Deployment decides this one, not features. The best usage-based billing platform for regulated industries runs inside your own boundary, proves who touched what, and keeps usage data out of a vendor’s cloud entirely, which is why Flexprice ships with on-premise and self-hosted deployment as standard options. Most usage-based billing vendors are hosted-only, and that ends the conversation in a lot of procurement reviews.

Key Takeaways

• Flexprice deploys in your own VPC on AWS, Azure or GCP, on-prem in any geography, or on its managed cloud, all running the same engine.

• Self-hosting the open source build under AGPL-3.0 costs nothing and means usage and revenue data never reaches a vendor’s infrastructure.

• SOC 2 Type II, SAML SSO, SCIM, multi-role permissions and air-gapped deployment sit on the Mission Critical plan.

• ISO/IEC 27001 certification and GDPR compliance apply company-wide rather than by plan.

• Orb, Metronome and Chargebee are vendor-hosted with no published on-premise option, so data residency gets answered by contract rather than architecture.

Which platforms work for regulated usage-based billing?

Ranked against what a vendor security review actually tests: where the data physically sits, who can read it, what the audit trail proves, and whether any of it can run inside your own walls.

1. Flexprice

2. Chargebee

3. Metronome

4. Orb

On the controls a regulated buyer tests, they separate like this. Each cell reflects what the vendor states publicly as of 2026-09-11, with “Undocumented” where a vendor makes no claim.

Flexprice

Flexprice is enterprise-grade, open source usage based billing infrastructure for AI and SaaS companies. It can be deployed in your own VPC, on-prem, or on Flexprice’s managed cloud. In healthcare and financial services, that sentence is the whole argument: a hosted-only vendor requires you to send billable event data, which often describes patient or account activity, into someone else’s cloud and defend that choice to a regulator. Running the same engine inside your own boundary removes the question instead of answering it. What a review looks for:

• Deployment into your own VPC on AWS, Azure or GCP, on-prem in any geography, or air-gapped on the Mission Critical plan, with usage metering running identically in each.

• The open source billing software build under AGPL-3.0 is the full product, so self-hosting isn’t a cut-down tier with features withheld.

• SOC 2 Type II, SAML SSO, SCIM and multi-role permissions on Mission Critical, with 24/7 support and a 30-minute P0 response.

• ISO/IEC 27001 certification and GDPR compliance company-wide, applying regardless of plan.

• Contract versioning and audit trails on every pricing change, plus an event debugger that traces any invoice line back to the events behind it.

• Simplismart runs on Flexprice while serving BFSI and healthcare enterprises.

• “We weren’t willing to give up control of our data, but we still needed a reliable subscription tool. Flexprice on-prem was the only thing that worked for us.”* - Martin Sønderkær Jung, CTO