How many companies on this list record a review platform with a zero review count, and how is that different from leaving the field blank?

Of the 36 companies on this list, 16 show at least one verified review on an external platform, and 1 records a review platform together with a review count of zero. That field is filled: a platform is named, and the count on it happens to be zero. The remaining companies leave the external-review field blank entirely, which records no platform at all, so a zero count and a blank field describe two different states of the same field.

Does a CREST or ISO/IEC 27001 certificate confirm that a testing vendor meets telecom carrier security requirements?

A CREST or ISO/IEC 27001 certificate documents penetration-testing accreditation and general information-security practice. Interconnect security and lawful-intercept handling, the kind of scope a telecom carrier project often needs, sit outside what either certification is scoped to test. Among the 36 companies on this list, confirmed certificates break down into four codes: CREST at 5 companies, ISO/IEC 27001 at 3, and TMMi and ISO 9001 at one company each, with 2 companies holding two of these codes at once. The certifying body defines what each code covers, and the catalog stores only the code and the confirming source.

Does a vendor need to publish an engagement model before it can run a dedicated team for a telecom network integration?

A vendor can operate a dedicated or embedded team for a multi-quarter OSS/BSS or network rollout without ever publishing that detail on its public profile. On this list, the engagement model field is blank for 12 of the 36 companies, and two tags, Crowdtesting at scale and Embedded team model, cannot be reached while that field stays empty, because both tags are computed directly from that field. A buyer who needs a dedicated team confirmed for a telecom project should ask the vendor directly, since a blank field on this list leaves the question open.

How quickly can a testing vendor ramp up a team to handle an urgent network or OSS/BSS issue?

An urgent network or OSS/BSS issue calls for a vendor that can start immediately, and a published onboarding time is the field on this list that speaks to that speed directly. One company in this group publishes an onboarding time of 14 days or less with a source, under the Fast onboarding tag. The remaining 35 companies on this list have no published figure for ramp-up speed, leaving delivery locations and case studies as the closer comparison points a buyer can check instead.

Best Telecom QA companies in 2026

QA Rating is published independently, and its publisher owns no company listed in this catalog.

36 testing companies in this catalog list Telecom among the industries they work in. They are grouped below by what each is best suited for, in 10 groups. 8 of them hold a certificate confirmed by a register entry and 16 publish a rate card. Composition and order last changed on September 6, 2026.

36 companies. Ordered by the number of verified reviews on external platforms, highest first. Companies with an equal count are ordered by name.

The companies

Telecom: 36 companies, grouped by what they are best suited for.
#	Company	Certificates	Case studies	Team size	Reviews
Nearshore for the EU At least one delivery location in the EU or the EEA, or in Ukraine, Georgia, Serbia or Moldova.
1	Global App Testing	ISO/IEC 27001register entry	4	51-200 people	66
2	Edgescan	ISO/IEC 27001register entryCRESTregister entry	1	51-200 people	53
3	DeviQA	None confirmed	5	201-500 people	44
4	Berezha Security Group	None confirmed	Not published	11-50 people	40
5	BreachLock	CRESTregister entry	Not published	51-200 people	40
6	Applause	None confirmed	3	201-500 people	39
7	a1qa	None confirmed	3	1000 or more people	20
8	Iterasec	CRESTregister entry	1	11-50 people	19
9	White Test Lab	None confirmed	Not published	11-50 people	14
10	Soflab Technology	None confirmed	1	51-200 people	3
11	Bit Sentinel	None confirmed	Not published	11-50 people	0
12	Blaze Information Security	CRESTregister entry	Not published	11-50 people	0
13	Char49	None confirmed	Not published	1-10 people	0
14	Devoteam Cyber Trust	CRESTregister entry	Not published	Not published	0
15	Ethiack	None confirmed	2	51-200 people	0
16	Euro-Testing Software Solutions	None confirmed	Not published	51-200 people	0
17	imbus AG	ISO 9001register entryISO/IEC 27001register entry	Not published	201-500 people	0
18	QAValue	None confirmed	Not published	11-50 people	0
19	Qytera Quality GmbH	None confirmed	7	11-50 people	0
20	SQA Service	None confirmed	7	11-50 people	0
21	Tarlogic Security	None confirmed	Not published	51-200 people	0
Automation first Test automation is offered as a service, and at least one published case study reports a coverage or regression time metric.
3	DeviQA	None confirmed	5	201-500 people	44
22	QualityLogic	None confirmed	3	51-200 people	37
23	BugRaptors	None confirmed	2	501-1000 people	26
7	a1qa	None confirmed	3	1000 or more people	20
24	Moolya	None confirmed	4	501-1000 people	7
25	QualityKiosk Technologies	None confirmed	5	1000 or more people	0
Performance engineering Performance testing is offered as a service, and at least one published case study reports a throughput or latency metric.
22	QualityLogic	None confirmed	3	51-200 people	37
23	BugRaptors	None confirmed	2	501-1000 people	26
10	Soflab Technology	None confirmed	1	51-200 people	3
26	MuukTest	None confirmed	5	11-50 people	0
19	Qytera Quality GmbH	None confirmed	7	11-50 people	0
Nearshore for the USA At least one delivery location in Canada, Mexico, Central America or South America.
7	a1qa	None confirmed	3	1000 or more people	20
17	imbus AG	ISO 9001register entryISO/IEC 27001register entry	Not published	201-500 people	0
27	PLATO	None confirmed	1	501-1000 people	0
20	SQA Service	None confirmed	7	11-50 people	0
Security focus Security testing is offered, together with either penetration testing or a verified ISO/IEC 27001 certificate, and at least one published case study.
2	Edgescan	ISO/IEC 27001register entryCRESTregister entry	1	51-200 people	53
3	DeviQA	None confirmed	5	201-500 people	44
28	Qualysec	None confirmed	2	51-200 people	31
Crowdtesting at scale The crowdtesting engagement model is offered, and a published tester pool of 10,000 people or more, with a source.
1	Global App Testing	ISO/IEC 27001register entry	4	51-200 people	66
6	Applause	None confirmed	3	201-500 people	39
Device lab coverage A published device lab of 100 real devices or more, with a source.
3	DeviQA	None confirmed	5	201-500 people	44
22	QualityLogic	None confirmed	3	51-200 people	37
Embedded team model The dedicated team engagement model is offered, and at least one published case study.
3	DeviQA	None confirmed	5	201-500 people	44
7	a1qa	None confirmed	3	1000 or more people	20
Accessibility specialists Accessibility testing is offered as a service, and at least one published case study reports an accessibility conformance metric.
27	PLATO	None confirmed	1	501-1000 people	0
Fast onboarding A published onboarding time of 14 days or less, with a source.
29	CHEQ Systems	None confirmed	Not published	201-500 people	0
Other companies in this axis No applicability tag met its criterion for these profiles.
30	Kualitatem	TMMiregister entry	Not published	51-200 people	9
31	Testriq QA Lab	None confirmed	Not published	51-200 people	6
32	Bugwolf	None confirmed	Not published	11-50 people	0
33	QualiZeal	None confirmed	Not published	1000 or more people	0
34	RTTS	None confirmed	Not published	51-200 people	0
35	Testbytes	None confirmed	Not published	51-200 people	0
36	TestingXperts	None confirmed	1	1000 or more people	0

Nearshore for the EU stays the largest tag on this list, but not every neighboring tag sits inside it

Nearshore for the EU reaches 21 of the 36 companies on this list, the largest applicability tag on this page. Two narrower tags sit entirely inside that group. Crowdtesting at scale reaches 2 of the 36 companies, Global App Testing and Applause, and both also carry Nearshore for the EU. Embedded team model reaches 2 of the 36 companies, DeviQA and a1qa, and both carry it too. Nearshore for the USA does not nest inside Nearshore for the EU the same way: it reaches 4 of the 36 companies, and only 3 of those 4 also carry Nearshore for the EU. The fourth, PLATO, lists a delivery location in Canada and none inside the EU, the EEA, Ukraine, Georgia, Serbia or Moldova, so it carries Nearshore for the USA without Nearshore for the EU.

Automation first and performance engineering overlap only at the edges

Automation first reaches 6 of the 36 companies on this list: DeviQA, QualityLogic, BugRaptors, a1qa, Moolya and QualityKiosk Technologies. Performance engineering reaches 5 of the 36 companies: QualityLogic, BugRaptors, Soflab Technology, MuukTest and Qytera Quality GmbH. The two tags share only 2 of the 36 companies, QualityLogic and BugRaptors, which carry both at once. Security focus reaches 3 of the 36 companies, Edgescan, DeviQA and Qualysec, and none of the three also carries Performance engineering. Device lab coverage reaches 2 of the 36 companies, DeviQA and QualityLogic, and only one of the two, DeviQA, also carries Nearshore for the EU; QualityLogic does not.

A telecom-sector case study names the client at only one company

Of the 18 companies on this list that publish at least one case study, 4 have at least one whose title or summary points to a telecom-sector client: SQA Service, Qytera Quality GmbH, a1qa and Edgescan. SQA Service names four operators directly across four separate case studies: Openserve, Deutsche Telekom, Sunrise Communications and Vodafone Italia. Qytera Quality GmbH names the mobile app itself in its case study title, Telekom Connect, rather than describing the client only by industry. The other two, a1qa and Edgescan, point to a telecom client without naming it: a1qa describes the work as being for "an international mobile operator association," and Edgescan titles its case study "A U.S.-Based Telecom Manufacturer and Operator," neither naming the company involved.

Where the profiles on this list leave the most fields blank

Signs a BAA / GDPR DPA is left blank for 35 of the 36 companies on this list. Certificates are confirmed for 8 of the 36, and left blank for 28. Client stages are missing for 24 of the 36, and named clients are missing for 14 of the 36. Published hourly rates are missing for 20 of the 36, and frameworks are missing for 17 of the 36. Case studies are missing for 18 of the 36, and external reviews are missing for 19 of the 36 as well. A blank field on this list is not a refusal, only the absence of a published answer: a missing Signs a BAA / GDPR DPA entry says what a company has not recorded.

How this ranking was put together

Membership is computed from the profile, not chosen: companies appear here when they list Telecom among the industries they work in, as their own profile states. Position in a ranking cannot be bought. Paid options are limited to the extended profile, labelled sponsor slots and lead forms, and none of them affect tags or order.

The table compares the fields that decide this axis: certificates, case studies, team size, plus the number of verified reviews on external platforms. Rates, minimum project size and onboarding time carry the source they came from next to the value.

Nearshore for the EU: At least one delivery location in the EU or the EEA, or in Ukraine, Georgia, Serbia or Moldova.
Automation first: Test automation is offered as a service, and at least one published case study reports a coverage or regression time metric.
Performance engineering: Performance testing is offered as a service, and at least one published case study reports a throughput or latency metric.
Nearshore for the USA: At least one delivery location in Canada, Mexico, Central America or South America.
Security focus: Security testing is offered, together with either penetration testing or a verified ISO/IEC 27001 certificate, and at least one published case study.
Crowdtesting at scale: The crowdtesting engagement model is offered, and a published tester pool of 10,000 people or more, with a source.
Device lab coverage: A published device lab of 100 real devices or more, with a source.
Embedded team model: The dedicated team engagement model is offered, and at least one published case study.
Accessibility specialists: Accessibility testing is offered as a service, and at least one published case study reports an accessibility conformance metric.
Fast onboarding: A published onboarding time of 14 days or less, with a source.

The criteria for this axis are on the methodology page, together with field definitions and the rule for editorial order. Changes of order are recorded in the changelog.

Questions

How many companies on this list record a review platform with a zero review count, and how is that different from leaving the field blank?: Of the 36 companies on this list, 16 show at least one verified review on an external platform, and 1 records a review platform together with a review count of zero. That field is filled: a platform is named, and the count on it happens to be zero. The remaining companies leave the external-review field blank entirely, which records no platform at all, so a zero count and a blank field describe two different states of the same field.
Does a CREST or ISO/IEC 27001 certificate confirm that a testing vendor meets telecom carrier security requirements?: A CREST or ISO/IEC 27001 certificate documents penetration-testing accreditation and general information-security practice. Interconnect security and lawful-intercept handling, the kind of scope a telecom carrier project often needs, sit outside what either certification is scoped to test. Among the 36 companies on this list, confirmed certificates break down into four codes: CREST at 5 companies, ISO/IEC 27001 at 3, and TMMi and ISO 9001 at one company each, with 2 companies holding two of these codes at once. The certifying body defines what each code covers, and the catalog stores only the code and the confirming source.
Does a vendor need to publish an engagement model before it can run a dedicated team for a telecom network integration?: A vendor can operate a dedicated or embedded team for a multi-quarter OSS/BSS or network rollout without ever publishing that detail on its public profile. On this list, the engagement model field is blank for 12 of the 36 companies, and two tags, Crowdtesting at scale and Embedded team model, cannot be reached while that field stays empty, because both tags are computed directly from that field. A buyer who needs a dedicated team confirmed for a telecom project should ask the vendor directly, since a blank field on this list leaves the question open.
How quickly can a testing vendor ramp up a team to handle an urgent network or OSS/BSS issue?: An urgent network or OSS/BSS issue calls for a vendor that can start immediately, and a published onboarding time is the field on this list that speaks to that speed directly. One company in this group publishes an onboarding time of 14 days or less with a source, under the Fast onboarding tag. The remaining 35 companies on this list have no published figure for ramp-up speed, leaving delivery locations and case studies as the closer comparison points a buyer can check instead.

Other axes these companies appear on

Delivery location: Europe 23 of these 36 companies also stand there
Type of testing: Manual testing 22 of these 36 companies also stand there
Delivery proximity: nearshore for a buyer in the EU 21 of these 36 companies also stand there
Type of testing: Performance testing 19 of these 36 companies also stand there

How to choose a vendor on this axis

Published by QA RatingPublished on September 3, 2026Updated on September 5, 2026

Every fact about a company comes from a listed source. A field without a source stays empty. A certificate counts as confirmed only when a registry, certificate or auditor report backs it; a certificate the company only claims about itself is published separately, under that label. Vendors can request a correction at hello@qa-rating.com. A correction is applied when it comes with a public source.