Developer Tools · head to head
Restate vs Yarn
Restate
Developer Tools
Durable execution engine in Rust with a free tier and low-latency workflows
- From
- Free
- Rated
- -
The short version
- Each has a real cost: 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.; Yarn yarn 2+ (Berry) has limited ESM support which can be a constraint for some projects
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Restate and Yarn actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Developer Tools).
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 Restate
- Durable execution
- Virtual objects
- Single binary runtime
- Multi-language SDKs
- Workflows and sagas
- Restate Cloud
Only in Yarn
Nothing recorded that Restate does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
Restate
- Payment or order flows where a crash between two external API calls must not double-charge or lose the ordernot Yarn
- AI agent loops that call tools over minutes or hours and must survive a deployment mid-runnot Yarn
- Replacing hand-rolled retry, idempotency key and outbox code across a set of microservicesnot Yarn
- A small team that wants durable workflows without operating a Temporal cluster and its databasenot Yarn
Yarn
- Monorepo teams managing dependencies across 50+ interdependent packagesnot Restate
- Enterprise JavaScript projects ensuring reproducible builds across CI/CDnot Restate
- Open-source projects with plugin ecosystems coordinating versionsnot Restate
- Teams requiring consistent package installs regardless of network conditionsnot Restate
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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.
Yarn
- Yarn 2+ (Berry) has limited ESM support which can be a constraint for some projects
- Smaller ecosystem and community compared to npm, though still substantial
Pricing, plan by plan
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
Yarn
FreeNo published plan breakdown. See the Yarn review.
Which should you pick?
Choose Restate if
- You need durable execution.
- You want to start without paying.
- You work on Linux, macOS, Web.
- You also want virtual objects.
Questions people ask
- Is Restate or Yarn better?
- Neither clearly leads. Restate starts at Free and Yarn at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Restate or Yarn?
- Restate starts at Free and Yarn at Free.
- Does Restate or Yarn run on more platforms?
- Restate runs on Linux, macOS, Web. Yarn runs on Web, Linux, macOS, Windows.
- Can I use Restate for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Restate best used for?
- Restate is most often used for payment or order flows where a crash between two external api calls must not double-charge or lose the order, ai agent loops that call tools over minutes or hours and must survive a deployment mid-run, replacing hand-rolled retry, idempotency key and outbox code across a set of microservices, a small team that wants durable workflows without operating a temporal cluster and its database. Of those, payment or order flows where a crash between two external api calls must not double-charge or lose the order and ai agent loops that call tools over minutes or hours and must survive a deployment mid-run are not what Yarn is typically brought in for.
- What can Restate do that Yarn cannot?
- Restate covers Durable execution, Virtual objects, Single binary runtime, Multi-language SDKs.
Answered from the vendors’ own pages
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.
Yarn: What is Yarn's main advantage over npm?
Yarn downloads packages in parallel, significantly reducing installation time. It uses a yarn.lock file for deterministic installs, ensuring identical package versions across machines and preventing version conflicts common with npm.
SourceRestate: 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.
Yarn: Can I use Yarn in offline environments?
Yes, Yarn supports secure offline environments. The yarn.lock file enables reproducible installs without requiring new downloads.
SourceRestate: 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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