Kiosk vs RelayKit
Kiosk
github.comRelayKit
relaykit.ioSide by side
| Figure | Kiosk | RelayKit |
|---|---|---|
| Price from | Free | $9/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | — | Yes |
| Self-hosted | Yes | — |
| Plans published | 2 | 3 |
| Spec score · Webhook Management Software | 8.7 (#6) | 7.8 (#20) |
| Integrations | The desktop apps support opening PDFs directly and associating Kiosk with PDF files; the extension can intercept PDFs opened in Chrome. | Inbound signature verification supports Stripe, GitHub, Shopify, Twilio, SendGrid, Paddle, Clerk, and Resend. |
| Support | The Linux release directs users to report bugs by opening a GitHub issue. | The Team plan includes priority support. |
| What it does | Kiosk is an open-source PDF reader intended to provide a simple reading experience across web, desktop, Android and browser-extension environments. | RelayKit captures, inspects, verifies, stores, and forwards webhook events from third-party services. |
Plans
In their own words
Kiosk
Kiosk is a free, open-source PDF reader for web, desktop, mobile, and browser extensions. It renders PDFs and offers full-text search with highlighted results, page thumbnails, zoom, and light, dark, and night display modes. Its Chrome extension adds highlighting, underlining, strikethrough, drawing, shapes, and text annotations. The project says PDFs stay on the device, with no telemetry, cloud processing, or account requirement. Android works offline after installation, and the extension release notes also state that offline use is supported. The web app can run locally or be deployed through GitHub Pages as a self-hosted instance. Desktop apps can open PDFs directly and associate Kiosk with PDF files; the extension can intercept PDFs opened in Chrome. The extension supports Chrome 88+, Edge 88+, and Brave, but not Firefox or Safari. The project is released under the MIT License. Its Android release is an early alpha, and the macOS app is ad-hoc signed but not notarized, so Gatekeeper may warn on first launch.
RelayKit
RelayKit is a cloud service and API for receiving, inspecting, verifying, storing, and forwarding webhook events from third-party services. One incoming event can be delivered to multiple destinations in parallel, with each destination tracked and retried independently. Failed deliveries receive automatic retries of up to 20 attempts, and users can replay events manually. Inbound signature verification supports Stripe, GitHub, Shopify, Twilio, SendGrid, Paddle, Clerk, and Resend. Security controls include IPv4 and IPv6 IP allowlisting, configurable rate limits, and audit records for rejected requests. RelayKit says it forwards the original request body and headers, except for specified hop-by-hop headers. The @relaykit/cli can send webhooks to a local development server and requires Node.js 18 or later. Hobby costs nothing for 1,000 webhooks monthly. Pro costs $9 a month for 100,000 webhooks, and Team costs $29 a month for 500,000. Team adds Schema Sentinel, Time Machine replay, and priority support.