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Astro vs Flutter

Based on 59 and 1 real audits

View Astro details | View Flutter details
MetricAstroFlutterWinner
Performance5585Flutter
Accessibility9292Tie
Best Practices91100Flutter
SEO95100Flutter
Security6887Flutter
TTFB304ms61msFlutter
Composite7788Flutter
Performance
Astro
55
Flutter
85
Accessibility
Astro
92
Flutter
92
Security
Astro
68
Flutter
87
SEO
Astro
95
Flutter
100
Composite
Astro
77
Flutter
88

Flutter outperforms Astro in 6 of 7 categories, with a stronger composite score (88 vs 77). Astro leads in no categories.

When to choose Astro

Astro doesn't clearly lead Flutter in any category on the sampled sites — pick it based on developer experience, ecosystem, or existing team skills rather than the audit scores.

When to choose Flutter

Choose Flutter when your primary concern is server response time and performance. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 59 audited Astro sites and 1 audited Flutter sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

Small sample: one or both technologies have fewer than 10 audited sites. Treat these numbers as directional — medians stabilize around 20–30 audits per side.

FAQ

Which is faster, Astro or Flutter?
Based on real BeaverCheck audits, Flutter sites score higher on Lighthouse performance (85 vs 55 on average).
Which has better security, Astro or Flutter?
Flutter sites score higher on security analysis (87 vs 68 on average).
Which has better accessibility, Astro or Flutter?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Astro (92 vs 92). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, Astro or Flutter?
Flutter sites score higher on Lighthouse SEO signals (100 vs 95 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), Astro or Flutter?
Flutter sites show lower Time to First Byte (61 ms vs 304 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose Astro or Flutter for my website?
Both platforms have trade-offs. Flutter scores higher on overall composite score while Astro may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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