Is your testing trustworthy? We train teams and implement state-of-the-art A/B testing methodologies, including parallel testing, sequential testing, CUPED and more, to help you scale your testing efforts, improve accuracy, and better understand the true impact of your actions.
Our Amazing Services
Advanced A/B Testing tool
Move faster and trust your tests with our A/B Testing tool. We develop in-house dashboards with robust capabilities, like Sequential Testing, SRM, CUPED, Automated sub-segment analysis and more. The results? X3 more tests, 50% shorter run-time, 75% less analysts-time per test, and more reliable test results.
On-demand specialists
Make sure your team is set for success with our A/B Testing specialists. We will support your test planning, analyze your tests, handle edge cases, and train your analysts, to guarantee your team is capable of launching A/B Tests properly and swiftly.
Tech stack audit
We review your current A/B Testing efforts - from data integrity to randomization mechanisms; Asses relevant A/B Testing tools, using Bell internal framework; And provide you with our findings, recommended tools, and best practices and know-how’s for proper tech implementation.
Professional workshops
Looking to empower your analysts and data scientists? We offer A/B Testing workshops, customized to your business context and needs, on topics like Parallel Testing, CUPED, Sequential Testing and SRM. Make sure your team has everything they need to make reliable decisions.
CRO acceleration program
Get hands-on support from our seasoned CRO expert to guide your team through a structured optimization process. We will help you run impactful tests, uncover high-leverage opportunities, and build lasting CRO expertise, ensuring your team can drive continuous improvement across your KPIs.
Everything you ever wanted to know, we've got you covered
Which companies are a good fit for Bell’s A/B Testing services?
Our A/B Testing services are ideal for companies that regularly conduct A/B Tests (a few per month) or plan to make A/B Testing a key focus in the upcoming year.
How long does it take to develop and implement your A/B Testing tool?
It typically takes around 3 months to develop and implement.
How much do your services cost?
Our services are customized to meet your specific needs, so pricing varies between projects. For detailed information, please contact us.
What does the workshop include?
Our six-hour workshop covers the fundamentals and theory of A/B Testing, practical tools, and real-life examples.
What capabilities will your A/B Testing tool provide us with?
Our A/B Testing tool offers several advanced capabilities, including: Handling outliers (winsorizing (capping at the 99.5th percentile) is the industry standard for managing outliers); Sequential Testing (the ability to stop a test early if it is clearly winning or if it doesn’t have a chance to win); Advanced Sub-Segment Analysis (automatically highlights sub-segments (e.g., tiers) that show a significant difference from the general trend); CUPED (enhances statistical power using pre-existing data, offering a more advanced before-and-after approach); and SRM (reliability test designed to check if groups are balanced).
What results can I expect from the tech stack audit?
You'll receive a comprehensive analysis of your current A/B Testing efforts, recommended tools, and best practices. By the end of the audit, your team will be ready to integrate an A/B Testing tool.
What results can I expect from the workshop?
By the end of the workshop, your team will understand A/B Testing basics, practical challenges, and solutions, and will be equipped to design and execute simple A/B tests.
What results can I expect from the advanced A/B Testing tool?
You can expect to run 3 times more tests, reduce test run-time by 50-60%, cut analyst time per test by 75%, and achieve more reliable test results.
Why choose you over doing it ourselves?
Bell is a boutique agency specializing in A/B Testing with extensive experience and knowledge across industries. Our best practices are trusted and used by top companies like Monday.com and Playtika. For more details, visit our Case Studies page.
What do you need from us?
While we handle most of the work, we require access to your data, and an initial support from your Analytical team, to tailor our services to your needs.
Do you assist in deciding whether to build or buy an A/B Testing solution?
Yes, our Tech Stack Audit includes reviewing your current efforts, assessing relevant tools, and providing findings, best practices, and implementation support.
When is the best time to onboard the A/B Testing specialist?
You should onboard an A/B Testing specialist if you conduct several A/B tests monthly or plan to focus on A/B Testing in the coming year to ensure optimal performance.
