40 free, open-source GitHub repos — every pick from all four parts of the series — that replace the paid software running most businesses: automation, databases, chat, support, BI, design, AI infra. With the repo, the bill it kills, and the exact command to deploy each.

Get The Unbilled Stack

Every repo from all four parts of the series in one field guide. The 10 newest picks (n8n, NocoDB, Mattermost, Hoppscotch, Plane, Ghost, Stirling-PDF, Meilisearch, SigNoz, Chatwoot) come with the exact deploy command and what they kill — n8n replaces Zapier, NocoDB replaces Airtable, Mattermost replaces Slack, Hoppscotch replaces Postman, Plane replaces Jira/Linear, Ghost replaces Substack, Stirling-PDF replaces Adobe Acrobat Pro, Meilisearch replaces Algolia, SigNoz replaces Datadog, and Chatwoot replaces Zendesk/Intercom. Plus reference tables of the other 30 from Parts 1, 2 & 3, a weekend self-host checklist (VPS, Docker, HTTPS, backups, one tool at a time), and the honest when-NOT-to-self-host note. Together they replace over $200,000/yr of software at team scale, for the cost of a few small servers.

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