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Automation Integration · head to head

Prefect vs Restate

Prefect logo

Prefect

Automation Integration

Python-first workflow orchestration that heals itself

From
Free
Rated
-
Full reviewWebsite
Restate logo

Restate

Developer Tools

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Prefect limited to Python-based workflows; other languages require API calls; 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: Prefect covers Python function decorators, Restate covers Durable execution.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Prefect and Restate actually diverge.

Attributes where Prefect and Restate differ
AttributePrefectRestate
Pricing modelFreemium with per-user and usage-based tiersPer month by durable action count
PlatformsCloud, Self-hosted, VPCLinux, macOS, Web
CategoryAutomation IntegrationDeveloper 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 Prefect

  • Python function decorators
  • Automatic resilience
  • Flexible deployment
  • Observable execution
  • Multiple scheduling
  • Webhooks
  • Open-source core

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.

Prefect

  • Orchestrating data pipeline workflows in Pythonnot Restate
  • Managing ML model training and inference jobsnot Restate
  • Building ETL and event-driven automationnot Restate
  • Monitoring and alerting on workflow healthnot Restate

Restate

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

Where each one falls short

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

Prefect

  • Limited to Python-based workflows; other languages require API calls
  • Hobby free tier severely limited for production use
  • Team plan billing per user scales quickly with team size
  • Less visual workflow builder compared to some competitors
  • Smaller ecosystem of pre-built connectors than alternatives

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

Prefect

Free
  • HobbyFree
    • 2 users and 5 deployments
    • 500 minutes serverless monthly
    • 7-day run retention
  • Starter$100/month
    • 3 users and 20 deployments
    • 75 hours serverless compute
    • Bring-your-own infrastructure
  • Team$100/user/month
    • 4-8 users per plan tier
    • 100 deployments
    • 225 hours serverless monthly
  • Enterprise$null/custom
    • SSO and SAML authentication
    • Role-based access control
    • Multiple workspaces

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 Prefect if

  • You need python function decorators.
  • You want to start without paying.
  • You work on Cloud, Self-hosted, VPC.
  • You also want automatic resilience.
Prefect 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 Prefect or Restate better?
Neither clearly leads. Prefect 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, Prefect or Restate?
Prefect starts at Free and Restate at Free.
Does Prefect or Restate run on more platforms?
Prefect runs on Cloud, Self-hosted, VPC. Restate runs on Linux, macOS, Web.
Can I use Prefect for free?
Both have a free tier, so you can try either at no cost before committing.
What is Prefect best used for?
Prefect is most often used for orchestrating data pipeline workflows in python, managing ml model training and inference jobs, building etl and event-driven automation, monitoring and alerting on workflow health. Of those, orchestrating data pipeline workflows in python and managing ml model training and inference jobs are not what Restate is typically brought in for.
What can Prefect do that Restate cannot?
Prefect covers Python function decorators, Automatic resilience, Flexible deployment, Observable execution. Restate covers Durable execution, Virtual objects, Single binary runtime, Multi-language SDKs.

Answered from the vendors’ own pages

Prefect: What is included in the Hobby free plan?

Hobby includes 2 users, 5 deployments, 500 minutes of serverless compute monthly, and 7-day run retention.

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.

Prefect: What is the difference between Starter and Team plans?

Starter is $100/month for 3 users and 20 deployments. Team is $100 per user per month for 4-8 users and 100 deployments.

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.

Prefect: Can I deploy Prefect in my own infrastructure?

Yes, Starter and higher plans support bring-your-own-compute infrastructure and VPC deployments.

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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