Flexprice vs Kill Bill
Flexprice
flexprice.ioKill Bill
killbill.ioSide by side
| Figure | Flexprice | Kill Bill |
|---|---|---|
| Price from | $199/mo | $9,999/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | Yes | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 6 | 5 |
| Spec score · Subscription Billing Software | 9.1 (#2) | 9.1 (#3) |
| Spec score · Subscription Management Software | 9.2 (#1) | 9.2 (#2) |
| Spec score · Dunning Management Software | 9.1 (#3) | 9.1 (#4) |
| Founded | LinkedIn lists the company as founded in 2024. | 2010 |
| Integrations | Published connectors include Stripe, Razorpay, Chargebee, HubSpot, Zoho Books, QuickBooks, Nomod, Paddle, Moyasar and Whop. | The maker lists Stripe, Adyen, PayPal, Braintree, GoCardless, Coinbase, Avalara, and Vertex among its integrations. |
| Invoicing | Flexprice automatically turns usage data into invoices, supports previews and exports to accounting systems. | Invoices are generated as billing events occur or on billing dates and support credits, adjustments, drafts and dry runs. |
| License | The core repository is AGPLv3 open source, while a small Enterprise Edition portion is under a commercial license. | The core Kill Bill project is released under the Apache 2.0 license. |
| Rating on G2 | 4.8 out of 5 from 2 reviews | 4.5 out of 5 from 2 reviews |
| Self-hosting | Documentation covers self-hosting the backend, AWS deployment and frontend hosting, while the commercial plans also advertise VPC and on-premise options. | Kill Bill runs on premises, in a private data center or in a customer's cloud account, with billing data kept in the customer's database. |
| Support | Support channels include email, a community Slack workspace and plan-specific response-time commitments. | The self-hosted open-source option includes community support, while paid support tiers are separately purchased for customer-managed deployments. |
| What it does | Flexprice provides usage metering, billing and feature-management infrastructure for AI and SaaS products. | Kill Bill is an open-source platform for subscription billing, usage billing, invoicing and payments. |
Plans
Flexprice
- FreeFree
- Build$500 a month
- Scale$1,000 a month
- Mission CriticalPriced on request
- Pay as you go$199 a month
- Enterprise$3,000 a month
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
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.