The Modback Stack

Five subsystems and one platform. Each one runs whether or not you use the others, and each one is a separate Rust crate you can read.

query / scale

Modback Postgres

Postgres 16 with row-level security enforced in the database, not bolted on in application code. JSONB, pgvector and pg_trgm, plus an auto-generated REST layer over every table.

modback-postgres · modback-query

auth / trust

Modback Auth

Email and password with verification, magic links, OAuth providers, TOTP and SMS multi-factor, and SAML/SSO for enterprise. JWT sessions throughout.

modback-auth

store / serve

Modback Storage

One S3-compatible API across six providers, with priority-based ACL, native replication strategies, TTL auto-expiration and Redis-backed caching for sub-50ms downloads.

modback-storage

graph / fetch

Modback GraphQL

Types, queries, mutations and subscriptions derived straight from your schema, with an interactive playground and custom resolvers.

modback-graphql

sync / live

Modback Realtime + Edge

WebSocket subscriptions under 10ms with presence, pub/sub and broadcast channels, plus Deno and WASM edge functions with sub-50ms cold starts.

modback-realtime · modback-edge

Storage providers

The storage crate speaks one S3-compatible API to six backends, so switching providers is a configuration change rather than a rewrite.

AWS S3: Enterprise, global infrastructure
Cloudflare R2: Zero egress fees, 300+ edge locations
Google Cloud Storage: AI/ML workloads, BigQuery
Azure Blob: Enterprise hybrid, 60+ regions
DigitalOcean Spaces: Developer-friendly, cost-effective
SeaweedFS: Self-hosted, Apache 2.0, data sovereignty

Also in the workspace

Webhooks

Async workflows with intelligent retry and delivery guarantees.

Multi-tenancy

Tenant isolation backed by Postgres row-level security.

Observability

Prometheus metrics and OpenTelemetry traces from the first request.

Search

A unified platform for keyword, semantic and instant search.

Billing

Usage metering for products built on top of Modback.

Zones

Multi-zone routing with locality hints.

Modback is at v0.1.0. 16 of 25 crates are production-ready; the remaining nine — including edge functions, CRDT sync and the AI crates — are in active development. See status for the full breakdown.