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killbill

22 indexed repositories · View on GitHub

killbill
Open-Source Subscription Billing & Payments Platform

Java · 5751 stars
killbill-commons
Kill Bill reusable Java components

Java · 145 stars
killbill-admin-ui
Kill Bill Administrative UI engine

HTML · 68 stars
killbill-cloud
Kill Bill deployment utilities

Ruby · 68 stars
killbill-docs
Kill Bill documentation

CSS · 43 stars
killbill-client-java
Java client library for Kill Bill

Java · 35 stars
killbill-platform
Kill Bill core platform

Java · 30 stars
killbill-stripe-plugin
Kill Bill plugin for Stripe

Java · 26 stars
killbill-admin-ui-standalone
Kill Bill Administrative UI

Ruby · 22 stars
killbill-api
Kill Bill APIs

Java · 20 stars
killbill-email-notifications-plugin
Kill Bill plugin for email notifications

Java · 12 stars
killbill-plugin-framework-java
Framework to write Kill Bill plugins

Java · 11 stars
killbill-avatax-plugin
Kill Bill plugin for Avalara AvaTax

Java · 6 stars
killbill-oss-parent
Kill Bill parent pom.xml

Shell · 5 stars
killbill-payment-test-plugin
Test Payment plugin

Java · 4 stars
killbill-analytics-ui
Kill Bill UI for the Analytics plugin

HTML · 4 stars
killbill-vertex-plugin
Kill Bill tax plugin for Vertex

Java · 1 star
slate
Kill Bill API documentation

JavaScript · 1 star
killbill-swagger-coden
Client code generation

Mustache · 0 stars
killbill-deposit-ui
Kill Bill UI for the deposit plugin

Ruby · 0 stars
2 more repositories live on View on GitHub

Beginner friendly Everything

Open All

Plugin ordering: no deterministic ordering mechanism for entitlement, catalog and usage plugin APIs Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

killbill/killbill#2310 · Opened Aug 27, 2026
Repeated blockBilling on a multi-month billing period produces overlapping RECURRING terms → ILLEGAL INVOICING STATE, account parked Open

OVERDUE

killbill/killbill#2306 · 1 assignee · Opened Aug 21, 2026
Add Support For Partial locale in invoice/catalog translations Open

INVOICE

killbill/killbill#2304 · 1 assignee · Opened Aug 20, 2026
The delete button should be disabled for Aviate catalogs Open

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

killbill/killbill-admin-ui#656 · Opened Aug 19, 2026
Update Design System and standardise Color, Typography etc. Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

killbill/killbill-admin-ui#654 · Opened Aug 11, 2026
Overdue: reevaluation schedule is not re-anchored when the earliest unpaid invoice date changes, causing a configured state to be skipped Open

killbill/killbill#2297 · 1 assignee · Opened Aug 9, 2026
Backend work to support shared tenant branding (logo, company info, brand colors) Open

Difficulty 4/5 3-5 days Newbie friendliness 50/100

killbill/killbill-email-notifications-plugin#86 · 1 comment · Opened Aug 7, 2026
Catalog changes for existing subscriptions are silently dropped when org.killbill.subscription.align.effectiveDateForExistingSubscriptions=true Open

killbill/killbill#2291 · 1 assignee · Opened Jul 31, 2026
Refactor `HtmlInvoiceGenerator` to support shared tenant branding (logo, company info, brand colors) Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

killbill/killbill#2283 · Opened Jul 27, 2026
Configure global lock retries and queue reschedule intervals for robust concurrency handling Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

killbill/killbill#2280 · Opened Jul 23, 2026
Large invoice creation fails because billing_events exceeds BLOB limit Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

killbill/killbill#2278 · 2 reactions · Opened Jul 20, 2026
Ability to include new add-ons on older version base plans Open

CATALOG

Difficulty 4/5 3-5 days Newbie friendliness 45/100

killbill/killbill#2261 · 1 reaction · Opened Jun 17, 2026
Enhance catalog plugin API to fetch shallow catalog Open

api CATALOG performance

Difficulty 4/5 3-5 days Newbie friendliness 52/100

killbill/killbill#2258 · Opened Jun 16, 2026
Enhance usage plugin Api to pass all transitions Open

api enhancement USAGE

Difficulty 4/5 3-5 days Newbie friendliness 48/100

killbill/killbill#2257 · Opened Jun 16, 2026
[Security] Support for OIDC compliant vendor Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

killbill/killbill#2256 · 4 comments · Opened Jun 15, 2026
[Security] AdminResource endpoints lack permission checks, allowing any authenticated user to disrupt server health and read internal queue data Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

killbill/killbill#2251 · 2 comments · Opened Jun 3, 2026
Add API to List All Available Role Definitions Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

killbill/killbill#2250 · 1 comment · Opened Jun 1, 2026
Dry-run invoice does not show exact invoice Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

killbill/killbill#2249 · Opened May 29, 2026
Security concern: api_secret and api_salt stored in tenants table Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

killbill/killbill#2248 · Opened May 29, 2026
java2x - revert integration branch ref back to `master` branch Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

killbill/killbill-stripe-plugin#145 · Opened May 22, 2026
java2x - revert docker-compose image once killbill 0.26.x + docker released Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

killbill/killbill-stripe-plugin#144 · Opened May 22, 2026
java2x - revert docker-compose image once killbill 0.26.x + docker released Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

killbill/killbill-avatax-plugin#39 · Opened May 21, 2026
java2x - revert docker-compose image once killbill 0.26.x + docker released Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

killbill/killbill-email-notifications-plugin#74 · Opened May 20, 2026
Limitations with process notifications and non signed webhooks Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

killbill/killbill#2227 · Opened May 19, 2026
Insufficient context to implement Stripe gateway webhook with processNotification Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

killbill/killbill-stripe-plugin#143 · Opened May 19, 2026
BCD_UPDATE event does not seem to be returned from subscription events Open

ENTITLEMENT SUBSCRIPTION_BASE

Difficulty 4/5 3-5 days Newbie friendliness 45/100

killbill/killbill#2224 · Opened May 14, 2026
java2x - once killbill 0.26.x + docker released revert docker-compose image Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

killbill/killbill-payment-test-plugin#31 · Opened May 13, 2026
[Invoice] Tighten lock-failure retry handling for consistency across all paths Open

enhancement INVOICE

killbill/killbill#2207 · 1 reaction · 2 assignees · Opened Apr 27, 2026
Incorrect invoice items date for CBA_ADJ item Open

INVOICE

Difficulty 3/5 1-2 days Newbie friendliness 45/100

killbill/killbill#2202 · 1 comment · Opened Apr 20, 2026
handle undeclared mustache variables in upload templates Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

killbill/killbill-email-notifications-plugin#67 · Opened Apr 9, 2026
handle undeclared mustache variables in upload templates Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

killbill/killbill#2197 · Opened Apr 9, 2026
TenantApi: add support to disable old key when `insertUserKeyValue()` Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

killbill/killbill#2196 · 1 comment · Opened Apr 7, 2026
calling uninstall plugin endpoint without specifying a version leads to runtime error Open

bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

killbill/killbill-platform#193 · Opened Mar 30, 2026
Payment refund with invoice item adjustment does not save invoice item description Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

killbill/killbill#2191 · 1 comment · 1 reaction · Opened Mar 24, 2026
Inconsistency in createSubscriptionWithAddOns: billingDate vs billingStartDate Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

killbill/killbill#2189 · 1 comment · Opened Mar 10, 2026
Description not translated Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

killbill/killbill-email-notifications-plugin#66 · Opened Feb 27, 2026
Migrate away from Joda-Time to java.time Open

enhancement

killbill/killbill-client-java#144 · 1 comment · 1 assignee · Opened Feb 7, 2026
Add MCP Server for Slate Documentation Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

killbill/slate#355 · 3 comments · Opened Feb 6, 2026
Invoice not generated when account does not have zip code and avatax plugin is configured Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

killbill/killbill-avatax-plugin#36 · Opened Feb 3, 2026
Error during subscription creation/retrieval for certain catalogs Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

killbill/killbill#2177 · 1 comment · Opened Dec 18, 2025
Upgrade to java 17 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

killbill/killbill#2176 · 1 comment · Opened Dec 5, 2025
Kaui 4.0.1 - viewing catalog Open

enhancement

killbill/killbill-admin-ui#556 · 5 comments · 1 assignee · Opened Nov 14, 2025
Kaui 4.0.1 Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

killbill/killbill-avatax-plugin#35 · Opened Nov 13, 2025
Issue with subscription creation with usage price override Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

killbill/killbill#2167 · Opened Oct 13, 2025
Invalid Plan name added to Catalog under PriceLists section Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

killbill/killbill#2166 · 2 comments · Opened Oct 8, 2025
Subscription events past expiration dates cause NPE Open

bug SUBSCRIPTION_BASE

Difficulty 4/5 3-5 days Newbie friendliness 35/100

killbill/killbill#2163 · 2 comments · Opened Oct 2, 2025
Cannot list plugins Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

killbill/killbill#2162 · Opened Sep 30, 2025
Adopt Postgresql as the default database implementation Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

killbill/killbill#2157 · 1 comment · Opened Sep 18, 2025
Adopt UUIDv7 for all identifiers Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

killbill/killbill#2156 · 2 comments · Opened Sep 18, 2025
Creating/cancelling subscription for a currency missing in Catalog Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

killbill/killbill#2155 · Opened Sep 18, 2025

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