Best alternatives to Butterbase in 2026

Building any real app or AI agent product means stitching together a database, authentication, file storage, background jobs and often several other business tools like a CRM or invoicing system — usually from different vendors that don't talk to each other well. Butterbase packages the technical building blocks into one backend, and its bigger pitch is unifying the surrounding business tools too, so a company can run from one shared system instead of five disconnected ones. Butterbase is an open-source (Apache 2.0, 2,800+ GitHub stars) backend-as-a-service with a PostgreSQL data plane (row-level security included), Deno-based serverless functions, a key-value store with TTL and audit trails, S3/R2-backed file storage, realtime WebSocket subscriptions, an AI gateway for chat and embeddings with RAG support, and a built-in MCP server for agent integration. It's used by 1,000+ businesses according to its case studies (law firms, consulting, real estate, security), with pricing running from a free Playground tier ($0/month, 500MB database, 10K MAUs) through Launch ($19/month) and Certified ($90/month) to a custom Enterprise tier, plus usage-based overages for AI credits, storage and bandwidth.