Open Source

CockroachDB: The Distributed SQL Database That Went BSL and Then Private — The License Wave's Darkest Ending

CockroachDB began as an open-source distributed SQL database, moved to the Business Source License in 2019, and then in 2024 took the step no other major project in this wave took: it stopped publishing new source code at all. This deep dive covers the BSL, the Cockroach Community License, the move to private source, why no community fork gained traction, real costs, where your data actually lives, and an honest verdict for a sovereignty-minded operator.

2026-10-06 171 views

Open Source

HashiCorp Vault: The Secrets Manager That Changed Its License and Spawned OpenBao — A Deep Dive Into the BSL Fork

Vault guarded the world's API keys under MPL 2.0 for years. In August 2023 HashiCorp flipped it to the Business Source License alongside Terraform, and IBM engineers forked the last open version into OpenBao. This deep dive covers the relicensing, the fork, the drop-in migration, Nvidia and GitLab adoption, real self-hosting costs, where your secrets actually live, and an honest verdict for a sovereignty-minded operator.

2026-10-06 90 views

Open Source

Elasticsearch: The 70k-Star Search Engine That Went SSPL and Forked Into OpenSearch — A License Deep Dive

Elasticsearch powered search and logging under Apache 2.0 for a decade. Then in January 2021 Elastic went SSPL/Elastic License, and AWS forked the last open version into OpenSearch. This deep dive covers the relicensing, the fork, API compatibility, the AGPL olive branch, vector search divergence, real costs, data sovereignty, and how to choose in 2026.

2026-10-03 80 views

Open Source

Terraform: The 44k-Star IaC Tool That Went Source-Available and Spawned OpenTofu — A License Fork Deep Dive

Terraform defined infrastructure-as-code under MPL 2.0 for nine years. Then in August 2023 HashiCorp switched it to the Business Source License, and the community forked it into OpenTofu under the Linux Foundation. This deep dive covers the BSL change, the fork, HCL compatibility, state encryption, the IBM acquisition, real costs, and how to choose in 2026.

2026-10-03 63 views

Open Source

Redis: The 67k-Star Cache That Changed Its License and Split in Two — A Deep Dive Into the Valkey Fork

Redis powered half the internet's caches under a permissive BSD license for fifteen years. Then in March 2024 it went source-available, and within a week the Linux Foundation forked it into Valkey. This deep dive covers the relicensing, the fork, the wire-compatible migration, the Redis 8 AGPL olive branch, real self-hosting costs, and where your data actually lives.

2026-10-03 58 views

Open Source

tldraw: The 47k-Star Whiteboard You Can Fork but Cannot Ship Freely — A License Story Disguised as a Review

tldraw is a 47.5k-star infinite-canvas SDK — but since v4.0 (September 2025) it is source-available, not open source. This deep dive covers the license change, the production license key, the watermark, how tldraw sync actually works, what self-hosting still gives you, and why it belongs in the same conversation as Cal.com and Excalidraw.

2026-10-01 74 views

Open Source

VictoriaMetrics: The Single-Binary Time Series Database That Replaces Your Prometheus Stack — and the Enterprise Line You Should Know

VictoriaMetrics is a 17k-star, Apache-2.0 time series database and monitoring platform written in Go. This deep dive covers its single-binary architecture, MetricsQL, the community-versus-enterprise split, what high cardinality actually costs, and where your metrics go when you own the store.

2026-10-01 68 views

Open Source

HedgeDoc: The Collaborative Markdown Editor That Owns Your Meeting Notes — and the AGPL Fine Print You Should Read

HedgeDoc is a 7.4k-star, AGPL-3.0 real-time collaborative Markdown editor descended from HackMD's open-source edition. This deep dive covers its CodiMD lineage, the operational-transform engine, what HedgeDoc 2's stalled rewrite means for you, the real cost of running it, and where your notes actually go.

2026-10-01 68 views

Open Source

"Docmost: The Notion Alternative That Makes You Pay for SSO — and Why That Is the Right Question to Ask"

"Docmost is a 21k-star, AGPL-3.0 collaborative wiki and Notion alternative. This deep dive covers the open-core line it draws, what v0.96.0 actually shipped, and the one honest caveat every self-hosted knowledge base forces you to confront."

2026-09-29 66 views

Open Source

"CrowdSec: The Self-Hosted IPS That Turns Every Attack Into Community Intelligence"

"CrowdSec is a MIT-licensed, Go-based behavior detection engine that blocks attackers and shares their IPs across a global network. This deep dive covers the architecture, the one data-flow caveat most reviews miss, and what 'participative security' actually costs you."

2026-09-29 47 views

Life