Compare Editions

Aster Lang ships in three editions. All three run the same engine and the same language — what differs is who operates the infrastructure and where the data lives.

Pricing

For self-serve teams, Cloud offers Free and Pro plans with public pricing at aster-lang.cloud/pricing. Enterprise (self-hosted) pricing depends on tenancy size, evaluation volume, and data residency — talk to sales for a quote.

At a glance

	Open Source	Cloud (SaaS)	Enterprise (Self-Hosted)
Who runs it	You — on your machine	We — at aster-lang.cloud	You — in your VPC/cluster
License	Apache-2.0	Subscription	Subscription + perpetual fallback
Best for	Building, learning, embedding the parser	Teams who want managed multi-tenant	Regulated industries, data residency, air-gapped
Get started	npm i @aster-cloud/aster-lang-ts	aster-lang.cloud	Contact sales

Feature comparison

Language & engine

	Open Source	Cloud	Enterprise
Multi-language CNL (English / 中文 / Deutsch)	✅	✅	✅
Java/Truffle reference engine	✅	✅	✅
TypeScript engine for browser/Node	✅	✅	✅
LSP / VS Code extension	✅	✅	✅
Custom language pack authoring	✅	✅	✅

Policy execution

	Open Source	Cloud	Enterprise
REST /evaluate endpoint	self-host	✅	✅
GraphQL endpoint	self-host	✅	✅
WebSocket streaming	self-host	✅	✅
Batch evaluation	self-host	✅	✅
Decision trace (?trace=true)	✅	✅	✅

AI assistance

	Open Source	Cloud	Enterprise
AI policy drafting (SSE streaming)	BYO key	✅	BYO key / on-prem LLM
AI policy explanation	BYO key	✅	BYO key / on-prem LLM
Compile-validate loop	✅	✅	✅

Governance & audit

	Open Source	Cloud	Enterprise
Hash-chained audit log (SHA-256)	✅	✅	✅
Deterministic replay (any historical decision)	✅	✅	✅
Tenant isolation	n/a	✅	✅
RBAC (admin / author / reviewer / viewer)	self-implement	✅	✅
HMAC request signing	✅	✅	✅

Operations

	Open Source	Cloud	Enterprise
SLA	community	99.9% (target)	contractual
Multi-region failover	n/a	✅	customer-defined
Air-gapped deployment	✅	❌	✅
Kubernetes (K3S) GitOps via ArgoCD	✅	✅ (managed)	✅
Helm chart	✅	n/a	✅
Native Image build (sub-second boot)	✅	✅	✅

Compliance & data residency

	Open Source	Cloud	Enterprise
Your code stays under your license	✅ Apache-2.0	✅	✅
Data Processing Agreement (DPA)	n/a	public template	bespoke
DSAR / right-to-be-forgotten	n/a	✅	✅
Telemetry transparency	docs	docs	docs + customer toggles
Data residency choice	wherever you deploy	EU / US / APAC pools	your jurisdiction
SOC 2 / ISO 27001	n/a	on the roadmap	inheritable from customer

Support

	Open Source	Cloud	Enterprise
Community (GitHub Issues, Discord)	✅	✅	✅
Business-hour email support	n/a	✅	✅
24×7 incident channel	n/a	add-on	✅
Onboarding & training	docs only	docs + chat	dedicated engineer
Custom language-pack engineering	DIY	DIY	included

Which edition fits you?

🛠 Open Source

You're a developer evaluating the language, embedding the parser in your own product, or running a single team's policies on your own infrastructure.

• Apache-2.0 — fork it, ship it, sell on top of it
• npm install @aster-cloud/aster-lang-ts to get the compiler
• Self-host the API server from this repo

→ Start in the Playground → 5-Minute Quick Start

☁️ Cloud (SaaS)

You want the managed experience — multi-tenant, AI assistance, hosted audit trail — without operating Kubernetes yourself.

• Sign up, paste a rule, hit Evaluate
• Built-in AI drafting & explanation
• Hash-chained audit log out of the box
• Custom domain vocabularies — Free: none · Pro: 5,000 terms · Enterprise: unlimited

→ Start free on aster-lang.cloud →

🏢 Enterprise (Self-Hosted)

You're in a regulated industry — finance, healthcare, government, or anywhere data residency is non-negotiable.

• Runs in your VPC, your K3S, your air-gapped cluster
• Inherit your existing SOC 2 / ISO 27001 controls
• Bespoke DPA + 24×7 incident channel

→ Read the Enterprise overview → Talk to sales

Frequently asked

Is the engine the same in all three editions? Yes. The Java/Truffle reference engine and the TypeScript engine are both open source. Cloud and Enterprise add operations, governance, and support — not language features.

Can I move from Cloud to Enterprise later? Yes. Policies are portable plain-text source; audit chains export as JSONL.

Do you offer an evaluation / proof-of-concept license? For Enterprise, yes — typically 30 days with engineering support. Email us with your use case.

What about pricing?Talk to us — we'll size based on evaluation volume, tenants, and residency requirements. Open Source remains free under Apache-2.0.

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