Choose a web development company by verifying five things: (1) Lighthouse scores on their own site and client sites (should be 80+), (2) live portfolio URLs with measurable outcomes, (3) modern tech stack (React, Next.js, TypeScript), (4) clear contract terms including IP ownership and source code handover, and (5) post-launch support commitments.
Key Takeaways
- Never hire based on proposals alone. Run Lighthouse audits on the agency's own website and their client portfolio.
- The five-point verification checklist: Technical Excellence, Portfolio Verification, Communication Quality, Contract Terms, Post-Launch Support.
- Red flags: no live portfolio URLs, "we do everything" positioning, fixed price quotes without requirements discussion, and no post-launch plan.
- Green flags: founder/senior engineer involvement, milestone-based delivery, transparent pricing, and measurable case study outcomes.
1. The Five-Point Verification Checklist
- Technical Excellence: Run their website through Lighthouse. Check for pre-rendering, structured data, and Core Web Vitals compliance.
- Portfolio Verification: Request live URLs of recent projects. Test them with the same Lighthouse audit. Ask for specific metrics.
- Communication Quality: Evaluate response time, English clarity, and technical depth in pre-sales conversations.
- Contract Terms: Verify IP ownership transfers to you, source code is delivered, and payment is milestone-based.
- Post-Launch Support: Confirm maintenance plans, bug fix SLAs, and iteration sprint availability after launch.
2. Technical Excellence Verification
The single most reliable indicator of a web development company's quality is their own website. If they cannot build a fast, well-structured, SEO-optimized site for themselves, they will not build one for you. Run their site through Google Lighthouse and expect scores above 80 in all four categories. Check View Source — if the HTML is empty, they use client-side rendering with no pre-rendering strategy.
3. Portfolio and Case Study Verification
Ask for 3-5 live client URLs. Run each through PageSpeed Insights. Check for structured data using Google Rich Results Test. Verify that the sites actually rank for their target keywords. Any agency that only shows screenshots or Behance mockups is hiding poor production quality.
4. Red Flags to Walk Away From
- "We can build anything in any technology" — specialization indicates expertise; generalization indicates mediocrity.
- No live portfolio URLs — only screenshots, Dribbble shots, or "case studies" without links.
- Fixed price quotes provided before understanding your requirements — serious agencies scope before pricing.
- "We'll need 100% payment upfront" — standard is 30% advance, 30-40% at milestone, remainder at delivery.
- Account manager as your sole contact — you should interact with the developers building your product.
- No mention of performance, SEO, or accessibility in their proposal.
5. Green Flags That Indicate Quality
- Founder or senior engineer directly involved in your project.
- They audit your current website and provide specific improvement recommendations before proposing.
- Milestone-based delivery with demo checkpoints at each phase.
- Proactive discussion of SEO, performance, structured data, and pre-rendering.
- Clear post-launch maintenance and support terms included in the initial proposal.
- They ask smart questions about your business goals, not just design preferences.
6. Questions to Ask Before Signing
- What Lighthouse score can I expect for my website?
- Will the site use pre-rendering or server-side rendering?
- Who specifically will write the code for my project? Can I meet them?
- What happens if I need changes after launch? What are the hourly rates?
- Do I own the source code? When is it delivered?
- Can you show me 3 live client sites with performance data?
Frequently Asked Questions
Direct, technical answers to common queries

Ravii Saxena
Founder & Head of AI Engineering, Krinok
Ravii leads AI architecture and agentic engineering at Krinok. He has architected multi-agent platforms, autonomous voice bots, and high-scale RAG pipelines for startups and enterprise leaders globally.
Ready to Architect Your Enterprise AI Agent?
From initial proof-of-concept to production multi-agent systems with guardrails, Krinok helps ambitious founders and CTOs ship in weeks.