Here is the big list of all the companies providing testing consultation or doing software testing. One of the big Indian company listed here is AppLabs Technologies. I found this list at TestingStuff and to know the details about that company google it.

1. List of Top Software Testing Companies in
the World
Here is the big list of all the companies providing testing consultation or doing software
testing. One of the big Indian company listed here is AppLabs Technologies. I found this list
at TestingStuff and to know the details about that company google it.
List of Top Software Testing Companies in the
World
1. Abel Test
2. Acutest
3. AccessTestingCentre
4. AdamsAssociates
5. AjilonGlobal SolutionsCenter
6. Alliance ComputersTelephony(I) Pvt.Ltd
7. AlliedTesting,LLC
8. Alvicom
9. AppLabsTechnologies
10. AppliedTestingandTechnology,Inc.
11. Aricent
12. BenTechComputerConsulting,Inc.

2. 13. BetaSoftInc.
14. Blue Star InfotechLtd.
15. BugHuntressQA Lab
16. Burt Gearhart,AppliedComputerTechnology
17. CemKaner
18. CertellusCorporation
19. CharlesC.Howe,CSQA,CSTE, CSTM
20. CheQSystems,Inc
21. Cigital,Inc.
22. CorTechs,Inc.
23. CRIMSoftware TestCentre
24. CSE International Ltd
25. CSS Corporation
26. CyberConsulting,Inc.
27. DecisionSoftware Systems
28. Delphi Technologies
29. DOTS
30. DrivenQA
31. EmpowermentQualityEngineering
32. ENEA Data AB
33. E-SoftSys
34. eTestIT, Inc.
35. ExamplerConsulting(BrianMarick)
36. eXeptSoftware AG
37. Full SpectrumSoftware,Inc.
38. Gillogley Services
39. GregoryM. Pope Consulting
40. Grove Consultants
41. Igor Gershovich,CTI
42. InfostretchCorporation
43. InsightConsultingLtd
44. InsightTestServicesLtd
45. INTERTECH EngineeringAssociates
46. InteticsCo.
47. IV&V Australia

3. 48. JohannaRothman
49. KarenN Johnson
50. KZA Kwaliteitszorg
51. Lionbridge Technologies,Inc.
52. logicalQA
53. LogiGearCorporation
54. Qcon
55. TelSoftLLC(Marcus T. Franklin)
56. Mera Networks
57. MethodPark America,Inc.
58. Merit
59. NCQA
60. NeilsoftInc.
61. nmqaltd
62. NotionsSystems,Inc.
63. NSTL
64. NVPSoftware Testing
65. OCS ConsultingPlc
66. Olenick&Associates
67. Omsphere
68. OptiRiskSystemsLtd.
69. Paul Jacques
70. Performax Inc
71. PowerTest
72. PrettyGood TestingApS
73. QAVantage
74. R&B Software Testing
75. Software RegulatoryServices
76. PentagonComputerConsultantsLtd.
77. PerfTestPlus
78. PersistentSystemsPrivateLimited
79. PreyerInformationTechnologyGmbH
80. ProteansSoftware Solutions
81. ProtoTestLLC
82. PureTesting

4. 83. Q AnalystsLLC
84. QualityLogicInc.
85. QualityObjectives
86. QualitySoftware Management
87. QualityTree Consulting
88. RevolutionITPtyLtd
89. Quardev,Inc.
90. QuEdge Software SolutionsPvt.Ltd.
91. QuestconTechnologies,Inc.
92. S. Pressman&Associates,Inc.
93. RajeshMokeri
94. RapidSQA
95. Rex Black ConsultingServices,Inc.
96. Rice ConsultingServices,Inc.
97. RoundRock SystemsTest
98. RTCubedConsulting,LLC
99. Real-Time TechnologySolutions
100. Safeware EngineeringCorporation
101. SAPTAN Consulting
102. SatheeshKumar
103. Satisfice,Inc.(JamesBach)
104. SoftsmithInfotechPvtLtd
105. Software Beret
106. Software DevelopmentTechnologies(SDT)
107. Software ProductivityCenterInc.
108. Software ProductivityResearch
109. Software QualityConsulting
110. Software QualityEngineering
111. Software SystemsQualityConsulting
112. Software TestingServices,Inc.
113. Sogeti
114. Spherion
115. Splaine &Associates
116. SQS
117. SQS Software QualitySystems(UK) Ltd.

5. 118. SrinivasaRaju.A
119. stag software private limited
120. SysTestLabs
121. TejasSoftware Consulting
122. TekstromInfoTechPvt.Ltd.,
123. TescomUSA
124. Testhouse Ltd.
125. Testree – a divisionof NousInfosystems
126. The TestingCenter
127. TestPerformance Inc.
128. TestPros
129. Testware Associates,Inc.
130. ThinksoftGlobal ServicesLimited
131. Tim the TestMan
132. T-Plan
133. UsabilityArchitects,Inc.
134. Usable InterfacesLtd
135. UST Global Inc
136. VeriSoftInfosystems
137. VST Consulting,Inc
138. VT Enterprise Software Validation
139. VyomlabsPvtLtd
140. Wilson-QualityConsulting
141. WorkroomProductionsLtd.
142. XP Software SolutionsPvt.Ltd.
143. ZAPTechnologiesInternational,Inc.
144. ZenTESTLabs
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