Kill Bill
8.3#1 in subscription billing softwareFrom $9,999 a monthFree planWebAPILinuxmacOS
VisitKill Bill vs WP Simple Pay
WP Simple Pay
6.0#52 in payment processing softwareFrom $49.50 a yearWebSelf-hosted
VisitWhat both publish
| Fact | Kill Bill | WP Simple Pay |
|---|---|---|
| Integrations | The maker lists Stripe, Adyen, PayPal, Braintree, GoCardless, Coinbase, Avalara, and Vertex among its integrations. | The pricing comparison lists AffiliateWP, Divi, Elementor, Block Editor, Zapier, and webhooks as integrations. |
| Intended users | The maker describes Kill Bill as serving online businesses, teams needing customization, startups, and growth-stage companies. | The pricing FAQ names self-employed individuals, business owners, consultants, nonprofits, and developers as intended users. |
| Security | The overview describes encryption at rest and in transit, TLS communications, AES-256 stored-data encryption, audit logs, role-based access controls, and multi-tenant isolation. | The site says payment processing and storage use Stripe’s PCI-compliant servers and that payment information does not touch the user's server. |
Kill Bill plans
- Kill Bill open sourceFree
- Self-Hosted Open SourceFree
- Aviate$9,999 a month
- AWS Marketplace—
- Hosted Platform (ChaChing)Priced on request
WP Simple Pay plans
- Personal$49.50 a year
- Plus$99.50 a year
- Professional$199.50 a year
- Elite$299.50 a year
Pick Kill Bill if…
Kill Bill may suit online businesses and teams that need customizable subscription or usage-based billing. It is also described for startups and growth-stage companies, particularly those prepared to operate a self-hosted deployment.
Pick WP Simple Pay if…
You want what its maker publishes above — check its page for the details.