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Web Development · head to head

HTMX vs Restate

HTMX logo

HTMX

Web Development

Lightweight JavaScript library enabling AJAX, WebSockets, and server-sent events in HTML

From
Free
Free plan
Yes
Full reviewWebsite
Restate logo

Restate

Developer Tools

Durable execution engine in Rust with a free tier and low-latency workflows

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: HTMX best suited for server-rendered architectures, not pure client-side SPAs; Restate the runtime is under a Business Source Licence rather than an open source licence, so building a competing managed offering on it is prohibited and some procurement functions will reject it on licence grounds alone.
  • They diverge on capability: HTMX covers AJAX requests, Restate covers Durable execution.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which HTMX and Restate actually diverge.

Attributes where HTMX and Restate differ
AttributeHTMXRestate
Pricing modelopen-sourcePer month by durable action count
PlatformsWebLinux, macOS, Web
CategoryWeb DevelopmentDeveloper Tools

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 HTMX

  • AJAX requests
  • HTTP verb support
  • DOM targeting
  • Swap strategies
  • WebSocket support
  • Server-sent events
  • Out-of-band updates

Only in Restate

  • Durable execution
  • Virtual objects
  • Single binary runtime
  • Multi-language SDKs
  • Workflows and sagas
  • Restate Cloud

What people use each for

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

HTMX

  • Building interactive applications without JavaScript framework complexitynot Restate
  • Server-rendered applications requiring dynamic updatesnot Restate
  • Adding interactivity to existing server-side applicationsnot Restate
  • Hypermedia-driven applications using HTML-first approachesnot Restate

Restate

  • Payment or order flows where a crash between two external API calls must not double-charge or lose the ordernot HTMX
  • AI agent loops that call tools over minutes or hours and must survive a deployment mid-runnot HTMX
  • Replacing hand-rolled retry, idempotency key and outbox code across a set of microservicesnot HTMX
  • A small team that wants durable workflows without operating a Temporal cluster and its databasenot HTMX

Where each one falls short

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

HTMX

  • Best suited for server-rendered architectures, not pure client-side SPAs
  • Limited client-side state management capabilities compared to frameworks
  • Smaller ecosystem with fewer third-party libraries and tools
  • Learning curve for developers from JavaScript framework backgrounds

Restate

  • The runtime is under a Business Source Licence rather than an open source licence, so building a competing managed offering on it is prohibited and some procurement functions will reject it on licence grounds alone.
  • Restate Cloud jumps from a free fifty thousand actions straight to 300 US dollars a month for twenty million, so a workload sitting at a few hundred thousand actions pays enterprise-shaped money for hobby-shaped volume.
  • It is a young project against Temporal’s established base, so hiring engineers who already know it is unrealistic and the answer to most questions is in the docs rather than on Stack Overflow.
  • The programming model requires structuring code around durable handlers and virtual objects, which is a genuine rewrite for existing services rather than a library you add.
  • The single-binary simplicity that makes small deployments cheap also means fewer operational knobs at very large scale than a system designed as separable components.

Pricing, plan by plan

HTMX

Free

No published plan breakdown. See the HTMX review.

Restate

Free
  • FreeFree
    • Fifty thousand durable actions per month
    • No credit card required
    • Community support
  • Starter$300/month
    • Twenty million actions per month
    • Two hundred actions per second, bursting to one thousand
    • Twenty GB storage
  • Pro$1000/month
    • Fifty million actions per month
    • Five hundred actions per second, bursting to two thousand
    • Fifty GB storage
  • Enterprise$undefined/year
    • Negotiated volume
    • Twenty-four seven P0 support
    • 99.99 per cent SLA

Which should you pick?

Choose HTMX if

  • You need ajax requests.
  • You want to start without paying.
  • You also want http verb support.
HTMX review

Choose Restate if

  • You need durable execution.
  • You want to start without paying.
  • You work on Linux, macOS, Web.
  • You also want virtual objects.
Restate review

Questions people ask

Is HTMX or Restate better?
Neither clearly leads. HTMX starts at Free and Restate at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, HTMX or Restate?
HTMX starts at Free and Restate at Free.
Does HTMX or Restate run on more platforms?
HTMX runs on Web. Restate runs on Linux, macOS, Web.
Can I use HTMX for free?
Both have a free tier, so you can try either at no cost before committing.
What is HTMX best used for?
HTMX is most often used for building interactive applications without javascript framework complexity, server-rendered applications requiring dynamic updates, adding interactivity to existing server-side applications, hypermedia-driven applications using html-first approaches. Of those, building interactive applications without javascript framework complexity and server-rendered applications requiring dynamic updates are not what Restate is typically brought in for.
What can HTMX do that Restate cannot?
HTMX covers AJAX requests, HTTP verb support, DOM targeting, Swap strategies. Restate covers Durable execution, Virtual objects, Single binary runtime, Multi-language SDKs.

Answered from the vendors’ own pages

HTMX: How big is the HTMX JavaScript library?

HTMX is only 16 kilobytes minified and gzipped with zero external dependencies.

Source
Restate: Is Restate open source?

The SDKs are MIT. The runtime is under a Business Source Licence, which permits self-hosting but not offering it as a competing service.

HTMX: Can HTMX work with JSON APIs?

While HTMX is optimized for HTML responses, it can work with JSON through additional configuration and response handling.

Source
Restate: How does it compare with Temporal?

Same problem, different shape: one Rust binary with embedded storage instead of a server plus database plus workers, and lower per-step latency.

HTMX: Does HTMX support real-time features like WebSockets?

Yes, HTMX includes support for WebSockets and server-sent events for real-time bidirectional communication.

Source
Restate: Is there a free tier?

Yes, fifty thousand durable actions a month on Restate Cloud with no card required.

Restate: Which languages are supported?

TypeScript, Java, Kotlin, Go, Python and Rust.

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