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Close vs Envoy

Close logo

Close

Technology

The inside sales CRM of choice for startups & SMBs

From
$9/month
Rated
-
Full reviewWebsite
Envoy logo

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 reviewWebsite

The short version

  • Only Envoy has a free tier, so it costs nothing to try first.
  • Each has a real cost: Close hidden costs beyond subscription: calling charges (~$0.02/minute), SMS usage fees, phone numbers ($1-5/month), AI call assistant ($50/month + $0.02/min transcription); 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.
  • They diverge on capability: Close covers Built-in calling, Envoy covers xDS dynamic configuration.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Close and Envoy actually diverge.

Attributes where Close and Envoy differ
AttributeCloseEnvoy
Starting price$9/monthFree
Pricing modelUnknownopen-source
Free tierNoYes
PlatformsWeb, iOS, AndroidWeb
Founded2013Unknown

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 Close

  • Built-in calling
  • Email automation
  • SMS messaging
  • Pipeline management
  • Lead management
  • Activity tracking
  • Reporting
  • Mobile app

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.

Close

  • Inside salesnot Envoy
  • Outbound salesnot Envoy
  • Lead managementnot Envoy
  • Sales engagementnot Envoy
  • Pipeline trackingnot 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 Close
  • An edge or API gateway that needs per-route retry budgets, circuit breaking and outlier detection rather than round-robin proxyingnot Close
  • Migrating traffic between service versions or between a monolith and its replacement, using weighted splits and shadow trafficnot Close
  • 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 Close

Where each one falls short

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

Close

  • Hidden costs beyond subscription: calling charges (~$0.02/minute), SMS usage fees, phone numbers ($1-5/month), AI call assistant ($50/month + $0.02/min transcription)
  • No built-in lead lists, company intelligence, or contact enrichment; must source leads separately
  • Limited marketing automation compared to competitors like HubSpot; lacks lead scoring and nurturing campaigns
  • Calling cost at scale can double effective monthly cost for high-volume SDR teams making 50+ calls per day
  • Limited customization of data model compared to Salesforce; cannot create fully custom objects or complex relationships

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

Close

$9/month
  • Solo$9/month (annual)
    • 1 user only
    • 10,000 leads max
    • Calling, email, SMS
  • Essentials$35/month (annual)
    • Unlimited contacts
    • Team collaboration
    • 1,000 AI credits/month
  • Growth$99/month (annual)
    • Automation workflows
    • Power dialer
    • Bulk email
  • Scale$139/month (annual)
    • Role-based permissions
    • Predictive dialer
    • Unlimited recording

Envoy

Free

No published plan breakdown. See the Envoy review.

Which should you pick?

Choose Close if

  • You need built-in calling.
  • You work on Web, iOS, Android.
  • You also want email automation.
Close review

Choose Envoy if

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

Questions people ask

Is Close or Envoy better?
Neither clearly leads. Close starts at $9/month and Envoy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Close or Envoy?
Envoy has a free tier; the other does not. Paid plans start at $9/month for Close and Free for Envoy.
Does Close or Envoy run on more platforms?
Close runs on Web, iOS, Android. Envoy runs on Web.
Can I use Envoy for free?
Yes. Envoy has a free tier, so you can try it without paying. Close starts at $9/month.
What is Close best used for?
Close is most often used for inside sales, outbound sales, lead management, sales engagement. Of those, inside sales and outbound sales are not what Envoy is typically brought in for.
What can Close do that Envoy cannot?
Close covers Built-in calling, Email automation, SMS messaging, Pipeline management. Envoy covers xDS dynamic configuration, Protocol breadth, Filter chain architecture, Observability by default.

Answered from the vendors’ own pages

Close: What are Close's pricing plans and what do they include?

Close offers four plans: Solo ($9-19/user/month), Essentials ($35-49), Growth ($99-109), and Scale ($139-149). All include calling, email, SMS, and Chloe AI agent access. Essentials adds unlimited contacts and team collaboration. Growth adds automation, power dialer, and custom activities. Scale adds role-based permissions and unlimited recording. Annual billing saves up to 50%.

Source
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.

Close: What are the hidden costs in Close's pricing beyond the subscription?

Close charges usage-based fees for calling (~$0.02 per minute), SMS charges per message, and phone number rentals ($1-5/month). The AI Call Assistant add-on costs $50/month plus $0.02 per minute for transcription. Heavy outbound calling teams can see their total costs increase 30-50% beyond the base seat price.

Source
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.

Close: What is Chloe, Close's AI sales agent, and what can it do?

Chloe is an AI sales agent built into Close that automatically calls leads, qualifies prospects through real conversations, and can book meetings while updating the CRM automatically. Chloe features AI-generated call summaries, transcripts, and action items automatically logged to contacts.

Source
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.

Close: Does Close include lead lists, data enrichment, or contact information?

No. Close does not provide built-in lead lists, company intelligence, or contact enrichment features. Organizations must source leads separately or use third-party data providers. This differs from platforms like HubSpot which include integrated lead databases.

Source
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.

Close: What communication features does Close include?

Close includes built-in calling with automatic call logging, email templates and bulk email capabilities, SMS messaging with tracking and automation, email syncing with Gmail, and automated follow-up workflows. All communication happens within the CRM platform.

Source
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.

Close: Does Close have marketing automation capabilities?

Close's marketing automation features are limited compared to HubSpot. It includes basic email sequences, task reminders, and workflow automation, but lacks advanced lead scoring, nurturing campaigns, and detailed marketing analytics. Organizations requiring extensive marketing automation need separate tools.

Source
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