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Editions

Four ways to run Arka

Whether you're a solo developer prototyping on a laptop or an enterprise serving millions of messages a day — Arka scales with you through four purpose-built editions.

Open source · Apache 2.0

OSS Individual

Free, open-source edition for solo developers, hobbyists, and indie builders. Everything you need to orchestrate communication flows on your own machine or a single server.

Download OSS → Read docs
  • Single-user installation, SQLite or file-based storage
  • All five channel connectors: Email, WhatsApp, SMS, Slack, Teams
  • Visual flow builder and declarative flow definitions
  • Local webhook endpoint and scheduled triggers
  • Up to 1,000 messages / day soft cap (configurable)
  • Community forum and GitHub issue tracker support
Open source · Apache 2.0

OSS Small Firm

Free, self-hosted edition for teams of up to 25 users. Includes multi-user roles, team inboxes, and a shared flow library — ideal for small agencies, startups, and consultancies.

Download OSS → Read docs
  • Up to 25 named users with role-based access control
  • Shared team inbox and flow library
  • PostgreSQL, MySQL, or H2 database options
  • All five channel connectors with per-user quotas
  • Basic audit log and message history (90 days)
  • Community forum support
Enterprise

PaaS / Enterprise

Self-managed enterprise edition for organizations that need high availability, strict compliance, SSO, and enterprise-grade support. Deploy on-premise or in your own cloud account.

Request a quote → Enterprise docs
  • Unlimited users and messages; active-active HA clusters
  • SAML/OIDC SSO, SCIM provisioning, role & attribute-based access
  • Full audit log (7+ years), WORM-compliant archive option
  • Air-gapped deployment support for regulated industries
  • Dedicated technical account manager and 24×7 support SLA
  • Custom connector SDK and professional services available
Cloud

SaaS / Cloud

Fully managed, multi-tenant cloud edition. Zero infrastructure to operate — just sign up, connect your channels, and start sending. Global point-of-presence delivery with auto-scaling throughput.

Start free trial → Cloud docs
  • Zero-ops, multi-tenant SaaS with auto-scaling delivery
  • Global edge network for low-latency message routing
  • 99.95% uptime SLA on Business and Enterprise tiers
  • Per-message pricing with volume discounts
  • Built-in compliance: SOC 2 Type II, GDPR, HIPAA-ready
  • 24×7 cloud operations team and status page
Compare editions

Feature-by-feature

Capability OSS Individual OSS Small Firm Enterprise Cloud
License Apache 2.0 Apache 2.0 Commercial Subscription
Users 1 Up to 25 Unlimited Unlimited
All 5 channels ✓✓✓✓
Visual flow builder ✓✓✓✓
High availability (HA) ——✓✓
SSO (SAML / OIDC) ——✓✓
Audit log retention 7 days 90 days 7 years 7 years
Air-gapped deploy ——✓—
Multi-region delivery ——ManualBuilt-in
Uptime SLA ——99.9%99.95%
Support Community Community 24×7, TAM 24×7, chat
Price Free Free Custom Per-message

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