Kill Bill vs SubJolt

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.

SubJolt is a web tool for subscription businesses that adds save offers to cancellation flows, reactivation prompts for returning subscribers, and churn analytics through one site snippet. Before completing cancellation, a customer may be offered a discount, a subscription pause, or a plan switch. The cancellation control stays available, and customers can finish cancelling in one click. SubJolt can show a win-back banner to churned subscribers who revisit a site; its dashboard reports saved MRR and reduced churn, while exit feedback records reasons for leaving. Installation uses a pasted script or Google Tag Manager, without coding. Listed native integrations include Stripe, Shopify, Chargebee, Recurly, and Recharge; Paddle is marked coming soon. Each account connects to one payment gateway, so multiple gateways require separate accounts and subscriptions. The free Starter plan allows 50 cancel sessions per month. Pro costs $99/mo, and a 30-day trial is listed.