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A hands-on 2026 review of ToolJet, the open-source (AGPL-3.0), self-hosted low-code builder for internal tools. What you actually get for free, the AI credit pricing, the license trap, and whether it fits a Next.js SaaS.
You already run Postgres. In 2026, pgvector often is your vector database for a Next.js RAG app, until specific thresholds say otherwise.
The best open-source, self-hostable Retool alternatives for a Next.js SaaS in 2026: Appsmith, ToolJet, Budibase, Refine, and Windmill, compared by license, cost, and whether they run as a separate server or live in your app.
CopilotKit, assistant-ui, and Vercel AI SDK UI sit at three different layers of the stack. A hands-on 2026 guide to picking the right open-source AI chat UI for your Next.js SaaS.
Most people searching for a Node.js workflow engine are holding two problems at once. We split the shelf along that seam: job queues (BullMQ, pg-boss) on one side, workflow engines with durable execution (Hatchet, Trigger.dev, Temporal, Inngest) on the other, and the test that tells you which one you need.
Appsmith, ToolJet, and Budibase are the open-source answer to Retool. We compare the three self-hostable internal tools builders for a Next.js SaaS in 2026, split honestly by license and by weight.
A curator's take on the three open-source auth picks for a Next.js SaaS in 2026 (Better Auth, Auth.js, Supabase Auth), and the one axis that decides which shelf you pull from.
Sentry vs GlitchTip vs Highlight for error monitoring in a Next.js SaaS in 2026: the license fork, what each costs to self-host, and honest where-each-loses.
Meilisearch, Typesense, and Elasticsearch for search in a Next.js SaaS in 2026: where the engine runs, the license ceiling, and honest where-each-loses, with real repos and costs.
Refine, React-Admin, and AdminJS are the three open-source ways to add an admin panel to a Next.js SaaS in 2026. We compare architecture, deploy path, real cost, and where each one loses.
Payload, Strapi, and Directus for a Next.js SaaS content layer in 2026: Next.js-native vs standalone, schema-first vs database-first, and the license ceiling that decides the tie.
Drizzle, Prisma, and Kysely for the data layer of a Next.js SaaS in 2026: why they are not the same category, real repos and costs, and honest where-each-loses.
