If you run a web agency, you’ve probably shipped dozens of WordPress sites. It works. Clients know it. Plugins exist for everything.
But you’ve also dealt with the other side: hacked sites, plugin conflicts, slow load times, and the maintenance treadmill that eats into your margins.
Astro is a modern static site generator that’s gaining serious traction with agencies. Here’s an honest comparison of both options for agency work in 2026.
Performance: Not Even Close
WordPress serves dynamic PHP on every request. Even with caching plugins, you’re fighting the architecture. A typical WordPress site scores 40-70 on Lighthouse out of the box.
Astro generates static HTML at build time. Zero JavaScript ships to the browser by default. Every Wumty template achieves top Lighthouse performance without any optimization work from you.
For agencies, this matters because:
- Faster sites convert better (Google’s data shows a 1-second delay reduces conversions by 7%)
- Core Web Vitals directly affect search rankings
- You stop spending hours on “make it faster” client requests
Security: Static Sites Don’t Get Hacked
WordPress powers 43% of the web, which makes it the #1 target for attackers. Every plugin is an attack surface. You need to manage updates, security plugins, and firewall rules for every client site.
Astro sites are pre-built HTML files. There’s no database to inject into, no admin panel to brute-force, no PHP to exploit. Deployment is a CDN upload. The attack surface is essentially zero.
This eliminates an entire category of agency overhead: emergency “my site got hacked” calls.
Maintenance and Total Cost
WordPress requires ongoing maintenance: core updates, plugin updates, PHP version management, database optimization, SSL renewals, hosting monitoring. Most agencies charge $50-200/month per site for this, but it still eats time.
Astro sites deploy to Netlify, Vercel, or Cloudflare Pages for free (or nearly free). There’s no server to maintain, no database to back up, no plugins to update. Once deployed, the site just works.
| Cost Factor | WordPress | Astro |
|---|---|---|
| Hosting | $10-50/mo per site | Free-$20/mo |
| Maintenance | 2-4 hrs/mo per site | Near zero |
| Security monitoring | Ongoing | Not needed |
| Plugin licenses | $200-500/yr per site | $0 |
Content Editing: The WordPress Advantage (That’s Shrinking)
WordPress still wins on client-friendly editing. The block editor is visual, familiar, and requires no technical knowledge.
Astro uses Markdown files and content collections. For developer-led agencies where you control the content pipeline, this is actually faster. For agencies that hand off full editing to clients, you’ll need a headless CMS like Tina, Decap, or Sanity.
The gap is closing fast. Astro’s Content Collections API with Zod validation catches content errors at build time instead of production, which is something WordPress can’t do.
Agency Scalability: Monorepo vs Multisite
WordPress Multisite exists, but it’s fragile. Shared plugins break individual sites. Updates cascade unpredictably. Most agencies avoid it and manage separate installs.
Astro with a monorepo architecture (like Wumty’s Agency Kit) lets you share layouts, components, and config across all client sites while keeping each site independently deployable. Change a shared component once, every site gets the update on next build.
When to Stay with WordPress
Be honest: WordPress is still the better choice if:
- Your clients need to edit content daily without developer involvement
- You rely heavily on specific WordPress plugins (WooCommerce, LMS, etc.)
- Your team doesn’t have JavaScript/TypeScript experience
When to Switch to Astro
Astro is the better choice if:
- Performance and SEO rankings matter to your clients
- You’re tired of the WordPress maintenance treadmill
- You want to scale to 10+ client sites without proportional overhead
- Your agency controls the content pipeline
Making the Switch
You don’t have to migrate everything at once. Start with your next new client project on Astro. The Wumty Starter Kit is free and gets you a production-ready foundation with top Lighthouse performance out of the box.
For agencies managing multiple sites, the Agency Kit includes the monorepo architecture, shared packages, and migration tooling to move existing sites over incrementally.
The agencies that switch early build a compounding advantage: every site they ship is faster, cheaper to maintain, and more secure than the competition still running WordPress.
The bottom line is straightforward: WordPress trades long-term maintenance overhead for short-term familiarity, while Astro trades a steeper initial learning curve for compounding operational advantages. For agencies that control their content pipeline and care about performance, security, and scalability, the math favors Astro - and the gap widens with every site you add to your portfolio.
Check out our pricing page to compare kits, or read about how we manage 15+ sites from one codebase.
Ready to leave WordPress behind? Start migrating with the free Starter Kit, or jump straight to the Agency Kit for unlimited client sites from one codebase.