THE DIGITAL AGENCY THAT BRINGS HAPPINESS
.We design and build websites, eCommerce, and web applications that make people feel something — and make companies grow.
SIX DISCIPLINES. ONE OBSESSION: HAPPINESS.
End-to-end partners — strategy, design, engineering, and growth. No handoffs, no middlemen.
Websites & Redesign
Corporate, business and product sites with unique design.
Online Shops
Conversion-first eCommerce built on modern stacks.
Web & Mobile Apps
Scalable applications from MVP to production.
UX/UI Design
Interfaces that are beautiful, responsive and intuitive.
Branding
A unique presence in the marketplace — worth remembering.
SEO
Organic visibility that compounds. Built on clean architecture.
WE ARE THE TEAM YOU WISH YOU HIRED SOONER.
Unique Design
Every product is crafted from scratch — no templates, no shortcuts.
Great Performance
Obsessive optimisation. Sub-second loads. Core Web Vitals all green.
Competitive Pricing
Transparent pricing that fits real-world budgets.
Latest Technology
Modern stacks for long-term scale and maintainability.
Young & Creative
A senior team that still treats every brief like our first.
Fast & Responsive
On-time delivery, and support that answers — 24/7.
SOME OF THE BRANDS WE MADE HAPPIER.
We are proud to have worked with these amazing companies.
CLEAR NUMBERS. NO SURPRISES
Starting points — every engagement is scoped together.
Landing
A high-impact single-page site to launch fast.
- Bespoke design
- Custom UI/UX
- Responsive design
- 2 revision round
- 2-week delivery
Website
A multi-page brand site with CMS and full SEO.
- Unlimited pages
- Custom UI/UX
- Responsive design
- 3 revision rounds
- 4-week delivery
- Translations up to 3 languages
eCommerce
Conversion-optimised online store, fully wired.
- Catalog + checkout
- Payments integrated
- Admin dashboard
- Performance tuned
- 5-week delivery
Custom
Web apps, SaaS dashboards, dedicated engineering.
- Discovery workshop
- Technical architecture
- Ongoing retainer
- SLA support
CLIENTS DON'T LIE
"They rebuilt our site and tripled our inbound leads in a quarter. Extremely responsive team."
Maria K.
PARTNER, ADVOKATIA
"Webserotonin took our eCommerce from clunky to class-leading. Conversion up 41%."
Petar D.
FOUNDER, UNBOXD
"Design, engineering, SEO — one team, zero drama. We recommend them without reservation."
Elena V.
MARKETING DIRECTOR, VITERGY
"The speed and polish are unmatched in Sofia. They treat our product like their own."
Ivan T.
CTO, HEALTHCARE-S
YOUNG, SERIOUS, FROM SOFIA.
Webserotonin is a fast-growing digital agency based in Sofia, Bulgaria. We build landing pages, websites, eCommerce stores, web applications, plugins and SEO programs. We're young, creative, and seriously committed to the craft. We love getting our hands on exciting projects — and we believe a website can, in fact, make you happy.
