Is Envoy or Zeta better?

Neither clearly leads. Envoy starts at Free and Zeta at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Envoy or Zeta?

Envoy has a free tier; the other does not. Paid plans start at Free for Envoy and On request for Zeta.

Does Envoy or Zeta run on more platforms?

Envoy runs on Web. Zeta runs on Web, API, Cloud, iOS, Android.

Can I use Envoy for free?

Yes. Envoy has a free tier, so you can try it without paying. Zeta starts at On request.

What is Envoy best used for?

Envoy is most often used for acting as the data plane under a service mesh or gateway api implementation, which is how the overwhelming majority of deployments use it, an edge or api gateway that needs per-route retry budgets, circuit breaking and outlier detection rather than round-robin proxying, migrating traffic between service versions or between a monolith and its replacement, using weighted splits and shadow traffic, standardising observability across a polyglot estate, so that latency, error rates and tracing look the same regardless of the language a service is written in. Of those, acting as the data plane under a service mesh or gateway api implementation, which is how the overwhelming majority of deployments use it and an edge or api gateway that needs per-route retry budgets, circuit breaking and outlier detection rather than round-robin proxying are not what Zeta is typically brought in for.

What can Envoy do that Zeta cannot?

Envoy covers xDS dynamic configuration, Protocol breadth, Filter chain architecture, Observability by default. Zeta covers Tachyon card processing, Real time authorisation, Rewards and offers engine, Core banking modules.

Technology · head to head

Envoy vs Zeta

Envoy

Technology

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
Rated: -

Full review Website

Zeta

Technology

Cloud native credit card processing and core banking from Bhavin Turakhia's Zeta

From: On request
Rated: -

Full review Website

The short version

Only Envoy has a free tier, so it costs nothing to try first.
Each has a real cost: 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.; Zeta it competes against card processors with decades of production track record, and in card processing an outage is a public event, so a shorter operational history is a genuine risk factor rather than a technicality.
They diverge on capability: Envoy covers xDS dynamic configuration, Zeta covers Tachyon card processing.
Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Envoy and Zeta actually diverge.

Attributes where Envoy and Zeta differ
Attribute	Envoy	Zeta
Starting price	Free	On request
Pricing model	open-source	quote
Free tier	Yes	No
Platforms	Web	Web, API, Cloud, iOS, Android

Identical on both: user rating (Not yet rated), category (Technology).

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 Envoy

xDS dynamic configuration
Protocol breadth
Filter chain architecture
Observability by default
Outlier detection
Traffic shaping
mTLS termination and origination
Hot restart

Only in Zeta

Tachyon card processing
Real time authorisation
Rewards and offers engine
Core banking modules
Programme configuration
Mobile and web SDKs
Fraud and controls
Cloud deployment

What people use each for

The jobs each tool is most often brought in to do.

Envoy

Acting as the data plane under a service mesh or Gateway API implementation, which is how the overwhelming majority of deployments use itnot Zeta
An edge or API gateway that needs per-route retry budgets, circuit breaking and outlier detection rather than round-robin proxyingnot Zeta
Migrating traffic between service versions or between a monolith and its replacement, using weighted splits and shadow trafficnot Zeta
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 Zeta

Zeta

A United States bank whose card platform makes launching a new rewards product a multi quarter vendor projectnot Envoy
An issuer that wants authorisation level controls and real time data rather than end of day filesnot Envoy
A large fintech launching a credit card programme at scale with custom product logicnot Envoy
A bank consolidating card and deposit processing onto one modern platformnot Envoy

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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.

Zeta

It competes against card processors with decades of production track record, and in card processing an outage is a public event, so a shorter operational history is a genuine risk factor rather than a technicality.
Contracts are enterprise scale and quoted with volume minimums, which puts it out of reach of small issuers who would otherwise benefit most from modern tooling.
A card portfolio migration runs twelve to twenty four months at minimum, during which the issuer runs two platforms and pays for both.
Zeta is a processor rather than a licence holder, so network membership, BIN sponsorship and regulatory obligations remain entirely with the issuer.
Public references for large live United States production volumes are fewer than the announcements imply, so diligence should insist on active account counts and uptime history rather than partnership press releases.

Pricing, plan by plan

Envoy

Free

No published plan breakdown. See the Envoy review.

Zeta

On request

Tachyon platform$undefined/year
- Quoted per institution, commonly on active accounts or transaction volume
- Implementation for a card portfolio migration measured in quarters to years
- Minimum volume commitments typical on enterprise contracts

Which should you pick?

Choose Envoy if

You need xds dynamic configuration.
You want to start without paying.
You also want protocol breadth.

Envoy review

Choose Zeta if

You need tachyon card processing.
You work on Web, API, Cloud, iOS, Android.
You also want real time authorisation.

Zeta review

Questions people ask

Is Envoy or Zeta better?: Neither clearly leads. Envoy starts at Free and Zeta at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Envoy or Zeta?: Envoy has a free tier; the other does not. Paid plans start at Free for Envoy and On request for Zeta.
Does Envoy or Zeta run on more platforms?: Envoy runs on Web. Zeta runs on Web, API, Cloud, iOS, Android.
Can I use Envoy for free?: Yes. Envoy has a free tier, so you can try it without paying. Zeta starts at On request.
What is Envoy best used for?: Envoy is most often used for acting as the data plane under a service mesh or gateway api implementation, which is how the overwhelming majority of deployments use it, an edge or api gateway that needs per-route retry budgets, circuit breaking and outlier detection rather than round-robin proxying, migrating traffic between service versions or between a monolith and its replacement, using weighted splits and shadow traffic, standardising observability across a polyglot estate, so that latency, error rates and tracing look the same regardless of the language a service is written in. Of those, acting as the data plane under a service mesh or gateway api implementation, which is how the overwhelming majority of deployments use it and an edge or api gateway that needs per-route retry budgets, circuit breaking and outlier detection rather than round-robin proxying are not what Zeta is typically brought in for.
What can Envoy do that Zeta cannot?: Envoy covers xDS dynamic configuration, Protocol breadth, Filter chain architecture, Observability by default. Zeta covers Tachyon card processing, Real time authorisation, Rewards and offers engine, Core banking modules.

Answered from the vendors’ own pages

Envoy: 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.

Zeta: Which Zeta is this?

The banking technology company founded by Bhavin Turakhia, which builds the Tachyon card processing and core banking platform. Not any similarly named payroll or accounting product.

Envoy: 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.

Zeta: What is its strongest use case?

United States credit card issuing and processing, where legacy platforms make product changes slow and expensive.

Envoy: 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.

Zeta: Does Zeta provide the BIN or licence?

No. It processes. Network membership, BIN sponsorship and regulatory obligations stay with the issuer.

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.

Envoy vs Zeta

Envoy

Zeta

The short version

Where they differ

What each one covers

Only in Envoy

Only in Zeta

What people use each for

Envoy

Zeta

Where each one falls short

Envoy

Zeta

Pricing, plan by plan

Envoy

Zeta

Which should you pick?

Choose Envoy if

Choose Zeta if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Envoy

More on Zeta

Keep looking

Other head to heads