Here are several leading web development firms in Malaysia (well-rated by industry directories and client reviews). I’ve included a short note on specialties and a citation for each so you can check recent portfolios and contact details.

1. Lizard Global — full‑stack web and e‑commerce development, strong enterprise experience (Kuala Lumpur). (Clutch.co)
2. Upstack Studio — web apps, product design and mobile/web platforms; good for mid‑market and startups. (Clutch.co)
3. Vermaze — web design + front‑end development, smaller agency focused on UX and branding. (Clutch.co)
4. Zensite — website builds and CMS work, known for brand‑driven sites. (Clutch.co)
5. Xedea — custom web development and integrations, experience with APIs and back‑end systems. (Clutch.co)
6. Jumix — software and web development (Penang-based), often used for product and platform builds. (Clutch.co)
7. Hitachi eBworx — larger technology/consulting firm that does web platforms and enterprise solutions (Petaling Jaya). Useful when you need deep finance/enterprise experience. (en.Wikipedia.org)
8. WoWoNiNi Sdn Bhd — web and digital services, smaller price point and local clients. (Clutch.co)

Notes on choosing:

• If you want independent rankings and client reviews, Clutch’s Malaysia web developer/designer listings are a useful starting point (they show hourly rates, team size, client reviews and portfolios). (Clutch.co)
• For enterprise or regulated‑industry projects (finance, large retail), consider firms with enterprise portfolios (e.g., Hitachi eBworx, Lizard Global). (en.Wikipedia.org)

Would you like these narrowed by city (Kuala Lumpur vs Penang vs Johor), by budget (hourly range), or by project type (e‑commerce, CMS, custom web app)? I can also pull direct portfolio links and contact pages for any firms you pick.