# Invoice Ninja vs Kill Bill

**Leader by vioscaleAI score:** Invoice Ninja

| Attribute | Invoice Ninja | Kill Bill |
|---|---|---|
| **vioscaleAI score** | 60.6 (75% (high)) | 42.5 (77% (high)) |
| activity.commits_last_30d | 100 | 27 |
| adoption.dependent_repos | 0 | 15 |
| adoption.github_stars | 10,268 | 5,793 |
| content.faq | `[{"answer":"A comprehensive solution combining invoicing, payment processing, expense tracking, time management, and project coordination in a single platform, available in both cloud and self-hosted deployments. It is indexed under Billing & Invoicing Software.","source":"https://invoiceninja.com/3-unconventional-freelance-pricing-models-that-clients-love/","question":"What is Invoice Ninja?","confidence":0.6},{"answer":"Invoice Ninja offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://invoiceninja.com/3-unconventional-freelance-pricing-models-that-clients-love/","question":"Is Invoice Ninja free?","confidence":0.6},{"answer":"Invoice Ninja supports the web, Windows, macOS, Linux, iOS and Android. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://invoiceninja.com/3-unconventional-freelance-pricing-models-that-clients-love/","question":"What platforms does Invoice Ninja support?","confidence":0.6},{"answer":"Yes. Invoice Ninja can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://invoiceninja.com/3-unconventional-freelance-pricing-models-that-clients-love/","question":"Can Invoice Ninja be self-hosted?","confidence":0.6},{"answer":"We have confirmed 15 integrations for Invoice Ninja, including Stripe, PayPal, Square, GoCardless, Gmail, QuickBooks, Slack and MailChimp, plus 7 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://invoiceninja.com/3-unconventional-freelance-pricing-models-that-clients-love/","question":"What does Invoice Ninja integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 and GDPR for Invoice Ninja. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Invoice Ninja not holding them. Always confirm compliance directly before you rely on it.","source":"https://invoiceninja.com","question":"What security certifications does Invoice Ninja have?","confidence":0.48}]` | `[{"answer":"Kill Bill is an open-source billing and payments platform that handles complex subscription, usage-based, and prepaid billing models with multi-currency invoicing, tax compliance, and payment gateway abstraction. Deploy self-hosted or use fully managed hosting with optional enterprise accelerator capabilities. It is indexed under Billing & Invoicing Software.","source":"https://killbill.io/pricing.html","question":"What is Kill Bill?","confidence":0.6},{"answer":"Kill Bill is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. A commercial or hosted edition starts at $40 per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://killbill.io/pricing.html","question":"Is Kill Bill free to use?","confidence":0.6},{"answer":"Kill Bill supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://killbill.io/pricing.html","question":"What platforms does Kill Bill support?","confidence":0.6},{"answer":"Yes. Kill Bill can be deployed cloud / SaaS, hybrid, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://killbill.io/pricing.html","question":"Can Kill Bill be self-hosted?","confidence":0.6},{"answer":"We have confirmed 9 integrations for Kill Bill, including Stripe, Adyen, Braintree, PayPal, GoCardless, Avalara, Vertex and LDAP, plus 1 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://killbill.io/pricing.html","question":"What does Kill Bill integrate with?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Kill Bill. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Kill Bill not holding them. Always confirm compliance directly before you rely on it.","source":"https://killbill.io/platform/tax-compliance.html","question":"What security certifications does Kill Bill have?","confidence":0.7},{"answer":"Yes. Kill Bill is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/killbill/killbill","question":"Is Kill Bill open source?","confidence":0.95},{"answer":"Kill Bill is available worldwide. Its primary market is the United States.","source":"https://killbill.io/pricing.html","question":"Where is Kill Bill available?","confidence":0.75}]` |
| deployment.options | `{"cloud":true,"hybrid":true,"self_hosted":true}` | `{"cloud":true,"hybrid":true,"on_prem":true,"self_hosted":true}` |
| description.long | Provides invoicing, payment collection, expense tracking, and time tracking capabilities integrated into a single application. Available as a cloud-hosted service or self-hosted installation with full control over infrastructure. | Open-source subscription and usage billing system that runs on your infrastructure, supporting recurring charges, tiered pricing, and usage-based models with detailed invoicing and audit trails. |
| features.capabilities | `{"dunning":"basic_retry","gl_sync":true,"analytics":true,"api_first":true,"invoicing":true,"tax_handling":"integration","self_hostable":true,"pricing_models":"Subscription, time-based, project-based invoicing","usage_metering":"basic","catalog_management":true,"subscription_billing":true}` | `{"dunning":"basic_retry","gl_sync":false,"analytics":true,"api_first":true,"invoicing":true,"tax_handling":"native","self_hostable":true,"pricing_models":"Subscriptions, usage-based, prepaid, postpaid, hybrid, and complex multi-currenc","usage_metering":"real_time","catalog_management":true,"merchant_of_record":false,"revenue_recognition":"native_asc606","subscription_billing":true}` |
| integrations.count | 1,000 | 10 |
| integrations.list | `[{"name":"Stripe"},{"name":"PayPal"},{"name":"Square"},{"name":"GoCardless"},{"name":"Gmail"},{"name":"QuickBooks"},{"name":"Slack"},{"name":"MailChimp"},{"name":"Zapier"},{"name":"Make"},{"name":"Pabbly"},{"name":"Checkout.com"},{"name":"Helcim"},{"name":"PayFast"},{"name":"Nordigen"}]` | `[{"name":"Stripe"},{"name":"Adyen"},{"name":"Braintree"},{"name":"PayPal"},{"name":"GoCardless"},{"name":"Avalara"},{"name":"Vertex"},{"name":"LDAP"},{"name":"Active Directory"},{"name":"Email Notifications","native":true},{"name":"Tax Calculation","native":true,"category":"tax"},{"name":"Analytics","native":true,"category":"analytics"},{"name":"Salesforce","native":false,"category":"crm","direction":"outbound"},{"name":"HubSpot","native":false,"category":"crm","direction":"outbound"},{"name":"NetSuite","native":false,"category":"erp","direction":"outbound"},{"name":"SAP","native":false,"category":"erp","direction":"outbound"},{"name":"QuickBooks","native":false,"category":"erp","direction":"outbound"},{"name":"Hyperswitch","native":true,"category":"payments"},{"name":"Avalara AvaTax","native":true,"category":"tax"},{"name":"Kintsugi","native":true,"category":"tax"}]` |
| language.primary | PHP | Java |
| license.spdx | - | Apache-2.0 |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"mac":true,"web":true,"linux":true,"android":true,"windows":true}` | `{"web":true}` |
| pricing | `{"type":"subscription","plans":[{"free":true,"name":"Free","summary":"Free forever","features":["5 clients","Unlimited invoicing","4 invoice templates","Payment processing (Stripe, PayPal, Square, GoCardless)","Recurring invoices and auto-billing","Expense management","Vendor tracking","Purchase orders","Bank transaction import","Client portal","Quote management","E-signature support","Zapier integrations","Multi-factor authentication","PCI-DSS compliance","Encrypted data","24/7 cybersecurity monitoring"],"contactSales":false,"includedLimits":{"clients":"5","invoices":"unlimited"}},{"free":false,"name":"Pro","features":["11 invoice templates","All Free plan features"],"commitment":"annual","contactSales":false},{"free":false,"name":"Enterprise","summary":"Custom pricing for 1-100 users","features":["11 invoice templates","Custom features and configuration"],"minSeats":1,"commitment":"annual","description":"Pricing based on number of users (1-100)","contactSales":true}],"addOns":[{"name":"Product & Inventory Management","components":[{"kind":"fixed","amount":140,"period":"year","currency":"USD"}]},{"name":"API Integration with 3rd Party Apps","components":[{"kind":"fixed","amount":180,"period":"year","currency":"USD"}]},{"name":"Branded Client Portal: Billing.YourCompany.com"}],"summary":"Free forever. Pro pricing not shown. Enterprise pricing varies by users (1-100).","currency":"USD","freeTier":true,"sourceUrl":"https://invoiceninja.com/5-pricing-strategies-freelancers-looking-earn-money/","retrievedAt":"2026-09-10T21:03:24.100Z","billingPeriods":["year"]}` | `{"type":"hybrid","plans":[{"free":true,"name":"Kill Bill (Open Source)","summary":"Free, open source under Apache 2.0","features":["Subscription and usage billing","Catalog and invoicing","Multi-tenancy","Plugin framework","REST API","Community support","Self-hosted deployment"],"description":"Free, open-source billing platform with community support","contactSales":false},{"free":false,"name":"Aviate","summary":"$9,999/month billed annually, never tied to revenue","features":["Catalog UI and plan APIs","Coupons","Cloud hosting with auto-scaling","Aviate Metering for usage events","Aviate Wallet for prepaid credits","Aviate Tax","Level 3 support (first response within 1 business day for P1)","Monitoring and health checks","Plugin marketplace"],"commitment":"annual","components":[{"kind":"fixed","amount":9999,"period":"month","currency":"USD"}],"description":"Cloud-hosted enterprise offering with support and additional features","contactSales":false}],"summary":"Free open source or $9,999/month Aviate enterprise","currency":"USD","freeTier":true,"sourceUrl":"https://killbill.io/platform/catalog-pricing.html","retrievedAt":"2026-10-13T15:14:03.999Z","startingPrice":{"amount":9999,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | freemium |
| pricing.price_level | low | high |
| pricing.starting_price | - | `{"amount":9999,"currency":"USD"}` |
| pricing.transparent | no | yes |
| release.cadence_days | 1 | 47 |
| release.history | `[{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.47","date":"2026-10-10T07:16:41Z","type":"stable","version":"v5.13.47"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.46","date":"2026-10-10T06:33:23Z","type":"stable","version":"v5.13.46"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.45","date":"2026-10-08T23:45:14Z","type":"stable","version":"v5.13.45"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.44","date":"2026-10-07T00:37:11Z","type":"stable","version":"v5.13.44"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.43","date":"2026-09-18T00:10:15Z","type":"stable","version":"v5.13.43"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.42","date":"2026-09-17T21:10:26Z","type":"stable","version":"v5.13.42"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.41","date":"2026-09-17T06:57:24Z","type":"stable","version":"v5.13.41"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.40","date":"2026-09-12T23:09:54Z","type":"stable","version":"v5.13.40"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.39","date":"2026-09-12T23:00:29Z","type":"stable","version":"v5.13.39"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.38","date":"2026-09-12T01:15:40Z","type":"stable","version":"v5.13.38"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.37","date":"2026-09-02T03:58:43Z","type":"stable","version":"v5.13.37"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.36","date":"2026-08-27T21:54:07Z","type":"stable","version":"v5.13.36"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.35","date":"2026-08-25T02:45:17Z","type":"stable","version":"v5.13.35"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.34","date":"2026-08-25T02:29:30Z","type":"stable","version":"v5.13.34"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.33","date":"2026-08-17T10:48:50Z","type":"stable","version":"v5.13.33"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.32","date":"2026-08-15T06:51:18Z","type":"stable","version":"v5.13.32"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.31","date":"2026-08-12T07:02:54Z","type":"stable","version":"v5.13.31"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.30","date":"2026-08-06T00:34:18Z","type":"stable","version":"v5.13.30"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.29","date":"2026-08-05T02:30:48Z","type":"stable","version":"v5.13.29"},{"url":"https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.28","date":"2026-08-05T02:19:36Z","type":"stable","version":"v5.13.28"}]` | `[{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.22","date":"2026-09-29T04:01:36Z","type":"stable","version":"killbill-0.24.22"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.21","date":"2026-08-12T06:47:08Z","type":"stable","version":"killbill-0.24.21"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.20","date":"2026-08-07T06:01:08Z","type":"stable","version":"killbill-0.24.20"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.19","date":"2026-07-09T05:52:01Z","type":"stable","version":"killbill-0.24.19"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.18","date":"2026-05-14T06:25:50Z","type":"stable","version":"killbill-0.24.18"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.17","date":"2026-04-23T08:34:31Z","type":"stable","version":"killbill-0.24.17"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.16","date":"2025-11-25T10:52:32Z","type":"stable","version":"killbill-0.24.16"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.15","date":"2025-07-21T06:08:44Z","type":"stable","version":"killbill-0.24.15"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.13","date":"2025-02-07T13:03:42Z","type":"stable","version":"killbill-0.24.13"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.12","date":"2024-10-29T12:47:14Z","type":"stable","version":"killbill-0.24.12"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.11","date":"2024-09-09T13:01:01Z","type":"stable","version":"killbill-0.24.11"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.10","date":"2024-03-18T14:54:37Z","type":"stable","version":"killbill-0.24.10"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.9","date":"2024-02-29T09:03:30Z","type":"stable","version":"killbill-0.24.9"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.7","date":"2024-02-06T08:26:00Z","type":"stable","version":"killbill-0.24.7"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.6","date":"2024-02-01T03:26:56Z","type":"stable","version":"killbill-0.24.6"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.5","date":"2023-08-25T11:36:49Z","type":"stable","version":"killbill-0.24.5"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.4","date":"2023-07-20T06:09:10Z","type":"stable","version":"killbill-0.24.4"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.3","date":"2023-06-27T07:33:33Z","type":"stable","version":"killbill-0.24.3"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.24.2","date":"2023-05-02T10:51:38Z","type":"stable","version":"killbill-0.24.2"},{"url":"https://github.com/killbill/killbill/releases/tag/killbill-0.22.33","date":"2023-04-19T22:10:47Z","type":"stable","version":"killbill-0.22.33"}]` |
| reliability.sla_pct | - | 48 |
| reliability.status_page | yes | - |
| security.gdpr | yes | yes |
| security.pci | yes | yes |
| security.scorecard | 4 | 4.4 |
| security.soc2 | yes | - |
| security.trust_center | - | https://killbill.io/platform/tax-compliance.html |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=packagist&package_name=hillelcoren%2Finvoice-ninja&per_page=100","last_12m":0,"max_severity":"MODERATE"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.kill-bill.billing%3Akillbill-util&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Billing & Invoicing Software)

| Capability | Invoice Ninja | Kill Bill |
|---|:--:|:--:|
| **Core** |  |  |
| Subscription billing | ✓ | ✓ |
| Usage metering | Basic | Real-time |
| Pricing models | Subscription, time-based, project-based invoicing | Subscriptions, usage-based, prepaid, postpaid, hybrid, and complex multi-currenc |
| Invoicing & AR | ✓ | ✓ |
| Catalog management | ✓ | ✓ |
| **Commerce** |  |  |
| Merchant of record | - | ✗ |
| **Finance** |  |  |
| Revenue recognition | - | Native ASC 606 |
| Tax handling | Integration | Native |
| **Collections** |  |  |
| Dunning | Basic retry | Basic retry |
| **Integrations** |  |  |
| GL / ERP sync | ✓ | ✗ |
| **Ecosystem** |  |  |
| API-first / developer-first | ✓ | ✓ |
| **Deployment** |  |  |
| Self-hostable | ✓ | ✓ |
| **Insight** |  |  |
| Revenue analytics | ✓ | ✓ |

*Source: vioscaleAI. Generated 2026-10-16T20:12:59.241Z. "-" = undocumented, not absent.*