Web Development · head to head
Astro vs Envoy
Astro
Web Development
Web framework for content-driven sites shipping minimal JavaScript by default
- From
- Free
- Free plan
- Yes
Envoy
Developer Tools
A high-performance L7 proxy written in C++ that is configured by an API rather than a config file, and is usually deployed under a control plane.
- From
- Free
- Free plan
- Yes
The short version
- Astro is a free, open-source web framework.
- Both are free.
- Where Astro falls short: smaller ecosystem compared to Next.js; fewer third-party component libraries and integrations readily available.
- Prices and features on this page were last checked on 13 November 2026.
Where they differ
Only the attributes on which Astro and Envoy actually diverge.
Identical on both: starting price (Free), pricing model (Open-source), free tier (Yes).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Astro
Nothing recorded that Envoy does not also cover.
Only in Envoy
- xDS dynamic configuration
- Protocol breadth
- Filter chain architecture
- Observability by default
- Outlier detection
- Traffic shaping
- mTLS termination and origination
- Hot restart
What people use each for
The jobs each tool is most often brought in to do.
Astro
- Marketing websites and landing pages prioritising performance and SEOnot Envoy
- Documentation and blog platforms with high page volumesnot Envoy
- E-commerce storefronts where page speed affects conversion ratesnot Envoy
- Portfolio and personal websites showcasing static content with minimal interactivitynot Envoy
- Multi-language sites requiring efficient content management and translationnot Envoy
- JAMstack projects integrating headless CMS platforms (Contentful, Sanity, Strapi)not Envoy
Envoy
- Acting as the data plane under a service mesh or Gateway API implementation, which is how the overwhelming majority of deployments use itnot Astro
- An edge or API gateway that needs per-route retry budgets, circuit breaking and outlier detection rather than round-robin proxyingnot Astro
- Migrating traffic between service versions or between a monolith and its replacement, using weighted splits and shadow trafficnot Astro
- Standardising observability across a polyglot estate, so that latency, error rates and tracing look the same regardless of the language a service is written innot Astro
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Astro
- Limited to static site generation and server-side rendering; real-time applications requiring constant client-server communication are unsuitable
- Smaller ecosystem compared to Next.js; fewer third-party component libraries and integrations readily available
- Build time increases with large content volumes (1,000+ pages); incremental builds not yet as optimised as Gatsby or Next.js
- API routes and serverless functions are less mature than Next.js; complex backend integrations require additional tooling
Envoy
- The configuration surface is very large and hand-written bootstrap YAML runs to hundreds of lines for routing that Nginx expresses in twenty, which is why nearly every production deployment sits under a control plane and inherits that control plane's constraints as well
- xDS is the real API and it is not stable in the comfortable sense; the v2 API set was removed outright, resource types continue to be deprecated, and your control plane and Envoy binaries have to be upgraded roughly in step or the proxies stop accepting configuration
- Extending it properly means writing a C++ filter and building and maintaining your own Envoy binary; the alternatives are Lua, which adds per-request overhead, and proxy-wasm, whose ABI has remained effectively experimental for years with a real performance cost
- At sidecar density the per-proxy memory and CPU footprint is a measurable share of cluster capacity, since thousands of workloads each carry a full proxy, and this is precisely the cost that has pushed mesh projects towards node-level or ambient architectures
- There is no single vendor selling support for Envoy itself; you get the community plus control-plane vendors such as Solo.io and Tetrate, so an Envoy-level production bug is your own engineers in a C++ codebase unless a support contract happens to cover it
- Diagnosing why a request got a particular response involves reading config dumps, the stats endpoint and the RESPONSE_FLAGS codes in access logs rather than a readable error, which is a specific skill you must hire or spend months growing
Pricing, plan by plan
Astro
FreeNo published plan breakdown. See the Astro review.
Envoy
FreeNo published plan breakdown. See the Envoy review.
Which should you pick?
Choose Astro if
- You want to start without paying.
- You work on Web, API, Vercel, Netlify, AWS.
Choose Envoy if
- You need xds dynamic configuration.
- You want to start without paying.
- You also want protocol breadth.
Questions people ask
- Is Astro or Envoy better?
- Neither clearly leads. Astro starts at Free and Envoy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Astro or Envoy?
- Astro starts at Free and Envoy at Free.
- Does Astro or Envoy run on more platforms?
- Astro runs on Web, API, Vercel, Netlify, AWS. Envoy runs on Web.
- Can I use Astro for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Astro best used for?
- Astro is most often used for marketing websites and landing pages prioritising performance and seo, documentation and blog platforms with high page volumes, e-commerce storefronts where page speed affects conversion rates, portfolio and personal websites showcasing static content with minimal interactivity. Of those, marketing websites and landing pages prioritising performance and seo and documentation and blog platforms with high page volumes are not what Envoy is typically brought in for.
- What can Astro do that Envoy cannot?
- Envoy covers xDS dynamic configuration, Protocol breadth, Filter chain architecture, Observability by default.
Answered from the vendors’ own pages
Astro: Is Astro free?
Yes. Astro is free and open-source under MIT licence. Deployment hosting (Vercel, Netlify, Cloudflare, AWS) may incur costs depending on usage.
SourceEnvoy: Should I run Envoy on its own, or under a control plane?
Almost always under one. Directly authoring xDS or static bootstrap configuration is viable for a handful of routes and becomes unmanageable beyond that. Envoy Gateway, Istio, Contour, Gloo and Consul all exist to generate that configuration for you.
Astro: Can I use React components in Astro?
Yes. Astro supports React, Vue, Svelte, Preact, and Solid components. Components are server-rendered by default; add client: directives to enable client-side interactivity only where needed.
SourceEnvoy: How does it compare with Nginx or HAProxy?
Envoy is dynamically configured over an API and instrumented far more heavily; Nginx and HAProxy are faster to configure and lighter for straightforward reverse proxying. If you never need to change routing without a reload, Envoy is more machinery than the problem requires.
Astro: How does Astro compare to Next.js for performance?
Astro achieves superior Core Web Vitals scores (66% pass rate vs Next.js 30%) by shipping minimal JavaScript. Next.js defaults to client-side rendering; Astro renders on the server by default.
SourceEnvoy: What does it cost?
Nothing to licence; it is Apache 2.0 and there is no paid edition. The cost is engineering time and, for most organisations, a commercial control plane or cloud service that packages it.
Envoy: Can I write extensions without C++?
You can write Lua filters or proxy-wasm modules in Rust, Go, C++ or AssemblyScript. Both carry per-request overhead compared with a native filter, and the Wasm path has been slower to stabilise than the project originally projected.
Envoy: Is it a CNCF project?
Yes, it is a graduated CNCF project licensed under Apache 2.0, which means the trademark and governance sit with the foundation rather than with Lyft or any vendor.
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