Sydney web design agency mobile performance benchmark
We tested 9 Sydney web design agency homepages with Google's PageSpeed Insights API (mobile, lab data) on 2026-09-02. Numbers are reproducible — re-run the same URLs in PSI to verify.
This is original research, not scraped rankings. We publish the methodology so journalists, bloggers, and business owners can cite it.
Key findings
- Average mobile performance score: 63/100 across 8 sites that returned data (1 did not respond to the test).
- 0 of 8 met the lab thresholds for LCP (< 2.5s) and CLS (< 0.1).
- 1 of 8 had enough real-user traffic for Chrome to report field INP.
- D-LAB (d-lab.codes) scored 70/100 on mobile.
Full results
| Agency | Mobile score | LCP (s) | CLS | INP (field) | LCP+CLS pass |
|---|---|---|---|---|---|
| D-LAB | 70 | 6.79 | 0 | no field data | No |
| Humaan | 60 | 10.76 | 0 | 236 | No |
| Bonfire | 50 | 6.94 | 0 | no field data | No |
| Webcoda | 54 | 5.4 | 0.016 | no field data | No |
| Impressive Digital | 56 | 14.14 | 0 | no field data | No |
| Safari Digital | 68 | 4.26 | 0.003 | no field data | No |
| Marketing Sweet | 51 | 6.15 | 0 | no field data | No |
| Sydney Web Design | 92 | 2.77 | 0 | no field data | No |
| Redback | — | — | — | no field data | — |
Methodology
- Tool: PageSpeed Insights v5 API, mobile strategy, performance category.
- Pages tested: Each agency's homepage (https://domain/).
- Metrics: Lighthouse performance score, LCP and CLS from lab data; INP from Chrome UX Report field data only.
- On INP: INP can only be measured from real visitors. Sites without enough Chrome traffic show "no field data" rather than a lab substitute — Time to Interactive is not INP, and reporting it as such would be misleading. Pass/fail below therefore reflects LCP and CLS only.
- Limitations: Lab scores vary by run; we snapshot one point in time. Does not measure UX, SEO, or conversion.
Why this matters for Sydney businesses
Most buyers compare agencies on portfolio and price — but site speed is a trust signal. If an agency's own homepage loads slowly on mobile, that's a data point worth asking about before you hire them.
For a deeper dive on fixing performance, see our web performance optimization guide.
D-LAB is a Sydney web design studio building fast custom sites with React and Next.js. Get in touch if you want a performance-first rebuild.
