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LLM application testing services

Engineering trust into LLM-powered applications.

LLM-based application testing services by DeviQA, backed by 16 years of QA experience helping product teams deliver reliable, production-ready AI systems.

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Our solutions for your LLM-based application testing challenges

Turning LLM uncertainty into predictable, testable, production-ready behavior.

Non-deterministic outputs

Challenge

The same prompt can return different results due to temperature, context length, or model updates.

Solution

Semantic assertions, tolerance thresholds, and statistical baselines that validate intent and quality, not exact text.

No clear definition of “correct”

Challenge

Most LLM use cases don’t have a single right answer. Teams struggle to turn subjective expectations into testable criteria.

Solution

Rubric-based evaluation models with measurable quality gates (accuracy, relevance, safety, grounding), combining automation with targeted human review.

Complex LLM pipelines

Challenge

Over 70% of LLM failures happen outside the model, in prompts, retrieval logic, chunking, or tool orchestration.

Solution

End-to-end testing of the full pipeline: prompt templates, retrieval quality, tool calls, retries, and fallback logic.

Silent regressions from model drift

Challenge

Model or embedding updates can change behavior even when your code doesn’t, causing unnoticed production regressions.

Solution

Versioned semantic baselines, regression suites, and canary evaluations to detect behavioral drift early.

Hallucinations and factual errors

Challenge

Hallucinations remain one of the top reasons users lose trust in GenAI products, especially in regulated domains.

Solution

Grounding checks, contradiction detection, RAG validation, and confidence scoring to reduce false or invented outputs.

Security and misuse risks

Challenge

Prompt injection, indirect data leakage, and unsafe tool execution are now common LLM-specific attack vectors.

Solution

Adversarial testing, prompt hardening, access-boundary validation, and abuse-case simulations built into QA.

LLM-based software we test

Across products where model behavior directly impacts users, decisions, and business outcomes.

LLM-powered SaaS platforms

Generative AI applications

AI copilots and assistants

Chatbots and conversational systems

RAG-based enterprise applications

AI agents and workflow automation tools

LLM-driven analytics and insights platforms

Customer support and knowledge-base AI systems

Internal AI tools for engineering, sales, and operations

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The scope of our LLM software testing services

We provide end-to-end LLM-based application testing services to ensure your software delivers exceptional quality at every level.

Case studies

Partner with us:
see the difference

See all stories

Global healthcare giant

Web app testing
Test automation
API testing
Dedicated QA team
  • 90%

    Test coverage

  • 1.6k+

    Test cases created

  • X18

    Faster regression testing run

Read customer story

The first modern real estate platform

Web app testing
Test automation
E2E testing
Load testing
Mobile testing
+2
  • 85%

    Test coverage

  • 2k+

    Test cases created

  • 2.5x

    Faster regression testing run

Read customer story

Dental practice platform

Web app testing
API testing
Dedicated QA team
Mobile testing
+2
  • 95%

    Test coverage

  • 5k+

    Test cases created

  • 3k+

    Number of critical bugs logged

Read customer story

Solution for managing payments

Web app testing
Dedicated QA team
DB testing
API testing
Performance testing
  • 12

    Years of cooperation

  • 100%

    Covered performance

  • 2x

    Faster regression testing time

Read customer story

Booking system for tours and attractions

Web app testing
Test automation
Mobile testing
DB testing
Dedicated QA team
  • 90%

    Test coverage

  • 3.2k+

    Automation test scripts created

  • 1-2h

    Time of regression

Read customer story

Experience the DeviQA difference

From initial consultation to full-scale QA implementation, we deliver results.

DeviQA’s AI advantage

At DeviQA, we use AI to make testing smarter and simpler. Our ecosystem is built to deliver faster, smarter, and more cost-efficient results — so your team can do more in less time.

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AI-powered IDE assistant

Reduces test script writing time

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QA companion

Provides suggestions for test optimization and addresses gaps

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Automated code review

Flags unused variables, improper loops, and other common errors

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AI for API testing in Postman

Streamlines API test case creation and response validation

Features

Test case creation

Code review

Exploratory planning

Log analysis

without AI

6 hrs

3 hrs

2 hrs

2 hrs

with DeviQA AI

4 hrs (33% saved)

2 hrs (33% saved)

45 min (60% saved)

1 hr (50% saved)

Collaboration on your terms

Backed by 15+ years of expertise, DeviQA offers three flexible models for LLM-powered application testing services to fit your project’s needs, timeline, and budget.

Staff augmentation

LLM QA engineers added to your team as needed.

Advantages:

  • Fast access to niche LLM testing expertise

  • Flexible scaling without long-term commitments

  • Full control over priorities, tools, and workflows

Best for:

Closing skill gaps or handling peak workloads.

Get started

Dedicated QA team

A long-term LLM testing team embedded into your product.

Advantages:

  • Deep understanding of your LLM architecture, prompts, and risk profile

  • Stable quality ownership across model updates and releases

  • Predictable capacity for continuous testing and monitoring

Best for:

Continuous LLM development and frequent updates.

Get started

Project-based outsourcing

Fully managed LLM testing with fixed scope and outcomes.

Advantages:

  • Clear timelines, deliverables, and ownership

  • Independent quality assessment and risk coverage

  • No operational overhead for your internal team

Best for:

Pre-launch validation or major LLM changes.

Get started

Why choose us as your LLM-based application testing company?

Over 500,000 project man-days successfully delivered.

We take full accountability for our work.

A range of value-added services at no extra cost.

Free test trial. Try us before making any payment.

Our engineers are senior testers with strong autonomy and self-starting ability.

With a 96% retention rate, we offer stable teams, compared to the industry average of 80%.

Extensive testing lab with a wide range of environments, platforms, and devices.

Access to a technology community of over 1000 QA engineers and experts.

Quality assurance for intelligence you ship to users

Our approach to LLM-powered software testing

A structured, risk-driven approach to making LLM behavior reliable in production.

01

Architecture review

We understand your LLM system, data flows, and integrations to identify key quality risks.

02

Quality definition

We turn business expectations into clear, measurable quality criteria.

03

Scenario mapping

We model real user and edge-case scenarios relevant to production behavior.

04

Behavior validation

We assess outputs for consistency, relevance, and policy alignment across runs.

05

Regression baselines

We track behavioral changes caused by model or configuration updates.

06

Actionable feedback

We deliver insights that improve reliability and predictability over time.

Here’s what people are saying
about DeviQA

26 reviews

32 reviews

9 reviews

Review

It was so easy to integrate your people with us and we didn't have any problems.

Author

Janosch Greber

VP of engineering at RealTyme

DeviQA helped develop a cybersecurity software platform. Complex automated scenarios test REST APIs through a Faraday library. An SDK application works with Azure, Google Cloud, Docker, and LXC containers.

Yuval Or

Yuval Or

QA manager at Mimecast

Review

DeviQA has always brought us really high quality candidates for us to be able to seamlessly mesh into our team.

Author

Danny He

CEO and founder at Soapbox

DeviQA provides software QA automation engineering support to a QC and QA company. Their work includes sandbox testing, QA, testing automation, DevOps support, and TechOps support.

Alex Ohoussou

Alex Ohoussou

Head of QA & techOPs at QIMA

Review

You guys have always been genuine, flexible and personable.

Author

Ryan Austin

CEO and founder at Cognota

DeviQA has provided application testing services for an HR tech company. The team has managed feature, smoke, and regression automation tests and offered test reports.

Mia Bunjac

Mia Bunjac

QA chapter lead at Renhead Technology

Review

In fact, they have been a part of our success story, helping us grow from six workers 11 years ago to about 1200 workers now.

Author

Raanan Tauber

QA manager at Tipalti

DeviQA provides automatic testing with continuous integration for native and hybrid mobile apps.

Giurea Renato Gabriel P.F.A.

Giurea Renato Gabriel P.F.A.

CTO at Impaktsoft Projekt S.R.L.

Review

They can take my lack of knowledge and I can trust that they will be able to produce something of value.

Author

Ray Alde

Co-founder & cto at Arklign

DeviQA provides QA and testing resources on an ongoing basis. They evaluate architectures and offer both manual and automated testing. The client has also utilized their on-demand developers.

Review

To me, that's above and beyond, I did not expect that to be so smooth and so easy.

Author

Mark Levine

Chief product officer at CYDEF

DeviQA is a dedicated vendor that assists with manual and automated testing on an ongoing basis. They're also overseeing other development projects and supervising the testing portion of those.

Review

They know what they're doing because the people that they send to us are quality people.

Author

Charles Chase

Chief technology officer at Returnmates

DeviQA provided application testing services for an audio editing platform. The team was responsible for continuously testing the UI and functionality of the platform via an automated testing framework.

Review

There is also very good follow up on the engineers and the job they're doing.

Author

Olivier Mayot

Chief technology officer at SimpliField

DeviQA serves as the process improvement partner to a diabetes care and solutions company. They helped scale the client's automated testing and are now working on improving their manual testing framework.

Collaboration process overview

  • 01

    Initial contact. We start by understanding your testing needs and aligning them with your goals.

  • 02

    Assessment. Our experts analyze your current process and propose a tailored improvement plan.

  • 03

    PoC. Try a free proof of concept to see our capabilities in action.

  • 04

    Trial & evaluation. We conduct a trial phase and review the results together.

  • 05

    Contract & QA implementation. Once satisfied, we sign the contract and begin full-scale QA.

  • 06

    Flexible partnership. DeviQA offers scalable solutions to adapt to your business needs.

Ready to connect?

Just fill in your name and email, and we’ll get back to you with available slots

Questions & answers

We focus on behavioral consistency and risk coverage rather than exact outputs — this is the foundation of LLM-based application testing services.
As soon as the core use cases are defined, LLM application testing helps prevent hidden risks before scale.
We test the full system behavior around the model, which is the core of LLM-powered application testing.
The focus shifts from deterministic logic to behavioral evaluation, which defines modern LLM software testing services.
Yes, managing change and drift is built into our LLM testing services.
Absolutely, ongoing governance and improvement are central to our LLM QA services.
We translate those expectations into measurable criteria within LLM quality assurance.
Yes, our approach is designed to embed seamlessly into your delivery process through LLM application QA.
Because LLM systems require dedicated expertise that only an LLM application testing company can consistently provide.
We operate as a neutral LLM testing provider, focused solely on product quality and risk.
Yes, many clients begin with targeted LLM QA outsourcing before scaling collaboration.
We complement internal teams through structured outsourced QA for LLM applications, not replacement.
We act as an advisory LLM QA partner, helping teams make better quality decisions over time.
Yes, our testing services for LLM-based products are designed specifically for real-world, production environments.