---
title: InstantDB
slug: instantdb
url: "https://toolweight.com/options/instantdb"
homepage: "https://www.instantdb.com"
categories: convex-alternatives
last_verified: 2026-07-20
license: CC-BY-4.0
---

# InstantDB

> Client-side reactive database with a relational graph model and instant sync.

InstantDB puts a real database in the browser and syncs it: queries run locally against a client store, writes apply optimistically, and the server reconciles. The query language, InstaQL, is a nested-object graph syntax rather than SQL, with permissions expressed as rules. It ships auth and file storage, has no server-side function runtime, and is open source though non-trivial to run yourself.

## Identity

|  |  |
| --- | --- |
| Name | InstantDB |
| Company | InstantDB |
| One-liner | Client-side reactive database with a relational graph model and instant sync. |
| Site | https://www.instantdb.com |
| Docs | https://www.instantdb.com/docs |
| Repo | https://github.com/instantdb/instant |
| Founded | 2022 |
| Funding | Venture-backed |
| Open source | Yes |
| Brand | https://toolweight.com/vendors/InstantDB |
| Compared in | 1 |

## Where it is compared

### [Convex alternatives](https://toolweight.com/compare/convex-alternatives)
Ranked **#8 of 11** on default weights.
| Field | Value | Confidence | Verified | Source | Note |
| --- | --- | --- | --- | --- | --- |
| Reactivity | push | Vendor-claimed | 2026-07-20 | https://www.instantdb.com/docs | Queries resolve against a local store and update as the server syncs. |
| TS inference | ● | Vendor-claimed | 2026-07-20 | https://www.instantdb.com/docs/modeling-data | Schema defined in TypeScript, inferred through InstaQL results. |
| Transactions | occ | Inferred | - | - | Transaction chunks apply atomically with server-side conflict detection. |
| Local-first sync | ● | Vendor-claimed | 2026-07-20 | https://www.instantdb.com/docs | - |
| Optimistic writes | ● | Vendor-claimed | 2026-07-20 | https://www.instantdb.com/docs | Writes apply locally first by design; the default path, not an opt-in helper. |
| Cron & scheduling | ○ | Inferred | - | - | No server-side function runtime at all. |
| File storage | ● | Vendor-claimed | 2026-07-20 | https://www.instantdb.com/docs/storage | - |
| Vector search | ○ | Inferred | - | - | - |
| Full-text search | ○ | Inferred | - | - | - |
| Auth | built-in | Vendor-claimed | 2026-07-20 | https://www.instantdb.com/docs/auth | Magic codes plus OAuth providers. |
| Hard limits | - | Unknown | - | - | No published per-record or per-query ceilings found. |
| Cold start | - | Unknown | - | - | No user-supplied function runtime to cold-start. |
| Function timeout | - | Unknown | - | - | No server functions. |
| Exit cost | 4 | Inferred | - | - | InstaQL is a proprietary graph query language over a triple store with no SQL surface, and the local-first behaviour your UI depends on has no drop-in replacement. Open source lowers vendor risk, not the rewrite. |
| Self-hostable | ◐ | Community-reported | - | - | The server is open source, but running it yourself is materially harder than using the cloud. |
| Bulk export | ◐ | Inferred | - | - | Admin SDK queries can page everything out; there is no single self-serve dump. |
| Raw SQL | ○ | Inferred | - | - | - |
| Schema changes | declarative-push | Vendor-claimed | 2026-07-20 | https://www.instantdb.com/docs/modeling-data | CLI pushes the TypeScript schema. |
| MCP server | ● | Inferred | - | - | An official MCP server is published for agent-driven app creation. |
| Agent fit | 4 | Inferred | - | - | A tiny typed surface an agent can hold in context, but with no server-side logic to write, some features cannot be finished on the backend at all. |
| Pricing model | flat + usage | Inferred | - | https://www.instantdb.com/pricing | - |
| Entry price | $30 /mo | Inferred | - | https://www.instantdb.com/pricing | Approximate, the Pro tier has moved; verify before budgeting. |
| Egress metered | - | Unknown | - | - | - |
| GitHub stars | 9,000 | Inferred | - | - | Approximate as of mid-2026. |
| Backing | venture-backed | Inferred | - | - | - |
| Positioning | A modern Firebase, a client-side database that syncs. | Vendor-claimed | 2026-07-20 | https://www.instantdb.com | - |

**Verdict.** The most pleasant developer experience here for collaborative, instant-feeling UIs, and the smallest API surface. The absence of any server-side function runtime is the constraint people hit, usually around the third feature.

## Alternatives

- [Appwrite](https://toolweight.com/options/appwrite), Open-source backend platform: databases, auth, storage, functions, self-hostable.
- [Convex](https://toolweight.com/options/convex), Reactive TypeScript backend: database, functions and live queries in one project.
- [ElectricSQL](https://toolweight.com/options/electricsql), Postgres read-path sync: stream subsets of your own database to clients over HTTP.
- [Firebase](https://toolweight.com/options/firebase), Google's app platform: Firestore documents, auth, functions, deep mobile SDKs.
- [Neon + Drizzle](https://toolweight.com/options/neon-drizzle), The DIY baseline: serverless Postgres, a typed SQL query builder, nothing else.
- [Nhost](https://toolweight.com/options/nhost), Postgres plus Hasura GraphQL, auth, storage and serverless functions.
- [PocketBase](https://toolweight.com/options/pocketbase), One Go binary: SQLite database, auth, file storage, realtime and an admin UI.
- [Zero](https://toolweight.com/options/rocicorp-zero), Sync engine that puts a queryable client cache in front of your own Postgres.
- [Supabase](https://toolweight.com/options/supabase), Managed Postgres with auth, storage, realtime and edge functions around it.
- [Triplit](https://toolweight.com/options/triplit), Full-stack database that syncs: local cache, server, relational queries, offline.

## Licence and attribution

Data from toolweight (https://toolweight.com), licensed CC-BY-4.0.

- Licence: [CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/)
- Canonical HTML: https://toolweight.com/options/instantdb
- Machine-readable: https://toolweight.com/options/instantdb.md · https://toolweight.com/api/v1 · https://toolweight.com/mcp
- toolweight takes no affiliate revenue and sells no placements. Corrections: https://toolweight.com/suggest