ABAXUS vs Orb — Self-Hosted vs SaaS Usage-Based Billing

What Is Each Product

Orb is a SaaS usage-based billing platform focused on flexible pricing models — particularly complex pricing structures like matrix pricing, custom formulas, credits, and commitments. It has strong pricing configurability and is often chosen by companies that have exhausted Stripe Billing’s pricing model support.

ABAXUS is a self-hosted billing engine that deploys inside your own infrastructure. It handles idempotent event ingestion, metered aggregation, versioned pricing, entitlements, and automated invoicing — all within your cluster.

Both products solve the same core problem: billing for B2B SaaS companies with usage-based pricing models that exceed what basic subscription billing platforms handle. The differentiation is deployment model and the architectural implications that follow.

Shared Strengths

Both ABAXUS and Orb address gaps that simpler platforms leave:

Complex pricing models — tiered, volume, matrix, package, flat + usage hybrid, custom formula
Usage event metering — receive usage events, aggregate by metric, apply pricing
Idempotent event handling — safe to retry without double-counting
Credits and commitments — prepaid credit systems, minimum commitments
Customer-facing usage visibility — real-time usage against billing period

Where the Deployment Model Matters

Data residency and compliance

Orb is a SaaS platform. Usage events containing customer identifiers, resource consumption data, or behavioral patterns are transmitted to and stored in Orb’s infrastructure. For companies with compliance requirements, this creates a third-party data processor in their billing path:

HIPAA: PHI embedded in usage records (per-patient, per-scan billing) requires Orb BAA
GDPR: Usage data classified as personal data requires GDPR safeguards for EU-to-US transfer
SOC 2: Orb’s security posture is now part of your compliance audit scope

ABAXUS keeps all usage data in your own environment. The compliance boundary is entirely within your cloud account. No BAA, no DPA, no third-party security review for the billing layer.

Audit trail depth

Orb provides invoice line items and usage record history. ABAXUS goes one level deeper: every invoice line item is linked to the specific raw events that generated it through SHA-256 checksums. A customer can independently verify their invoice against their own application logs without requiring a vendor ticket or data export.

This distinction matters for:

Regulated industries with specific audit trail retention requirements (HIPAA: 6-7 years, SaMD: 10+ years)
Enterprise customers who require verifiable usage data in support of invoice disputes
Internal finance teams who need to reconcile billing records against source-of-truth usage data

Cost structure at scale

Orb’s pricing is not public — it is negotiated based on billing volume, feature requirements, and contract terms. Like all SaaS billing platforms, it combines base fees with components that scale with your billing volume.

ABAXUS is a fixed annual license ($12K/yr Starter, $36K/yr Growth). No component tied to your ARR or event volume. The infrastructure cost ($300–$2,000/month) is yours — but it grows slowly relative to revenue. The ABAXUS Savings Calculator models the crossover point for your specific numbers.

Throughput and the network boundary

At high event volumes, the network call to a SaaS billing API on every usage event introduces latency and requires client-side batching and retry logic. For some workloads (high-frequency API calls, real-time AI token counting, streaming compute) this is a significant architectural concern.

ABAXUS receives events locally within your cluster. The ingestion endpoint is a local network call, not a cross-datacenter API request. Throughput is your cluster’s capacity.

Technical Capabilities Comparison

Capability	ABAXUS	Orb
Deployment	Self-hosted (your infra)	SaaS (Orb’s cloud)
Event ingestion	Idempotent, 202 Accepted	Idempotent
Meter versioning	Time-bounded definitions	Plan versioning
Pricing models	per_unit · tiered · volume · package · flat_fee · matrix · custom_formula	per_unit · tiered · volume · BPS · matrix · custom
Credits	Ledger-based burn-down	Supported
Entitlements	Boolean · limit · custom types	Feature flags
Audit trail	SHA-256 per invoice line → raw events	Invoice line items
Data residency	100% in your environment	Orb’s infrastructure
HIPAA support	Native (no BAA needed)	BAA required
Decimal arithmetic	DECIMAL(20,10)	Platform managed
Air-gapped deployment	Supported	Not supported

Pricing Models Supported

Both products support the core usage-based pricing primitives:

Model	ABAXUS	Orb
Per unit (linear)	✓	✓
Tiered (graduated)	✓	✓
Volume (all units at tier)	✓	✓
Package	✓	✓
Flat fee	✓	✓
Matrix (dimensions × rate)	✓	✓
Custom formula	✓	✓
Credits / prepaid	✓	✓
Commitments / minimums	✓	✓
BPS (basis points)	✓	✓

When to Choose Each

Choose Orb when:

Engineering team is small and operational overhead of self-hosted infrastructure is too high
No compliance data residency requirement for usage events
Managed operations are preferable — you want billing to be someone else’s problem
You need Orb’s specific integrations or payment gateway connections

Choose ABAXUS when:

Compliance requires usage data to stay in your own environment (HIPAA, GDPR data residency)
Transaction fee component of SaaS billing is growing materially with ARR
Event throughput requirements are approaching or exceeding SaaS API limits
Deep audit trail (event-level traceability per invoice line) is required
You have the engineering capacity to operate billing infrastructure as owned infrastructure