1. VeloCMS
VeloCMS is a headless blog CMS built on Next.js 16 and PocketBase. It addresses the specific frustrations that send people away from Squarespace: page load times (Lighthouse CI records a median LCP of 618ms, compared to 1.5–3s on typical Squarespace sites), a proper headless content API, and a membership paywall built into the platform rather than bolted on as a paid add-on. The TipTap editor ships with Gemini AI slash commands — actual writing assistance, not just a site setup wizard. Managed SaaS starts at $9/month; the self-hosted version is MIT-licensed and free. For photographers and portfolio creators in particular, the Aperture theme is designed for full-resolution galleries with client proofing, which is an area where Squarespace has historically done well — VeloCMS matches it without the lock-in.