Digital invoicing platforms help small businesses create and send professional invoices, accept electronic payments, automate reminders, and track accounts receivable. All the providers listed below also offer embedded payment options, allowing customers to pay by card or direct bank debit (electronic check) from an invoice, payment link, or customer portal.

Unlike other fintech areas filled with newer startups, six of the 11 invoicing providers are at least 15 years old. And the youngest launched in 2018.

Year founded: 2000 to 2010 >>> 6   |   2011 to 2015 >>> 2   |   2016 to 2020 >>> 3   |   2021 or later >>> 0

 

We divided the payment providers into five categories:

  1. Invoice management providers (below)
  2. Charge card & expense management (see list here)
  3. Bill payments specialists (here)
  4. Payment processors (here)
  5. Subscription management platforms (here)

 

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 (16)| Payment processors (7) | SMB digital accounting/bookkeeping (21) | Cloud Payroll Providers (20)

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

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

Rank Company FAB Score Review Founded HQ Total Funding ($M) Visits (June'26)
* Quickbooks (Intuit) NA 20 Jul 26 1983 SF 14,200,000
1 Airwallex 1744 20 Jul 26 2015 Singapore 1852 5,700,000
2 Bill.com 1674 20 Jul 26 2006 SF 1500 5,200,000
3 Wave Payments (HR Block) 1391 20 Jul 26 2009 Toronto 400 6,700,000
4 Freshbooks 598 20 Jul 26 2003 Toronto 457 2,500,000
5 Invoice2go (Bill) 100 20 Jul 26 2002 SF 625 120,000
6 Vcita 93 20 Jul 26 2010 Seattle 15 480,000
7 Bonsai (Zoom) 92 20 Jul 26 2016 SF 0 330,000
8 BillerGenie 85 20 Jul 26 2018 Miami 33.9 340,000
9 PaySimple 48 20 Jul 26 2006 Denver 145 180,000
10 Plooto 44 20 Jul 26 2015 Toronto 26 200,000
11 Routable 12 20 Jul 26 2017 Seattle 47 19,000

Source: FintechLabs, 21 July 2026 with data from Crunchbase, SimilarWeb, SEMrush, Pitchbook, Linkedin
Note: Social data from Jan 2026

* Sponsor
**Funding is the amount invested into the company as either equity or debt; or exit price if higher
***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.

Disclosure: We may receive referrals from company's listed. If it changes their ranking, we indicate that with an “*”

Challenger Invoicing Specialists in the United States

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

Traction:
– Website visits (June 2026)
>>> Quickbooks: 13.6 million (SimilarWeb)
>>> Intuit: 107 million (SimilarWeb)

1. Airwallex
FAB Score = 1,740 (up 180)
– HQ: Singapore
– Founded: 2015

Traction:
– Raised: $1.9B including $320M in June 2026; $630M in 2o25; $100M in 2022 (Crunchbase)
– Website visits (June 2026): 5.7 million (SimilarWeb)
– Employees: 2,200 vs. 1,700 in Aug '25, 1,600 in Jan '25 (Pitchbook)

Social:
– LinkedIn: 184,000 followers (2,770 employees July '26, vs 2,000 employees Jan '26; 1,760 July '25; 1,610 employees in Jan '25; 1,370 in Sep '24)

2. Bill (see also #20 Invoice2Go)
FAB Score = 1,670 (up 60)
– HQ: San Francisco Bay Area
– Founded: 2006

Traction:
– Raised $1.5 billion including $216M in its Dec 2019 IPO (Crunchbase)
– Annual revenue (TTM): $1.6B (Yahoo)
– Market Cap: $4.1B (NYSE: BILL 15 May '26)
– Website visits (June 2026): 5.2 million (SimilarWeb)
– Employees: 3,360 in Jan '26 vs 3,000 in Aug '25; 2,190 Jan to July '25; vs 2,620 Jan '24; 2,370 in Aug '23 (Pitchbook)

Social:
– LinkedIn: 68,000 followers (3,340 in Jan '26; 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)

3. Wave (acquired by H&R Block)
FAB Score = 1,390 (up 80)
– HQ: Toronto
– Founded: 2009

Traction:
– Raised $79.8M (Crunchbase)
– Exit: Acquired by H&R Block for US$400M in June 2019
– Website visits (June 2026): 6.7 million (SimilarWeb)
– Employees (Pitchbook): 303 unchanged since Aug '25;  vs 312 in July '25; 308 in Jan '25; 367 Sep '24; 303 Jan '24; 304 Aug '23; 339 Mar '23)

Social:
– LinkedIn:  22,000 followers (297 employees in Jan '26; 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).

4. Freshbooks
FAB Score = 598 (unchanged)
– HQ: Toronto
– Founded: 2003

Traction:
– Raised $457 including $125M in 2025, $131M in 2021 and $125M in 2022 (Crunchbase)
– Website visits (June 2026): 2.5 million (SimilarWeb)
– Employees: 454 unchanged since July '25; 571 in Jan '25 (Pitchbook)

Social:
– LinkedIn: 90,000 followers (420 employees in Jan '26 vs. 442 in July '25; 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)

5. Invoice2Go (acquired by Bill.com)
FAB Score = 100 
– HQ: San Francisco
– Founded: 2002

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

Social:
– LinkedIn:  9,000 followers (13 employees in Jan '26; 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)

6. Vcita
FAB Score = 93 (up 4)
– HQ: Seattle area (Bellevue)
– Founded: 2010

Traction:
– Raised $15M prior to 2021 (Crunchbase)
– Website visits (June 2026): 480,000 (SimilarWeb)
– Employees: 200 unchanged since Aug '23; vs 172 in April '23 (Pitchbook)

Social:
– LinkedIn:  14,000 followers (189 employees in Jan '26; 187 employees in July '25; 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)

7. Bonsai (acquired by Zoom)
FAB Score = 92 (up 37)
– HQ: San Francisco
– Founded: 2016

Traction:
– Raised: $120,000 in 2016 (Crunchbase)
– Website traffic (June 2026): 330,000 (SimilarWeb)
– Employees: 49 unchanged since Aug '25;  was 57 in July – Jan '25; 50 in Sep '24 & Jan '24; 49 in Aug '23; 27 in April '23 (Pitchbook)

Social:
– LinkedIn followers: 16,000 (57 employees in Jan '26; 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)

8. BillerGenie
FAB Score = 85 (up 14)
– Founded: 2018
– HQ: Miami

Traction:
– Funding: $33.9M including $22.4M in Jan 2026; $2M in May 2025, $6M in 2022 (Crunchbase)
– Articles: 19 (Crunchbase)
– Website visits (June 2026): 340,000 (SimilarWeb)
– Employees: 80 vs 60 in Aug '25; was 50 July – Jan '25; vs. 42 in Sep '24; 40 in Jan '24 & Aug '23 (Pitchbook)

Social:
– LinkedIn: 10,000 followers (67 employees in Jan '26; 54 in July; 51 in Jan '25; 46 in Sep '24; 38 in Jan. '24; 37 in Aug '23)

9. Autobooks
FAB Score = 64 (up 2)
– Founded: 2015
– HQ: Detroit, Michigan

Traction:
– Raised: $153M including $55M in May 2025, $25M in 2021, & $50M in 2022 (Crunchbase)
– Website visits (June 2026): 110,000 (SimilarWeb)
– Employees: 101 vs. 100 in Aug '25; was 86 July – Jan '25; vs. 92 in Jan '24 & Aug '23; 141 in April '23 (Pitchbook)

Social:
– LinkedIn: 6,000 (100 employees in Jan '26; 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)

10. PaySimple (division of EverCommerce in Oct 2016 for $115 million)
FAB Score = 48 (up 4)
– HQ: Denver, Colorado
– Founded: 2006

Traction:
– Raised $145M prior to 2021 (Crunchbase)
– Website visits (June 2026): 180,000 (SimilarWeb)
– Employees: 83 (Linkedin), down 8 since Nov 2022

Social:
– LinkedIn: 5,000 followers (59 employees in Jan '26; 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)

11. Plooto
FAB Score = 55 (up 3)
– HQ: Toronto
– Founded: 2015

Traction:
– Raised $26M including $20M in 2022 (Crunchbase)
– Website visits (June 2026): 200,000 (SimilarWeb)
– Employees: 111 unchanged since Aug '25; was 130 July '25 – Sep '24 (Pitchbook)

Social:
– LinkedIn: 9,000 followers (110 employees in Jan '26; 108 in July '25; 116 in Jan '25; 117 in Sep '24)

12. InvoiceNinja
FAB Score = 29 (up 4)
– HQ: Hefa, Israel
– Founded: 2014

Traction:
– Raised Unknown (Crunchbase)
– Website visits (June 2026): 150,000 (SimilarWeb)
– Employees: 5 (LinkedIn)

Social:
– LinkedIn: 580 followers (5 employees in Jan '26; 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)

13. Routable
FAB Score = 12 (down 2)
– HQ: Seattle
– Founded: 2017

Traction:
– Raised $46.5M including $30M in 2021 (Crunchbase)
– Website visits (June 2026): 19,000 (SimilarWeb)
– Employees: 72 vs. 81 from Aug to Jan '25; was 100 in Sep '24; 119 in Jan '24; 129 in Aug '23 (Pitchbook)

Social:
– LinkedIn: 11,000 followers (77 employees in Jan '26; 80 employees July '25 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)