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Kill Bill

FINANCE
Velocity5.0

Open-source subscription billing and payments platform.

killbill.io ↗

Kill Bill keeps its billing engine on a slow, reliability-first maintenance cadence.

billingsubscriptionsopen sourcereliabilitymaintenanceinvoicing
◆Current state
Kill Bill, the open-source subscription-billing platform, is in steady maintenance mode. The active 0.24.x line is a stream of bug fixes, dependency updates, and invoice-processing reliability work, while a 0.25.x branch has opened with point releases that so far ship as bare release-plugin tags without published notes. Nothing here changes the capability surface; the focus is correctness and operational robustness of billing runs.
◆Where it's heading
The project is hardening the parts operators feel most: invoice failure handling, lock and retry behavior, and logging around aborted runs. The parallel 0.25.x line suggests the next feature-bearing release is being staged, but the visible changes remain incremental. Expect continued small releases stabilizing invoicing before 0.25.x carries anything user-facing.
◆Prediction
Likely more 0.24.x/0.25.x point releases in the same vein — dependency bumps and invoice-reliability fixes — with 0.25.0's substantive changes only becoming clear once release notes accompany the tags.

◆Recent moves

  1. 2d ago

    Kill Bill 0.25.1 point release (no notes)

    A 0.25.1 point release published as a bare maven-release tag with no accompanying notes. Part of the newly opened 0.25.x line but with no visible user-facing change to assess.

    View source ↗
  2. 15d ago

    Kill Bill 0.24.19: Shiro 1.13 bump, JODA to Java DateTime

    Updates Shiro to 1.13.0 and replaces JODA with Java DateTime in the Java client. Internal dependency and library maintenance with no user-visible feature change.

    View source ↗
  3. 1mo ago

    Kill Bill 0.25.0 release (no notes)

    Opens the 0.25.x branch but ships as a bare release-plugin tag copy with no published notes, so the substantive changes are not yet legible from the changelog.

    View source ↗
  4. 2mo ago

    Kill Bill 0.24.18: invoice failure handling — retries, parking, logging

    Reworks invoice failure handling with retries, account parking on unrecoverable errors, and uniform WARN logging across failure paths. Concrete operational reliability work on the part of the system operators watch most closely.

    View source ↗
  5. 3mo ago

    Kill Bill 0.24.17: bug fixes + requestedDate on CreditResource

    Mostly bug fixes (account BCD state, migration timestamps, error-message typo) alongside a new requestedDate query parameter on CreditResource. Minor but a real API addition on top of correctness fixes.

    View source ↗
  6. 8mo ago

    Kill Bill 0.24.16: subscription, catalog, and pagination bug fixes

    Bug fixes around subscription expiry, catalog NPEs, price-override subscription creation, and pagination headers. Correctness maintenance with no capability change.

    View source ↗