWeb)
– Employees:  315 (Pitchbook) vs 308 in July; 307 in Jan ’25; 300 Sep ’24; 265 in Jan. ’24; 217 in Aug ’23; 214 in Nov ’22

Social:
– LinkedIn: 10,000 followers (301 employees vs. 313 in July; 312 in Jan ’25; 297 in Sep ’24; 275 in Jan ’24; 245 in Aug ’23; 220 in April ’23)
– G2 rating: 4.6 (1,620 reviews vs. 1,480 in July; 1,370 Jan ’25)

13. Vcita
FAB Score = 81 (down 44)
– HQ: Seattle area (Bellevue)
– Founded: 2010

Traction:
– Raised $15M prior to 2021 (Crunchbase)
– Website visits (Jan 2026): 420,000 (SimilarWeb)
– Employees: 200 (Pitchbook), unchanged since Aug ’23; vs 172 in April ’23

Social:
– LinkedIn:  14,000 followers (189 employees vs. 187 employees in July; 185 in Jan ’24; 184 in Sep ’24; 180 in Jan ’24; 191 in Aug ’23; 174 in April ’23)
– iOS rating: 3.5 (104 reviews vs. 103 in July; 100 Jan ’25)
– Software Advice rating: 4.4 (276 reviews, unchanged since July; 275 Jan ’25)

14. Autobooks
FAB Score = 60 (down 6)
– Founded: 2015
– HQ: Detroit, Michigan

Traction:
– Raised: $153M including $55M in May 2025, $25M in 2021, & $50M in 2022 (Crunchbase)
– Website visits (Jan 2026): 93,000 (SimilarWeb)
– Employees: 100 (Pitchbook), vs 86 in July – Jan ’25; vs. 92 in Jan ’24 & Aug ’23; 141 in April ’23

Social:
– LinkedIn: 6,000 (100 employees vs. 86 in July ’25 and Jan ’25; 85 in Sep ’24; 91 in Jan ’24; 92 in Aug ’23; 99 in April ’23)
– FeaturedCustomers: 4.8 (979 reviews, up 79 since Jan)

15. BillerGenie
FAB Score = 51 (down 4)
– Founded: 2018
– HQ: Miami

Traction:
– Funding: $33.5M including $22M in Jan 2026; $2M in May 2025, $6M in 2022 (Crunchbase)
– Articles: 19 (Crunchbase)
– Website visits (Jan 2026): 230,000 (SimilarWeb)
– Employees: 60 (Pitchbook), vs 50 in July – Jan ’25; vs. 42 in Sep ’24; 40 in Jan ’24 & Aug ’23

Social:
– LinkedIn: 10,000 followers (67 employees vs. 54 in July; 51 in Jan ’25; 46 in Sep ’24; 38 in Jan. ’24; 37 in Aug ’23)

16. Plastiq (acquired by Priority, Aug 2023)
Fab score = 49 (down 4)
– Founded: 2012
– HQ: San Francisco

Traction:
– Raised: $142 million including $75M in 2020 (Crunchbase)
– Website visits (Jan 2026): 160,000 (SimilarWeb)
– Employees: 103 (Pitchbook), unchanged since Aug ’23; was 163 in April ’23

Social:
– LinkedIn: 7,000 followers (54 employees vs. 55 in July; 58 in Jan ’25; 61 in Sep ’24; 82 in Jan ’24; 102 in Aug ’23; 133 in April ’23)
– Trustpilot: 2.4 (957 reviews vs. 953 in July; 952 Jan ’25)

17. PaySimple (division of EverCommerce)
FAB Score = 44 (down 8)
– HQ: Denver, Colorado
– Founded: 2006

Traction:
– Raised $145M prior to 2021 (Crunchbase)
– Website visits (Jan 2026): 160,000 (SimilarWeb)
– Employees: 83 (Linkedin), down 8 since Nov 2022

Social:
– LinkedIn: 5,000 followers (59 employees vs. 62 in July; 67 in Jan ’25; 71 in Sep ’24; 74 in Jan ’24; 84 in Aug ’23; 83 in April ’23)
– iOS rating: 4.5 (note: only 2 reviews)
– Capterra rating: 4.5 (300 reviews, unchanged since July; 299 Jan ’25)

18. Plooto
FAB Score = 44 (up 10)
– HQ: Toronto
– Founded: 2015

Traction:
– Raised $26M including $20M in 2022 (Crunchbase)
– Website visits (Jan 2026): 200,000 (SimilarWeb)
– Employees: 111 (Pitchbook) vs 130 July ’25 – Sep ’24

Social:
– LinkedIn: 9,000 followers (110 employees vs. 108 in July; 116 in Jan ’25; 117 in Sep ’24)

19. Online Check Writer (ZilMoney)
FAB score = 43 (up 2)
– Founded: 2008
– HQ: San Francisco

Traction:
– Raised: $2.7M prior to 2020 (Crunchbase)
– Website visits (Jan 2026): 250,000 (SimilarWeb)
– Employees: 138 (Pitchbook) vs 137 in July; 134 in Jan ’25; 133 in Sep ’24 & Jan ’24; 132 in Aug ’23

Social:
– LinkedIn: 32,000 followers (138 employees vs. 139 in July ’25; 136 in Jan ’25; 134 in Sep ’24; 130 in Jan. ’24; 127 in Aug ’23; 113 in April ’23)
– Trustpilot: 4.0(1,630 reviews vs. 1,640 reviews in July; 1,620 Jan ’25)

20. InvoiceNinja
FAB Score = 34 (up 4)
– HQ: Hefa, Israel
– Founded: 2014

Traction:
– Raised Unknown (Crunchbase)
– Website visits (Jan 2026): 180,000 (SimilarWeb)
– Employees: 5 (LinkedIn)

Social:
– LinkedIn: 580 followers (5 employees, unchanged since Aug ’23)
– iOS rating: 4.8 (92 reviews vs. 83 in July; 78 Jan ’25)
– Software Advice rating: 4.7 (166 reviews vs. 165 in July; 164 Jan ’25)

21. Invoice2Go (acquired by Bill.com)
FAB Score = 21 (down 7)
– HQ: San Francisco
– Founded: 2002

Traction:
– Raised $60M prior to 2021 (Crunchbase)
– Exit: Acquired by Bill.com for $625M in July 2021
– Website visits (Jan 2026): 120,000 (SimilarWeb)
– Employees: 106 (Pitchbook), unchanged since April ’23

Social:
– LinkedIn:  9,000 followers (13 employees, unchanged since Jan ’25; vs. 19 in Sep ’24; 24 in Jan ’24; 44 in Aug ’23; 51 in April ’23)
– iOS rating: 4.9 (52,800 ratings; vs 51,600 in July; 50,300 Jan ’25)
– Capterra rating: 4.3 (267 reviews vs. 262 in July; 251 Jan ’25)

22. Routable
FAB Score = 13 (down 6)
– HQ: Seattle
– Founded: 2017

Traction:
– Raised $46.5M including $30M in 2021 (Crunchbase)
– Website visits (Jan 2026): 22,000 (SimilarWeb)
– Employees: 81 (Pitchbook), unchanged since Jan ’25; vs. 100 in Sep; 119 in Jan ’24; 129 in Aug ’23

Social:
– LinkedIn: 11,000 followers (77 employees vs. 80 employees in July to Jan ’25; 85 in Sep ’24; 110 in Jan ’24; 118 in Aug ’23; 134 in April ’23)
– FeaturedCustomers rating: 4.8 (1,010 reviews; vs. 880 in July; 763 Jan ’25)

23. Beanworks (acquired by Quadient, March 2021)
FAB Score = 10 (unchanged)
– Founded: 2012
– HQ: Vancouver, Canada

Traction:
– Funding: $12.3M in 2017 and 2018 (Crunchbase)
– Website visits (Jan 2026): 54,000 (SimilarWeb)
– Employees: 140 (Pitchbook), vs 90 July ’25 to Aug ’23

Social:
– LinkedIn: 10,000 followers (98 employees vs. 109 in July to Jan ’25; 115 in Sep ’24; 129 in Jan ’24; 133 in Aug ’23)