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Developer APIs

44 of the Most Successful Developer APIs Startups

If you're building a Developer APIs startup, you must check this list of the 44 most successful ones.

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Think Developer APIs is boring and everything’s been done before?

Think again.

If you’re in the Developer APIs industry or are interested in starting a company in this space, this article dives into 44 of the hottest fast-growing Developer APIs startups.


44 Developer APIs Startups

1) Nylas

1) Nylas

Nylas is an API platform that enables developers to create features that link to any email, calendar, or contact provider on the planet.

Details of the startup:

  • Country: United States
  • City: San Francisco
  • Started in: 2013
  • Founders: Christine Spang, Gleb Polyakov, Michael Grinich
  • Number of employees: 101-250
  • Funding amount: $175,000,000
  • Number of funding rounds: 6
  • Number of investors: 28

You can find their website here.

2) Salt Security

2) Salt Security

Salt Security is an API protection technology that uses machine learning and artificial intelligence to prevent threats.

Details of the startup:

  • Country: United States
  • City: Palo Alto
  • Started in: 2016
  • Founders: Michael Nicosia, Roey Eliyahu
  • Number of employees: 51-100
  • Funding amount: $131,000,000
  • Number of funding rounds: 5
  • Number of investors: 13

You can find their website here.

3) Belvo

3) Belvo

Belvo is an open financial API platform that allows customers to link their accounts to a mobile app.

Details of the startup:

  • Country: Mexico
  • City: Mexico City
  • Started in: 2019
  • Founders: Pablo Viguera, Uri Tintore
  • Number of employees: 51-100
  • Funding amount: $56,000,000
  • Number of funding rounds: 5
  • Number of investors: 17

You can find their website here.

4) project44

4) project44

For shippers and third-party logistics companies, project44 offers an advanced supply chain visibility platform.

Details of the startup:

  • Country: United States
  • City: Chicago
  • Started in: 2014
  • Founders: Jett McCandless, Wally Ibrahim
  • Number of employees: 251-500
  • Funding amount: $397,500,000
  • Number of funding rounds: 7
  • Number of investors: 18

You can find their website here.

5) Auth0

5) Auth0

Auth0 is an online, mobile, IoT, and internal application identity management platform.

Details of the startup:

  • Country: United States
  • City: Bellevue
  • Started in: 2013
  • Founders: Eugenio Pace, Matias Woloski
  • Number of employees: 501-1000
  • Funding amount: $332,275,000
  • Number of funding rounds: 9
  • Number of investors: 16

You can find their website here.

6) Algolia

6) Algolia

Algolia is a Search-as-a-Service platform that helps businesses to offer quick and relevant digital experiences that produce tangible results.

Details of the startup:

  • Country: United States
  • City: San Francisco
  • Started in: 2012
  • Founders: Julien Lemoine, Nicolas Dessaigne
  • Number of employees: 251-500
  • Funding amount: $184,220,000
  • Number of funding rounds: 8
  • Number of investors: 33

You can find their website here.

7) Foursquare

7) Foursquare

Foursquare is a location technology platform that uses a deep understanding of location to provide business solutions and consumer products.

Details of the startup:

  • Country: United States
  • City: New York
  • Started in: 2009
  • Founders: Dennis Crowley, Naveen Selvadurai
  • Number of employees: 251-500
  • Funding amount: $390,350,000
  • Number of funding rounds: 9
  • Number of investors: 23

You can find their website here.

8) RevenueCat

8) RevenueCat

RevenueCat is a mobile subscription framework that enables in-app purchases and subscriptions simple to create and manage.

Details of the startup:

  • Country: United States
  • City: San Francisco
  • Started in: 2017
  • Founders: Jacob Eiting, Miguel Carranza
  • Number of employees: 11-50
  • Funding amount: $56,500,000
  • Number of funding rounds: 4
  • Number of investors: 16

You can find their website here.

9) Extend

9) Extend

Extend offers retailers longer warranties as a service and improves the broken customer experience that comes with them.

Details of the startup:

  • Country: United States
  • City: San Francisco
  • Started in: 2019
  • Founders: Joe Moss, Michael Darmousseh, Rohan Shah, Woodrow H. Levin
  • Number of employees: 101-250
  • Funding amount: $316,400,000
  • Number of funding rounds: 4
  • Number of investors: 18

You can find their website here.

10) Checkr

10) Checkr

Checkr aims to make professional background checks more automated.

Details of the startup:

  • Country: United States
  • City: San Francisco
  • Started in: 2014
  • Founders: Daniel Yanisse, Jonathan Perichon
  • Number of employees: 251-500
  • Funding amount: $309,000,000
  • Number of funding rounds: 6
  • Number of investors: 26

You can find their website here.

11) IntelePeer

11) IntelePeer

The NEW Customer Experience is Powered by IntelePeer

Details of the startup:

  • Country: United States
  • City: San Mateo
  • Started in: 2003
  • Founders: Haydar Haba
  • Number of employees: 101-250
  • Funding amount: $252,139,097
  • Number of funding rounds: 10
  • Number of investors: 9

You can find their website here.

12) Sendinblue

12) Sendinblue

Sendinblue is a company that creates a cloud-based digital marketing platform for fostering long-term client connections.

Details of the startup:

  • Country: France
  • City: Paris
  • Started in: 2007
  • Founders: Armand Thiberge, Kapil Sharma
  • Number of employees: 251-500
  • Funding amount: $197,652,944
  • Number of funding rounds: 5
  • Number of investors: 6

You can find their website here.

13) Mux

13) Mux

Mux is a video platform that allows any development team to stream video and track analytics.

Details of the startup:

  • Country: United States
  • City: San Francisco
  • Started in: 2015
  • Founders: Adam Brown, Jon Dahl, Matt McClure, Steve Heffernan
  • Number of employees: 101-250
  • Funding amount: $173,920,000
  • Number of funding rounds: 7
  • Number of investors: 25

You can find their website here.

14) Cequence Security

14) Cequence Security

Cequence Security is a firm that develops end-to-end API security software to protect customers against dangerous bot assaults.

Details of the startup:

  • Country: United States
  • City: Sunnyvale
  • Started in: 2014
  • Founders: Ameya Talwalkar, Michael Barrett, Shreyans Mehta
  • Number of employees: 51-100
  • Funding amount: $29,500,000
  • Number of funding rounds: 5
  • Number of investors: 11

You can find their website here.

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15) Prismic

15) Prismic

With an API, CDN, and a Writing Room, you can create a headless CMS.

Details of the startup:

  • Country: United States
  • City: San Francisco
  • Started in: 2013
  • Founders: Guillaume Bort, Sadek Drobi
  • Number of employees: 11-50
  • Funding amount: $20,000,000
  • Number of funding rounds: 1
  • Number of investors: 2

You can find their website here.

16) Sendbird

16) Sendbird

Sendbird is a messaging-as-a-service API that allows mobile apps and websites to send chat, audio, and video messages.

Details of the startup:

  • Country: United States
  • City: San Mateo
  • Started in: 2013
  • Founders: Brandon Y Jeon, Forest Lee, Harry Kim, John S. Kim
  • Number of employees: 101-250
  • Funding amount: $220,720,000
  • Number of funding rounds: 7
  • Number of investors: 19

You can find their website here.

17) SmartBear

17) SmartBear

SmartBear is a software development and testing company that specializes in enterprise applications.

Details of the startup:

  • Country: United States
  • City: Somerville
  • Started in: 2009
  • Founders: Jason Cohen
  • Number of employees: 251-500
  • Funding amount: $24,968,750
  • Number of funding rounds: 3
  • Number of investors: 3

You can find their website here.

18) Tealium

18) Tealium

Tealium is a customer data orchestration tool provider that aims to solve problems in online search, marketing, and segment targeting.

Details of the startup:

  • Country: United States
  • City: San Diego
  • Started in: 2008
  • Founders: Ali Behnam, Mike Anderson
  • Number of employees: 501-1000
  • Funding amount: $263,900,000
  • Number of funding rounds: 9
  • Number of investors: 17

You can find their website here.

19) Dwolla

19) Dwolla

Dwolla, Inc. is a FinTech firm that, with their modern payments technology, is revolutionizing the way innovative businesses move money.

Details of the startup:

  • Country: United States
  • City: Des Moines
  • Started in: 2008
  • Founders: Ben Milne, Shane Neuerburg
  • Number of employees: 51-100
  • Funding amount: $51,355,000
  • Number of funding rounds: 8
  • Number of investors: 13

You can find their website here.

20) Bestow

20) Bestow

Bestow is an insurance technology firm that provides families with affordable term life insurance.

Details of the startup:

  • Country: United States
  • City: Dallas
  • Started in: 2016
  • Founders: Jonathan Abelmann, Melbourne O'Banion
  • Number of employees: 101-250
  • Funding amount: $137,500,000
  • Number of funding rounds: 4
  • Number of investors: 8

You can find their website here.

21) Dispatch

21) Dispatch

Dispatch is the operating system that allows the world's largest service brands to deliver modern service experiences.

Details of the startup:

  • Country: United States
  • City: Boston
  • Started in: 2013
  • Founders: Alex Beletsky, Avi Goldberg, Eliran Sapir, Yaakov James Zar
  • Number of employees: 11-50
  • Funding amount: $18,100,000
  • Number of funding rounds: 4
  • Number of investors: 12

You can find their website here.

22) Hull

22) Hull

Hull assists companies in orchestrating client data and personalizing customer experiences at scale.

Details of the startup:

  • Country: United States
  • City: Atlanta
  • Started in: 2013
  • Founders: Jimmy Oliger, Matthieu Chereau, Romain Dardour, Stefan Koenig, Stéphane Bellity
  • Number of employees: 11-50
  • Funding amount: $5,201,199
  • Number of funding rounds: 3
  • Number of investors: 11

You can find their website here.

23) Rev.com

23) Rev.com

Rev is the world's largest and most popular voice-to-text service, combining human and artificial intelligence.

Details of the startup:

  • Country: United States
  • City: Austin
  • Started in: 2010
  • Founders: Dan Kokotov, David Abrameto, Jason Chicola, Josh Breinlinger, Mark Chen, Paul Huck
  • Number of employees: 251-500
  • Funding amount: $33,000,000
  • Number of funding rounds: 1
  • Number of investors: 3

You can find their website here.

24) Sila

24) Sila

Sila is a banking as a service platform that allows software teams to program money.

Details of the startup:

  • Country: United States
  • City: Portland
  • Started in: 2018
  • Founders: Alexander Lipton, Angela Angelovska-Wilson, Isaac Hines, Shamir Karkal
  • Number of employees: 11-50
  • Funding amount: $7,700,000
  • Number of funding rounds: 3
  • Number of investors: 9

You can find their website here.

25) Stream

25) Stream

In a fraction of the time and cost of developing in-house, Stream creates chat and feeds for apps at scale.

Details of the startup:

  • Country: United States
  • City: Boulder
  • Started in: 2014
  • Founders: Thierry Schellenbach, Tommaso Barbugli
  • Number of employees: 101-250
  • Funding amount: $58,058,000
  • Number of funding rounds: 6
  • Number of investors: 25

You can find their website here.

26) Sensedia

26) Sensedia

Sensedia is a modern services connectivity and integration specialist that specializes in API administration, service mesh, and legacy integration.

Details of the startup:

  • Country: Brazil
  • City: Sao Paulo
  • Started in: 2007
  • Founders: Kleber Bacili, Leonardo Mattiazzi, Marcílio Oliveira
  • Number of employees: 251-500
  • Funding amount: $21,000,000
  • Number of funding rounds: 1
  • Number of investors: 1

You can find their website here.

27) Octopus Deploy

27) Octopus Deploy

Octopus Deploy is a deployment automation tool that is part of a DevOps automation platform.

Details of the startup:

  • Country: Australia
  • City: Brisbane
  • Started in: 2012
  • Founders: Paul Stovell
  • Number of employees: 101-250
  • Funding amount: $172,500,000
  • Number of funding rounds: 1
  • Number of investors: 1

You can find their website here.

28) YAP

28) YAP

In Asia, YAP is the API Platform for Banking and Payments. YAP is used by more than 200 Fintechs throughout Asia.

Details of the startup:

  • Country: India
  • City: Alandur
  • Started in: 2014
  • Founders: Madhusudanan R, Prabhu R
  • Number of employees: 101-250
  • Funding amount: $15,997,308
  • Number of funding rounds: 3
  • Number of investors: 14

You can find their website here.

29) Conekta

29) Conekta

Conekta creates an online payment platform that aids banks and financial institutions in securing and streamlining their operations.

Details of the startup:

  • Country: Mexico
  • City: Mexico City
  • Started in: 2011
  • Founders: Cristina Randall, Hector Cardenas, Leo Fischer
  • Number of employees: 101-250
  • Funding amount: $21,745,000
  • Number of funding rounds: 7
  • Number of investors: 12

You can find their website here.

30) Intrepid Group Asia

30) Intrepid Group Asia

Intrepid Group Asia prioritizes assisting brand partners and providers in maximizing e-commerce opportunities.

Details of the startup:

  • Country: Indonesia
  • City: Jakarta
  • Started in: 2017
  • Founders: Sean Lawlor
  • Number of employees: 101-250
  • Funding amount: $11,000,000
  • Number of funding rounds: 4
  • Number of investors: 6

You can find their website here.

31) Controlant

31) Controlant

Controlant is a supply chain company that works with highly regulated industries like pharmaceuticals and life sciences, as well as the food and beverage industry.

Details of the startup:

  • Country: Iceland
  • City: Reykjavík
  • Started in: 2007
  • Founders: Erlingur Brynjulfsson, Gisli Herjolfsson, Stefan Karlsson, Trausti Thormundsson
  • Number of employees: 101-250
  • Funding amount: $54,722,277
  • Number of funding rounds: 13
  • Number of investors: 5

You can find their website here.

32) SkedGo

32) SkedGo

Enterprises, governments, and startups can benefit from trip planning and MaaS technology. TripGo app WLs and the leading API for mixed/multimodal transportation services

Details of the startup:

  • Country: Australia
  • City: Sydney
  • Started in: 2009
  • Founders: Adrian Schönig, Claus von Hessberg, Dr Tim Cooper, John Nuutinen
  • Number of employees: 11-50
  • Funding amount: A$4,753,400
  • Number of funding rounds: 5
  • Number of investors: 3

You can find their website here.

33) Osana Salud

33) Osana Salud

Infrastructure for the healthcare industry in LATAM that is API-connected

Details of the startup:

  • Country: Argentina
  • City: Buenos Aires
  • Started in: 2019
  • Founders: Andres Lawson
  • Number of employees: 11-50
  • Funding amount: $7,350,000
  • Number of funding rounds: 3
  • Number of investors: 7

You can find their website here.

34) Fuse

34) Fuse

For both designers and developers, Fuse makes app creation faster, easier, and more enjoyable.

Details of the startup:

  • Country: Norway
  • City: Oslo
  • Started in: 2011
  • Founders: Anders Lassen, Morten Fornes
  • Number of employees: 11-50
  • Funding amount: $18,300,000
  • Number of funding rounds: 4
  • Number of investors: 3

You can find their website here.

35) Salt Edge Inc.

35) Salt Edge Inc.

A leader in offering Open Banking API solutions to banks, fintechs, lenders, and credit bureaus, with over 5000 banks in 50 countries.

Details of the startup:

  • Country: Canada
  • City: Toronto
  • Started in: 2013
  • Founders: Dmitrii Barbasura
  • Number of employees: 51-100
  • Funding amount: $3,000,000
  • Number of funding rounds: 1

You can find their website here.

36) Quandl

36) Quandl

Quandl is an investment professional's go-to source for open, commercial, and alternative data.

Details of the startup:

  • Country: Canada
  • City: Toronto
  • Started in: 2011
  • Founders: Abraham Thomas, Tammer Kamel
  • Number of employees: 11-50
  • Funding amount: CA$20,400,000
  • Number of funding rounds: 4
  • Number of investors: 4

You can find their website here.

37) Buf

37) Buf

Buf is developing solutions to assist businesses in entirely changing how they work with APIs across their whole lifecycle.

Details of the startup:

  • Country: Canada
  • City: Toronto
  • Started in: 2020
  • Number of employees: 1-10
  • Funding amount: $25,463,794
  • Number of funding rounds: 3

You can find their website here.

38) Gengo

38) Gengo

Gengo is a global, crowdsourced translation tool that allows anybody to read and publish in multiple languages with a single click.

Details of the startup:

  • Country: Japan
  • City: Tokyo
  • Started in: 2008
  • Founders: Matthew Romaine, Rangu Robāto, Robert Laing, Takeshi Amano
  • Number of employees: 11-50
  • Funding amount: $25,322,957
  • Number of funding rounds: 7
  • Number of investors: 24

You can find their website here.

39) Easebuzz

39) Easebuzz

Easebuzz is a software platform that enables B2B businesses and start-ups to transform into fintechs and expand their businesses.

Details of the startup:

  • Country: India
  • City: Pune
  • Started in: 2015
  • Founders: Rohit Prasad
  • Number of employees: 101-250
  • Funding amount: $4,000,000
  • Number of funding rounds: 1
  • Number of investors: 5

You can find their website here.

40) EMnify

40) EMnify

EMnify is the most popular IoT cloud communication platform. Unlike other CPaaS providers, EMnify focuses entirely on IoT.

Details of the startup:

  • Country: Germany
  • City: Berlin
  • Started in: 2014
  • Founders: Alexander Schebler, Frank Stoecker, Martin Giess
  • Number of employees: 101-250
  • Funding amount: € 20,000,000
  • Number of funding rounds: 3

You can find their website here.

41) eyeson

41) eyeson

eyeson is a cloud-based video conferencing SaaS and API.

Details of the startup:

  • Country: Austria
  • City: Graz
  • Started in: 2010
  • Founders: Andreas Kröpfl, Michael Wolfgang
  • Number of employees: 11-50
  • Funding amount: € 4,500,000
  • Number of funding rounds: 7
  • Number of investors: 6

You can find their website here.

42) Mailjet

42) Mailjet

Mailjet is a real-time cloud emailing technology that increases email deliverability while also allowing customers to manage and monitor messages sent.

Details of the startup:

  • Country: France
  • City: Paris
  • Started in: 2010
  • Founders: Julien Tartarin, Nicolas Chaunu, Quentin Nickmans, Thibaud Elziere, Wilfried Durand
  • Number of employees: 101-250
  • Funding amount: $17,606,194
  • Number of funding rounds: 6
  • Number of investors: 6

You can find their website here.

43) Acesso

43) Acesso

Acesso is a financial services firm that specializes in providing and managing prepaid cards and payment methods.

Details of the startup:

  • Country: Brazil
  • City: Sao Paulo
  • Started in: 2010
  • Founders: Davi Holanda, Davi Holanda, Jonathan Whittle, Sergio Kulikovsky
  • Number of employees: 101-250
  • Funding amount: R$21,000,000
  • Number of funding rounds: 4
  • Number of investors: 4

You can find their website here.

44) Reloadly

44) Reloadly

APIs for prepaid airtime, data, and digital mobile payments that work across emerging markets.

Details of the startup:

  • Country: Spain
  • City: Barcelona
  • Started in: 2018
  • Founders: Emmanuel Piard, Michel Francis
  • Number of employees: 11-50
  • Funding amount: $3,301,405
  • Number of funding rounds: 4
  • Number of investors: 9

You can find their website here.

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