BrillMark

BrillMark supplies developers who build and launch website experiments. Its customers are conversion optimisation agencies, growth teams and B2B and direct-to-consumer brands. It describes itself as a distributed team of developers with more than ten years of experience.

What BrillMark offers

• A/B test development — hand-coded experiments on any testing platform, checked across browsers and devices.
• Web development — Shopify migration and theme work, plus WordPress development.
• AI and automation — chatbot and agent development, with AI used for repeatable tasks and people responsible for the logic.
• QA and optimisation — pre-launch checks, speed work and accessibility fixes.
• CRO programmes — optimisation support, including analytics data combined with test results.

Who it works with

Agencies and brands that have testing ideas but not enough in-house developers, or whose testing volume rises and falls. The company says it has served more than 200 agencies and global brands.

Key facts

• Experience: more than 10 years
• Code handover: experiment code is stored on GitHub for the client