Kill Bill vs UniBee
Kill Bill
killbill.ioUniBee
unibee.devSide by side
| Figure | Kill Bill | UniBee |
|---|---|---|
| Price from | $9,999/mo | $99/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | Yes | Yes |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 5 | 5 |
| Spec score · Subscription Billing Software | 9.1 (#3) | 8.5 (#19) |
| Spec score · Subscription Management Software | 9.2 (#2) | 8.5 (#7) |
| Spec score · Dunning Management Software | 9.1 (#4) | 8.5 (#14) |
| Deployment | The maker provides Docker and Tomcat installation options and says Kill Bill can run on Windows, Mac, or Linux computers, or on a Linux cloud server. | Customers can use a fully managed cloud deployment or self-host the open-source billing engine; the Advanced plan also offers on-prem deployment. |
| Integrations | The maker lists Stripe, Adyen, PayPal, Braintree, GoCardless, Coinbase, Avalara, and Vertex among its integrations. | The site lists more than 25 integrations, including Mixpanel, MailChimp, HubSpot, Twilio, Xero, Stripe, QuickBooks, PayPal and Zapier. |
| Intended users | The maker describes Kill Bill as serving online businesses, teams needing customization, startups, and growth-stage companies. | The subscription management page describes UniBee as built for international subscription businesses and names mid-market SaaS and AI companies through established enterprises as users. |
| Invoicing | Invoices are generated as billing events occur or on billing dates and support credits, adjustments, drafts and dry runs. | The system generates invoices automatically, supports custom templates and taxes, and can email or produce PDF invoices. |
| License | The core Kill Bill project is released under the Apache 2.0 license. | The standalone UniBee deployment, API and portals are licensed under GNU AGPLv3. |
| Payments | A common payment API routes transactions through gateway plugins and supports refunds and chargebacks. | UniBee says it supports multiple payment gateways, including Stripe and PayPal, with payment routing and fallback options. |
| Product | Kill Bill is an open-source, programmable billing platform with APIs for pricing models, subscriptions, invoices, and payment gateway integrations. | UniBee is an open-source, gateway-agnostic subscription billing platform with a free self-hosted edition and a managed cloud option. |
| Public API | Kill Bill exposes REST and JSON over HTTP under /1.0/kb/ for tenants, catalogs, accounts, subscriptions, usage, invoices, payments, tags, custom fields and audit logs. | The API uses authenticated REST endpoints with Bearer API keys and separate production and sandbox hosts. |
| Rating on Capterra | 4.7 out of 5 from 17 reviews | 5.0 out of 5 from 3 reviews |
| Rating on G2 | 4.5 out of 5 from 2 reviews | 5 out of 5 from 6 reviews |
| Rating on GetApp | 4.7 out of 5 from 17 reviews | 5.0 out of 5 from 3 reviews |
| SDKs | Client libraries are provided for Java, Ruby, Python, Go, PHP and JavaScript; additional community libraries include .NET. | Official public clients are available for Node.js/TypeScript, Go, Java, PHP, Python and Ruby. |
| Subscription management | The platform can create, change, pause, resume and cancel subscriptions with configurable policies and proration. | The platform supports plan changes, subscription pauses, upgrades, downgrades, trials, add-ons, and lifecycle automation. |
| Support | The self-hosted open-source option includes community support, while paid support tiers are separately purchased for customer-managed deployments. | The Starter plan includes community-level support, Business includes dedicated technical support, and Open-source support is via the community only. |
Plans
Kill Bill
- Kill Bill open sourceFree
- Self-Hosted Open SourceFree
- Aviate$9,999 a month
- AWS MarketplacePrice not published
- Hosted Platform (ChaChing)Priced on request
UniBee
- Open-sourceFree
- Open-sourceFree
- Starter$99 a month
- Business$399 a month
- AdvancedPriced on request
In their own words
Kill Bill
Kill Bill is an open-source, programmable billing platform with APIs for pricing models, subscriptions, invoices, and payment gateway integrations. It supports usage-based billing, and plugins connect its payment platform to gateways, issuing banks, and fraud tools. The web-based Kaui back-office interface lets teams configure price books and manage subscriptions and payments. Listed integrations include Stripe, Adyen, PayPal, Braintree, GoCardless, Coinbase, Avalara, and Vertex. Installation options include Docker and Tomcat; Kill Bill can run on Windows, Mac, or Linux computers, or on a Linux cloud server. Described security controls include encryption at rest and in transit, TLS communications, AES-256 stored-data encryption, audit logs, role-based access, and multi-tenant isolation. The self-hosted open-source option includes community support, but customers operate and upgrade it; paid support tiers are purchased separately for customer-managed deployments. The AWS Marketplace option is listed at ~$40/mo, plus AWS infrastructure costs. Hosted-platform pricing follows a separate commercial model. The maker describes the product as serving online businesses, customization-focused teams, startups, and growth-stage companies.
UniBee
UniBee is an open-source subscription billing platform offered as self-hosted software or a managed cloud service. It handles one-time purchases, recurring charges, usage-based billing, tiered prices, promotions, and flexible billing frequencies. Its metering can track measures such as API calls, storage, compute time, or custom metrics and bill against actual use. Subscription tools cover plan changes, pauses, upgrades, downgrades, trials, add-ons, and lifecycle automation. UniBee can generate invoices, customize templates, handle taxes, and send invoices by email or make them available as PDFs. Payment options include gateways such as Stripe and PayPal, with routing and fallback options. The service lists more than 25 integrations and analytics for MRR, ARR, churn, and customer lifetime value. Open-source is free but self-hosted, requires manual setup, and has community support. Starter costs $99 a month; Business costs $399 a month. Advanced offers cloud or on-prem deployment, with pricing available by conversation.