WolveKafka
Kafka consumption as a webhook: you answer each batch, it handles the rest
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It runs publishing, ticket sales, attendee messaging, and check-in in one Apache-2.0 platform, so a paid event costs 0.99% hosted or nothing self-hosted instead of the usual double-digit fees.
Evnelo is an open event platform from InEvent for publishing events, selling tickets, messaging attendees, and running door check-in in one place. Ticketing supports tiers, discount codes, and waitlists, with card, Apple Pay, Google Pay, and Pix; attendees get QR tickets with wallet passes, and staff scan at the door with an offline browser scanner. For developers it ships a REST API, TypeScript SDK, signed webhooks, and an MCP server. Apache-2.0 and self-hostable from one container plus MySQL at no platform fee; hosted is free for free events and takes 0.99% on paid tickets above Stripe fees.
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