Convex is a TypeScript-native reactive backend that bundles a document-relational database, server functions, file storage, scheduling, and durable workflows into one system. Client queries stay subscribed, so the interface updates whenever the underlying data changes without a separate realtime layer. It serves TypeScript and React teams building live-updating apps who want database, functions, and sync from a single vendor.[1][2]
Quick verdict
Convex fits TypeScript and React teams building live-updating apps where realtime sync is the core interaction. Its decisive strength is the subscribed-query model: database, functions, storage, and scheduling arrive as one reactive system with no SQL layer. The material constraint is per-developer pricing plus a TypeScript-only, source-available platform, so large or SQL-invested teams should look elsewhere. If your team writes TypeScript and lives in React, choose Convex; if you need Postgres portability or per-project pricing, choose Supabase.[1][2][3]
Key features
Reactive TypeScript queries Queries are TypeScript functions that stay subscribed, so every client watching a query receives the update automatically when the data it depends on changes.[1]
Mutations as automatic transactions Each mutation runs as one ACID transaction with serializable isolation and optimistic concurrency control, with automatic retries on conflicts and no manual begin or end statements.[1]
Actions for side effects General-purpose action functions can call external APIs and then read or write through query and mutation functions, keeping non-deterministic work outside the transactional path.[1]
Document-relational data model Tables hold JSON-like nested documents with ID-based relations, indexes, and code-defined validation, with no SQL to write and no ORM layer.[1]
Built-in file storage File storage ships inside the same backend as the database and functions, so uploads and attachments need no separate object-store service.[1][2]
Scheduling and durable workflows Cron scheduling and durable workflow execution run inside the platform, covering recurring jobs and long-running multi-step processes.[1]
React and Next.js integrations First-party client libraries for React, Next.js, and React Native bind subscribed queries to interface state, which is where the realtime behaviour pays off.[1]
Managed cloud plus self-host option The managed cloud is the default path while the backend repository is source-available under FSL-1.1 converting to Apache-2.0 after two years; the vendor notes self-hosting is not for everyone and the open-source build is described as single-node.[1][2][3]
Who will love it
TypeScript and React teams building live-updating collaborative apps get the most: subscribed queries remove the manual realtime layer they would otherwise build.[1][2]
Small teams that want database, functions, storage, scheduling, and workflows from one vendor fit the bundled system better than assembling five separate services.[1]
Hobby and prototype teams fit the free tier well, since the paid per-developer scale only bites once the team itself grows.[1]
Who should avoid it
Teams requiring OSI-approved open source should avoid it: the Functional Source License is source-available with commercial-use restrictions, and GitHub reports it simply as Other.[1][2]
Cost-sensitive teams with many developers should model carefully: per-developer billing means a 20-developer app costs far more than the same app on per-project rivals.[1]
Teams invested in SQL, Postgres tooling, or a portable data layer should avoid it: queries are TypeScript-only and the SDK and data model map onto nothing else, so leaving later means a rewrite.[1][2]
What the reports suggest
Inspected sample: official Convex understanding docs, the convex-backend repository page, one October 2026 DEV community self-hosting guide, one September 2026 priced Firebase-alternatives comparison, and one March 2026 Convex/Supabase/Firebase SaaS comparison. No Reddit or G2 originals were quotable; testimonials are intentionally empty.
1 cited community source. No Reddit or G2 originals were quotable: G2 review reads were blocked during research and Reddit search returned no inspectable firsthand report. The DEV guide and the two comparisons are editorial analyses, not user-prevalence signals; treat their agreement on pricing and self-hosting as feature and cost-model findings, not satisfaction scores.
The independent 2026 comparisons agree on the shape of the tradeoff: Convex leads on TypeScript-native realtime developer experience, while per-developer pricing is the recurring counterpoint against Supabase and Firebase.[1][2]
No inspected firsthand user report was quotable, so treat the published comparisons as editorial analysis of features and price models rather than evidence about how common any experience is.[1][2]
How it compares
Choose Convex when the whole team writes TypeScript and realtime updates are the core interaction; the subscribed-query model is the decisive advantage.[1][2]
Choose Supabase when Postgres compatibility, SQL access, or per-project pricing matters more; it is Apache-2.0 and far cheaper for large teams on the modelled app.[1][2]
Choose Firebase when Google-ecosystem breadth, mature mobile SDKs, and a console-led workflow outweigh lock-in concerns; it is the most established of the three.[1]
Questions worth asking
What is the best Convex alternative for non-technical users?
Is Convex really no-code?
No. There is a visual dashboard for managing the project, but real work means writing TypeScript query, mutation, and action functions plus a code-defined schema. Teams without a developer will stall at the first feature.[1]
How much does Convex cost per month?
Convex Professional is priced per developer at $25 per month for teams of 1-20, including 50 GB of database and 50 GB of egress, then $0.12 per GB of egress. A modelled 20-developer app with 200 GB of egress costs about $518 per month; hobby projects fit the free tier. Pricing checked October 9, 2026 against rates published September 20, 2026.[1]
Can you self-host Convex?
Sources and editorial review
Source research. Reviewed on October 9, 2026. Written by Sanjib Sah. AI assisted; reviewed by a human editor.
We have not run or tested this product.
Inspected sample: official Convex understanding docs, the convex-backend repository page, one October 2026 DEV community self-hosting guide, one September 2026 priced Firebase-alternatives comparison, and one March 2026 Convex/Supabase/Firebase SaaS comparison. No Reddit or G2 originals were quotable; testimonials are intentionally empty. No Reddit or G2 originals were quotable: G2 review reads were blocked during research and Reddit search returned no inspectable firsthand report. The DEV guide and the two comparisons are editorial analyses, not user-prevalence signals; treat their agreement on pricing and self-hosting as feature and cost-model findings, not satisfaction scores.
- Convex Overview - Understanding Convex
official · Observed October 9, 2026
Official Convex understanding overview: reactive TypeScript database, queries, mutations, actions, ACID serializable isolation with optimistic concurrency, document-relational model, file storage, scheduling, and framework integrations. Read October 9, 2026.
- get-convex/convex-backend repository
official · Observed October 9, 2026
convex-backend repository page: reactive database positioning, star count, and source-available licensing identity used for the self-host and license claims. Read October 9, 2026.
- Firebase Alternatives in 2026, Priced
published measurement · Observed October 9, 2026 · Published September 20, 2026
Independent September 2026 priced comparison of Firebase alternatives: Convex FSL-1.1 source-available status, Professional per-developer pricing with included database and egress, and the modelled 20-developer cost used for the monthly-cost answer.
- Convex vs Supabase vs Firebase for SaaS Starters 2026
published measurement · Observed October 9, 2026 · Published March 17, 2026
Independent March 2026 Convex/Supabase/Firebase SaaS comparison: TypeScript-native reactive architecture, no-SQL workflow, and the three-way fit tradeoffs used for the verdict and compatibility claims.
- Self-hosted Convex alternatives in 2026
community · Observed October 9, 2026 · Published October 8, 2026
DEV community guide by Sara: Convex TypeScript DX, self-hosted backend running the same code as cloud, FSL with Apache-2.0 after two years, regions US East/Ireland/Sydney/Canada, and a cited 2025 Reddit reply from a Convex co-founder describing the open-source build as single-node.